CN115079848A - Touch sensing device and touch sensing method - Google Patents

Abstract

A touch sensing device and a touch sensing method are provided. The touch panel comprises a touch pad and a circuit board, the circuit board is located between the base plate and the touch pad, the circuit board comprises a pressure sensor and a position sensor, the position sensor detects and obtains a touch position on the touch pad, and the pressure sensor detects that the touch position is pressed to obtain a pressing pressure value. The storage device stores a first pressure threshold and a second pressure threshold, the first pressure threshold and the second pressure threshold correspond to a first position and a second position on the touch plate respectively, the processor outputs a trigger signal according to the fact that the pressing pressure value is larger than the first pressure threshold when the touch position is located at the first position, and the processor outputs the trigger signal according to the fact that the pressing pressure value is larger than the second pressure threshold when the touch position is located at the second position.

Description

Touch sensing device and touch sensing method

Technical Field

The present invention relates to a sensing device, and more particularly, to a touch sensing device and a touch sensing method.

Background

A touch pad is an input device widely used in computers, and is used to sense the movement or pressing of a user's finger to control the cursor movement (e.g. displacement or clicking).

Currently, the touch pad is pressed and sensed by a physical switch, for example, the physical switch may be a metal dome switch (metal dome) or a rubber dome switch (rubber dome), and when the touch pad is pressed by a user, the touch pad may press the physical switch to deform to turn on a contact point to trigger a pressing signal. However, in the actual operation process of the touch pad, the farther the user presses the touch pad away from the physical switch, the larger the required pressing force is, the more the physical switch is deformed to trigger the signal, which causes the trouble and inconvenience in operation for the user.

Disclosure of Invention

In view of the foregoing, in one embodiment, a touch sensing device is provided and includes a substrate, a touch panel, a memory, and a processor. The touch panel is arranged on the substrate and comprises a touch plate and a circuit board, the circuit board is located between the substrate and the touch plate, the circuit board comprises a pressure sensor and a position sensor, the position sensor detects and obtains a touch position on the touch plate, and the pressure sensor detects that the touch position is pressed to obtain a pressing pressure value. The memory stores a first pressure threshold and a second pressure threshold, the first pressure threshold and the second pressure threshold corresponding to a first position and a second position on the touch pad, respectively, the first pressure threshold being different from the second pressure threshold, a distance from the first position to the pressure sensor being different from a distance from the second position to the pressure sensor. The processor is electrically connected to the pressure sensor, the position sensor and the storage, and obtains a first pressure threshold value, a second pressure threshold value, a touch position and a pressing pressure value. When the touch position is located at the first position, the processor outputs the trigger signal according to the fact that the pressing pressure value is larger than the first pressure threshold value, and when the touch position is located at the second position, the processor outputs the trigger signal according to the fact that the pressing pressure value is larger than the second pressure threshold value.

In another embodiment, a touch sensing method is provided, which includes obtaining a touch position on a touch pad and a pressing pressure value generated by pressing the touch position; obtaining a first pressure threshold and a second pressure threshold, wherein the first pressure threshold and the second pressure threshold correspond to a first position and a second position on the touch pad, respectively, and the first pressure threshold is different from the second pressure threshold; when the touch position is located at the first position, outputting a trigger signal according to the fact that the pressing pressure value is larger than a first pressure threshold value; and outputting a trigger signal when the touch position is located at the second position according to the fact that the pressing pressure value is larger than the second pressure threshold value.

To sum up, the touch sensing apparatus and the touch sensing method according to the embodiments of the invention set different pressure thresholds (i.e. the first pressure threshold and the second pressure threshold) at different positions (i.e. the first position and the second position) on the touch pad, and when the touch position is at the first position, the trigger signal is output according to the fact that the pressing pressure value is greater than the first pressure threshold, and when the touch position is at the second position, the trigger signal is output according to the fact that the pressing pressure value is greater than the second pressure threshold, so that when a user presses different positions of the touch pad, the trigger signal can be generated with the same or similar pressing force, so that the touch pad is more humanized and comfortable in operation.

Drawings

FIG. 1 is a perspective view of a touch sensing device according to a first embodiment of the present invention;

FIG. 2 is an exploded perspective view of a touch sensing device according to a first embodiment of the present invention;

FIG. 3 is a cross-sectional view of a touch sensing device according to a first embodiment of the present invention;

FIG. 4 is a top view of the touch sensing device according to the first embodiment of the present invention;

FIG. 5 is an exploded perspective view of a touch sensing device according to a second embodiment of the present invention;

FIG. 6 is a top view of a touch sensing device according to a second embodiment of the present invention;

FIG. 7 is an exploded perspective view of a touch sensing device according to a third embodiment of the present invention;

FIG. 8 is a top view of a touch sensing device according to a third embodiment of the present invention;

FIG. 9 is a flowchart illustrating a touch sensing method according to an embodiment of the present invention.

