Touch device and operating method for touch device

Abstract

The invention provides a touch device and an operation method for the touch device. The touch device comprises a plurality of touch keys, a plurality of controllers and a processing circuit. The plurality of controllers group a plurality of selected touch keys among the plurality of touch keys into at least one touch key group. Each of the at least one touch key group includes at least two selected touch keys. When a plurality of selected touch keys of a first touch key group in the at least one touch key group are simultaneously touched, the processing circuit sequentially provides a plurality of touch driving signals for the first touch key group and receives a plurality of touch sensing signal groups corresponding to the plurality of touch driving signals. When the plurality of touch sensing signal groups indicate that the plurality of selected touch keys of the first touch key group are simultaneously touched, the processing circuit judges that the touch of the first touch key group is effective touch.

Description

Technical Field

[0001] The present invention relates to a touch device and an operating method for the touch device, and in particular to a touch device and an operating method capable of having an anti-interference function. Background Art

[0002] Current touch devices (such as equipment, household appliances or electronic devices) include multiple touch keys. Users can use multiple touch keys to control the touch device to perform functions corresponding to the user's touch behavior. In order to improve the diversity of functions. The touch device is introduced with multi-finger touch operation. For example, the multi-finger touch operation is that the user can simultaneously operate (such as touching or pressing) the first touch key and the second touch key of the multiple touch keys to make the touch device perform the function corresponding to the multi-finger touch operation. In addition, the user only operates the first touch key to control the touch device to perform a single-finger touch operation.

[0003] However, when one of the touch keys involved in the multi-touch operation is operated by the user, the other touch keys involved in the multi-touch operation may be interfered with. For example, when the first touch key involved in the multi-touch operation is operated by the user (i.e., single-finger touch operation), the second touch key may be interfered with. Therefore, the touch device will misjudge that the interfered second touch key is being touched or pressed by the user. Therefore, the touch device will perform the function corresponding to the multi-touch operation. The above situation will be more serious in a high-noise environment.

[0004] It can be seen that how to enable the touch control device to have an anti-interference function to correctly determine whether a multi-finger touch operation occurs is one of the research focuses of those skilled in the art. Summary of the invention

[0005] The invention provides a touch control device with anti-interference function and an operation method.

[0006] The touch device of the present invention includes a plurality of touch keys, a plurality of controllers and a processing circuit. The plurality of controllers group a plurality of selected touch keys among the plurality of touch keys into at least one touch key group. The at least one touch key group each includes at least two selected touch keys. The processing circuit is coupled to the plurality of touch keys. The processing circuit receives a plurality of first touch sensing signal groups from the at least one touch key group, and determines the touch of the at least one touch key group according to the plurality of first touch sensing signal groups. When a plurality of selected touch keys of a first touch key group in the at least one touch key group are touched at the same time, the processing circuit sequentially provides a plurality of touch driving signals to the first touch key group, and receives a plurality of second touch sensing signal groups corresponding to the plurality of touch driving signals. The frequencies of the plurality of touch driving signals are different from each other. When the plurality of second touch sensing signal groups all indicate that the plurality of selected touch keys of the first touch key group are touched at the same time, the processing circuit determines that the touch of the first touch key group is a valid touch.

[0007] The operation method of the present invention is used for a touch device. The touch device includes a plurality of touch keys and a plurality of controllers. The operation method includes: the plurality of controllers group a plurality of selected touch keys among the plurality of touch keys into at least one touch key group, wherein each of the at least one touch key group includes at least two selected touch keys; receiving a plurality of first touch sensing signal groups from the at least one touch key group, and judging the touch of the at least one touch key group according to the plurality of first touch sensing signal groups; when a plurality of selected touch keys of a first touch key group in the at least one touch key group are touched at the same time, providing a plurality of touch drive signals to the first touch key group in sequence, and receiving a plurality of second touch sensing signal groups corresponding to the plurality of touch drive signals, wherein the frequencies of the plurality of touch drive signals are different from each other; and when the plurality of second touch sensing signal groups all indicate that the plurality of selected touch keys of the first touch key group are touched at the same time, judging the touch of the first touch key group as a valid touch.

