TW201510813A - Touch system and control method thereof - Google Patents

Abstract

A touch system is disclosed to include a sensing touch panel, a first control module and a second control module. The sensing touch panel includes a plurality of sensing channels, and each sensing channel includes a plurality of conductive units coupled to each other, wherein a connection of every two conductive units forms a sensing point. The first control module is coupled to the plurality of sensing channels, and includes a stable-voltage control module and a ground control module, wherein each the sensing channel has one terminal coupled to the stable-voltage control module and another terminal coupled to the ground control module. The second control module is coupled to a plurality of sensing points, and receives a plurality of sensing signals of the plurality of sensing points, to calculate at least a touch coordinate corresponding to the sensing touch panel according to the plurality of sensing signals. Also, a control method for the touch system is disclosed.

Description

Touch system and control method thereof

The present invention relates to the field of touch technologies, and in particular, to a touch system and a control method thereof.

In today's market for consumer electronics products, portable electronic products such as personal digital assistants (PDAs), mobile phones, notebooks, and tablet PCs have been widely used. The touch panel is used as an interface tool for data communication. In addition, since the design of electronic products is in the direction of lightness and thinness, it is hoped that the traditional input devices such as keyboards and mice can be omitted in the design of products, especially driven by the demand for tablet computers with humanized design. Touch panels have become a key component.

At present, the mainstream touch display panel, because Indium Tin Oxide (ITO) has good transmittance and conductivity, ITO is often used as a material for the touch electrode thereof, for example, US Patent Publication No. US 2011/0254803 The touch display panel disclosed in A1 can be further simplified to the touch system 10 shown in FIG. The simplified touch system 10 includes touch electrodes of the two-layer planes P1 and P2, and the touch electrodes of each plane can be regarded as a plurality of equivalent resistance units connected in series, for example, the plane P1 includes an equivalent resistance. The cells D1, D2, and the plane P2 contain equivalent resistance units D3, D4. When the user touches the touch display panel, the touch electrodes of the double-layer planes P1 and P2 are coupled to the equivalent resistance units D1, D2, and D3 by another equivalent resistance unit D5 because of the user's touch. , D4. In this case, the touch display panel utilizes a control module and a plurality of transmission lines to detect the change in resistance between the equivalent resistance units D1, D2, D3, D4, and D5 after coupling, to determine the user's touch. Control coordinates, such as a touch point C shown in Figure 1.

The signal processing method of the touch display panel is complicated, and the touch scanning is required. The electrode, that is, a single on-time can only obtain a single signal, and after multiple scans in sequence, the position report point can be obtained, so that the system processes the signal efficiency is relatively low.

In view of this, the present invention provides a touch system and a control method thereof to improve signal processing efficiency of a touch system.

The invention discloses a touch control system, comprising: an inductive touch panel, the inductive touch panel comprises a plurality of sensing channels, and each sensing channel comprises a plurality of conductor units connected in series with each other, wherein each two conductors A first control module is coupled to the plurality of sensing channels, and includes a voltage stabilization control module and a ground control module, and one end of each sensing channel is coupled The second control module is coupled to the plurality of inductive contacts for receiving the plurality of inductive contacts, and the second control module is coupled to the plurality of inductive contacts And sensing at least one touch coordinate corresponding to the sensing touch panel according to the plurality of sensing signals.

In one embodiment, the voltage regulator control module includes a plurality of voltage regulator switch units; and the ground control module includes a plurality of ground switch units; wherein one end of each of the sensing channels is coupled to the stable The switch unit is coupled to the ground switch unit.

In one embodiment, the first control module further includes a frequency controller coupled to the first control module, and the sensing channels are sequentially coupled to the respective voltage regulators corresponding to the sensing channels. a switch unit and each of the ground switch units.

