TWI700624B - Method for calculating center of touch area, touch system and touch device - Google Patents

Abstract

The present disclosure provides a method for calculating center of touch area including: step S1, dividing an effective touch area into a plurality of sub-touch areas, each of the sub-touch areas corresponding to a position information; step S2, acquiring touch sensing signals of each of the sub-touch areas of current time, and determining a sub-touch area corresponding to the touch sensing signals that meets the preset condition as the target sub-touch area; and step S3, calculating the center of the effective touch area of the current time according to the position information and the touch sensing signals corresponding to the target sub-touch areas. The method for calculating center of touch area provided by the disclosure can improve the touch precision. A touch system and a touch device are also provided.

Description

Touch control center calculation method, touch control system and touch control device

The present invention relates to the field of touch technology, in particular to a touch center calculation method, touch system and touch device.

Touch technology is closely related to the realization of functions of various smart devices (such as tablet computers, smart phones, etc.). One of the more widely used touch methods is capacitive touch.

The conventional capacitive touch technology divides the touch area into a plurality of sub-touch areas with the same shape and area to calculate the location of the current touch operation, so as to activate the corresponding function according to the touch operation. With the diversification of products on the market, smart devices with various touch area shapes have appeared. In these smart devices, the use of traditional touch technology will reduce the touch accuracy, especially when the touch area has irregular shapes. In some parts (such as the rounded corners), the touch is often misaligned, which affects the user experience.

One aspect of the present invention provides a touch center calculation method, including: step S1, dividing the effective touch area to form a plurality of sub-touch areas, each of the sub-touch areas corresponding to a position information; step S2, obtaining the current time Each of the sub-touch areas corresponds to the touch sensing signal, and the sub-touch area corresponding to the touch-sensing signal that meets the preset condition is determined as the target sub-touch area; step S3, according to each of the target sub-touch areas The position information of the touch area and the touch sensing signal corresponding to each of the target sub-touch areas are calculated to calculate the touch center at the current moment.

Another aspect of the present invention provides a touch control system, including: an area dividing module for dividing an effective touch area to form a plurality of sub touch areas, each of the sub touch areas corresponding to a position information; The target sub-touch area determining module is used to obtain the touch sensing signal corresponding to each of the sub-touch areas at the current moment, and determine the sub-touch area corresponding to the touch sensing signal that meets the preset condition as the target sub-touch area Touch area; a touch center calculation module for calculating the touch at the current moment based on the position information of each target sub-touch area and the touch sensing signal corresponding to each target sub-touch area center.

Another aspect of the present invention provides a touch device, which includes the touch system as described in any one of the above.

The touch center calculation method provided in this embodiment divides the effective touch area into a plurality of sub-touch areas, determines the sub-touch area that meets the preset conditions as the target sub-touch area, and refers to the touch corresponding to the target sub-touch area. Control the sensing signal and the geometric center coordinates of the target sub-touch area to calculate the touch center coordinates. Since the geometric center coordinates of the target sub-touch area are used in the above calculation process, it will not be affected by the difference between each target sub-touch area. Different shapes affect the calculation results of the touch center coordinates. Therefore, the touch center calculation method provided in this embodiment is especially suitable for smart devices with special-shaped touch screens (with special-shaped effective touch areas), and can effectively improve touch Accuracy.

S1, S2, S3, S21, S22, S23, S24, S25: steps

10: Touch device

11: cover

12: Touch electrode array

13: Touch control circuit

14: Effective touch area

141: Sub touch area

1411, 1412, 1413, 1414, 1415, 1416, 1417, 1418, 1419, 1420, 1421, 1422, 1423, 1424, 1425, 1426, 1427, 1428: target sub touch area

C1: Initial capacitance

C2: Sensing capacitor

S: area threshold

C0: signal threshold

(Xlabel, Ylabel): touch center coordinates

k: Number of target sub-touch areas

(x1, y1), (x2, y2), (x3, y3), (x4, y4), (x5, y5), (x6, y6), (x7, y7), (x8, y8), (x9 , Y9): geometric center coordinates

C21, C22, C23, C24, C25, C26, C27, C28, C29: touch sensing signal

20: Touch system

21: Area division module

22: Target sub touch area determination module

23: Touch Center Computing Module

221: first acquisition unit

222: Judgment Unit

223: The first determination unit

224: second acquisition unit

225: The second determination unit

FIG. 1 is a schematic flowchart of the touch center calculation method provided in the first embodiment.