[ notation ] to show

N notebook computer

Touch sensing device

10 base plate

101, top surface

102 bar-shaped block body

103 block of

20, 20' touch panel

21, 21' touch plate

211 pivoting side

212 opposite side

213 first side

214 second side

215 pivoting part

22, 22' circuit board

23,23a,23b pressure sensors

231 first pressure sensing unit

232 second pressure sensing unit

24 position sensor

30: storage device

40, processor

A1, A1': first region

A2, A2

A3, A3': third zone

A4 fourth region

P1 first position

P2 second position

P3 third position

L1, L2: arrow

S01-S05

Detailed Description

Various embodiments are described in detail below, however, the embodiments are only used as examples and do not limit the scope of the invention. In addition, the drawings in the embodiments omit some elements to clearly show the technical features of the present invention. The same reference numbers will be used throughout the drawings to refer to the same or like elements.

Fig. 1 is a perspective view of a touch sensing device according to a first embodiment of the invention, fig. 2 is an exploded perspective view of the touch sensing device according to the first embodiment of the invention, fig. 3 is a cross-sectional view of the touch sensing device according to the first embodiment of the invention, and fig. 4 is a top view of the touch sensing device according to the first embodiment of the invention. As shown in fig. 1, the touch sensing device 1 (e.g., Touchpad or Trackpad) can be applied to a computer product, and a user can operate the touch sensing device 1 through sliding or pressing of a finger to control the displacement of the cursor or generate a corresponding control signal. For example, as shown in fig. 1, in the present embodiment, the touch sensing device 1 is applied to a notebook computer N. However, the present invention is not limited thereto, and in other embodiments, the touch sensing device 1 may also be applied to other portable computers (e.g. tablet computers). Alternatively, the touch sensing device 1 may be an independent device and externally connected to a computer product, and the embodiment is not limited thereto.

As shown in fig. 2 and fig. 3, in the present embodiment, the touch sensing device 1 includes a substrate 10, a touch panel 20, a storage 30 and a processor 40. The substrate 10 may be a hard plate made of metal (e.g. iron, aluminum or alloy) or plastic. Here, the substrate 10 is located at the bottom layer of the touch sensing device 1 and has a top surface 101, and the touch panel 20 is disposed above the top surface 101.

As shown in fig. 2 and 3, the touch panel 20 includes a touch pad 21 and a circuit board 22, the touch pad 21 and the circuit board 22 are stacked and fixed to each other, the circuit board 22 is located between the substrate 10 and the touch pad 21, and the touch pad 21 is used for a user's finger to perform a touch operation, for example, the user's finger can slide or press on the touch pad 21. In some embodiments, the touch panel 21 may be a plate made of glass or polyester resin (mylar).

As shown in fig. 2 and fig. 3, the circuit board 22 includes a pressure sensor 23 and a position sensor 24, and the position sensor 24 can detect and obtain a touched position on the touch pad 21, that is, the position sensor 24 can detect a specific position where a user's finger touches the surface of the touch pad 21 to obtain the touched position, wherein the touched position can be represented by a coordinate, but is not limited thereto. In some embodiments, the position sensor 24 may be a capacitive sensor, a piezoelectric sensor, a resistive sensor, or an infrared sensor.

As shown in fig. 2 and fig. 3, the pressure sensor 23 can detect the pressure applied to the touch position to obtain a pressing pressure value, in the embodiment, the pressure sensor 23 is adjacent to or in contact with the top surface 101 of the substrate 10, so that when the user presses the surface of the touch plate 21, the pressure sensor 23 can be pressed by the circuit board 22, and the pressure sensor 23 can sense the pressing pressure value at the touch position, for example, the pressing pressure value can be 30gf (gram-force), 40gf, 80gf, 100gf, 150gf or 200gf, depending on the pressing force of the user. In some embodiments, the pressure sensor 23 may be a capacitive pressure sensor, a piezoresistive pressure sensor, or a piezoelectric pressure sensor, and the pressing pressure value may be other pressure units.

