TWI439908B - Touch input device - Google Patents

Description

Touch input device

The present invention relates to a touch input device and a touch sensing circuit, and more particularly to a touch input device and a touch sensing circuit capable of suppressing electromagnetic interference.

As technology advances, the products, communications, electronics and other products are becoming more diversified and humanized. For example, through touch panels, tablets, and other products, users can directly use the finger or stylus to operate programs or input messages on the panel, eliminating the need for input devices such as mice or keyboards.

The technology of the existing touch panel can be roughly classified into a resistive type, a capacitive type, an optical type, and an ultrasonic type. The main components of the resistive touch panel include upper and lower layers of indium tin oxide conductive glass (ITO glass). When the object touches the upper conductive glass to be recessed to contact the underlying conductive glass, the controller of the panel detects a voltage signal and determines the coordinate position of the contact point accordingly.

The capacitive touch panel is further divided into a surface capacitive touch panel and a projected capacitive touch panel. The structure of the surface capacitive touch panel comprises a piece of conductive glass coated on both sides of the conductive glass with a conductive material, and the outer side of the conductive glass is further coated with a scratch-resistant coating film. The electrodes around the glass plate create a uniform electric field on the surface of the glass. Whenever the user touches the panel with a finger, his finger will be coupled with the capacitance on the outer conductive layer, sucking the tiny on the panel. Current. The amount of current flowing from the electrodes located at each corner of the touch panel is proportional to the distance from the finger to the corner. The controller of the touch panel obtains the position information of the contact point by calculating the current ratio.

Recently, projected capacitive touch panels are widely used in various touch electronic devices (such as smart phones). The positioning principle of the projected capacitive touch panel is to determine the position of the contact point by using the capacitance change of the induction grid embedded in the touch panel. Please refer to FIG. 1A. FIG. 1A is a schematic diagram of the touch panel 10 in the prior art. As shown in FIG. 1A, the touch panel 10 is embedded in a plurality of X-directional wires (including X1 to Xm) and a plurality of Y-directional wires (including Y1 to Yn) in a layered manner. The X-direction wire and the Y-direction wire are alternately arranged to form an induction grid, and a capacitance node is formed at the intersection of each X-direction wire and the Y-direction wire (for example, the capacitance nodes 100a, 100b, 100c in FIG. 1A), for example, In this example, there are a total of m*n capacitor nodes. When the finger touches the screen, the coupling relationship of the finger to the sensing grid will change the capacitance value of the adjacent capacitive node on the sensing grid. The detection circuit can calculate the coordinate position of the contact point by using the capacitance change of the capacitance node on the sensing grid.

Please refer to FIG. 1B. FIG. 1B is a schematic diagram of the touch input device 1 in the prior art. As shown in FIG. 1B , the touch input device 1 of the prior art includes a touch sensing circuit used in conjunction with the touch panel 10 . The touch sensing circuit can include a multiplexer 12, a control circuit 120, and a detection module 14 therein. In the actual circuit, the detection module 14 can be a capacitance measuring circuit.

In practical applications, the control circuit 120 can control the multiplex selector 12, And selecting a specific X-direction wire (X1~Xm) and a Y-direction wire (Y1~Yn) through the multiplexer 12 to select a specific capacitor node, for example, the multiplexer 12 can select the X-direction wire X3 and the Y direction. Wire Y3 corresponds to capacitor node 100a. The detection module 14 can generate the detection pulse signal Sdet and input the detection pulse signal Sdet to the capacitance node 100a through the multiplex selector 12. Then, the detecting module 14 can determine the touch detection state of the capacitor node 100a according to the signal feedback of the detected pulse signal Sdet input to the capacitor node 100a.

The control circuit 120 can also control the multiplexer 12 to select one X or Y direction wire one by one by the multiplexer 12 to scan the capacitor node row by row/row by column (equivalent to one line or one column at a time) Capacitor node). Please refer to FIG. 2 . FIG. 2 is a timing diagram of the touch input device 1 generating a detection pulse signal Sdet for different capacitance nodes. As can be seen from FIG. 2, the detected pulse signal Sdet is sequentially input to the X-directional wires such as X1, X2, X3, X4, and the like.