In one embodiment, the second control module includes: a plurality of inductive switch units, wherein each of the inductive switch units is coupled to one of the sensing contacts of each of the sensing channels through a plurality of transmission lines; and the plurality of comparison units The plurality of inductive switching units are coupled to receive the sensing signals of the sensing contacts, and compare the sensing signals with a threshold to generate a comparison result; A processing unit is coupled to the comparison unit for receiving the comparison result, and further calculating the touch coordinate corresponding to the inductive touch panel according to the comparison result.

In one embodiment, the comparison unit includes: a first input end coupled to the inductive switch unit for receiving an inductive signal of the inductive contact; and a second input end for receiving the threshold; And an output for outputting the comparison result to the processing unit.

In one embodiment, the threshold values are voltage values corresponding to the sensing contacts when the sensing touch panel is not touched.

In one of the embodiments, the resistance values of the conductor units are equal in magnitude.

The present invention also discloses a control method for the touch system, comprising the steps of: a) the first control module generates a control signal, and one end of the sensing channels is electrically connected to the voltage stabilization control module, and the other end is The ground control module is turned on, the sensing nodes of the sensing channels generate a plurality of sensing signals; b) the second control module receives the sensing signals, and generates a plurality of comparison results according to the sensing signals; c) The second control module calculates at least one touch coordinate corresponding to the inductive touch panel according to the comparison results.

In one embodiment, the step a) includes the sensing channels being sequentially coupled between the voltage stabilizing control module and the ground control.

In one embodiment, the step b) includes comparing the sensing signals to a preset threshold value and generating a plurality of comparison results.

In one embodiment, the threshold values are voltage values corresponding to the sensing contacts when the sensing touch panel is not touched.

In one embodiment, the comparison results are the difference between the sensing signals and the threshold values.

In one embodiment, the method further includes the steps of: establishing an inductive signal lookup table according to the threshold values, and the step b) includes comparing the inductive signals with the inductive signal lookup table, and generating The comparison results.

In one of the embodiments, the resistance values of the conductor units are equal in magnitude.

In the present invention, the inductive touch panel includes a plurality of sensing channels, each sensing channel includes a plurality of conductor units connected in series with each other, wherein each of the two conductor units is formed in series to form an inductive contact to generate a plurality of inductive signals. The second control module receives, thereby improving the signal processing efficiency of the touch system.

10, 20‧‧‧ touch system

200‧‧‧Inductive touchpad

2020‧‧‧ Voltage Control Module

2022‧‧‧Ground control module

204‧‧‧Second control module

2040‧‧‧Processing unit

30‧‧‧ transmission line

60‧‧‧Control method

600, 602, 604, 606, 608‧ ‧ steps

C‧‧‧ touch points

D1, D2, D3, D4, D5‧‧‧ equivalent resistance unit

C_1~C_N‧‧‧Compare unit

GND‧‧‧ ground voltage

CH_1~CH_M‧‧‧ Sensing channel

L1, L2, L3‧‧‧ linear curve

P1, P2‧‧‧ plane

P1_1~P1_N,...PX_1~PX_N,...,PM_1~PM_N‧‧‧Inductive contacts

E‧‧‧conductor unit

SW_V1~SW_VM‧‧‧Regulator Switch Unit

SW_G1~SW_GM‧‧‧ ground switch unit

SW_S1~SW_SN‧‧‧Induction switch unit

TB1, TB2‧‧‧ induction signal lookup table

VDD‧‧‧Stable voltage

FIG. 1 is a schematic diagram of a touch control system of the prior art.

FIG. 2 is a schematic diagram of a touch system according to an embodiment of the present invention.

FIG. 3A is a schematic diagram of a linear curve without touch according to an embodiment of the present invention.

FIG. 3B is a schematic diagram of a linear curve that has been touched according to an embodiment of the present invention.

FIG. 4 is a schematic diagram of an untouched inductive signal lookup table according to an embodiment of the present invention.

FIG. 5 is a schematic diagram of an inductive signal lookup table that has been touched according to an embodiment of the present invention.