2 is a schematic diagram of a cross-sectional module of a touch device according to an embodiment of the present invention.

FIG. 3 is a schematic plan view of the touch device in FIG. 2.

4 is another schematic plan view of the touch device in FIG. 2.

Fig. 5 is a detailed flowchart of step S2 in Fig. 1.

6 is a schematic diagram of the target sub-touch area at the current moment provided by the first embodiment.

FIG. 7 is a schematic flowchart of the different steps between the touch center calculation method provided in the second embodiment and the touch center calculation method provided in the first embodiment.

FIG. 8 is a schematic diagram of the target sub-touch area at the current moment provided by the second embodiment.

FIG. 9 is a schematic diagram of the structure of the touch system provided in the third embodiment.

FIG. 10 is a schematic diagram of the specific structure of the target sub-touch area determining module in FIG. 9.

11 is a schematic diagram of the specific structure of the target sub-touch area determining module in the fourth embodiment.

Example one

Please refer to FIG. 1. The touch center calculation method provided by this embodiment includes the following steps: step S1, dividing the effective touch area to form a plurality of sub-touch areas, each sub-touch area corresponding to a position information; step S2 , Acquire the touch sensing signal corresponding to each sub-touch area at the current moment, and determine the sub-touch area corresponding to the touch-sensing signal that meets the preset condition as the target sub-touch area; step S3, according to each target sub-touch area The position information of the touch area and the touch sensing signal corresponding to each target sub-touch area are used to calculate the touch center at the current moment.

The touch center calculation method provided in this embodiment is applicable to all kinds of touch devices (such as tablet computers, smart phones) with touch functions. The touch principle of the touch devices is not limited, and various types can be used. The touch principle, such as ultrasonic type (to obtain the touch position by detecting the change of ultrasonic wave), capacitive type (to obtain the touch position by detecting the change of the capacitance), etc. In this embodiment, the touch center calculation method is applied Take a smart phone with capacitive touch principle as an example.

Please refer to FIG. 2. FIG. 2 shows a part of the structure related to the touch function of the touch device 10 (smart phone in this embodiment), including: a cover 11, a touch electrode array disposed on one side of the cover 11 12, and a touch control circuit 13 electrically connected to the touch electrode array 12. Wherein, the touch electrode array 12 includes a plurality of touch electrodes (not shown). At a certain moment, a touch object (such as a human finger) performs a touch operation on the surface of the cover 11 away from the touch electrode array 12, and a capacitance is formed between the touch object and the touch electrode array.

Please refer to FIGS. 2 and 3 at the same time. The touch device 10 defines an effective touch area 14. The effective touch area 14 is all areas that can sense the touch operation of the touch object, and the effective touch area 14 is facing the touch The arrangement area of the electrode array 12. In this embodiment, the effective touch area 14 is the central area of the cover 11 of the touch device 10 facing the touch electrode array 12.

In step S1, the effective touch area 14 is divided to form a plurality of sub-touch areas 141. The plurality of sub-touch areas 141 are closely arranged in an array. The sum of the areas covered by all the sub-touch areas 141 is the effective touch area. The area of the control area 14. The shape and area of each sub-touch area 141 may be all the same, may be partly the same, or all may be different, depending on the shape of the effective touch area 14.

Please refer to FIG. 3, the effective touch area 14 is a roughly rectangle with arc-shaped corners and a concave part. It is divided into a plurality of sub-touch areas 141. The sub-touch areas 141 near the center area are regular rectangles, close to The child touch area 141 at the corner has an irregular shape.