The detection pulse signal Sdet here is usually a voltage signal or a current signal with a high frequency periodic pulse wave. When the detecting module 14 inputs the high frequency detecting pulse signals into a specific capacitor node (such as the capacitor node 100a), it will cause other electronic components (such as liquid crystal display screens) adjacent to the touch panel 10 in the electronic system. The phenomenon of electromagnetic interference may also cause electromagnetic interference to adjacent capacitor nodes (such as capacitor nodes 100b, 100c).

Under the gradual improvement of the accuracy of touch panels today, designers are anxious to reduce the error in the judgment of touch signals. On the other hand, under the temptation to make the volume of various consumer electronic devices thinner and thinner, eliminate or avoid Electromagnetic interference between different electronic components has also become an important issue.

The invention provides a touch input device which can suppress electromagnetic interference and is widely applicable to various electronic systems of touch input to solve the above problems.

One aspect of the present invention provides a touch input device including a touch panel, a selection module, and a detection module.

According to an embodiment, the touch panel includes a plurality of capacitor nodes formed and distributed on the touch panel. The selection module is electrically connected to the plurality of capacitance nodes of the touch panel, and the selection module selects the first capacitance node set and the second capacitance node set among the plurality of capacitance nodes. The first and second sets of capacitive nodes herein respectively comprise at least one capacitive node, and the second set of capacitive nodes is adjacent to the first set of capacitive nodes.

The detection module is electrically connected to the selection module. The detection module includes a signal generator for generating a detection pulse signal, and the detection pulse signal is input to the first capacitor node set through the selection module, and the detection module Determining a touch detection state of the first capacitive node set according to the detected pulse wave signal input to the first capacitive node set, and the signal generator generates an inverted pulse wave signal opposite to the phase of detecting the pulse wave signal, The inverted pulse signal is input to the second set of capacitive nodes through the selection module.

Another aspect of the present invention provides a touch input device including a touch panel, a selection module, a first detection module, and a second detection module.

According to an embodiment, the touch panel includes a plurality of capacitor nodes formed and distributed on the touch panel. Selecting the plurality of modules and touch panels The capacitor node is electrically connected, and the selection module selects the first capacitor node set and the second capacitor node set in the plurality of capacitor nodes. The first and second sets of capacitive nodes herein respectively comprise at least one capacitive node, and the second set of capacitive nodes is adjacent to the first set of capacitive nodes.

The first detection module is electrically connected to the selection module. The detection module includes a first signal generator for generating a first detection pulse signal, and the first detection pulse signal is input to the first through the selection module. The first detection module determines the first touch detection state of the first capacitive node set according to the first detection pulse signal input to the first capacitive node set. The second detection module is electrically connected to the selection module, and the second detection module includes a second signal generator for generating a second detection pulse signal, wherein the second detection pulse signal and the first detection pulse The second detection pulse signal is input to the second capacitance node set through the selection module, and the second detection module is determined according to the second detection pulse signal input to the second capacitance node set. The second touch detection state of the two capacitive node sets.

The advantages and spirit of the present invention will be further understood from the following detailed description of the invention.

Please refer to Figure 3. FIG. 3 is a schematic diagram of the touch input device 3 in the first embodiment of the present invention. The touch input device 3 includes a touch panel 30 , a selection module 32 , and a detection module 34 .

In this embodiment, the touch panel 30 includes a plurality of X-directional wires (X1~Xm) and a plurality of Y-directional wires (Y1~Yn), and the X-directional wires and the Y-directional wires are arranged in a grid shape, as shown in FIG. The middle X and Y direction wires are horizontally and vertically staggered to form a well-shaped grid, but the present invention does not This is limited to the wire arrangement of other directions or angles. A capacitor node is formed in each of the X-direction wires and the Y-direction wires (300 in FIG. 3). In other words, the touch panel includes a plurality of capacitor nodes, and one of the X-directional wires and one of the Y-directional wires are respectively formed and distributed on the touch panel 30. In practical applications, the touch panel can be a projected capacitive touch panel or other similar capacitive touch panels.