[0008] Based on the above, when multiple selected touch keys of the first touch key group are touched at the same time, the multiple touch drive signals with different frequencies are sequentially provided to the first touch key group, and multiple second touch sensing signal groups corresponding to the multiple touch drive signals are received. When the multiple second touch sensing signal groups all indicate that the multiple selected touch keys of the first touch key group are touched at the same time, the touch of the first touch key group is determined to be a valid touch. In this way, the touch device and the operation method can have an anti-interference function, so that the touch device can correctly determine whether a multi-finger touch operation occurs.

[0009] In order to make the above features and advantages of the present invention more clearly understood, embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a schematic diagram of a touch device according to an embodiment of the present invention.

[0011] Figure 2 is a flow chart of an operating method according to an embodiment of the present invention.

[0012] Figure 3 It is a timing diagram of the touch driving signal illustrated according to step S140.

[0013] Description of Reference Numerals

[0014] 100: Touch device

[0015] 110_1 to 110_5: Controller

[0016] 120: Processing circuit

[0017] F1~F5: Frequency

[0018] S100: How to operate

[0019] S110~S170: Steps

[0020] TD1~TDn: Touch drive signal

[0021] TDS: Touch Drive Signal Serial

[0022] TP1~TP5: time length

[0023] TK01~TK15: Touch keys

[0024] TKG1, TKG2: Touch key group

[0025] TS1_1, TS1_2: first touch sensing signal group

[0026] TS2_1~TS2_5, TS2_n: second touch sensing signal group

[0027] VT: Threshold DETAILED DESCRIPTION

[0028] Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The referenced element symbols in the following description will be regarded as the same or similar elements when the same element symbols appear in different drawings. These embodiments are only part of the present invention and do not disclose all possible implementation methods of the present invention. More specifically, these embodiments are only examples within the scope of the patent application of the present invention.

[0029] Please also refer to Figure 1 as well as Figure 2 , Figure 1is a schematic diagram of a touch device according to an embodiment of the present invention. Figure 2 It is a flow chart of an operation method according to an embodiment of the present invention. In the present embodiment, the touch device 100 is, for example, a device, a household appliance or an electronic device with a touch function (the present invention is not limited thereto). The operation method S100 is applicable to operating the touch device 100. In the present embodiment, the touch device 100 includes touch keys TK01 to TK15, controllers 110_1 to 110_5 and a processing circuit 120. The touch keys TK01 to TK15 can be any form of capacitive touch keys (the present invention is not limited thereto). The touch keys TK01 to TK15 can be, for example, mutual capacitance touch keys or self capacitance touch keys. The controllers 110_1 to 110_5 can be, for example, channel selection circuits. The processing circuit 120 is coupled to the controllers 110_1 to 110_5. The processing circuit 120 can be, for example, a central processing unit (CPU), or other programmable general-purpose or special-purpose microprocessor (Microprocessor), digital signal processor (Digital Signal Processor, DSP), programmable controller, application specific integrated circuits (Application Specific Integrated Circuits, ASIC), programmable logic device (Programmable Logic Device, PLD) or other similar devices or a combination of these devices, which can load and execute computer programs.

[0030] In this embodiment, the operation method S100 includes steps S110 to S170. In step S110, the controllers 110_1 to 110_5 group a plurality of selected touch keys among the touch keys TK01 to TK15 into touch key groups TKG1 and TKG2. The touch key groups TKG1 and TKG2 each include at least two selected touch keys.

[0031] For example, the controller 110_1 is coupled to the touch keys TK01-TK03 (or the first touch keys TK01-TK03). The controller 110_2 is coupled to the touch keys TK04-TK06 (or the second touch keys TK04-TK06). The controller 110_3 is coupled to the touch keys TK07-TK09 (or the third touch keys TK07-TK09). The controller 110_4 is coupled to the touch keys TK10-TK12 (or the fourth touch keys TK10-TK12). The controller 110_5 is coupled to the touch keys TK13-TK15 (or the fifth touch keys TK13-TK15). The controller 110_1 selects one of the touch keys TK01-TK03 as the first selected touch key. Controller 110_2 selects one of touch keys TK04 to TK06 as the second selected touch key. Controller 110_1, for example, selects touch key TK01 as the first selected touch key. Controller 110_2, for example, selects touch key TK04 as the second selected touch key. Touch keys TK01 and TK04 are grouped into touch key group TKG1. Controller 110_3 selects one of touch keys TK07 to TK09 as the third selected touch key. Controller 110_4 selects one of touch keys TK10 to TK12 as the fourth selected touch key. Controller 110_5 selects one of touch keys TK13 to TK15 as the fifth selected touch key. Controller 110_3, for example, selects touch key TK07 as the third selected touch key. Controller 110_4, for example, selects touch key TK10 as the fourth selected touch key. The controller 110_5 selects the touch key TK13 as the fifth selected touch key. The touch keys TK07, TK10, and TK13 are grouped into a touch key group TKG2.

