Touch sensing method

Abstract

A touch sensing method for a touch panel includes: entering a first touch sensing procedure and executing a waterless mode; determining whether there is water on the touch panel in the first touch sensing procedure; when water on the touch panel in the first touch sensing procedure is detected, entering a second touch sensing procedure and executing a water mode; determining whether there is water on the touch panel in the second touch sensing procedure; and when no water on the touch panel in the second touch sensing procedure is detected, entering the first touch sensing procedure and executing the waterless mode. In this way, the power consumption of the touch panel is smaller.

Description

Technical Field

[0001] This disclosure relates to a touch technology, and more particularly to a touch sensing method. Background Technology

[0002] With the development of technology, touch panels have been applied to various electronic devices. Users can touch the touch panel of an electronic device, and the processor in the device can determine the touch location and execute the corresponding operation. However, when there is water on the touch panel, the mutual capacitance will change, leading to misjudgment. Summary of the Invention

[0003] Some embodiments disclosed herein relate to a touch sensing method for a touch panel. The touch sensing method includes: entering a first touch sensing program and executing a waterless mode; determining whether there is water on the touch panel in the first touch sensing program; when water is detected on the touch panel in the first touch sensing program, entering a second touch sensing program and executing a water present mode; determining whether there is water on the touch panel in the second touch sensing program; and when no water is detected on the touch panel in the second touch sensing program, entering the first touch sensing program and executing the waterless mode.

[0004] In some embodiments, the touch panel includes multiple sensing electrodes. In a waterless mode, these sensing electrodes are activated in turn.

[0005] In some embodiments, in a water-rich mode, all of these sensing electrodes are driven simultaneously.

[0006] In some embodiments, determining whether there is water on the touch panel during the first touch sensing process involves: when the sensing electrodes are coupled in a first direction, determining whether a first sensing signal related to a first capacitance value has changed; and when the first sensing signal has not changed, determining that there is water on the touch panel and entering the second touch sensing process.

[0007] In some embodiments, the touch sensing method further includes: when a first sensing signal changes, and the sensing electrodes are coupled in a second direction, determining whether a second sensing signal related to a first capacitance value has changed; when the second sensing signal does not change, determining that there is water on the touch panel; and when the second sensing signal changes, determining a touch position.

[0008] In some embodiments, determining whether there is water on the touch panel during the second touch sensing process involves determining whether a third sensing signal related to a first capacitance value and a second capacitance value has changed when a first group of sensing electrodes is driven and a second group of sensing electrodes is not driven.

[0009] In some embodiments, a first group of the sensing electrodes is located in a first column, a second group of the sensing electrodes is located in a second column, and the second column is adjacent to the first column.

[0010] In some embodiments, a first group of the sensing electrodes is located in a first row, a second group of the sensing electrodes is located in a second row, and the second row is adjacent to the first row.

[0011] In some embodiments, the first set of sensing electrodes is interleaved with the second set of sensing electrodes.

[0012] In some embodiments, the first capacitance value is related to a first capacitance between one of the sensing electrodes and a ground terminal, and the second capacitance value is related to a second capacitance between two of the sensing electrodes.

[0013] In some embodiments, in a water-containing mode, multiple target sensing electrodes among the sensing electrodes are simultaneously activated. These target sensing electrodes are located within a range, and the range corresponds to a location of water.

[0014] In some embodiments, the touch panel is a touch and organic light-emitting diode display panel. Attached Figure Description

[0015] To make the above and other objects, features, advantages and embodiments disclosed herein more apparent and understandable, the accompanying drawings are described below:

[0016] Figure 1 This is a schematic diagram of a touch device illustrated according to some embodiments of the present disclosure;

[0017] Figure 2 It is illustrated in accordance with some embodiments of this disclosure. Figure 1 A schematic diagram of a touch device;

[0018] Figure 3 This is a flowchart illustrating a touch sensing method according to some embodiments of the present disclosure;

[0019] Figure 4A as well as Figure 4B It is illustrated in accordance with some embodiments of this disclosure. Figure 2 A diagram illustrating the touch panel and water.