As shown in FIG. 3 , the selection module 32 is electrically connected to the capacitor nodes of the touch panel 30 . The detection module 34 is electrically connected to the selection module 32.

In this embodiment, the selection module 32 further includes a first multiplexer 322, a second multiplexer 324, and a control circuit 320 for controlling the multiplexer. The first multiplexer 322 and the second multiplexer 324 are respectively coupled between the touch panel 30 and the detection module 34. The first multiplexer 322 and the second multiplexer 324 are electrically connected to the X-directional wires (X1 to Xm) and the Y-directional wires (Y1 to Yn) of the touch panel 30, respectively.

The selection module 32 can control the first multiplexer 322 and the second multiplexer 324 to select a first set of capacitive nodes and a second set of capacitive nodes from all the capacitive nodes on the touch panel 30 by using the control circuit 320. The first and second sets of capacitive nodes herein respectively comprise at least one capacitive node, and in the present invention the second set of capacitive nodes selected by the second multiplexer 324 is designed to be adjacent to the first multiplexer 322. The selected first set of capacitive nodes.

It should be particularly noted that the first set of capacitive nodes and the second set of capacitive nodes herein may include at least one capacitive node. In practical applications, the capacitor nodes are assembled into a capacitor node, a plurality of adjacent capacitor nodes, a whole row or an entire column of capacitor nodes.

The following is a brief description of the selection of three sets of capacitor nodes.

Please refer to Figure 4A, Figure 4B and Figure 4C. FIG. 4A to FIG. 4C respectively show three examples of selection examples of the first capacitive node set N1 and the second capacitive node set N2.

As shown in FIG. 4A, the first capacitive node set N1 selected by the first multiplex selector may include a single capacitive node 300a, and the second capacitive node set N2 selected by the second multiplex selector may include a single one. Capacitor node 300b. The first multiplexer selects one of the X-directional wires (X3 in FIG. 4A) from the plurality of X-directional wires and selects one of the Y-directional wires from the plurality of Y-directional wires (FIG. 4A, Y3) Thereby, the capacitor node 300a is selected to form a first set of capacitive nodes N1. On the other hand, the second multiplexer selects one of the X-directional wires (X3 in FIG. 4A) from the plurality of X-directional wires and selects one of the Y-directional wires from the plurality of Y-directional wires (FIG. 4). Y2) in A, whereby the capacitor node 300b is selected to form a second set of capacitive nodes N2.

As shown in FIG. 4B, the first capacitive node set N1 selected by the first multiplexer may include a plurality of capacitive nodes 300a', and the second capacitive node set N2 selected by the second multiplexer may also include A plurality of capacitor nodes 300b'. The first multiplexer selects at least one X-directional wire from the plurality of X-directional wires (X1~X3 in FIG. 4B) and selects at least one Y-directional wire from the plurality of Y-directional wires (as shown in FIG. 4B). Y3), thereby selecting at least one capacitive node 300a' to form a first set of capacitive nodes N1. The second multiplexer selects at least one X-directional wire from the plurality of X-directional wires (X1~X3 in FIG. 4B) and selects at least one Y-directional wire from the plurality of Y-directional wires (as shown in FIG. 4B). Y2), thereby selecting at least one capacitive node 300b' to form a second set of capacitive nodes N2.

As shown in FIG. 4C, the first capacitive node set N1 selected by the first multiplexer may include an entire row or an entire column of capacitive nodes, and the second multiplexed selector selects the second capacitive node set N2. It can also contain an entire row or an entire column of capacitor nodes. In the selected example of FIG. 4C, the first multiplexer selects one of the X-directional wires X3 and grounds or vacates the plurality of Y-directional wires (Y1~Yn), thereby selecting the corresponding X-direction wire X3. All capacitor nodes form a first set of capacitive nodes N1. At the same time, a second multiplexer is coupled between the touch panel and the detection module, the second multiplexer and the plurality of X-directional wires of the touch panel and the plurality The Y-directional wires are electrically connected, and the selection module selects a second X-directional wire X2 from the plurality of X-directional wires through the second multiplex selector and grounds the plurality of Y-directional wires (Y1~Yn) or Emptying, thereby selecting all capacitor nodes corresponding to the second X-directional wire X2 and forming the second set of capacitance nodes N2.