[0032] In step S120, the processing circuit 120 receives the first touch sensing signal group TS1_1 from the touch key group TKG1 and the first touch sensing signal group TS1_2 from the touch key group TKG2. In this embodiment, the plurality of first touch sensing signal groups TS1_1 are touch sensing signals from at least two selected touch keys of the touch key group TKG1. The plurality of first touch sensing signal groups TS1_2 are touch sensing signals from at least two selected touch keys of the touch key group TKG2.

[0033] In step S130, the processing circuit 120 determines the touch of the touch key groups TKG1 and TKG2 according to the first touch sensing signal groups TS1_1 and TS1_2. In this embodiment, the touch key group TKG1 is taken as the "first touch key group" as an example. When the touch keys TK01 and TK04 of the touch key group TKG1 (i.e., the selected touch keys of the touch key group TKG1) are touched at the same time, this indicates that the multiple selected touch keys of the touch key group TKG1 may be touched by multiple fingers. Therefore, in step S140, the processing circuit 120 sequentially provides touch driving signals TD1~TDn to the touch key group TKG1, and receives the second touch sensing signal groups TS2_1~TS2_n corresponding to the driving signals TD1~TDn. In this embodiment, the second touch sensing signal group TS2_1 corresponds to the driving signal TD1. The second touch sensing signal group TS2_2 corresponds to the driving signal TD2. Similarly, the second touch sensing signal group TS2_n corresponds to the driving signal TDn. In the present embodiment, the frequencies of the driving signals TD1 to TDn are different from each other. Therefore, the touch keys TK01 and TK04 of the touch key group TKG1 respond to the driving signal TD1 having the first frequency to provide a plurality of touch sensing signals of the second touch sensing signal group TS2_1. The touch keys TK01 and TK04 of the touch key group TKG1 respond to the driving signal TD1 having the second frequency to provide a plurality of touch sensing signals of the second touch sensing signal group TS2_2, and so on.

[0034] On the other hand, in step S130 , when the touch keys TK01 and TK04 of the touch key group TKG1 are not touched at the same time, the processing circuit 120 returns to the operation of step S120 .

[0035] In step S150, the processing circuit 120 determines the second touch sensing signal group TS2_1~TS2_n. When the second touch sensing signal groups TS2_1~TS2_n all indicate that the touch keys TK01 and TK04 of the touch key group TKG1 are touched at the same time, this means that the touch keys TK01 and TK04 are determined to be "touched at the same time" at different frequencies. Therefore, the processing circuit 120 determines that the touch of the touch key group TKG1 is a valid touch (i.e., a valid multi-finger touch) in step S160. In addition, when the second touch sensing signal groups TS2_1~TS2_n all indicate that the touch keys TK01 and TK04 of the touch key group TKG1 are touched at the same time, the processing circuit 120 performs an operation corresponding to the valid touch of the touch key group TKG1.

[0036] On the other hand, when at least one of the second touch sensing signal groups TS2_1 to TS2_n indicates that the touch keys TK01 and TK04 of the touch key group TKG1 are not operated at the same time, this means that the touch keys TK01 and TK04 are interfered by a specific frequency, resulting in an erroneous judgment of "being touched at the same time". Therefore, the processing circuit 120 determines that the touch of the touch key group TKG1 is an invalid touch (i.e., an invalid multi-finger touch) in step S170. For example, when the second touch sensing signal group TS2_1 indicates that the touch keys TK01 and TK04 of the touch key group TKG1 are operated at the same time, and the second touch sensing signal group TS2_2 indicates that the touch keys TK01 and TK04 of the touch key group TKG1 are not operated at the same time, the processing circuit 120 determines that the touch keys TK01 and TK04 are interfered by noise. The frequency of the noise is similar to the first frequency of the driving signal TD1. Therefore, the processing circuit 120 can analyze the interference source.

