Touchpad and force sensing information correction method thereof

Abstract

The present application is a kind of touchpad and its force sensing information correction method, the touchpad includes force sensing layer and touch sensing layer, the force sensing layer contains a plurality of force sensing points, the touch sensing layer contains a plurality of touch sensing points, a force sensing point corresponds to n touch sensing points, by the touch sensing information received by the touch sensing layer, the force sensing information received by the force sensing layer is adjusted, so that the resolution of the adjusted force sensing information is higher than the resolution of the original received force sensing information, thereby achieving the purpose of correcting the force sensing information, to improve the accuracy of judging the force size of the object when operating on the touchpad.

Description

Technical Field

[0001] This invention relates to a touchpad, and more particularly to the technical field of force sensing information correction therein. Background Technology

[0002] As touchpads offer increasingly more functions, many touchpads have added force sensing functionality in addition to the original touch sensing function. These touchpads have a touch electrode layer, a force sensing layer, and a deformable spacer layer. The deformable spacer layer is located between the touch electrode layer and the force sensing layer, so that the force sensing layer can further determine the magnitude of the force applied to the touch electrode layer by deforming the spacer layer.

[0003] Due to cost and integrated circuit pin count limitations, the resolution of the force-sensing layer in existing touchpads is lower than that of the touch electrode layer. Therefore, within the same unit area, the touch electrode layer forms more touch-sensing points than the force-sensing layer; in other words, the distance between adjacent force-sensing points is larger. When an object is pressed on the touchpad, the corresponding change in capacitance at each force-sensing point is used as the force sensing data to determine the downward pressure of each object. However, due to the large distance between adjacent force-sensing points, when multiple objects touch and press simultaneously, each force-sensing point may be affected by the force of nearby objects, failing to accurately reflect the downward pressure of each object. This causes existing touchpads to be inaccurate in determining force sensing information. Summary of the Invention

[0004] In view of this, the present invention addresses the problem of low resolution of the force sensing layer, aiming to effectively improve the accuracy of force sensing information while maintaining the same cost and pin count.

[0005] To achieve the aforementioned objective, the present invention provides a method for correcting force sensing information of a touchpad. The touchpad includes a force sensing layer and a touch sensing layer. The force sensing layer comprises an array of force sensing points, and the touch sensing layer comprises an array of touch sensing points. Each force sensing point corresponds to n touch sensing points. The correction method includes the following steps:

[0006] a. Receive a first force sensing information sensed by the force sensing layer, and receive a touch sensing information sensed by the touch sensing layer; and

[0007] b. Adjust the first force sensing information based on the touch sensing information to obtain a second force sensing information, wherein the resolution of the second force sensing information is higher than the resolution of the first force sensing information.

[0008] On the other hand, the present invention also provides a touchpad, which includes:

[0009] A substrate having a force-sensing layer comprising a plurality of force-sensing points arranged in an array;

[0010] A touch sensing layer comprising an array of multiple touch sensing points, wherein each force sensing point corresponds to n touch sensing points;

[0011] A protective layer, wherein the touch sensing layer is disposed between the substrate and the protective layer;

[0012] A deformable unit is disposed between the substrate and the touch sensing layer;

[0013] A controller is electrically connected to the force-sensing layer and the touch-sensing layer, and the controller performs the aforementioned calibration method.

[0014] The advantage of this invention is that by using higher resolution touch sensing information as a reference, the first force sensing information sensed by the force sensing layer is adjusted to a second force sensing information with higher resolution, thereby achieving the purpose of correcting the force sensing information and improving the accuracy of judging the magnitude of the force applied by the object when operating the touchpad.