In summary of the above examples, the method of selecting a capacitor node to form a capacitor node in the present invention includes at least adjacent nodes on one or more wires in a horizontal or vertical direction. That is to say, the selection of the set of capacitor nodes in the present invention may be a single point, a horizontal direction extension, a vertical direction extension or a block type selection.

The following paragraphs are further illustrated by the selected examples in Figure 4A. Please refer to Figure 3 and Figure 4A at the same time. As shown in FIG. 3, the detection module 34 includes a signal generator 340 for generating a detection pulse signal Sdet, and the detection pulse signal Sdet can be input to the first multiplex selector 322 of the selection module 32. A set of capacitive nodes N1 (please refer to FIG. 4A), the detecting module 34 determines the touch detection state of the first capacitive node set N1 according to the detected pulse signal Sdet input to the first capacitive node set N1.

For example, when the user touches the position of the capacitor node 300a on the touch panel 30 (ie, the first capacitor node set N1 in this example), the capacitor node 300a will cause a capacitance value change. At this time, corresponding to the change of the capacitance value, the detecting module 34 can know the signal feedback of the detected pulse signal Sdet input to the first capacitive node set N1, thereby knowing the first capacitive node set N1. Touch detection status.

It should be noted that, in the present invention, when the signal generator 340 of the detecting module 34 generates the detecting pulse signal Sdet to the first capacitive node set N1, it also generates and detects the phase of the pulse signal Sdet. In contrast, the inverted pulse signal Sinv, as shown in FIG. 3, in this embodiment, the inverted pulse signal Sinv can be generated by a simple inverter circuit based on the detected pulse signal Sdet, but the present invention does not limit. In another embodiment, two sets of synchronized but inverted output signal generators may be separately generated or generated by other signals, which are well known to those skilled in the art and will not be further described herein. Here, the inverted pulse signal Sinv is input through the selection module 32 to the second capacitive node set N2 adjacent to the first capacitive node set N1.

Referring to FIG. 5 together, FIG. 5 illustrates a timing diagram of the touch input device 3 sequentially generating the detected pulse signal Sdet and the inverted pulse signal Sinv for different sets of capacitance nodes. As shown in FIG. 5, during a specific detection period (such as time point t0 to time point t1 in FIG. 5), the detection module 34 simultaneously generates and detects the pulse signal Sdet and the inverted pulse signal Sinv. To the adjacent two sets of capacitor nodes. In this way, the detection pulse signal Sdet can be used to sense the touch detection state of the capacitor node, and at the same time, the inverted pulse signal Sinv can be used to suppress the detection of the pulse signal Sdet to other electronic components. Electromagnetic radiation interference also helps to suppress the electromagnetic conduction interference of the pulse signal Sdet to other capacitor nodes.

In summary, the touch input device 3 generates an inverted pulse signal Sinv that is inverted from the detected pulse signal Sdet and is input to the vicinity of the set of capacitance nodes to be detected to reduce the detection of the pulse signal Sdet. The electromagnetic interference effect, but the invention is not limited thereto.

Please refer to Figure 6. FIG. 6 is a schematic diagram of the touch input device 5 in the second embodiment of the present invention. The maximum difference from the first embodiment is that the touch input device 5 includes a plurality of detection modules, such as the first detection module 54 and the second detection module 56 in FIG.

In this embodiment, the first detection module 54 and the second detection module 56 respectively include respective signal generators (540, 560) to generate a first detection pulse signal Sdet+ and a second detection pulse wave. Signal Sdet-. The first detection pulse signal Sdet+ can be input to the first capacitive node set through the selection module 52 for determining the touch detection state of the first capacitive node set. The second detection pulse signal Sdet- can be input to the second set of capacitance nodes adjacent to the first set of capacitance nodes through the selection module 52 for determining the touch detection state of the second collection of capacitance nodes.