[0020] Figure 5A as well as Figure 5B It is illustrated in accordance with some embodiments of this disclosure. Figure 2 A diagram illustrating the touch panel and a finger;

[0021] Figure 6A as well as Figure 6B It is illustrated in accordance with some embodiments of this disclosure. Figure 2A diagram illustrating the touch panel with water and fingers;

[0022] Figure 6C It is illustrated in accordance with some embodiments of this disclosure. Figure 6B A diagram illustrating the touch panel with water and fingers;

[0023] Figure 7A as well as Figure 7B It is illustrated in accordance with some embodiments of this disclosure. Figure 4A A diagram illustrating the touch panel and water.

[0024] Figure 8 It is illustrated in accordance with some embodiments of this disclosure. Figure 2 A diagram illustrating the touch panel and water.

[0025] Figure 9 It is a drawing and Figure 7B Another related embodiment;

[0026] Figure 10 It is a drawing and Figure 7B Another related embodiment;

[0027] Figure 11A as well as Figure 11B This is a schematic diagram illustrating, according to some embodiments of the present disclosure, the incorporation of the sensing electrodes in a first direction; and

[0028] Figure 12A as well as Figure 12B This is a schematic diagram illustrating the incorporation of the sensing electrodes in a second direction according to some embodiments of this disclosure.

[0029] [Symbol Explanation]

[0030] 100: Touch screen device

[0031] 110: Processor

[0032] 120: Touch panel

[0033] 300: Touch Sensing Method

[0034] M1, M2: Multiplexer

[0035] S1, S2: Sensing circuits

[0036] E, E1, E2: Sensing electrodes

[0037] CS, CP, CF: Capacitors

[0038] VTX: Drive signal

[0039] VO: Sensing signal

[0040] S310, S320, S330, S340: Operation

[0041] W1, W2, W3, W4: Water

[0042] F1, F2: Fingers

[0043] RW3, RW4: Range

[0044] R1,R2,R1',R2': Sensing area

[0045] D2: Drive circuit Detailed Implementation

[0046] refer to Figure 1 . Figure 1 This is a schematic diagram of a touch device 100 illustrated according to some embodiments of this disclosure. Figure 1 For example, the touch device 100 includes a processor 110 and a touch panel 120. The processor 110 is coupled to and controls the touch panel 120. In some embodiments, the touch panel 120 is a touch and organic light-emitting diode display panel.

[0047] refer to Figure 2 . Figure 2 It is illustrated in accordance with some embodiments of this disclosure. Figure 1 A schematic diagram of the touch device 100.

[0048] by Figure 2 For example, touch panel 120 includes a plurality of sensing electrodes E. In this example, the sensing electrodes E in touch panel 120 are arranged in 20 columns and 36 rows. In other words, there are 720 sensing electrodes E in touch panel 120. However, this disclosure does not... Figure 2 The configuration is limited. In this example, the touch panel 120 also includes multiple multiplexers M1-M2, multiple sensing circuits S1, and multiple sensing circuits S2. The sensing circuits S1 are coupled to the multiplexers M1, and the sensing circuits S2 are coupled to the multiplexers M2.

[0049] Taking region R as an example, it has 9 sensing electrodes, of which 3 sensing electrodes E1 receive the drive signal VTX, and 6 sensing electrodes E2 are coupled to ground. Specifically, the sensing circuit S2 includes a positive input terminal, a negative input terminal, and an output terminal. The positive input terminal of the sensing circuit S2 receives the drive signal VTX, and the negative input terminal of the sensing circuit S2 couples the drive signal VTX to the corresponding sensing electrode E1 (shown in the center) through a negative feedback loop mechanism. The output terminal of the sensing circuit S2 outputs the sensing signal VO of the corresponding sensing electrode E1. The other sensing electrodes E1 operate similarly.