FIG. 6 is a flowchart of a control method according to Embodiment 1 of the present invention.

Certain vocabularies are used in the specification and in the request to refer to specific components. It should be understood by those of ordinary skill in the art that manufacturers may refer to the same elements by different nouns. This specification and the request book do not use the difference of the names as the means for distinguishing the elements, but the differences in the functions of the elements as the basis for the difference. The term "including" as used throughout the specification and the request form is an open term and should be interpreted as "including but not limited to". In addition, the term "electrical connection" is used herein to include any direct and indirect electrical connection. Therefore, if a first device is electrically connected or coupled to a second device, it means that the first device can be directly connected to the second device, or indirectly connected to the second device by other devices or connection means. Device.

Please refer to FIG. 2 , which is a schematic diagram of a touch system 20 according to an embodiment of the present invention. As shown in FIG. 2 , the touch control system 20 includes an inductive touch panel 200 , a first control module (not labeled), and a second control module 204 . The inductive touch panel 200 is coupled to the first control module and the second control module 204 respectively. The sensing touch panel 200 generates a plurality of sensing signals at a single conduction time by the control of the first control module, and the second control module 204 simultaneously receives the plurality of sensing signals to determine the user according to the plurality of sensing signals. Whether the touch system 20 is touched or not, and then one or more touch coordinates corresponding to the touch panel 200 are determined.

In detail, the inductive touch panel 200 includes a plurality of sensing channels CH_1~CH_M, and each sensing channel includes a plurality of conductor units E connected in series with each other. A plurality of sensing channels CH_1~CH_M are arranged in parallel with each other in the same direction. For example, a plurality of sensing channels CH_1~CH_M are arranged parallel to each other along the X coordinate direction, and a plurality of conductor units E on each sensing channel are connected in series along the Y coordinate direction. And the plurality of conductor units E of each sensing channel are the same. In this embodiment, each conductor unit E is a varistor, and the material thereof may be selected from the group consisting of indium tin oxide, zinc oxide, antimony oxide, antimony oxide, manganese oxide, and the like. An inductive contact is formed at the tandem of each two conductor units E, and a plurality of inductive contacts are formed on each of the sensing channels. For example, the sensing channel CH_1 includes (N+1) conductor units E connected in series, and (N+1) conductor units E are connected in series to form inductive contacts P1_1~P1_N, sensing channels. CH_2 includes sensing contacts P2_1~P2_N, ..., and sensing channel CH_M includes sensing contacts PM_1~PM_N, etc., so that a plurality of conductor elements E on the sensing touch panel 200 form an M×(N+1) The matrix.

The first control module includes a voltage stabilization control module 2020 and a ground terminal control module 2022. The voltage regulator control module 2020 includes M voltage regulator switch units SW_V1~SW_VM, each voltage regulator switch unit includes two ends, one end is coupled to a stable voltage VDD, and the other end is coupled to a plurality of sensing channels CH_1 One of ~CH_M. The ground control module 2022 includes M ground switch units SW_G1~SW_GM, and each ground switch unit includes two ends, one end is coupled to a ground voltage GND, and the other end is coupled to a plurality of sensing channels CH_1. One of ~CH_M.

In addition, the first control module may further include a frequency controller (not shown), so that each The sensing channels CH_1~CH_M are sequentially coupled to their respective voltage regulating switch units SW_V1~SW_VM and the respective ground end switching units SW_G1~SW_GM. For example, during the first on-time, the frequency controller generates a control signal, and only the regulated switching unit SW_V1 and the corresponding grounding switch unit SW_G1 are turned on, that is, only the conduction sensing channel CH_1 is connected to the stable voltage VDD and the ground end. Between the voltages GND; during the second on-time, the frequency controller generates a control signal, and only the regulated switching unit SW_V2 and the corresponding ground switching unit SW_G2 are turned on, that is, only the conduction sensing channel CH_2 is connected to the stable voltage VDD and the ground. Between the terminal voltages GND; in this manner, under the control of the frequency controller, the sensing channels CH_1~CH_M are sequentially turned on between the stable voltage VDD and the ground terminal voltage GND.