It should be specially noted that the first detection pulse signal Sdet+ and the second detection pulse signal Sdet- are mutually inverted, that is, the first detection pulse signal Sdet+ and the second detection pulse signal Sdet- Mutual suppression of each other's electromagnetic interference and improve the stability of the system. On the other hand, the first detecting module 54 and the second detecting module 56 can simultaneously determine the touch of the two capacitive node sets according to the first detecting pulse signal Sdet+ and the second detecting pulse signal Sdet-, respectively. Controlling the detection state can theoretically increase the speed of touch detection by at least two times. Please refer to Figure 7. FIG. 7 illustrates that the touch input device 5 sequentially generates the first detected pulse signal Sdet+ and the second detection for different sets of capacitance nodes. Schematic diagram of the pulse signal Sdet-.

For example, the detection corresponding to FIG. 7 may be that the first detection module 54 inputs the first detection pulse signal Sdet+ from the X-direction wire X3, and all the Y-direction wires (Y1~Yn) are grounded or connected. The first capacitive node set N1 is formed by selecting all the capacitor nodes corresponding to X3, that is, detecting whether a touch occurs on (X3, Y1~Yn). The second detecting module 56 inputs the second detecting pulse signal Sdet- from the X-direction wire X4, and grounds or nulls all the Y-directional wires (Y1~Yn) to select all the capacitor nodes corresponding to X4 to form a second. The capacitor node sets N2, that is, detects whether a touch occurs on (X4, Y1~Yn).

In summary, in the touch input device 5 of the present invention, the relative positional relationship between the selected first capacitive node group and the second capacitive node set capacitor node is not limited to a vertical or horizontal adjacent relationship. For example, in another operation example, each capacitor node group may be formed by adjacent adjacent capacitor nodes that are horizontally adjacent, ring-shaped, square, oblique, or other geometric arrangement, and the number of components of the capacitor node is not limited to a single. It can also be two or more capacitor nodes, which can achieve similar or faster detection and judgment effects. The operation and principle of the other internal components of the touch input device 5 in the second embodiment are substantially the same as those in the first embodiment, and are not described herein.

Compared with the prior art, the present invention inputs a set of mutually synchronized but inverted pulse wave signals into adjacent capacitor nodes or adjacent capacitor node groups, and performs touch state detection and judgment, and uses pulse signals to reverse each other. The relationship reduces electromagnetic interference to other components in the system and improves the stability of the touch input device.

With the details of the above preferred embodiments, it is hoped that it will be clearer. The invention is not limited by the scope of the invention as described in the preferred embodiments. On the contrary, the intention is to cover various modifications and equivalents within the scope of the invention as claimed.

1, 3, 5‧‧‧ touch input device

10, 30, 50‧‧‧ touch panels

12, 32, 52‧‧‧ touch sensing circuit

100a, 100b, 100c, 300a, 300b, 300c‧‧‧ capacitor nodes

300, 500‧‧‧ capacitor nodes

T0, t1‧‧‧ time point

12‧‧‧Multiplex selector

14, 34‧‧‧Detection module

54‧‧‧First detection module

56‧‧‧Second detection module

320, 520‧‧‧Selection module

340, 540, 560‧‧‧ signal generator

322, 522‧‧‧ first multiplex selector

324, 524‧‧‧Second multiplex selector

120, 320, 520‧‧‧ control circuit

X1, X2, X3, X4, Xm‧‧‧X direction wires

Y1, Y2, Y3, Y4, Yn‧‧‧Y direction wires

Sdet‧‧‧Detecting pulse wave signals

Sinv‧‧‧ reverse pulse signal

Sdet+‧‧‧First detection pulse signal

Sdet-‧‧‧Second detection pulse signal

FIG. 1A is a schematic diagram of a touch panel in the prior art.

FIG. 1B is a schematic diagram of a touch input device in the prior art.

FIG. 2 is a timing diagram showing the detection of pulse signals by different touch nodes in the prior art.

FIG. 3 is a schematic diagram of a touch input device according to a first embodiment of the present invention.

FIG. 4A is a schematic diagram showing an example of selecting a first set of capacitive nodes and a second set of capacitive nodes.