Please refer to FIG. 4, in another embodiment, compared to the relatively regular area division method adopted in FIG. 3, the effective touch area 14 shown in FIG. 4 is divided into a completely irregular manner. The size and shape of the touch area 141 are completely different.

In other embodiments, when the effective touch area 14 is a regular rectangle, the effective touch area 14 can be divided into a plurality of sub-touch areas 141 of equal shape and size.

In this embodiment, for ease of understanding, the area division method shown in FIG. 3 is taken as an example for the following description. It should be understood that the area division method shown in the present disclosure is not intended to limit the present invention.

Each sub-touch area 141 faces a part of the touch electrode array 12, that is, corresponds to one or more touch electrodes. An initial capacitance C1 is formed between the part of each sub-touch area 141 facing the touch electrode array 12 and the ground. When the touch object performs a touch operation, a part of the touch electrode array 12 corresponding to the sub-touch area 141 touched by the touch object can generate an inductive capacitance C2 between the touch object.

Further, step S1 is specifically: setting an area threshold S, and dividing the effective touch area 14 to form a plurality of sub-touch areas 141 with an area larger than the area threshold S.

The touch device 10 has a signal recognition accuracy corresponding to its hardware configuration. If the area of the sub-touch area 141 is too small, the sensing capacitance C2 generated between the part of the touch electrode array 12 corresponding to each sub-touch area 141 and the touch object is too small As a result, it cannot be recognized or is more susceptible to environmental noise, resulting in reduced touch accuracy. Therefore, the area threshold S is set to limit the area of the sub-touch area 141. The specific value of the area threshold S is determined according to factors such as the hardware configuration of the touch device 10.

Each sub-touch area 141 corresponds to a piece of position information. In this embodiment, the position information corresponding to each sub-touch area 141 is the geometric center coordinates of each sub-touch area 141.

Step S2 is used to determine the target sub-touch area, and the target sub-touch area is the sub-touch area 141 that meets the preset condition.

Referring to FIG. 5, in this embodiment, step S2 specifically includes: step S21, obtaining the touch sensing signal corresponding to each sub-touch area at the current moment; step S22, setting a signal threshold, and judging which sub-touch area corresponds to Whether the touch sensing signal is greater than the signal threshold; In step S23, if the judgment is yes, the sub-touch area corresponding to the touch sensing signal greater than the signal threshold is determined as the target sub-touch area.

In step S21, the touch sensing signal corresponding to the sub-touch area 141 at the current moment is that when the touch object performs a touch operation at the current moment, the part of the touch electrode array 12 corresponding to each sub-touch area 141 and the touch Inductive capacitance C2 generated between control objects.

In step S22, a signal threshold C0 is set to determine whether the acquired touch sensing signal corresponding to each sub-touch area 141, that is, whether the sensing capacitor C2 is greater than the signal threshold C0. In step S23, the sub-touch area 141 corresponding to the touch sensing signal C2 determined to be greater than the signal threshold C0 is determined as the target sub-touch area. That is, in this embodiment, the preset condition is that the touch sensing signal C2 corresponding to the sub-touch area 141 is greater than the signal threshold C0.

At the current moment, when the touch object performs a touch operation, the size of the touch sensing signal corresponding to each sub-touch area 141 is different. In this embodiment, the larger touch sensing signal corresponds to the sub-touch area 141 Closer to the position where the touch object wants to touch at the current moment, the signal threshold C0 is set to determine the sub-touch area 141 corresponding to the larger touch sensing signal as the target sub-touch area. The subsequent calculation steps are Only for the target sub-touch area. The above steps not only achieve more targeted data calculation, but also reduce the amount of calculated data.

Step S3 is specifically: performing a weighted average on the geometric center coordinates of each target sub-touch area to obtain the current touch center coordinates. Wherein, the weight in the weighted average is the touch sensing signal corresponding to each target sub-touch area, and the weighted average includes weighted average of X coordinates and weighted average of Y coordinates. The touch center coordinates are the coordinates of the position where the touch object wants to touch at the current moment, and the touch center coordinates can be expressed as (Xlabel, Ylabel).