The second control module 204 includes a plurality of sensing switch units SW_S1 SWSW_SN, a plurality of comparison units C_1 C C_N, and a processing unit 2040. Each of the sensing switch units is coupled to one of the sensing contacts of each of the sensing channels through a plurality of transmission lines 30. In this embodiment, for example, the sensing switch unit SW_S1 is coupled to the sensing node P1_1 on the sensing channel CH_1 through the plurality of transmission lines 30, the sensing nodes P2_1, ... on the sensing channel CH_2, and the sensing on the sensing channel CH_M. Node PM_1. The sensing switch unit SW_S2 is coupled to the sensing node P1_2 on the sensing channel CH_1 through the plurality of transmission lines 30, the sensing node P2_2, ... on the sensing channel CH_2, and the sensing node PM_2 on the sensing channel CH_M, thereby implementing each sensing switch. The unit is coupled to one of the sensing contacts of each of the sensing channels through a plurality of transmission lines 30.

For example, in a first conduction time, only the sensing channel CH_1 is coupled between the stable voltage VDD and the ground voltage GND. Accordingly, the plurality of sensing contacts P1_1~P1_N on the sensing channel CH_1 are respectively The plurality of transmission lines 30 are coupled to the corresponding inductive switch units SW_S1 to SW_SN. For example, the inductive contact P1_1 is coupled to the inductive switch unit SW_S1, . . . , the inductive contact P1_N is coupled to the inductive switch unit SW_SN. The plurality of sensing signals of the plurality of sensing contacts P1_1~P1_N on the sensing channel CH_1 are transmitted to the sensing switch units SW_S1~SW_SN, and then the first conduction time is ended. Then, the sensing channel CH_2 is coupled between the stable voltage VDD and the ground voltage GND during the second conduction time after the first conduction time. And continuing the above-mentioned operation mode, the plurality of inductive contacts P2_1~P2_N on the sensing channel CH_2 are coupled to the corresponding inductive switching units SW_S1~SW_SN through a plurality of transmission lines 30, for example, the inductive contact P2_1 is coupled to the sensing The switch unit SW_S1,..., the inductive contact P2_N is coupled to the inductive switch unit SW_SN, and further transmits a plurality of inductive signals of the plurality of inductive contacts P2_1~P2_N on the sensing channel CH_2 to the inductive switch units SW_S1~SW_SN, according to which Through the frequency controller, the sensing channels CH_1~CH_M are sequentially turned on, and a total of M on-times are performed to complete the conduction of the sensing channels CH_1~CH_M to obtain a plurality of sensings of the plurality of sensing contacts on the sensing channels CH_1~CH_M, respectively. Signal.