As shown in fig. 2 and fig. 3, the touch panel 21 includes a pivot side 211, the pivot side 211 is pivoted to one side of the base panel 10, in this embodiment, a strip block 102 is fixedly disposed on one side of the base panel 10 close to the pivot side 211, and the pivot side 211 of the touch panel 21 can be assembled and fixed on the strip block 102 through adhesion, buckling, or locking, so that the touch panel 21 can swing relative to the base panel 10 with the pivot side 211 as a fulcrum. In addition, in the present embodiment, the touch plate 21 further has an opposite side 212 opposite to the pivot side 211, and the pressure sensor 23 is disposed between the opposite side 212 and the substrate 10. However, this embodiment is merely an example, in some embodiments, the pivotal side 211 of the touch plate 21 may be pivotally connected to one side of the base plate 10 by other methods, and the pressure sensor 23 may be disposed between the pivotal side 211 and the opposite side 212.

As shown in fig. 2 and 3, the storage 30 stores a plurality of different pressure thresholds corresponding to different positions on the surface of the touch plate 21, for example, as shown in fig. 4, the storage 30 can store at least a first pressure threshold and a second pressure threshold, the first pressure threshold and the second pressure threshold correspond to a first position P1 and a second position P2 on the touch plate 21, respectively, wherein the first position P1 and the second position P2 can be represented by coordinates, and the first pressure threshold is different from the second pressure threshold, and the distance from the first position P1 to the pressure sensor 23 is different from the distance from the second position P2 to the pressure sensor 23. For example, the first pressure threshold may be 190gf, the second pressure threshold may be 152gf, and the distance from the first position P1 to the pressure sensor 23 may be smaller than the distance from the second position P2 to the pressure sensor 23, but the storage 30 may store different pressure thresholds for each coordinate position on the surface of the touch pad 21.

In some embodiments, the storage 30 may be any type of fixed or removable Random Access Memory (RAM), Read-Only Memory (ROM), Flash Memory (Flash Memory), hard disk, or the like, or any combination thereof.

As shown in fig. 2 and 3, the processor 40 is electrically connected to the pressure sensor 23, the position sensor 24 and the storage 30 to obtain the different pressure thresholds (e.g. the first pressure threshold and the second pressure threshold), the touch position of the user and the pressing pressure value detected by the pressure sensor 23. In some embodiments, the pressure sensor 23, the position sensor 24, the storage 30 and the processor 40 may be disposed on the same circuit board 22 (as shown in fig. 2), or the storage 30 and the processor 40 may be disposed at other positions outside the circuit board 22.

In some embodiments, the Processor 40 may be a Central Processing Unit (CPU), or other Programmable Microprocessor (Microprocessor), Digital Signal Processor (DSP), Programmable controller, Application Specific Integrated Circuit (ASIC), Programmable Logic Device (PLD), or the like, for controlling and coordinating operations among units of the touch sensing module 1 and operations and data operations and Logic determination.

As shown in fig. 2 to 4, when the touch position of the user is located at different positions on the touch pad 21, the processor 40 compares the pressing pressure value with different pressure thresholds to determine whether to output a trigger signal, wherein the trigger signal can correspond to the control cursor to perform the clicking operation. Referring to fig. 9, which is a flowchart illustrating steps of a touch sensing method according to an embodiment of the invention, the processor 40 of the touch sensing device 1 of fig. 2 to 4 can perform the following steps S01 to S05 for touch sensing, and the hardware structure mentioned below can be disclosed with reference to the above embodiments of fig. 1 to 4, but is not limited to the invention.

As shown in fig. 9, in step S01, the touched position on the touch panel and the pressing pressure value generated by the pressed touched position are acquired. Referring to fig. 2 to 4, when a finger of a user touches the surface of the touch pad 21, the position sensor 24 can detect coordinates of the finger on the touch pad 21 to obtain a touched position of the finger, when the finger of the user clicks or presses the touched position, the pressure sensor 23 is pressed to sense a pressing pressure value at the touched position, and the processor 40 is electrically connected to the pressure sensor 23 and the position sensor 24 to obtain the touched position and the pressing pressure value.

As shown in fig. 9, in step S02, the first pressure threshold, the second pressure threshold, and the third pressure threshold are acquired. Specifically, as shown in fig. 1 to 4, the storage 30 may store more than two different pressure thresholds in advance to correspond to different positions on the touch pad 21, for convenience of description, the storage 30 stores three different pressure thresholds (a first pressure threshold, a second pressure threshold, and a third pressure threshold) in advance, and the processor 40 is electrically connected to the storage 30 to obtain the first pressure threshold, the second pressure threshold, and the third pressure threshold. However, the number of the pressure thresholds stored in the storage 30 depends on the number of the preset coordinate positions on the touch pad 21, for example, the number of the preset coordinate positions on the touch pad 21 is 100, and the storage 30 stores 100 different pressure thresholds to correspond to a plurality of coordinate positions respectively.