其中，k取大於等於1之整數，k為目標子觸控區域數量；

Xlabel=Xsum/Dsum；Ylabel=Ysum/Dsum。 The calculation process in the above step S3 can be expressed as:

Among them, k is an integer greater than or equal to 1, and k is the number of target sub-touch areas;

Xlabel = Xsum / Dsum ; Ylabel = Ysum / Dsum .

For the calculation process in step S3, specific numerical values are introduced as an example for illustration: Please refer to FIG. 6. In this embodiment, for example, the target sub touch areas 1411, 1412, 1413, 1414, 1415, 1416, 1417, 1418 and 1419. Take any point as the origin, any straight line passing through the origin as the X axis, and the line perpendicular to the X axis as the Y axis, establish a rectangular coordinate system on the plane of the sub touch area 141, and target the sub touch areas 1411, 1412 The geometric center coordinates of, 1413, 1414, 1415, 1416, 1417, 1418 and 1419 are expressed as (x1, y1), (x2, y2), (x3, y3), (x4, y4), (x5, y5) , (X6, y6), (x7, y7), (x8, y8) and (x9, y9); target sub touch areas 1411, 1412, 1413, 1414, 1415, 1416, 1417, 1418 and 1419 correspond to the touch The control sensing signals are represented as C21, C22, C23, C24, C25, C26, C27, C28, and C29.

Put the above data into the formula, and calculate the touch center coordinates (Xlabel, Ylabel) as: Xlabel=(x1*C21+x2*C22+x3*C23+x4*C24+x5*C25+x6*C26+x7* C27+x8*C28+x9*C29)/(C21+C22+C23+C24+C25+C26+C27+C28+C29)

Ylabel=(y1*C21+y2*C22+y3*C23+y4*C24+y5*C25+y6*C26+y7*C27+y8*C28+y9*C29)/(C21+C22+C23+C24+C25 +C26+C27+C28+C29)

In the method for calculating the touch center provided in this embodiment, the effective touch area 14 is divided into a plurality of sub-touch areas 141, and the sub-touch area 141 that meets a preset condition is determined as the target sub-touch area, while referring to the target sub-touch area The touch sensing signal corresponding to the area and the geometric center coordinates of the target sub-touch area are used to calculate the touch center coordinates. Because the geometric center coordinates of the target sub-touch area are used in the above calculation process, it will not be affected by each target sub-touch area. The shape of the touch area affects the calculation result of the touch center coordinates. Therefore, the touch center calculation method provided in this embodiment is especially suitable for smart devices with special-shaped touch screens (with special-shaped effective touch areas). Effectively improve touch accuracy.

Example two

Please refer to FIG. 7, the touch center calculation method provided by this embodiment is different from the first embodiment. Step S2 specifically includes: Step S24: Obtain the touch sensing signal corresponding to each of the sub-touch areas at the current moment ； Step S25, determining the sub-touch area corresponding to the largest touch sensing signal and the sub-touch area adjacent to the sub-touch area corresponding to the largest touch sensing signal as The target sub-touch area.

That is, the difference between this embodiment and the first embodiment is the preset condition for determining the target sub-touch area in step S2.

Please refer to FIG. 8. In this embodiment, for example, if the sub-touch area corresponding to the largest currently acquired touch sensing signal is 1420, then the sub-touch area 1420 is determined as the target sub-touch area 1420, and the target sub-touch area 1420 The sub touch areas 1421, 1422, 1423, 1424, 1425, 1426, 1427, and 1428 adjacent to the touch area 1420 are also determined as target sub touch areas.

In this embodiment, only the differences from the first embodiment are described in detail, and the same method steps will not be repeated here.

It should be understood that the touch center calculation method provided in this embodiment can achieve all the beneficial effects described in the first embodiment.