[0037] In this embodiment, after step S160 or step S170, the processing circuit 120 returns to the operation of step S120. In some embodiments, after step S160 or step S170, the controllers 110_1 to 110_5 may regroup the selected touch keys TK01 to TK15 into touch key groups TKG1 and TKG2 in step S110.

[0038] It should be noted that when multiple selected touch keys of the touch key group TKG1 are touched at the same time, the processing circuit 120 sequentially provides driving signals TD1-TDn with different frequencies to the touch key group TKG1, and receives the second touch sensing signal groups TS2_1-TS2_n corresponding to the driving signals TD1-TDn. When the second touch sensing signal groups TS2_1-TS2_n all indicate that the touch keys TK01 and TK04 of the touch key group TKG1 are touched at the same time, the processing circuit 120 determines that the touch of the touch key group TKG1 is a valid touch. In this way, the touch device 100 and the operation method S100 can have an anti-interference function, so that the touch device can correctly determine whether a multi-finger touch operation occurs.

[0039] It should also be noted that the controllers 110_1 to 110_5 each select a single touch key as a selected touch key, so that interference between the selected touch keys can be isolated.

[0040] In this embodiment, the processing circuit 120 receives the first touch sensing signal group TS1_1 from the touch key group TKG1 and the first touch sensing signal group TS1_2 from the touch key group TKG2 through the controllers 110_1 to 110_5 in step S120. The processing circuit 120 provides the touch driving signals TD1 to TDn to the touch key group TKG1 through the controllers 110_1 to 110_5 in step S140, and receives the second touch sensing signal group TS2_1 to TS2_n from the touch key group TKG1 through the controllers 110_1 to 110_5.

[0041] In some embodiments, the processing circuit 120 directly receives the first touch sensing signal group TS1_1 from the touch key group TKG1 and the first touch sensing signal group TS1_2 from the touch key group TKG2 in step S120. The processing circuit 120 directly provides the touch driving signals TD1-TDn to the touch key group TKG1 in step S140, and directly receives the second touch sensing signal group TS2_1-TS2_n from the touch key group TKG1.

[0042] The touch determination and operation of the touch key group TKG2 by the processing circuit 120 can be easily deduced from steps S130 to S170 .

[0043] This embodiment is illustrated by five controllers 110_1 to 110_5, two touch key groups TKG1 and TKG2, and fifteen touch keys TK01 to TK15. However, the present invention is not limited to this embodiment, and the number of controllers of the present invention can be multiple. The number of touch keys of the present invention is greater than or equal to the number of controllers. The number of touch key groups of the present invention can be one or more.

[0044] In some embodiments, the processing circuit 120 performs channel selection settings on the controllers 110_1 - 110_5 , thereby controlling the controllers 110_1 - 110_5 to select a plurality of selected touch keys, and controlling the controllers 110_1 - 110_5 to jointly group the plurality of selected touch keys into at least one touch key group.

[0045] The following will illustrate the implementation details of steps S130 to S170 by way of example.

[0046] In the present embodiment, the first touch sensing signal group TS1_1 from the touch keys TK01 and TK04 of the touch key group TKG1 (i.e., the selected touch keys of the touch key group TKG1) has a plurality of touch strengths. The plurality of touch strengths correspond to the touch keys TK01 and TK04 of the touch key group TKG1, respectively. In step S130, the processing circuit 120 determines the plurality of touch strengths of the first touch sensing signal group TS1_1. When the plurality of touch strengths are all greater than the threshold value VT, the processing circuit 120 sequentially provides the touch driving signals TD1 to TDn to the touch key group TKG1 in step S140. On the other hand, when at least one of the plurality of touch strengths is less than or equal to the threshold value VT, the processing circuit 120 stops providing the touch driving signals TD1 to TDn to the touch key group TKG1.