Furthermore, each comparison unit includes a first input terminal, a second input terminal, and an output terminal, and the plurality of comparison units C_1 C C_N are respectively coupled to the corresponding inductive switch units SW_S1 SW SW_SN through respective first input terminals, Corresponding to receiving a plurality of sensing signals corresponding to the sensing contacts on the plurality of sensing channels CH_1~CH_M, for example, in the first conducting time, the comparing units C_1~C_N are coupled to the corresponding sensing switch units SW_S1 through the respective first input ends. The SW_SN receives the sensing signals of the sensing nodes P1_1~P1_N on the sensing channel CH_1. In the second conducting time, the comparing units C_1~C_N are coupled to the corresponding sensing switch units SW_S1~SW_SN through the respective first input terminals to receive The sensing signals of the sensing nodes P2_1~P2_N are detected on the sensing channel CH_2, and the comparing units C_1~C_N receive the plurality of sensing signals of the corresponding sensing contacts on the sensing channels CH_1~CH_M in sequence during the M-times. The second input terminals of the plurality of comparison units C_1~C_N are respectively coupled with threshold values V_1~V_N, so that each comparison unit can compare the received sensing signals with the corresponding threshold value, within a certain on time. Corresponding to the output of each comparison unit produces a comparison result. The processing unit 2040 is coupled to the output ends of the comparison units C_1 C C_N for receiving a plurality of comparison results, and further calculating a touch coordinate corresponding to the inductive touch panel 20 according to the comparison result. For example, in a first conduction time, the frequency controller of the first control module turns on the sensing channel CH_1 even if the sensing channel CH_1 is coupled between the stable voltage VDD and the ground voltage GND, and the complex number on the sensing channel CH_1 The sensing contacts P1_1~P1_N are respectively coupled to the corresponding sensing switch units SW_S1~SW_SN through the corresponding transmission line 30, that is, the sensing The contact P1_1 is coupled to the inductive switch unit SW_S1, the inductive contact P1_2 is coupled to the inductive switch unit SW_S2, ..., the inductive contact P1_N is coupled to the inductive switch unit SW_SN, and the further comparison unit C_1 receives the sensing through the inductive switch unit SW_S1 The sensing signal of the sensing contact P1_1 is detected on the channel CH_1, the comparison unit C_2 receives the sensing signal of the sensing contact P1_2 on the sensing channel CH_1 through the sensing switch unit SW_S2, ..., the comparison unit C_N receives the sensing on the sensing channel CH_1 through the sensing switching unit SW_SN The sensing signals of the contacts P1_N are respectively compared with the magnitudes of the sensing signals and the corresponding threshold values, thereby generating a plurality of comparison results corresponding to the sensing channels CH_1, and in other conduction times, the comparing units C_1~C_N will also be similar. The comparison operation, in turn, generates a plurality of comparison results corresponding to different sensing channels and transmits them to the processing unit 2040. Briefly, the X coordinate value of the inductive touch panel 200 can be obtained according to the first control module turning on different sensing channels in different on-times; the second control module 204 receiving an induction in different on-times. a plurality of sensing signals of the plurality of sensing contacts on the channel to compare the size of each sensing signal with a corresponding threshold value, thereby generating a plurality of comparison results, so that the processing unit 2040 generates corresponding to the sensing touch according to the plurality of comparison results. The Y coordinate value of the board 200. In this embodiment, the processing unit 2040 is implemented by a digital signal processing (DSP) unit to generate a touch coordinate corresponding to the touch panel 200.