As shown in fig. 2 to 4, the first pressure threshold, the second pressure threshold and the third pressure threshold correspond to a first position P1, a second position P2 and a third position P3 on the touch plate 21, respectively, wherein the first position P1, the second position P2 and the third position P3 can be represented by coordinates, and the distance from the first position P1 to the pressure sensor 23, the distance from the second position P2 to the pressure sensor 23 and the distance from the third position P3 to the pressure sensor 23 are different.

In some embodiments, the above steps S01 and S02 may be performed in different orders or simultaneously.

As shown in fig. 9, when the touch position is at the first position, the trigger signal is output according to the pressing pressure value being greater than the first pressure threshold (step S03), when the touch position is at the second position, the trigger signal is output according to the pressing pressure value being greater than the second pressure threshold (step S04), and when the touch position is at the third position, the trigger signal is output according to the pressing pressure value being greater than the third pressure threshold (step S05). Specifically, as shown in fig. 2 to 4, after the processor 40 obtains the touch position of the user, it may first determine whether the touch position corresponds to the first position P1, the second position P2 or the third position P3 on the touch pad 21, and when the touch position of the user is located at different positions on the touch pad 21, the pressing pressure value is compared with different pressure thresholds to determine whether to output the trigger signal.

Specifically, as shown in fig. 3, in the case that the pressure threshold is not set, it is assumed that the pressure sensor 23 needs to sense a pressure value greater than 190gf to be triggered, the farther the user presses the position away from the pressure sensor 23 or closer to the pivot side 211 of the touch pad 21, the greater the pressing force is needed to enable the pressure sensor 23 to sense a pressure value greater than 190gf, for example, when the user presses the position at arrow L1, the force needed to press is 238gf, and when the user presses the position at arrow L2, the force needed to press is 380gf, the pressure sensor 23 can sense a pressure value greater than 190gf, and so on, so that the user needs to apply different forces when pressing different positions.

In the present embodiment, as the touch panel 21 is closer to the pivot side 211, the corresponding pressure threshold value, i.e., the setting is smaller, or as the touch panel 21 is closer to the pressure sensor 23, the corresponding pressure threshold value, i.e., the setting is larger. As shown in fig. 4, for example, in the present embodiment, the distance from the third position P3 to the pressure sensor 23 is greater than the distance from the second position P2 to the pressure sensor 23, the distance from the second position P2 to the pressure sensor 23 is greater than the distance from the first position P1 to the pressure sensor 23, the distance from the third position P3 to the pivot side 211 is less than the distance from the second position P2 to the pivot side 211, and the distance from the second position P2 to the pivot side 211 is less than the distance from the first position P1 to the pivot side 211, so that the first pressure threshold corresponding to the first position P1 is greater than the second pressure threshold corresponding to the second position P2, and the second pressure threshold corresponding to the second position P2 is greater than the third pressure threshold corresponding to the third position P3, for example, the first pressure threshold may be 190, the second pressure threshold may be 152gf, and the third pressure threshold may be 95 gf.

Therefore, as shown in fig. 3 and 4, when the touch position of the user is located at the first position and presses the touch pad 21 with a pressing force (as shown in fig. 4), the processor 40 outputs the trigger signal to control the cursor to perform the clicking operation as long as the pressing pressure value sensed by the pressure sensor 23 is greater than the first pressure threshold (190gf), otherwise, the processor 40 does not output the trigger signal if the pressing pressure value is less than or equal to the first pressure threshold. When the touch position of the user is at the second position, the processor 40 outputs the trigger signal as long as the pressing pressure value sensed by the pressure sensor 23 is greater than the second pressure threshold (152gf), so that the touch position of the user can be triggered at the same or similar pressing force at the second position. When the touch position of the user is located at the third position, the pressing pressure value sensed by the pressure sensor 23 is larger than the third pressure threshold (95gf), and the processor 40 outputs the trigger signal, so that the touch position of the user can be triggered by the same or similar pressing force when the touch position is located at the third position, and when the user presses different positions of the touch plate 21, the trigger signal can be generated by the same or similar pressing force, so that the touch plate 21 is more humanized and comfortable in operation.