[0050] In this configuration, for each sensing electrode E1 (shown in the center) coupled to the sensing circuit S2, a capacitor CS (self-capacitance) is formed between the sensing electrode E1 and ground. When the voltage of sensing electrode E1 differs from the voltages of adjacent sensing electrodes E2, two capacitors CP (mutual capacitance) are formed between sensing electrode E1 and adjacent sensing electrodes E2. A finger can affect capacitor CS but not capacitor CP. Conversely, water can affect capacitor CP but not capacitor CS. Additionally, a capacitor CF is formed between the output terminal and the negative input terminal of the sensing circuit S2.

[0051] refer to Figure 3 . Figure 3 This is a flowchart illustrating a touch sensing method 300 according to some embodiments of this disclosure. Figure 3 For example, the touch sensing method 300 includes operations S310, S320, S330 and S340.

[0052] In some embodiments, Figure 1 The processor 110 in the middle can perform operations S310, S320, S330 and S340.

[0053] In operation S310, the processor 110 enters the first touch sensing program for the touch panel 120 and executes the waterless mode. (See reference...) Figure 4A . Figure 4A It is illustrated in accordance with some embodiments of this disclosure. Figure 2 A schematic diagram of the touch panel 120 and water W1. Figure 4A For example, these sensing electrodes E are driven alternately in a waterless mode. Specifically, in a first time interval, the leftmost first column and the rightmost first column of these sensing electrodes E are driven by the drive signal VTX. In a second time interval, the leftmost second column and the rightmost second column of these sensing electrodes E are driven by the drive signal VTX (e.g., ...). Figure 4A And so on. Undriven sensing electrodes E are coupled to ground to save power. Processor 110 can then determine the power consumption based on these sensing signals VO corresponding to the driven sensing electrodes E (as shown in the diagram). Figure 2 )Execute the first sensing procedure. In Figure 4A In the configuration, the sensing signal VO_0 of one of the driven sensing electrodes E can be obtained from the following formula (1):

[0054]

[0055] Where dVTX is the amplitude of the driving signal VTX. In other words, dVTX is equal to the difference between the highest and lowest values ​​of the driving signal VTX.

[0056] Water W1 affects capacitance CP. Therefore, when water W1 is present on a sensing electrode E, the sensing signal VO_0 in formula (1) for this sensing electrode E will change. Thus, the processor 110 can determine that an object is located on this sensing electrode E.

[0057] In operation S320, the processor 110 determines whether there is water W1 on the touch panel 120 in the first touch sensing process. (Reference) Figure 4B . Figure 4B It is illustrated in accordance with some embodiments of this disclosure. Figure 2 A schematic diagram of the touch panel 120 and water W1. Figure 4B For example, all of these sensing electrodes E are driven by a drive signal VTX. Furthermore, these sensing electrodes E are combined in a first direction (e.g., the first direction corresponds to a row). In this example, the sensing electrodes E of the first row are combined to form two sensing regions R1 located on the left and right sides of the first row, and each sensing region R1 contains 10 sensing electrodes E. How to... Figure 4B Combining these sensing electrodes E will Figure 11A The relevant paragraph description. In Figure 4B In the configuration, the sensing signal VO_1 of one sensing area R1 can be obtained from the following formula (2):

[0058]

[0059] As mentioned earlier, water W1 does not affect capacitor CS. Accordingly, when water W1 is located on a sensing area R1, the sensing signal VO_1 of this sensing area R1 in formula (2) will not change. Thus, processor 110 can further determine that the object is water (e.g., water W1). In other words, the determination result of operation S320 is "yes" (water W1 is located on touch panel 120) and touch sensing method 300 enters operation S330, processor 110 controls touch panel 120 to enter the second touch sensing program to execute the water mode.

[0060] refer to Figure 5A as well as Figure 5B . Figure 5A as well as Figure 5B It is illustrated in accordance with some embodiments of this disclosure. Figure 2 A schematic diagram of the touch panel 120 and the finger F1.