In addition, in this embodiment, the plurality of comparison units C_1 C C_N corresponding to the threshold values V_1 V V_N received by the second input terminal can be represented by a linear curve. Please refer to FIG. 3A and FIG. 3B . FIG. 3A is a schematic diagram of a linear curve without touch according to an embodiment of the present invention, and FIG. 3B is a schematic diagram of a linear curve of a touch control according to an embodiment of the present invention. As shown in FIG. 3A, it is assumed that the touch system 20 turns on the sensing channel CH_1 during a first on time, and the user does not press the inductive touch panel 200. In this case, the plurality of cells C_1~C_N are compared. Each critical value received by the two inputs can be passed through a straight line equation Here, the symbol V represents the voltage difference between the voltage regulator control module and the ground control module, (N+1) represents the number of conductor units included in the sensing channel, and the symbol n represents a certain sensing node and ground. The number of conductor units between the control modules, the symbol R is the resistance of the conductor unit E (in the present embodiment, the resistance of the conductor unit is defined as R), and Q is the first of the comparison units corresponding to the sensing node. The value of the inductive signal received at the input. When the sensing touch panel is not touched, the sensing signal value is also a critical value received by the second input end of the comparing unit corresponding to the sensing node. Then, the voltage difference V is equally divided into a plurality of equally divided induced voltage values by a plurality of conductor elements of each sensing channel. That is, the cross-pressure corresponding to each conductor unit, then the number n of conductor units and the aliquoting induced voltage value between a certain sensing node and the ground control module The product of the product is the threshold value received by the second input of the comparison unit corresponding to the sensing node. For example, the number of conductor units between the sensing node P1_N and the ground control module is 1, that is, n=1, and the threshold value received by the first input of the comparison unit C_N is Similarly, the threshold value received by the first input terminal of the comparison unit C_(N-1) corresponding to the sensing node P1_(N-1) is ,..., the threshold value received by the first input of the comparison unit C_1 corresponding to the sensing node P1_1 is . Accordingly, the processing unit will pre-store the linear curve L1 shown in FIG. 3A as a reference for subsequent comparison. Referring to FIG. 2 and FIG. 3B, in the first conduction time, the sensing channel CH_1 is coupled between the voltage stabilization control module 2020 and the ground control module 2022, and the plurality of sensing contacts P1_1 on the sensing channel CH_1. ~P1_N is respectively coupled to the corresponding inductive switch unit SW_S1~SW_SN through the corresponding transmission line 30, when the user presses the inductive touch panel 200, and the touch position is just close to the plurality of inductive contacts P1_1~P1_N on the sensing channel CH_1 In one case, the comparison units C_1~C_N will receive a plurality of sensing signals from the sensing switch units SW_S1~SW_SN, which can also be represented by the following linear equations, ie Where ΔR is the change in the resistance value of the conductor unit E due to the contact pressure. Compared with the untouched linear curve L1, the induced signal of the linear curve L2 is different from the touch point n. In other words, the comparison unit will compare the Q value difference corresponding to the linear curve L1 and the linear curve L2 on the same n value. If a difference value as shown in FIG. 3B is generated, the processing unit 2040 can determine that the user touches The Y coordinate of the inductive contact is controlled, and the first control module records the X-coordinate of the inductive contact touched by the user at the time, and obtains the inductive contact relative to the inductive touch panel 200. Touch coordinates.

In the embodiment, the touch control system 20 can pre-store at least the linear curve L1 and the linear curve L2 by using the processing unit 2040 to determine whether the sensing channel that is turned on in different conduction times generates a difference of Q values at each sensing contact. And determining the Y coordinate of the sensing contact touched by the user, and the X coordinate of the touch point is obtained by the conductive sensing channel recorded by the first control module, thereby obtaining the touch on the sensing touch panel 200. coordinate. Of course, those skilled in the art can also store a plurality of sensing signals corresponding to a plurality of sensing contacts on a plurality of sensing channels as a plurality of matrix elements of an M×N matrix, thereby establishing a corresponding sensing trackpad. Coordinate signal lookup table for coordinates. Please refer to FIG. 4 and FIG. 5 , FIG. 4 is a schematic diagram of an untouched inductive signal lookup table according to an embodiment of the present invention, and FIG. 5 is a schematic diagram of an already touched inductive signal lookup table according to an embodiment of the present invention; . Referring to FIG. 2 and FIG. 4, after the touch system 20 sequentially completes the conduction operation of all the sensing channels CH_1~CH_M (that is, after M times of ON time), the processing unit 2040 further includes a storage unit (not shown). Corresponding to the plurality of inductive signals storing different on-times and different inductive contacts on different sensing channels, the plurality of inductive signals are plural thresholds when no touch is applied. As shown in FIG. 4, the first column sensing channel CH_1 of the untouched inductive signal lookup table TB1 has the measured voltage value of the first inductive contact closest to the ground terminal voltage GND. (ie, the cross-pressure corresponding to a conductor unit), and sequentially increase to ,..., ,..., The inductive signals of other sensing channels can be pushed in this way. If the user has the touch-sensitive touch panel 200 and the touch position is in the sensing channel CH_3, the third column sensing channel CH_3 of the touched sensing signal lookup table TB2 as shown in FIG. 5 is closest to the ground terminal voltage. The first sense contact of GND also has the same voltage value. And sequentially increase to ,..., ,..., . The inductive signal starts from the touch point n and the difference is According to this, the processing unit 2040 can convert the relative position of the inductive signal lookup table TB2 into the touch coordinates on the inductive touch panel 200 through a standard scaling operation, and complete the related operations of the touch coordinates. For example, comparing the inductive signal lookup tables in FIGS. 4 and 5, it can be seen that the abscissa of the touch point is 3 and the ordinate is n.