FIG. 4B is a schematic diagram showing an example of selecting a first set of capacitive nodes and a second set of capacitive nodes.

FIG. 4C is a schematic diagram showing an example of selecting a first set of capacitive nodes and a second set of capacitive nodes.

FIG. 5 is a timing diagram showing the steps of generating a detection pulse signal and an inverted pulse wave signal by the touch input device in the first embodiment.

6 is a schematic diagram of a touch input device in a second embodiment of the present invention.

FIG. 7 illustrates the second embodiment of the touch input device in different order The collection of capacitor nodes generates a timing diagram of the first detected pulse wave signal and the second detected pulse wave signal.

5‧‧‧Touch input device

50‧‧‧ touch panel

52‧‧‧Touch sensing circuit

500‧‧‧capacitor node

54‧‧‧First detection module

56‧‧‧Second detection module

520‧‧‧Selection module

522‧‧‧First multiplex selector

524‧‧‧Second multiplex selector

520‧‧‧Control circuit

X1, X2, X3, X4, Xm‧‧‧X direction wires

Y1, Y2, Y3, Y4, Yn‧‧‧Y direction wires

Sdet+‧‧‧First detection pulse signal

Sdet-‧‧‧Second detection pulse signal

Claims (17)

A touch input device includes: a touch panel, comprising: a plurality of capacitor nodes formed and distributed on the touch panel; and a selection module electrically connected to the plurality of capacitor nodes of the touch panel The selection module selects a first capacitive node set and a second capacitive node set adjacent to the first capacitive node set in the plurality of capacitive nodes; and a detection module electrically coupled to the selection module The detection module includes a signal generator for generating a detection pulse signal, and the detection pulse signal is input to the first capacitive node set through the selection module, and the detection module is The detecting pulse signal input to the first capacitive node set determines a touch detection state of the first capacitive node set, and the signal generator generates a phase opposite to the detected pulse signal phase. The phase pulse signal is input to the second set of capacitance nodes through the selection module to suppress electromagnetic interference of the detection pulse signal to the second capacitance node set. The touch input device of claim 1, wherein the touch panel is a projected capacitive touch panel. The touch input device of claim 1, wherein the touch panel comprises a plurality of X-directional wires and a plurality of Y-directional wires, and the plurality of X-directional wires and the plurality of Y-directional wires are arranged one another. In the form of a grid, each of the plurality of capacitor nodes is formed corresponding to one of the X-directional wires and one of the Y-directional wires. The touch input device of claim 3, wherein the selection module comprises: a first multiplexer coupled to the touch panel and the detection module, the first plurality The plurality of X-directional wires and the plurality of Y-directional wires of the touch panel are electrically connected to the plurality of Y-directional wires, and the selection module selects one of the X directions from the plurality of X-directional wires through the first multiplex selector And selecting one of the Y-directional wires from the plurality of Y-directional wires, thereby selecting one of the capacitor nodes from the plurality of capacitive nodes of the touch panel to form the first capacitive node set; and a second multiplexing option The second multiplexer is electrically connected to the plurality of X-directional wires of the touch panel and the plurality of Y-directional wires, and the selection is electrically connected between the touch panel and the detecting module. The module selects one of the X-directional wires from the plurality of X-directional wires through the second multiplexer and selects one of the Y-directional wires from the plurality of Y-directional wires, thereby the plurality of capacitors from the touch panel Node selection One of the capacitor nodes is taken to form the second set of capacitor nodes. The touch input device of claim 3, wherein the selection module comprises: a first multiplexer coupled to the touch panel and the detection module, the first plurality The plurality of X-directional wires and the plurality of Y-directional wires are electrically connected to the touch panel, and the selection module selects at least one X direction from the plurality of X-directional wires through the first multiplex selector. And selecting at least one Y-directional wire from the plurality of Y-directional wires, thereby taking the complex from the touch panel Selecting at least one of the plurality of capacitive nodes to form the first set of capacitive nodes; and a second multiplexer coupled between the touch panel and the detecting module, the second multiplexing option The plurality of X-directional wires of the touch panel and the plurality of Y-directional wires are electrically connected to the touch panel, and the selection module selects at least one X-directional wire from the plurality of X-directional wires through the second multiplexer and Selecting at least one Y-directional wire from the plurality of Y-directional wires, thereby selecting at least one capacitive node from the plurality of capacitive