Example three

Referring to FIG. 9, the touch system 20 provided by this embodiment includes: an area dividing module 21 for dividing the effective touch area of the touch device to form a plurality of sub-touch areas, and each sub-touch area corresponds to a Location information; the target sub-touch area determining module 22 is used to obtain the touch sensing signal corresponding to each sub-touch area at the current moment, and determine the sub-touch area corresponding to the touch sensing signal that meets the preset condition as The target sub-touch area; the touch center calculation module 23 is used to calculate the touch center at the current moment according to the position information of each target sub-touch area and the touch sensing signal corresponding to each target sub-touch area.

The touch system 20 provided in this embodiment is applicable to various touch devices (such as tablet computers and smart phones) with touch functions. The touch principle of the touch devices is not limited, and various touch devices can be used. Control principles, such as ultrasonic type (to obtain the touch position by detecting the change of ultrasonic wave), capacitive type (to obtain the touch position by detecting the change of the capacitance), etc. In this embodiment, the touch system 20 is applied to FIG. Take a smartphone with capacitive touch principle as an example in 2 for illustration.

Referring to FIG. 3 again, the area dividing module 21 is used to divide the effective touch area 14 to form a plurality of sub-touch areas 141. The plurality of sub-touch areas 141 are closely arranged in an array, and all the sub-touch areas 141 cover The sum of the area is the area of the effective touch area 14. Of each sub-touch area 141 The shape and area may all be the same, some of them may be the same, or all may be different, depending on the shape of the effective touch area 14. In this embodiment, the effective touch area 14 is a roughly rectangle with arc-shaped corners, which is divided into a plurality of sub-touch areas 141, the sub-touch areas 141 near the center area are regular rectangles, and the sub-touch areas 141 near the corners It is an irregular shape. In other embodiments, when the effective touch area 14 is a regular rectangle, the effective touch area 14 can be divided into a plurality of sub-touch areas 141 of equal shape and size.

Each sub-touch area 141 faces a part of the touch electrode array 12. An initial capacitance C1 is formed between the part of each sub-touch area 141 facing the touch electrode array 12 and the ground. When the touch object performs a touch operation, a part of the touch electrode array 12 corresponding to the sub-touch area 141 touched by the touch object can generate an inductive capacitance C2 between the touch object.

Further, step S1 is specifically: setting an area threshold S, and dividing the effective touch area 14 to form a plurality of sub-touch areas 141 with an area larger than the area threshold S.

The touch device 10 has a signal recognition accuracy corresponding to its hardware configuration. If the area of the sub-touch area 141 is too small, the sensing capacitance C2 generated between the part of the touch electrode array 12 corresponding to each sub-touch area 141 and the touch object is too small As a result, it cannot be recognized or is more susceptible to environmental noise, resulting in reduced touch accuracy. Therefore, the area threshold S is set to limit the area of the sub-touch area 141. The specific value of the area threshold S is determined according to factors such as the hardware configuration of the touch device 10.

Each sub-touch area 141 corresponds to a piece of position information. In this embodiment, the position information corresponding to each sub-touch area 141 is the geometric center coordinates of each sub-touch area 141.

Step S2 is used to determine the target sub-touch area, and the target sub-touch area is the sub-touch area 141 that meets the preset condition.

Referring to FIG. 10, in this embodiment, the target sub-touch area determining module 22 specifically includes: a first obtaining unit 221 for obtaining touch sensing signals corresponding to each sub-touch area at the current moment; and a determining unit 222 for A signal threshold is set to determine whether the touch sensing signal corresponding to each sub-touch area is greater than the signal threshold; the first determining unit 223 is configured to correspond to the touch sensing signal greater than the signal threshold if the determination is yes The child touch area is determined as the target child touch area.

In the first acquisition unit 221, the touch sensing signal corresponding to the sub-touch area 141 at the current moment is the part of the touch electrode array corresponding to each sub-touch area 141 when the touch object performs a touch operation at the current moment 12 Inductive capacitance C2 generated between the touch object.

The determining unit 222 is used to set a signal threshold C0 to determine whether the acquired touch sensing signal corresponding to each sub-touch area 141, that is, whether the sensing capacitor C2 is greater than the signal threshold C0. The first determining unit 223 is configured to determine the sub-touch area 141 corresponding to the touch sensing signal determined to be greater than the signal threshold C0 as the target sub-touch area. That is, in this embodiment, the preset condition is that the touch sensing signal corresponding to the sub-touch area 141 is greater than the signal threshold C0.