[0061] Compared to Figure 4A F1 finger will affect Figure 5A The capacitance CS in the equation. Accordingly, when finger F1 is placed on a sensing electrode E, the sensing signal VO_0 of the sensing electrode E changes in equation (1). Thus, the processor 110 can determine that there is an object on this electrode E.

[0062] Compared to Figure 4B F1 finger will affect Figure 5B The capacitance CS in the sensor. Accordingly, when finger F1 is located on sensing area R1, the sensing signal VO_1 in this sensing area R1 changes. Thus, processor 110 can further determine that the object is a finger (e.g., finger F1). In other words, the determination result of operation S320 is "no". Then, returning to operation S310, processor 110 determines the touch position of finger F1 and still executes the waterless mode in the first touch sensing program. Figure 5A For example, in each time interval, only two columns are driven by the drive signal VTX. In this way, power consumption can be saved.

[0063] refer to Figure 6A as well as Figure 6B . Figure 6A as well as Figure 6B It is illustrated in accordance with some embodiments of this disclosure. Figure 2 A schematic diagram of the touch panel 120, water W2, and finger F2.

[0064] exist Figure 6A In the process, finger F2 affects capacitance CS. Accordingly, when finger F2 is located on a sensing electrode E, the sensing signal VO_0 of this sensing electrode E changes in formula (1). In addition, water W2 affects capacitance CP. Accordingly, when water W2 is located on another sensing electrode E, the sensing signal VO_0 of this other sensing electrode E changes in formula (1). Thus, processor 110 can determine that there are two objects on touch panel 120.

[0065] exist Figure 6B In this context, finger F2 affects capacitance CS. Accordingly, when finger F2 and water W2 are located on a sensing area R1 (e.g., finger F2 and water W2 are located on the same sensing area R1), the sensing signal VO_1 in this sensing area R1 changes. Thus, processor 110 can further determine that the two objects contain at least one finger (e.g., finger F2).

[0066] refer to Figure 6C . Figure 6C It is illustrated in accordance with some embodiments of this disclosure. Figure 6B A schematic diagram of the touch panel 120, water W2, and finger F2.

[0067] by Figure 6C For example, all sensing electrodes E are driven by a drive signal VTX. Furthermore, these sensing electrodes E are combined in a second direction (e.g., the second direction corresponds to a column). In this example, the sensing electrodes E located in the same column are combined into a sensing region R2, and each sensing region R2 contains 36 sensing electrodes E. How to... Figure 6CCombining these sensing electrodes E will Figure 12A The relevant paragraph description. In Figure 6C In the configuration, the sensing signal VO_2 of one sensing area R2 can be obtained from the following formula (3):

[0068]

[0069] exist Figure 6C In this process, finger F2 affects capacitor CS, but water does not. Therefore, when finger F2 and water W2 are located on different sensing areas R2, the sensing signal VO_2 corresponding to finger F2 in formula (3) will change, while the sensing signal VO_2 corresponding to water W2 in formula (3) will not change. Thus, processor 110 can determine which object is a hand (e.g., finger F2) and which object is water (e.g., water W2) based on the sensing signal VO_2. Processor 110 can determine the touch position of finger F2 based on the changed sensing signal VO_2. Alternatively, if the sensing signal VO_2 remains unchanged, the determination result of operation S320 is "yes" (water W2 is on touch panel 120), therefore touch sensing method 300 enters operation S330.