[0015] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention. Attached Figure Description

[0016] Figure 1A This is a side cross-sectional view of the touch panel of the present invention;

[0017] Figure 1B This is a block diagram of some components of the touch panel of the present invention;

[0018] Figure 2 This is a schematic diagram of the sensing traces of the touch sensing layer of the touch panel of the present invention;

[0019] Figure 3 This is a schematic diagram of the drive sensing trace and force sensing trace of the touch panel of the present invention;

[0020] Figure 4A and Figure 4B This is a schematic diagram of the touch sensing information of the present invention;

[0021] Figure 5 This is a schematic diagram of the first force sensing information of the present invention;

[0022] Figure 6A and Figure 6B This is a schematic diagram of the third force sensing information of the present invention;

[0023] Figure 7 This is a schematic diagram of the second force sensing information according to the first embodiment of the present invention;

[0024] Figure 8A This is a schematic diagram of the second force sensing information according to the second embodiment of the present invention;

[0025] Figure 8B This is a schematic diagram of the operation in the second embodiment of the present invention;

[0026] Figure 9A This is a schematic diagram of the second force sensing information according to the third embodiment of the present invention;

[0027] Figure 9B This is a schematic diagram illustrating the operation of the third embodiment of the present invention;

[0028] Figure 10A This is a schematic diagram of the initial second force sensing information according to the fourth embodiment of the present invention;

[0029] Figure 10B This is a schematic diagram of the final second force sensing information according to the fourth embodiment of the present invention;

[0030] Figure 10C This is a schematic diagram of the operation in the fourth embodiment of the present invention.

[0031] In the attached figures, the following labels are used:

[0032] 10: Substrate; 20: Protective layer

[0033] 30: Deformable unit; 40: Touch sensing layer

[0034] 400: Touch sensor point; 401: Touch sensor value

[0035] 41: Driving electrode layer 411: Driving sensing trace

[0036] 42: Receiving electrode layer; 421: Receiving induction trace

[0037] 50: Force sensing layer; 500: Force sensing point

[0038] 501: First force sensing value; 502: Second force sensing value

[0039] 503: Third force sensing value; 504: Fourth force sensing value

[0040] 505: Fifth force sensing value; 51: Force sensing trace

[0041] 511: Force sensing trace; 60: Controller

[0042] TI: Touch sensing information; FI1: First force sensing information

[0043] FI 21 FI 22 FI 23 FI 24Second force sensing information

[0044] FI3: Third Force Sensing Information; ETR: Effective Touch Range

[0045] EFR: Effective Force Sensing Range Detailed Implementation

[0046] The following description, in conjunction with the accompanying drawings and embodiments of the invention, further illustrates the technical means employed by the invention to achieve its intended purpose. The drawings have been simplified for illustrative purposes only, and the structure or method of the invention is explained by describing the relationship between the elements and components. Therefore, the elements shown in the drawings are not presented in actual quantity, shape, size, or proportion; the size or proportion has been enlarged or simplified to provide a better illustration. Actual quantity, shape, or proportion has been selectively designed and configured, and the detailed element layout may be more complex.

[0047] Please see Figure 1A and Figure 1B As shown, the touch panel of the present invention includes a substrate 10, a protective layer 20, a deformable unit 30, a touch sensing layer 40, a force sensing layer 50, and a controller 60. The deformable unit 30 is disposed between the substrate 10 and the protective layer 20, the touch sensing layer 40 is disposed between the protective layer 20 and the deformable unit 30, and the force sensing layer 50 is disposed between the deformable unit 30 and the substrate 10. In one embodiment, the force sensing layer 50 is disposed on the substrate 10. The controller 60 is electrically connected to the force sensing layer 50 and the touch sensing layer 40 via the substrate 10.

[0048] Please see Figures 1A to 3 As shown, the touch sensing layer 40 includes a plurality of touch sensing points 400 arranged in a matrix, and the force sensing layer 50 includes a plurality of force sensing points 500 arranged in a matrix. The size range of each force sensing point 500 corresponds to the size range of n touch sensing points 400, where n is a positive integer greater than 1, for example... Figure 2 and Figure 3 In the embodiment shown, one force sensing point 500 corresponds to three touch sensing points 400.

[0049] Please see Figure 1A As shown, in one embodiment, the touch sensing layer 40 includes a driving electrode layer 41 and a receiving electrode layer 42. The driving electrode layer 41 is located between the receiving electrode layer 42 and the force sensing layer 50. The driving electrode layer 41 and the receiving electrode layer 42 generate a coupling capacitance to generate touch sensing information TI. The driving electrode layer 41 and the force sensing layer 50 generate a coupling capacitance to generate first force sensing information FI1.