At the current moment, when the touch object performs a touch operation, the size of the touch sensing signal corresponding to each sub-touch area 141 is different. In this embodiment, the larger touch sensing signal corresponds to the sub-touch area 141 Closer to the position where the touch object wants to touch at the current moment, the signal threshold C0 is set to determine the sub-touch area 141 corresponding to the larger touch sensing signal as the target sub-touch area. The subsequent calculation steps are Only for the target sub-touch area. The above steps not only achieve more targeted data calculation, but also reduce the amount of calculated data.

The touch center calculation module 23 is specifically configured to: perform a weighted average on the geometric center coordinates of each target sub-touch area to obtain the current touch center coordinates. Wherein, the weight in the weighted average is the touch sensing signal corresponding to each target sub-touch area, and the weighted average includes weighted average of X coordinates and weighted average of Y coordinates. The touch center coordinates are the coordinates of the position where the touch object wants to touch at the current moment, and the touch center coordinates can be expressed as (Xlabel, Ylabel).

其中，k取大於等於1之整數，k為目標子觸控區域之數量；

Xlabel=Xsum/Dsum；Ylabel=Ysum/Dsum。 The calculation process of the aforementioned touch center calculation module 23 can be expressed as:

Among them, k is an integer greater than or equal to 1, and k is the number of target sub-touch areas;

Xlabel = Xsum / Dsum ; Ylabel = Ysum / Dsum .

For specific examples of calculation methods, please refer to the first embodiment.

The touch system 20 provided in this embodiment includes an area dividing module 21, a target sub-touch area determining module 22, and a touch center computing module 23. In one embodiment, the whole touch system 20 can be a circuit system of a touch control chip or as a part of a circuit system of a touch control chip; in another embodiment, the whole touch system 20 can be set in a smart On the motherboard of the device; in another embodiment, part of the touch control system 20 is used as a circuit system in a touch control chip, and the other part is set on the motherboard of a smart device that includes the touch control chip. The present invention does not set any limitation on the storage form of the touch system 20.

In the touch system 20 provided in this embodiment, the effective touch area 14 is divided into a plurality of sub-touch areas 141 by the area dividing module 21, and the target sub-touch area determining module 22 determines the sub-touch areas that meet preset conditions 141 is determined as the target sub-touch area, while referring to the touch sensing signal corresponding to the target sub-touch area and the geometric center coordinates of the target sub-touch area, the touch center calculation module 23 calculates the touch center coordinates. In the calculation process, the geometric center coordinates of the target sub-touch area are used, and the calculation results of the touch center coordinates will not be affected by the shape of each target sub-touch area. Therefore, the touch center calculation provided in this embodiment The method is especially suitable for smart devices with special-shaped touch screens (with special-shaped effective touch areas), and can effectively improve touch accuracy.

Example four

Referring to FIG. 11, the touch control system provided in this embodiment is different from the third embodiment in that the target sub-touch area determining module 22 specifically includes: a second obtaining unit 224 for obtaining each sub-touch at the current moment. The touch sensing signal corresponding to the control area; the second determining unit 225 is used to compare the child touch area corresponding to the largest touch sensing signal and the child corresponding to the largest touch sensing signal The sub-touch areas adjacent to the touch area are all determined as the target sub-touch areas.

That is, the difference between this embodiment and the first embodiment is that the target sub-touch area determining module 22 determines the predetermined condition of the target sub-touch area. For details of the preset conditions for determining the target sub-touch area, refer to the description in the second embodiment.

In this embodiment, only the differences from the third embodiment are described in detail, and the rest will not be repeated here.

It should be understood that the touch control system provided in this embodiment can achieve all the beneficial effects described in the third embodiment.

Example five

The touch device provided in this embodiment includes any one of the touch systems 20 described in the third to fourth embodiments. It should be understood that the touch device provided in this embodiment can achieve all the beneficial effects described in the third to fourth embodiments.