[0070] In operation S330, processor 110 enters the second touch sensing program and executes the water-enabled mode. (Reference) Figure 7A . Figure 7A This is a schematic diagram of the touch panel 120 and water W1 shown in Figure 4, according to some embodiments of this disclosure. Figure 7A As shown, in the water-containing mode, all sensing electrodes E are driven simultaneously. Specifically, all sensing electrodes E are driven within the same time interval. In this example, except for two columns from... Figure 2 In addition to being driven by the drive signals VTX of the sensing circuits S1 and S2, the other sensing electrodes E are driven by the drive signal VTX from at least one drive circuit D2 (e.g., an operational amplifier). The drive signal VTX from the drive circuit D2 is called a load-free driving (LFD) signal. The processor 110 can determine the driving electrode E based on the sensing signal VO (e.g., VTX from the drive circuit D2) corresponding to these driven sensing electrodes E. Figure 2 (As shown) Execute the second touch sensing procedure. In Figure 7A In the configuration, the sensing signal VO_0 of a driven sensing electrode E can be obtained from the following formula (4):

[0071]

[0072] Water W1 does not affect capacitor CS. Therefore, when water W1 is on a sensing electrode E, the sensing signal VO_0 of this sensing electrode E in formula (4) will not change. Thus, processor 110 will not sense this object (e.g., water W1). Since no object is sensed, processor 110 will naturally not determine the touch position of the object (e.g., water W1).

[0073] In operation S340, processor 110 determines whether there is water W1 on touch panel 120 in the second touch sensing process. (Reference) Figure 7B . Figure 7B It is illustrated in accordance with some embodiments of this disclosure. Figure 4A A schematic diagram of the touch panel 120 and water W1. Figure 7B For example, a first group of sensing electrodes E is driven by a drive signal VTX, and a second group of sensing electrodes E is not driven, wherein the second group of sensing electrodes E is adjacent to the first group of sensing electrodes E. In this example, the sensing electrodes E in the leftmost first column are driven by the drive signal VTX, the sensing electrodes E in the leftmost second column are not driven, and so on. Equivalently, the undriven column is adjacent to the driven column. Figure 7B In the configuration, the sensing signal VO_3 of one of the driven electrodes E can be obtained from the following formula (5):

[0074]

[0075] Water W1 affects capacitance CP. Accordingly, when water W1 is on one of the driven sensing electrodes E, the sensing signal VO_3 of that driven sensing electrode E in formula (5) will change. Thus, processor 110 can further determine that there is water (e.g., water W1) on touch panel 120. In other words, the determination result of operation S340 is "yes" (water W1 is on touch panel 120) and touch sensing method 300 enters operation S330. In operation S330, processor 110 controls touch panel 120 to continue executing the water-containing mode in the execution of the second touch sensing program.

[0076] Conversely, when water W1 is removed, the sensing signal VO_3 of the driven sensing electrode E in formula (5) will not change. Thus, the processor 110 can further determine that there is no water on the touch panel 120. In other words, the determination in operation S340 is "no" (water W1 is not on the touch panel 120) and the touch sensing method 300 enters operation S310. In operation S310, the processor 110 enters the first touch sensing program and executes the waterless mode.

[0077] by Figure 4A , Figure 5A as well as Figure 6AFor example, in each time interval, only two columns are driven by the drive signal VTX in the waterless mode. Figure 7A For example, in the water-containing mode, all sensing electrodes E are driven by the drive signal VTX. Thus, the power consumption in the waterless mode will be lower than that in the water-containing mode.

[0078] As mentioned earlier, in Figure 6C In this process, processor 110 can determine which object is water W2. In other words, processor 110 can determine the location of water W2. Accordingly, in some embodiments, processor 110 can control the activation of some target sensing electrodes E located within a range corresponding to the location of water W2, while other sensing electrodes E are not activated to save energy. (See reference...) Figure 8 . Figure 8 It is illustrated in accordance with some embodiments of this disclosure. Figure 2 A schematic diagram of the touch panel 120 and water W3 and water W4. Figure 8 For example, besides being from Figure 2 In addition to the two columns driven by the drive signals VTX of the sensing circuits S1 and S2, the processor 110 can control other target sensing electrodes E located in the range RW3-RW4 to be driven by signals from... Figure 7A The at least one driving circuit D2 is driven by the driving signal VTX (LFD signal), wherein the range RW3-RW4 corresponds to the position of water W3-W4 (e.g., the range RW3-RW4 is located below water W3-W4).