[0050] Please see Figures 1A to 3 As shown, in one embodiment, the driving electrode layer 41 includes a plurality of driving sensing traces 411 arranged in parallel intervals; the receiving electrode layer 42 includes a plurality of receiving sensing traces 421 arranged in parallel intervals; the driving sensing traces 411 and the receiving sensing traces 421 are arranged perpendicularly; the force sensing layer 50 includes a plurality of sub-force sensing traces 511 arranged in parallel intervals; each sub-force sensing trace 511 is aligned with one of the receiving sensing traces 421 and is arranged perpendicularly to the receiving sensing trace 421; adjacent n sub-force sensing traces 511 are connected in parallel to form a force sensing trace 51, such that each force sensing trace 51 corresponds to n receiving sensing traces 421. The intersection point of each driving sensing trace 411 and each receiving sensing trace 421 is the touch sensing point 400, and the intersection point of each driving sensing trace 411 and each force sensing trace 51 is the force sensing point 500. Taking z driving sensing traces 411, x force sensing traces 51, and y receiving sensing traces 421 as an example, x*z force sensing points 500 and y*z touch sensing points 400 are formed, where x*n = y.

[0051] When multiple touch objects contact the protective layer 20, each touch sensing point 400 generates a different coupling capacitance corresponding to its proximity to the contact point of the touch object, and each force sensing point 500 also generates a different coupling capacitance corresponding to the downward pressure of the touch object. For example, such as Figure 4A The image shows a matrix of sensing quantities plotted from the coupling capacitance generated by each touch sensing point 400, constituting a touch sensing information TI; as shown... Figure 5 The diagram shows the sensing matrix plotted from the coupling capacitance generated by each force sensing point 500, constituting a first force sensing information FI1. Since the number of force sensing points 500 is 1 / n of the number of touch sensing points 400, the resolution of the first force sensing information FI1 is lower than the resolution of the touch sensing information TI. The controller 60 adjusts the first force sensing information FI1 based on the touch sensing information TI to obtain a second force sensing information with higher resolution, thereby improving the accuracy of determining the magnitude and position of the applied force on the touched object. The following describes different implementation methods for adjusting the first force sensing information FI1 based on the touch sensing information TI, and uses... Figure 4A The touch sensing information TI shown (containing 24*16 touch sensing values, each touch sensing value 401 corresponding to the sensing amount generated by each touch sensing point 400) and Figure 5 The first force sensing information FI1 shown (containing 8*16 first force sensing values ​​501, each of which corresponds to the sensing amount generated by each force sensing point 500) is used as an example, but is not limited to this.

[0052] First Embodiment

[0053] Please see Figures 4A to 7 As shown, each of the first force sensing values ​​501 in the first force sensing information FI1 (such as...) Figure 5 The positions of the n touch sensing points (as shown) are designated as the n second force sensing values ​​502 (e.g., ...). Figure 6A As shown), the second force sensing value 502 constitutes a third force sensing information FI3, that is, the resolution of the first force sensing information FI1 (8*16) is expanded to the resolution of the third force sensing information FI3 (24*16), wherein the third force sensing information FI3 is proportionally aligned with the resolution of the touch sensing information TI, and the third force sensing information FI3 is adjusted according to the touch sensing information TI to obtain the second force sensing information FI. 21 In this embodiment, the aforementioned adjustment method selects an effective touch range ETR based on the touch sensing information TI (e.g., ...). Figure 4B As shown), and then based on the orthographic projection of the effective touch range ETR into the third force sensing information FI3, an effective force sensing range EFR is obtained (e.g. Figure 6B (As shown), then the second force sensing information FI is constructed using each of the second force sensing values ​​502 within the effective force sensing range EFR. 21 (like Figure 7 As shown), the effective touch range (ETR) can be the position and outline range of the touch object relative to the touchpad. Specifically, as... Figure 4A The touch sensing information TI shown is assumed to be a valid sensing value when the sensing value is greater than 100. Figure 4B The circled area (8,7)~(8,9), (9,6)~(9,9), and (10,7)~(10,9) is defined as one effective touch range (ETR), and the area (14,7)~(14,8), (15,6)~(15,8), (16,6)~(16,9), and (17,7)~(17,9) is defined as another effective touch range (ETR). Figure 6B In the third force sensing information FI3 shown, the orthographic projection corresponds to coordinates (8,7)~(8,9), (9,6)~(9,9), and (10,7)~(10,9) as an effective force sensing range, and coordinates (14,7)~(14,8), (15,6)~(15,8), (16,6)~(16,9), and (17,7)~(17,9) as another effective force sensing range EFR. Therefore, if... Figure 7 As shown, the second force sensing value 502 in the corresponding effective force sensing range EFR is used to construct the second force sensing information FI. 21The second force sensing value 502 for the remaining unselected areas can be ignored or considered as 0. The obtained second force sensing information FI... 21 Since it is determined based on the effective touch range ETR of the touch sensing information TI, noise interference from non-object touch areas can be eliminated, which can effectively improve the accuracy of judging the force applied to the object.