In the present invention, the control method 60 applicable to the touch system 20 can be referred to FIG. 6 and includes the following steps: Step 600: Start.

Step 602: The first control module generates a control signal, so that one end of the sensing channels is electrically connected to the voltage stabilization control module, and the other end is electrically connected to the ground control module, and the sensing nodes of the sensing channels are Generate a plurality of sensing signals.

Step 604: The second control module receives the sensing signals, and generates a plurality of comparison results according to the sensing signals.

Step 606: The second control module calculates at least one touch coordinate corresponding to the inductive touch panel according to the comparison results.

Step 608: End.

For detailed operations of each step in the control method 60, reference may be made to the foregoing embodiments and the related paragraphs of FIG. 2 to FIG. 5, and details are not described herein. Notably, the first control module further includes a frequency controller (not shown), and can synchronize the inductive switch units SW_S1 SWSW_SN, the comparison units C_1 C C_N, and the processing unit 2040 in the second control module 204. In this case, in step 602 and step 606, when the first control module generates a control signal to turn on one of the sensing channels CH_1~CH_M, the second control module 204 can also adaptively receive the turned-on sensing. a plurality of sensing signals of a plurality of sensing contacts on the channel, corresponding to storing a plurality of sensing signals The value of the matrix in the sense signal lookup table is further, and then the conduction of the sensing channels CH_1~CH_M is performed in sequence to be stored as a sensing signal lookup table, and then the processing unit 2040 determines whether a difference is generated, thereby generating a relative touch sensing. The touch coordinates of the board 200. Of course, those skilled in the art can also appropriately add other switching mechanisms and control signals, so that the first control module and the second control module 204 can cooperate with the M× formed by the plurality of conductor units on the touch panel 200. The matrix size of N+1), or the conduction condition of the sensing channels CH_1~CH_M can be appropriately adjusted according to the material characteristics of the inductive touch panel 200, which are all within the scope of the present invention.

Compared with the prior art, the touch system 20 provided in this embodiment is only applicable to the touch panel 200. The touch system 20 only needs to complete the conduction of the sensing channels CH_1~CH_M in sequence, and can determine the relative touch. The relative coordinates of the sensing coordinates of the control board 200 can be greatly reduced, and the scanning efficiency is greatly improved. In addition, those skilled in the art can also determine the number of conductor units included in the touch panel 200, and determine whether to turn on only the sensing channels CH_1~CH_M, or turn on the sensing channels CH_1~CH_M at intervals. The sensing signal lookup table of different number of rows/columns is established, thereby simplifying the processing efficiency or computing time of the processing unit 2040, etc., and is not intended to limit the scope of the present invention.

In summary, the touch control system and the control method thereof according to the embodiment of the present invention sequentially turn on a plurality of sensing channels on the sensing touch panel through the first control module and the second control module to different sensing times. The sensing signals of the plurality of sensing contacts formed by coupling the plurality of conductor units are respectively obtained, so that the second control module can determine whether a linear curve difference has been generated between the plurality of sensing signals, and the corresponding judgment is relative to Inductive touchpad touch coordinates. Compared with the prior art, the signal processing efficiency of the embodiment is high, and the double-layer planar touch electrodes can be avoided, and the effect of the touch system against noise is increased to increase the application range of the touch system.