[0079] As mentioned earlier, the waterless mode ( Figure 4A , Figure 5A as well as Figure 6A The power consumption is lower than that of the water-enabled mode. Figure 7A The power consumption of ). Additionally. Figure 8 The power consumption of the water-enabled mode is lower than Figure 7A The power consumption in the water-enabled mode.

[0080] Furthermore, the aforementioned sensing signals VO_1 and VO_2 are used to determine whether the object is water or a finger. These determinations do not require a very high signal-to-noise ratio (SNR). In other words, the bias current, sensing time, and amplitude of the drive signal in the sensing circuit S2 used to make these determinations can be reduced. Thus, power consumption can be further reduced.

[0081] refer to Figure 9 . Figure 9 It is a drawing and Figure 7BAnother related embodiment. In some embodiments, a first group of the sensing electrodes E is driven by a drive signal VTX, and a second group of the sensing electrodes E is not driven, wherein the second group of the sensing electrodes E is adjacent to the first group of the sensing electrodes E. In this example, the sensing electrodes E in the topmost first row are driven by the drive signal VTX, the sensing electrodes E in the topmost second row are not driven, and so on. Equivalently, the undriven rows are adjacent to the driven rows. Figure 9 In the configuration, the sensing signal VO_3 of one of the driven electrodes E can be obtained from the above formula (5).

[0082] refer to Figure 10 . Figure 10 It is a drawing and Figure 7B Another related embodiment. In some embodiments, a first group of the sensing electrodes E is driven by a drive signal VTX, and a second group of the sensing electrodes E is not driven, wherein the second group of the sensing electrodes E is adjacent to the first group of the sensing electrodes E. In this example, the first group and the second group of the sensing electrodes E are interleaved. Specifically, four undriven sensing electrodes E are adjacent to one driven sensing electrode E. Figure 10 In the configuration, the sensing signal VO_3 of the sensing electrode E can be obtained from the following formula (6):

[0083]

[0084] Figure 11A as well as Figure 11B This is a schematic diagram illustrating the incorporation of the sensing electrodes in a first direction according to some embodiments of this disclosure.

[0085] by Figure 11A as well as Figure 2 For example, multiplexer M1 selects the sensing electrodes E in a left-hand sensing region R1 and couples these sensing electrodes E in sensing region R1 to a sensing circuit S1. Similarly, multiplexer M2 selects the sensing electrodes E in a right-hand sensing region R1 and couples these sensing electrodes E in sensing region R1 to a sensing circuit S2. Other sensing regions have similar architectures and will not be described further here. Thus, all sensing regions will be combined in a first direction (e.g., the first direction corresponds to a row), and sensing electrodes E in the same row will be combined into two sensing regions R1.

[0086] by Figure 11B as well as Figure 2 For example, Figure 11B and Figure 11A One of the main differences between them is that, Figure 11BIn, the sensing electrodes E on the same row are combined into a single sensing region R1'. The multiplexer M1 selects the sensing electrodes E in an upper sensing region R1' and couples the sensing electrodes E in the sensing region R1' to a sensing circuit S1. Similarly, the multiplexer M2 selects the sensing electrodes E in a lower sensing region R1' and couples the sensing electrodes E in the sensing region R1' to a sensing circuit S2.

[0087] Figure 12A and Figure 12B is a schematic diagram of combining the sensing electrodes in a second direction according to some embodiments of the present disclosure.

[0088] taking Figure 12A and Figure 2 as an example, the multiplexer M1 selects the sensing electrodes E in a left sensing region R2 and couples the sensing electrodes E in the sensing region R2 to a sensing circuit S1. Similarly, the multiplexer M2 selects the sensing electrodes E in a right sensing region R2 and couples the sensing electrodes E in the sensing region R2 to a sensing circuit S2. Other sensing regions have similar structures, and thus will not be repeated herein. In this way, all sensing regions are combined in the second direction (for example, the second direction corresponds to a column), and the sensing electrodes E on the same column are combined into a single sensing region R2.