[0054] Second Embodiment

[0055] Please see Figures 4A to 6B and Figure 8A As shown, each of the first force sensing values ​​501 in the first force sensing information FI1 (such as...) Figure 5 The positions of the n touch sensing points (as shown) are designated as the n second force sensing values ​​502 (e.g., Figure 6A As shown), the second force sensing value 502 constitutes a third force sensing information FI3, that is, the resolution of the first force sensing information FI1 (8*16) is expanded to the resolution of the third force sensing information FI3 (24*16) to correspond to the resolution of the touch sensing information TI. Then, the third force sensing information FI3 is adjusted according to the touch sensing information TI to obtain the second force sensing information FI. 21 In this embodiment, the aforementioned adjustment method selects the effective touch range ETR (e.g., based on the touch sensing information TI) Figure 4B As shown), and then based on the orthographic projection of the effective touch range ETR into the third force sensing information FI3, an effective force sensing range EFR is obtained (e.g. Figure 6B (As shown), then a correction value is obtained for the touch sensing value 401 corresponding to the effective touch range EFR, and then the second force sensing value 503 in the effective force sensing range EFR is calculated according to the correction value to obtain the corresponding third force sensing value 503. The third force sensing value 503 constitutes the second force sensing information FI. 22 Specifically, such as Figure 4A The touch sensing information TI shown is assumed to be a valid sensing value when the sensing value is greater than 100. Figure 4B The circled areas (8,7)~(8,9), (9,6)~(9,9), and (10,7)~(10,9) are designated as one effective touch range (ETR), and the areas (14,7)~(14,8), (15,6)~(15,8), (16,6)~(16,9), and (17,7)~(17,9) are designated as another effective touch range (ETR). Within each effective touch range (ETR), a value is extracted as a correction value, such as the maximum value within that range. Figure 6BIn the third force sensing information FI3 shown, the orthographic projection corresponds to coordinates (8,7)~(8,9), (9,6)~(9,9), and (10,7)~(10,9) as an effective force sensing range EFR, and coordinates (14,7)~(14,8), (15,6)~(15,8), (16,6)~(16,9), and (17,7)~(17,9) as another effective force sensing range EFR. Finally, the second force sensing value 502 in the corresponding effective force sensing range EFR is corrected using this correction value, thus obtaining the following... Figure 8A The third force sensing values ​​503 shown are used to constitute the second force sensing information FI. 22 The calculation formula can be varied; the following example is provided but is not limited to this. Using the second force sensing value 'e', ​​the touch sensing value 'f', and the correction value 'g' as the operation symbols, the correction calculation method can be as follows: For example, please see Figure 8B Taking the second force sensing value 502 at coordinates (8,8)~(10,8) in the third force sensing information FI3 as an example, the second force sensing values ​​502 at these coordinates are 94, 114, and 114 respectively. The maximum touch sensing value 401 selected in the corresponding effective touch sensing range ETR is 3856, which is used as a correction value. After calculation according to the aforementioned formula, the result is obtained in the second force sensing information FI3. 22 The third force sensing values ​​503 are 42, 114, and 30, respectively. In this way, in addition to eliminating noise interference from non-object-touching areas through the effective touch range ETR, which can effectively improve the accuracy of judging the force applied by the object, the force sensing value can also be corrected by the touch sensing value, so that the force sensing information is more consistent with the shape of the area touched by the object, and the accuracy of the force sensing information can be further improved.