The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

20‧‧‧ touch system

200‧‧‧Inductive touchpad

2020‧‧‧ Voltage Control Module

2022‧‧‧Ground control module

204‧‧‧Second control module

2040‧‧‧Processing unit

30‧‧‧ transmission line

C_1~C_N‧‧‧Compare unit

GND‧‧‧ ground voltage

CH_1~CH_M‧‧‧ Sensing channel

P1_1~P1_N,...PX_1~PX_N,...,PM_1~PM_N‧‧‧Inductive contacts

E‧‧‧conductor unit

SW_V1~SW_VM‧‧‧Regulator Switch Unit

SW_G1~SW_GM‧‧‧ ground switch unit

SW_S1~SW_SN‧‧‧Induction switch unit

VDD‧‧‧Stable voltage

Claims (14)

A touch control system includes: an inductive touch panel comprising a plurality of sensing channels, and each sensing channel includes a plurality of conductor units connected in series with each other, wherein each of the two conductor units forms an inductive connection in series a first control module coupled to the plurality of sensing channels, and comprising a voltage stabilizing control module and a ground end control module, wherein one end of each sensing channel is coupled to the voltage stabilizing control module, The other end is coupled to the ground control module; and a second control module is coupled to the plurality of inductive contacts for receiving a plurality of sensing signals of the plurality of inductive contacts, and according to the plurality of sensing signals The sensing signals calculate at least one touch coordinate corresponding to the sensing touch panel. The touch control system of claim 1, wherein the voltage stabilization control module comprises a plurality of voltage regulator switch units; and the ground control module comprises a plurality of ground switch units; wherein one end of each of the sensing channels The other end is coupled to the grounding switch unit. The touch control system of claim 2, wherein the first control module further includes a frequency controller coupled to the first control module, and the respective sensing channels are sequentially coupled to the sensing channel. Each of the voltage regulator switch units and each of the ground terminal switch units. The touch control system of claim 1, wherein the second control module comprises: a plurality of inductive switch units, wherein each of the inductive switch units is coupled to one of the inductive contacts of each of the sensing channels through a plurality of transmission lines a plurality of comparison units coupled to the plurality of inductive switching units for receiving the inductive signals of the inductive contacts, and comparing the inductive signals with a threshold to generate a comparison result; and a processing unit coupled The comparison unit is configured to receive the comparison result, and further calculate the touch coordinate corresponding to the inductive touch panel according to the comparison result. The touch control system of claim 4, wherein the comparison unit comprises: a first input end coupled to the inductive switch unit for receiving an inductive signal of the inductive contact; and a second input end for Receiving the threshold; and an output for outputting the comparison result to the processing unit. The touch system of claim 5, wherein the threshold values are voltage values corresponding to the sensing contacts when the touch panel is not touched. The touch system of claim 1, wherein the resistance values of the conductor units are equal. A control method for a touch system according to claim 1, comprising the steps of: a) the first control module generates a control signal, and one end of the sensing channels is electrically connected to the voltage stabilization control module, and the other end is The ground control module is turned on, the sensing nodes of the sensing channels generate a plurality of sensing signals; b) the second control module receives the sensing signals, and generates a plurality of comparison results according to the sensing signals; c) the The second control module calculates at least one touch coordinate corresponding to the inductive touch panel according to the comparison results. The control method of claim 8, wherein the step a) comprises the sensing channels being sequentially coupled between the voltage stabilizing control module and the ground control. The control method of claim 8, wherein the step b) comprises comparing the sensing signals with a preset threshold value and generating a plurality of comparison results. The control method of claim 10, wherein the threshold values are that the inductive touch panel is not touched The voltage values corresponding to the sensing contacts. The control method of claim 10, wherein the comparison result is a difference between the sensing signals and the threshold values. The control method of claim 10, further comprising the steps of: establishing an inductive signal lookup table according to the threshold values, and step b) comprising comparing the inductive signals with the inductive signal lookup table, and generating the comparison results. . The control method of claim 10, wherein the resistance values of the conductor units are equal in magnitude.