As shown in fig. 4, the touch panel 21 may be further divided into a plurality of regions, and the pressure thresholds corresponding to a plurality of positions of the touch panel 21 in the same region may be set to be the same, in this embodiment, the surface of the touch panel 21 is divided into four regions, namely, a first region a1, a second region a2, a third region A3 and a fourth region a4, where each region is rectangular, but the shape is not limited thereto, and the number of the regions divided by the touch panel 21 may be two or more, and the regions may have other shapes. The first area a1, the second area a2, the third area A3, and the fourth area A4 are sequentially arranged from the opposite side 212 toward the pivot side 211, that is, the second area a2 is adjacent to the pivot side 211 relative to the first area a1, the third area A3 is adjacent to the pivot side 211 relative to the second area a2, the fourth area A4 is adjacent to the pivot side 211 relative to the third area A3, the first position P1 is located in the first area a1, the second position P2 and the third position P3 are located in the second area a2, the second pressure threshold and the third pressure threshold corresponding to the second position P2 and the third position P3 in the same area (i.e., the second area a2) respectively can be set to be the same, and both the second pressure threshold and the third pressure threshold are smaller than the first pressure threshold corresponding to the first position P1. Similarly, the pressure thresholds corresponding to the positions in the first area a1, the third area A3, or the fourth area a4 may also be set to be the same, which is not repeated herein.

Fig. 5 is an exploded perspective view of a second embodiment of the touch sensing device of the invention, and fig. 6 is a top view of the second embodiment of the touch sensing device of the invention, as shown in fig. 5 and fig. 6, in the present embodiment, a touch pad 21 includes a first side 213 and a second side 214 opposite to each other, the first side 213 and the second side 214 are connected between a pivotal side 211 and an opposite side 212, that is, the pivotal side 211, the opposite side 212, the first side 213 and the second side 214 surround an outer circumference of the touch pad 21. The difference between the present embodiment and the embodiment of fig. 4 is that the pressure sensor 23a of the present embodiment includes a first pressure sensing unit 231 and a second pressure sensing unit 232, and the first pressure sensing unit 231 and the second pressure sensing unit 232 are disposed at an interval and adjacent to the first side 213 and the second side 214, respectively, so that when the touch pad 21 is pressed by a user, the acting force can be dispersed to the first pressure sensing unit 231 and the second pressure sensing unit 232, thereby reducing the warpage or shaking of the touch pad 21 caused by pressing, and improving the stability of use.

In this embodiment, when the user presses the touch pad 21, the first pressure sensing unit 231 can detect the pressing of the touch position to obtain a first pressing pressure value, and the second pressure sensing unit 232 can detect the pressing of the touch position to obtain a second pressing pressure value, where the pressing pressure values in the above embodiments are the sum of the first pressing pressure value and the second pressing pressure value.

As shown in fig. 7 and fig. 8, which are an exploded perspective view and a top view of a touch sensing device according to a third embodiment of the invention, a difference between the present embodiment and the first embodiment is that a touch plate 21 'of a touch panel 20' of the present embodiment includes a plurality of pivoting portions 215, each pivoting portion 215 is a partial surface area of the touch plate 21 ', and the plurality of pivoting portions 215 are respectively located at four corners of the touch plate 21'. In the embodiment, the block bodies 103 are respectively disposed at four corners of the top surface 101 of the substrate 10, and the pivot portions 215 of the touch plate 21' can be respectively assembled and fixed on the block bodies 103 by adhesion, buckling, or locking. The pressure sensor 23b is located between the pivot parts 215, wherein the pressure sensor 23b is located between the pivot parts 215 corresponding to the center of the circuit board 22 ', and the first area a1 ', the second area a2 ' and the third area A3 ' of the touch plate 21 ' are square rings with different sizes and are concentrically arranged with the pressure sensor 23b as the center.

Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes and modifications can be made without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (16)

1. A touch sensing device, comprising:

a substrate;

a touch panel disposed on the substrate, the touch panel including a touch pad and a circuit board, the circuit board being disposed between the substrate and the touch pad, the circuit board including a pressure sensor and a position sensor, the position sensor detecting and obtaining a touch position on the touch pad, the pressure sensor detecting the touch position being pressed to obtain a pressing pressure value;

a memory storing a first pressure threshold and a second pressure threshold, the first pressure threshold and the second pressure threshold corresponding to a first position and a second position on the touch pad, respectively, the first pressure threshold being different from the second pressure threshold, a distance from the first position to the pressure sensor being different from a distance from the second position to the pressure sensor; and

the processor is electrically connected with the pressure sensor, the position sensor and the storage, and obtains the first pressure threshold value, the second pressure threshold value, the touch position and the pressing pressure value;

when the touch position is located at the first position, the processor outputs a trigger signal according to the fact that the pressing pressure value is larger than the first pressure threshold value;

when the touch position is located at the second position, the processor outputs the trigger signal according to the fact that the pressing pressure value is larger than the second pressure threshold value.