[0056] Third Embodiment

[0057] Please see Figure 4A , Figure 5 and Figure 9A As shown, each of the first force sensing values ​​501 in the first force sensing information FI1 (such as...) Figure 5 The touch sensing values ​​401 for the n positions corresponding to (as shown) Figure 4A As shown), a base value is obtained from the n touch sensing values ​​401. This base value can be the maximum, average, or sum of the n touch sensing values ​​401. Each first force sensing value 501 is calculated based on its corresponding base value to obtain n fourth force sensing values ​​504 (e.g., ...). Figure 9A As shown), the second force sensing information FI is composed of these fourth force sensing values ​​504. 23 There can be various calculation formulas; the following are examples, but not limited to these. Figure 9BAs shown, each first force sensing value 501 corresponds to three touch sensing values ​​401. For example, taking the first force sensing value at coordinate (5,7) in the first force sensing information FI1 as an example, it corresponds to coordinates (15,7) to (17,7) in the corresponding touch sensing information TI. The maximum value 3496 among the touch sensing values ​​at coordinates (15,7) to (17,7) is taken as the base value. Using each first force sensing value i, each touch sensing value j, and the base value k as the operation symbols, the calculation formula is: Then as Figure 9B As shown, the fourth force sensing values ​​504 for coordinates (15,7) to (17,7) are 129, 234, and 46 respectively, and so on. It should be noted that, to avoid the negative-to-positive conversion during calculation, where a negative value becomes a larger positive value, if the maximum value among the n touch sensing values ​​is negative or 0, the corresponding fourth force sensing value can be set to 0 or ignored. Correcting the force sensing value using the touch sensing value makes the force sensing information more consistent with the shape of the area touched by the object, thus improving the accuracy of the force sensing information.

[0058] Fourth embodiment

[0059] Furthermore, the results obtained in the fourth embodiment can be used to further select the effective touch range ETR (e.g., based on the touch sensing information TI) Figure 4B As shown), based on this effective touch range, ETR is... Figure 9A The second force sensing information FI shown 23 The orthographic projection corresponds to an effective force sensing range (EFR) (e.g.) Figure 10A The second force sensing information FI shown in the figure 24 Furthermore, after obtaining the effective force sensing range (EFR), the maximum value in the effective touch range (ETR) can be used as a correction value. Then, each of the fourth force sensing values ​​504 within the effective force sensing range is calculated based on this correction value to obtain the corresponding fifth force sensing value 505. The fifth force sensing value is then used to construct... Figure 10B The second force sensing information FI shown 25 The calculation formula can be varied; the following example is provided but is not limited to this. Using the fourth force sensing value 'e', ​​the touch sensing value 'f', and the correction value 'g' as the operation symbols, the correction calculation method can be as follows: For example, please see Figure 10C As shown, with Figure 10A The second force sensing information FI shown 23Taking the fourth force sensing value 504 at coordinates (8,8)~(10,8) as an example, the fourth force sensing values ​​504 at these coordinates are 94, 114, and 30 respectively. Referring to the maximum touch sensing value 401 selected in the corresponding effective touch sensing range ETR, which is 3856, as a correction value, the second force sensing information FI is obtained after calculation according to the aforementioned formula. 24 The fifth force sensing values ​​505 are 42, 114, and 8 respectively. In this way, in addition to eliminating noise interference from non-object-touching areas through the effective touch range ETR, which can effectively improve the accuracy of judging the force applied by the object, the force sensing value can also be corrected by the touch sensing value, so that the force sensing information is more consistent with the shape of the area touched by the object, and the accuracy of the force sensing information can be further improved.

[0060] Furthermore, the second force sensing information FI obtained after the aforementioned correction... 21 FI 22 FI 23 FI 24 Each of these can be further processed by an image filter to remove noise and make the image edges of adjacent force sensing values ​​in the second force sensing information smoother.

[0061] Of course, the present invention may have other various embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding changes and modifications should all fall within the protection scope of the appended claims.