nodes of the touch panel to form the second capacitive node set. The touch input device of claim 3, wherein the selection module comprises: a first multiplexer coupled to the touch panel and the detection module, the first plurality The plurality of X-directional wires and the plurality of Y-directional wires of the touch panel are electrically connected to the plurality of Y-directional wires, and the selection module selects a first X from the plurality of X-directional wires through the first multiplex selector. Directional wires and grounding or emptying the plurality of Y-directional wires, thereby selecting all capacitive nodes corresponding to the first X-directional wires and forming the first capacitive node set; and a second multiplex selector coupled Between the touch panel and the detection module, the second multiplexer is electrically connected to the plurality of X-directional wires of the touch panel and the plurality of Y-directional wires, and the selection module transmits the The second multiplexer selects a second X-directional wire from the plurality of X-directional wires and grounds or vacates the plurality of Y-directional wires, thereby selecting all capacitor nodes corresponding to the second X-directional wires and forming The second set of capacitance nodes. The touch input device of claim 3, wherein the selection module comprises: a first multiplexer coupled to the touch panel and the detection module, the first plurality The plurality of X-directional wires and the plurality of Y-directional wires of the touch panel are electrically connected to the plurality of Y-directional wires, and the selection module grounds or vacates the plurality of X-directional wires through the first multiplexer and Selecting a first Y-directional wire from the plurality of Y-directional wires, thereby selecting all capacitor nodes corresponding to the first Y-directional wires and forming the first capacitive node set; and a second multiplex selector coupled Between the touch panel and the detection module, the second multiplexer is electrically connected to the plurality of X-directional wires of the touch panel and the plurality of Y-directional wires, and the selection module transmits the The second multiplexer grounds or vacates the plurality of X-directional wires and selects a second Y-directional wire from the plurality of Y-directional wires, thereby selecting all capacitor nodes corresponding to the second Y-directional wires and forming The second set of capacitance nodes. The touch input device of claim 1, wherein the detection module returns the signal according to one of the detected pulse signals input to the first capacitive node set, thereby determining the first capacitance. The touch detection state of the node set, wherein the signal feedback corresponds to a change in capacitance value of one of the first capacitive node sets. A touch input device includes: a touch panel, comprising: a plurality of capacitor nodes formed and distributed on the touch panel; a selection module, and the plurality of capacitor nodes of the touch panel Connecting, the selection module selects a first capacitive node set and a second capacitive node set adjacent to the first capacitive node set in the plurality of capacitive nodes; and a first detecting module, and the selecting The first module is configured to generate a first detection pulse signal, and the first detection pulse signal is input to the first capacitance node through the selection module. The first detection module determines a first touch detection state of the first capacitive node set according to the first detection pulse signal input to the first capacitive node set; and a second detection The second detection module includes a second signal generator for generating a second detection pulse signal, wherein the second detection pulse signal and the first The second detecting pulse wave signal is input to the second capacitive node set through the selection module, and the second detecting module is input to the second capacitive node set according to the opposite phase of the detected pulse wave signal. The second detecting pulse signal determines the second Receiving a second set of nodes, one touch detection state, wherein the first detection pulse signal and the second detection pulse signal with each other to reduce the electromagnetic interference caused. The touch input device of claim 9, wherein the touch panel is a projected capacitive touch panel. The touch input device of claim 9, wherein the touch panel comprises a plurality of X-directional wires and a plurality of Y-directional wires, and the plurality of X-directional wires and the plurality of Y-directional wires are arranged one another. In the form of a grid, each of the plurality of capacitor nodes is formed corresponding to one of the X-directional wires and one of the Y-directional wires. The touch input device of claim 11, wherein the selection module comprises: a first multiplexer coupled to the touch panel and the detection module, the first plurality The plurality of X-directional wires and the plurality of Y-directional wires of the touch panel are electrically connected to the plurality of Y-directional wires, and the selection module selects one of the X directions from the plurality of X-directional wires through the first multiplex selector And