[0089] taking Figure 12B and Figure 2 as an example, Figure 12B and Figure 12A one of the main differences between is that, in Figure 12B , the sensing electrodes E on the same column are combined into two sensing regions R2'. The multiplexer M1 selects the sensing electrodes E in an upper sensing region R2' and couples the sensing electrodes E in the sensing region R2' to a sensing circuit S1. Similarly, the multiplexer M2 selects the sensing electrodes E in a lower sensing region R2' and couples the sensing electrodes E in the sensing region R2' to a sensing circuit S2.

[0090] it should be noted that, Figure 2 the multiplexers M1-M2 in are omitted in Figure 11A , Figure 11B , Figure 12A and Figure 12B for ease of understanding.

[0091] in summary, in the present disclosure, the power consumption of the touch panel is lower.

[0092] Although this disclosure has been described above with reference to embodiments, it is not intended to limit this disclosure. Any person skilled in the art may make various modifications and refinements without departing from the spirit and scope of this disclosure. Therefore, the scope of protection of this disclosure shall be determined by the appended claims.

Claims

1. A touch sensing method for a touch panel, characterized in that, The touch panel includes multiple sensing electrodes, and the touch sensing method includes: Entering a first touch sensing program, wherein the first touch sensing program includes: Execute a waterless mode, wherein in this waterless mode, the plurality of sensing electrodes are driven in turn; and Determining whether there is water on the touch panel during the first touch sensing process includes: When the plurality of sensing electrodes are combined in a first direction to form a first sensing region, it is determined whether a first sensing signal of the first sensing region has changed; as well as When the first sensing signal does not change, it is determined that there is water on the touch panel; When water is detected on the touch panel in the first touch sensing process, a second touch sensing process is initiated, wherein the second touch sensing process includes: Execute a water-containing mode, wherein all the sensing electrodes are simultaneously driven; and Determine whether there is water on the touch panel during the second touch sensing process; and When it is detected that there is no water on the touch panel in the second touch sensing program, the first touch sensing program is entered to execute the waterless mode.

2. The touch sensing method as described in claim 1, characterized in that, The first sensing signal is related to a first capacitance value, and the first capacitance value is related to a first capacitance between one of the plurality of sensing electrodes and a ground terminal.

3. The touch sensing method as described in claim 2, characterized in that, Also includes: When the first sensing signal changes, in the case where the plurality of sensing electrodes are combined in a second direction to form a second sensing region, it is determined whether a second sensing signal of the second sensing region has changed, wherein the second sensing signal is related to the first capacitance value; When the second sensing signal does not change, it is determined that there is water on the touch panel; and When the second sensing signal changes, a touch position is determined.

4. The touch sensing method as described in claim 3, characterized in that, The second touch sensing process determines whether there is water on the touch panel: When a first group of the plurality of sensing electrodes is driven and a second group of the plurality of sensing electrodes is not driven, it is determined whether a third sensing signal related to the first capacitance value and a second capacitance value has changed, wherein the second capacitance value is related to a second capacitance between two of the plurality of sensing electrodes.

5. The touch sensing method as described in claim 4, characterized in that, The first group of the plurality of sensing electrodes is located in a first column, the second group of the plurality of sensing electrodes is located in a second column, and the second column is adjacent to the first column.

6. The touch sensing method as described in claim 4, characterized in that, The first group of the plurality of sensing electrodes is located in a first row, the second group of the plurality of sensing electrodes is located in a second row, and the second row is adjacent to the first row.

7. The touch sensing method as described in claim 4, characterized in that, The first group of the plurality of sensing electrodes is interleaved with the second group of the plurality of sensing electrodes.

8. The touch sensing method as described in claim 1, characterized in that, The touch panel is a touch and organic light-emitting diode display panel.

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