Claims

1. A method for correcting force-sensing information of a touchpad, characterized in that, The touchpad includes a force-sensing layer and a touch-sensing layer. The force-sensing layer contains an array of force-sensing points, and the touch-sensing layer contains an array of touch-sensing points. There are x*z force-sensing points and y*z touch-sensing points, with each force-sensing point corresponding to n touch-sensing points, where n is a positive integer greater than 1. x, y, and z are all positive integers, and x*n equals y. The calibration method includes the following steps: a. Receive a first force sensing information sensed by the force sensing layer, and receive a touch sensing information sensed by the touch sensing layer, wherein the first force sensing information includes the first force sensing values ​​of the x*z force sensing points; b1. The positions of n touch sensing points corresponding to each of the first force sensing values ​​are designated as n second force sensing values ​​to obtain y*z second force sensing values, and the second force sensing values ​​constitute a third force sensing information; and b2. Adjust the third force sensing information based on the touch sensing information to obtain a second force sensing information.

2. The force sensing information correction method for a touchpad as described in claim 1, characterized in that, Step b2 includes the following steps: b21. Based on the touch sensing information, select an effective touch range, and then obtain an effective force sensing range based on the orthographic projection of the effective touch range; and b22. The second force sensing information is constituted using each of the second force sensing values ​​within the effective force sensing range.

3. The force sensing information correction method for a touchpad as described in claim 1, characterized in that, Step b2 includes the following steps: b21. Select an effective touch range based on the touch sensing information, and then obtain an effective force sensing range based on the orthographic projection of the effective touch range; b22. Obtain a correction value from the touch sensing value corresponding to the effective touch range; and b23. After calculating each of the second force sensing values ​​in the effective force sensing range according to the correction value, a corresponding third force sensing value is obtained, and the third force sensing value constitutes the second force sensing information.

4. The force sensing information correction method for a touchpad as described in claim 3, characterized in that, The correction value is the maximum value of the touch sensing value corresponding to the effective touch range.

5. The force sensing information correction method for a touchpad as described in claim 3, characterized in that, With the second force sensing value e, the touch sensing value f, and the correction value g, the calculation formula in step b23 is as follows: 。 6. The force sensing information correction method for a touchpad as described in claim 1, characterized in that: In step b, if the force sensing point has a first force sensing value that is less than a force sensing threshold, then the force sensing point is an invalid force sensing point, and the second force sensing information does not include force sensing information that is identified as the invalid force sensing point.

7. The force sensing information correction method for a touchpad as described in claim 1, characterized in that: In step b, if the touch sensing point has a touch sensing value less than a touch sensing threshold, then the touch sensing point is an invalid touch sensing point, and the second force sensing information does not include the force sensing information corresponding to the invalid touch sensing point.

8. The method for force sensing information correction of a touchpad as described in any one of claims 1 to 7, characterized in that, The second force-sensing information is then processed by an image filter.

9. A touchpad, characterized in that, include: A substrate having a force-sensing layer comprising a plurality of force-sensing points arranged in an array; A touch sensing layer includes multiple touch sensing points arranged in an array. The force sensing points are x*z force sensing points, and the touch sensing points are y*z touch sensing points. Each force sensing point corresponds to n touch sensing points, where n is a positive integer greater than 1, x, y, and z are all positive integers, and x*n equals y. A protective layer, wherein the touch sensing layer is disposed between the substrate and the protective layer; A deformable unit is disposed between the substrate and the touch sensing layer; A controller, which is electrically connected to the force-sensing layer and the touch-sensing layer, performs the following steps: a. Receive a first force sensing information sensed by the force sensing layer, and receive a touch sensing information sensed by the touch sensing layer, wherein the first force sensing information includes the first force sensing values ​​of the x*z force sensing points; b1. The positions of n touch sensing points corresponding to each of the first force sensing values ​​are designated as n second force sensing values ​​to obtain y*z second force sensing values, and the second force sensing values ​​constitute a third force sensing information; and b2. Adjust the third force sensing information based on the touch sensing information to obtain a second force sensing information.

10. The touchpad as described in claim 9, characterized in that, The touch sensing layer includes a driving electrode layer and a receiving electrode layer. The driving electrode layer is located between the receiving electrode layer and the force sensing layer. The driving electrode layer is coupled with the force sensing layer to generate the first force sensing information, and the driving electrode layer is coupled with the receiving electrode layer to generate the touch sensing information.