Those of ordinary skill in the art should realize that the above embodiments are only used to illustrate the present invention, but not to limit the present invention. As long as they fall within the essential spirit of the present invention, the above embodiments are appropriate Changes and changes fall within the scope of protection of the present invention.

S1, S2, S3: steps

Claims (9)

A method for calculating a touch center, the improvement includes: step S1, setting an area threshold, and dividing the effective touch area to form a plurality of sub-touch areas with an area larger than the area threshold, each of the sub-touch areas corresponding to There is position information; step S2, acquiring the touch sensing signal corresponding to each of the sub-touch areas at the current moment, and determining the sub-touch area corresponding to the touch-sensing signal that meets the preset condition as the target sub-touch area Step S3: Calculate the touch center at the current moment according to the position information of each target sub-touch area and the touch sensing signal corresponding to each target sub-touch area. The touch center calculation method according to claim 1, wherein the position information corresponding to each of the sub touch areas is the geometric center coordinates of each of the sub touch areas. The touch center calculation method according to claim 2, wherein step S2 includes: step S21, acquiring the touch sensing signal corresponding to each of the sub-touch regions at the current moment; step S22, setting a signal threshold, and determining each Whether the touch sensing signal corresponding to the sub-touch area is greater than the signal threshold; step S23, if the judgment is yes, then the sub-touch corresponding to the touch sensing signal that is greater than the signal threshold is determined The area is determined as the target sub touch area. The touch center calculation method according to claim 2, wherein, step S2 includes: step S24, acquiring the touch sensing signal corresponding to each of the sub-touch areas at the current moment; step S25, the largest of the touch The sub-touch area corresponding to the sensing signal and the sub-touch area adjacent to the sub-touch area corresponding to the largest touch-sensing signal are both determined as the target sub-touch area. The touch center calculation method according to claim 3 or 4, wherein step S3 is specifically: performing a weighted average of the geometric center coordinates of each target sub-touch area to obtain the touch center coordinates at the current moment; Wherein, the weight in the weighted average is the touch sensing signal corresponding to each target sub-touch area. A touch control system is improved in that it includes: The area division module is used to divide the effective touch area to form a plurality of sub touch areas, each of the sub touch areas has an area greater than a preset area threshold, and each of the sub touch areas corresponds to a position information ; The target sub-touch area determination module is used to obtain the touch sensing signal corresponding to each of the sub-touch areas at the current moment, and determine the sub-touch area corresponding to the touch sensing signal that meets the preset conditions as the target Sub-touch area; the touch center calculation module is used to calculate the touch at the current moment according to the position information of each target sub-touch area and the touch sensing signal corresponding to each target sub-touch area Control center. The touch system according to claim 6, wherein the target sub-touch area determining module specifically includes: a first obtaining unit configured to obtain the touch sensing signal corresponding to each of the sub-touch areas at the current moment; The determining unit is configured to set a signal threshold to determine whether the touch sensing signal corresponding to each of the sub-touch areas is greater than the signal threshold; and the first determining unit is configured to determine whether the touch sensing signal is greater than The sub-touch area corresponding to the touch sensing signal of the signal threshold is determined to be the target sub-touch area; or the target sub-touch area determining module specifically includes: a second acquiring unit for acquiring the current A touch sensing signal corresponding to each of the sub-touch areas at any time; and a second determining unit for comparing the sub-touch area corresponding to the largest touch sensing signal with the largest one The sub-touch areas adjacent to the sub-touch area corresponding to the sensing signal are all determined as the target sub-touch area. The touch system according to claim 6, wherein the touch center calculation module is specifically configured to: perform a weighted average on the position information of each target sub-touch area to obtain target coordinates, and the target coordinates are The touch center coordinates at the current moment; wherein the position information is the geometric center coordinates of each of the sub-touch areas, and the weighted average weight is the touch feeling corresponding to each of the target sub-touch areas Test signal. A touch device is improved in that it includes the touch system according to any one of Claims 6 to 8.

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