2. The touch sensing device of claim 1, wherein a distance from the first location to the pressure sensor is less than a distance from the second location to the pressure sensor, and the second pressure threshold is less than the first pressure threshold.

3. The touch sensing device of claim 2, wherein the touch plate comprises a plurality of pivoting portions at four corners of the touch plate, and the pressure sensor is located between the pivoting portions.

4. The touch sensing device as recited in claim 1, wherein the touch pad comprises a pivot side pivotally disposed on a side of the substrate, the second position is adjacent to the pivot side relative to the first position, and the second pressure threshold is less than the first pressure threshold.

5. The touch sensing device of claim 4, wherein the touch pad includes an opposite side opposite the pivot side, the pressure sensor being disposed between the opposite side and the substrate.

6. The touch sensing device of claim 5, wherein the touch pad includes a first side and a second side opposite to each other, the first side and the second side being connected between the pivot side and the opposite side, the pressure sensor includes a first pressure sensing unit and a second pressure sensing unit, the first pressure sensing unit and the second pressure sensing unit are spaced apart from each other and are respectively adjacent to the first side and the second side.

7. The touch sensing device of claim 1, wherein the pressure sensor comprises a first pressure sensing unit and a second pressure sensing unit, the first pressure sensing unit detects the touch position being pressed to obtain a first pressing pressure value, the second pressure sensing unit detects the touch position being pressed to obtain a second pressing pressure value, and the pressing pressure value is the sum of the first pressing pressure value and the second pressing pressure value.

8. The touch sensing device of claim 1, wherein the memory stores a third pressure threshold, the third pressure threshold corresponds to a third position on the touch pad, the second position is between the first position and the third position, and the processor outputs the trigger signal according to the pressing pressure value being greater than the third pressure threshold when the touch position is at the third position.

9. The touch sensing device of claim 8, wherein the touch pad comprises a first area and a second area, the second area is far away from the pressure sensor relative to the first area, the first location is within the first area, the second location and the third location are within the second area, and the second pressure threshold is equal to the third pressure threshold.

10. The touch sensing device of claim 8, wherein the third location is remote from the pressure sensor relative to the second location, and the third pressure threshold is less than the second pressure threshold.

11. A touch sensing method, comprising:

(a) acquiring a touch position on a touch pad and a pressing pressure value generated by pressing the touch position;

(b) obtaining a first pressure threshold and a second pressure threshold, wherein the first pressure threshold and the second pressure threshold correspond to a first position and a second position on the touch pad, respectively, and the first pressure threshold is different from the second pressure threshold;

(c) when the touch position is located at the first position, outputting a trigger signal according to the fact that the pressing pressure value is larger than the first pressure threshold value; and

(d) when the touch position is located at the second position, the trigger signal is output according to the fact that the pressing pressure value is larger than the second pressure threshold value.

12. The touch sensing method of claim 11, wherein the touch pad of step (b) includes a pivoted side, the second position is adjacent to the pivoted side relative to the first position, and the second pressure threshold is less than the first pressure threshold.

13. The touch sensing method of claim 11, wherein the pressing pressure value in the step (a) is a sum of a first pressing pressure value obtained by a first pressure sensing unit detecting the pressing of the touch location and a second pressing pressure value obtained by a second pressure sensing unit detecting the pressing of the touch location.

14. The touch sensing method of claim 12, wherein the step (b) further comprises: obtaining a third pressure threshold corresponding to a third position on the touch pad, the second position being between the first position and the third position; after step (b) further comprising: when the touch position is located at the third position, the trigger signal is output according to the fact that the pressing pressure value is larger than the third pressure threshold value.

15. The touch sensing method of claim 14, wherein the touch pad of step (b) comprises a first area and a second area, the second area is adjacent to the pivotal side relative to the first area, the first position is located in the first area, the second position and the third position are located in the second area, and the second pressure threshold is equal to the third pressure threshold.

16. The touch sensing method of claim 14, wherein the third position of the step (b) is adjacent to the pivot side relative to the second position, and the third pressure threshold is smaller than the second pressure threshold.

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