11. A method for correcting force-sensing information of a touchpad, characterized in that, The touchpad includes a force-sensing layer and a touch-sensing layer. The force-sensing layer contains an array of force-sensing points, and the touch-sensing layer contains an array of touch-sensing points. There are x*z force-sensing points and y*z touch-sensing points, with each force-sensing point corresponding to n touch-sensing points, where n is a positive integer greater than 1. x, y, and z are all positive integers, and x*n equals y. The calibration method includes the following steps: a. Receive a first force sensing information sensed by the force sensing layer, and receive a touch sensing information sensed by the touch sensing layer, wherein the first force sensing information includes the first force sensing values ​​of the x*z force sensing points; b1. Obtain a base value based on the touch sensing values ​​of the n touch sensing points corresponding to each of the force sensing points; b2. The first force sensing value of each force sensing point is calculated based on the corresponding base value to obtain y*z fourth force sensing values; and b3. Obtain a second force sensing information based on the fourth force sensing value.

12. The force sensing information correction method for a touchpad as described in claim 11, characterized in that, In step b3, the second force sensing information is constituted by the fourth force sensing value.

13. The force sensing information correction method for a touchpad as described in claim 11, characterized in that, Step b3 includes the following steps: b31. Select an effective touch range based on the touch sensing information, and then obtain an effective force sensing range based on the orthographic projection of the effective touch range; b32. The second force sensing information is constituted by each of the fourth force sensing values ​​within the effective force sensing range.

14. The force sensing information correction method for a touchpad as described in claim 11, characterized in that, Step b3 includes the following steps: b31. Select an effective touch range based on the touch sensing information, and then obtain an effective force sensing range based on the orthographic projection of the effective touch range; b32. Obtain a correction value from the touch sensing value corresponding to the effective touch range; b33. After calculating each of the fourth force sensing values ​​in the effective force sensing range according to the correction value, the corresponding fifth force sensing value is obtained, and the fifth force sensing value constitutes the second force sensing information.

15. The method for force sensing information correction of a touchpad as described in any one of claims 11 to 14, characterized in that, The base value mentioned in step b1 is the maximum, average, or sum of the touch sensing values ​​of the n touch sensing points.

16. The method for force sensing information correction of a touchpad as described in any one of claims 11 to 14, characterized in that, With the first force sensing value i, the touch sensing value j, and the base value k, the calculation formula in step b2 is: 。 17. The force sensing information correction method for a touchpad as described in claim 14, characterized in that, The correction value is the maximum value of the touch sensing value corresponding to the effective touch range.

18. The force sensing information correction method for a touchpad as described in claim 14, characterized in that, With the fourth force sensing value as e, the touch sensing value as f, and the correction value as g, the calculation formula described in step b33 is: 。 19. A touchpad, characterized in that, include: A substrate having a force-sensing layer comprising a plurality of force-sensing points arranged in an array; A touch sensing layer includes multiple touch sensing points arranged in an array. The force sensing points are x*z force sensing points, and the touch sensing points are y*z touch sensing points. Each force sensing point corresponds to n touch sensing points, where n is a positive integer greater than 1, x, y, and z are all positive integers, and x*n equals y. A protective layer, wherein the touch sensing layer is disposed between the substrate and the protective layer; A deformable unit is disposed between the substrate and the touch sensing layer; A controller, which is electrically connected to the force-sensing layer and the touch-sensing layer, performs the following steps: a. Receive a first force sensing information sensed by the force sensing layer, and receive a touch sensing information sensed by the touch sensing layer, wherein the first force sensing information includes the first force sensing values ​​of the x*z force sensing points; b1. Obtain a base value based on the touch sensing values ​​of the n touch sensing points corresponding to each of the force sensing points; b2. The first force sensing value of each force sensing point is calculated based on the corresponding base value to obtain y*z fourth force sensing values; and b3. Obtain a second force sensing information based on the fourth force sensing value.

20. The touchpad as claimed in claim 19, characterized in that, The touch sensing layer includes a driving electrode layer and a receiving electrode layer. The driving electrode layer is located between the receiving electrode layer and the force sensing layer. The driving electrode layer is coupled with the force sensing layer to generate the first force sensing information, and the driving electrode layer is coupled with the receiving electrode layer to generate the touch sensing information.

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