selecting one of the Y-directional wires from the plurality of Y-directional wires, thereby selecting one of the capacitor nodes from the plurality of capacitive nodes of the touch panel to form the first capacitive node set; and a second multiplexing option The second multiplexer is electrically connected to the plurality of X-directional wires of the touch panel and the plurality of Y-directional wires, and the selection is electrically connected between the touch panel and the detecting module. The module selects one of the X-directional wires from the plurality of X-directional wires through the second multiplexer and selects one of the Y-directional wires from the plurality of Y-directional wires, thereby the plurality of capacitors from the touch panel node Take one node capacitance to form a set of the second capacitor node. The touch input device of claim 11, wherein the selection module comprises: a first multiplexer coupled to the touch panel and the detection module, the first plurality The plurality of X-directional wires and the plurality of Y-directional wires are electrically connected to the touch panel, and the selection module selects at least one X direction from the plurality of X-directional wires through the first multiplex selector. And selecting at least one Y-directional wire from the plurality of Y-directional wires, thereby taking the complex from the touch panel Selecting at least one of the plurality of capacitive nodes to form the first set of capacitive nodes; and a second multiplexer coupled between the touch panel and the detecting module, the second multiplexing option The plurality of X-directional wires of the touch panel and the plurality of Y-directional wires are electrically connected to the touch panel, and the selection module selects at least one X-directional wire from the plurality of X-directional wires through the second multiplexer and Selecting at least one Y-directional wire from the plurality of Y-directional wires, thereby selecting at least one capacitive node from the plurality of capacitive nodes of the touch panel to form the second capacitive node set. The touch input device of claim 11, wherein the selection module comprises: a first multiplexer coupled to the touch panel and the detection module, the first plurality The plurality of X-directional wires and the plurality of Y-directional wires of the touch panel are electrically connected to the plurality of Y-directional wires, and the selection module selects a first X from the plurality of X-directional wires through the first multiplex selector. Directional wires and grounding or emptying the plurality of Y-directional wires, thereby selecting all capacitive nodes corresponding to the first X-directional wires and forming the first capacitive node set; and a second multiplex selector coupled Between the touch panel and the detection module, the second multiplexer is electrically connected to the plurality of X-directional wires of the touch panel and the plurality of Y-directional wires, and the selection module transmits the The second multiplexer selects a second X-directional wire from the plurality of X-directional wires and grounds or vacates the plurality of Y-directional wires, thereby selecting all capacitor nodes corresponding to the second X-directional wires and forming The second set of capacitance nodes. The touch input device of claim 11, wherein the selection module comprises: a first multiplexer coupled to the touch panel and the detection module, the first plurality The plurality of X-directional wires and the plurality of Y-directional wires of the touch panel are electrically connected to the plurality of Y-directional wires, and the selection module grounds or vacates the plurality of X-directional wires through the first multiplexer and Selecting a first Y-directional wire from the plurality of Y-directional wires, thereby selecting all capacitor nodes corresponding to the first Y-directional wires and forming the first capacitive node set; and a second multiplex selector coupled Between the touch panel and the detection module, the second multiplexer is electrically connected to the plurality of X-directional wires of the touch panel and the plurality of Y-directional wires, and the selection module transmits the The second multiplexer grounds or vacates the plurality of X-directional wires and selects a second Y-directional wire from the plurality of Y-directional wires, thereby selecting all capacitor nodes corresponding to the second Y-directional wires and forming The second set of capacitance nodes. The touch input device of claim 9, wherein the first detection module is configured to respond according to one of the first detected pulse signals input to the first capacitive node set, thereby determining The first touch detection state of the first capacitive node set, wherein the signal feedback corresponds to a change in capacitance value of one of the first capacitive node sets. The touch input device of claim 9, wherein the second detection module is configured to respond according to one of the second detected pulse signals input to the second capacitive node set, thereby determining The second capacitive sensing state of the second capacitive node is set, wherein the signal feedback corresponds to a change in capacitance value of one of the second capacitive node sets.