[0047] Please also refer to Figure 1 , Figure 2 as well as Figure 3 , Figure 3 is a timing diagram of a touch driving signal according to an embodiment of the present invention. In this embodiment, Figure 3 is a timing diagram of the touch driving signal according to step S140. In this embodiment, the processing circuit 120 sequentially provides the touch driving signals TD1-TD5 to the touch key group TKG1. Therefore, the touch driving signals TD1-TD5 form a touch driving signal series TDS. The processing circuit 120 preferentially provides the touch driving signal TD1, then provides the touch driving signal TD2, and so on.

[0048] In the present embodiment, the touch driving signal TD1 has a frequency F1. The touch driving signal TD2 has a frequency F2. The touch driving signal TD3 has a frequency F3. The touch driving signal TD4 has a frequency F4. The touch driving signal TD5 has a frequency F5. The frequencies F1 to F5 are different from each other. For example, the frequency F1 is 125kHz. The frequency F2 is 250kHz. The frequency F3 is 500kHz. The frequency F4 is 1MHz. The frequency F5 is 2MHz. The present invention is not limited to the number, sequence and frequency of the touch driving signals.

[0049] In addition, the touch driving signal TD1 has a time length TP1. The touch driving signal TD2 has a time length TP2. The touch driving signal TD3 has a time length TP3. The touch driving signal TD4 has a time length TP4. The touch driving signal TD5 has a time length TP5. In this embodiment, the time lengths TP1 to TP5 may be the same or different. The time lengths TP1 to TP5 may be set according to actual usage requirements. The setting of the time lengths TP1 to TP5 is related to the supply times of the pulses of the touch driving signals TD1 to TD5.

[0050] In step S140, the processing circuit 120 may provide a touch drive signal serial TDS to the touch key group TKG1 once or multiple times. Therefore, the processing circuit 120 will receive the second touch sensing signal group TS2_1~TS2_5 (i.e., n is equal to 5). The second touch sensing signal group TS2_1 includes a plurality of touch intensities generated by the selected touch key of the touch key group TKG1 in response to the touch drive signal TD1. The second touch sensing signal group TS2_2 includes a plurality of touch intensities generated by the selected touch key of the touch key group TKG1 in response to the touch drive signal TD2, and so on. For example, when the touch intensities from the touch key TK01 are all greater than the threshold value VT, it indicates that the touch key TK01 may be subjected to touch behavior. When the touch intensities from the touch key TK01 are all less than or equal to the threshold value VT, it indicates that the touch key TK01 has not been subjected to touch behavior.

[0051] In step S150 , when all the touch intensities of the second touch sensing signal groups TS2_1 ˜ TS2_5 are greater than the threshold VT, the processing circuit 120 determines in step S160 that the touch of the touch key group TKG1 is a valid touch.

[0052] On the other hand, when at least one touch strength of the second touch sensing signal groups TS2_1 - TS2_5 is less than or equal to the threshold, the processing circuit 120 determines in step S170 that the touch of the touch key group TKG1 is an invalid touch.

[0053] In addition, when at least one touch strength of the second touch sensing signal groups TS2_1 to TS2_5 is less than or equal to the threshold, the processing circuit 120 uses the second touch sensing signal groups TS2_1 to TS2_5 to analyze the interference source of the environment where the touch device 100 is located in step S170, and determines the frequency of the interference source. For example, when the touch strength of the second touch sensing signal group TS2_1 is greater than the threshold VT and at least one touch strength of each of the second touch sensing signal groups TS2_2 to TS2_5 is less than or equal to the threshold, the processing circuit 120 determines that the touch key group TKG1 is interfered by the noise with the frequency F1, and then learns that the interference source is the noise with the frequency F1. For another example, when the touch strengths of the second touch sensing signal groups TS2_1 and TS2_2 are both greater than the threshold VT and at least one touch strength of each of the second touch sensing signal groups TS2_3 to TS2_5 is less than or equal to the threshold, the processing circuit 120 determines that the touch key group TKG1 is interfered by multiple noises with frequencies F1 and F2, and then learns that the interference sources are the noise with frequency F1 and the noise with frequency F2.

[0054] In summary, when multiple selected touch keys of the touch key group are touched at the same time, the processing circuit provides multiple driving signals with different frequencies to the touch key group in sequence, and receives multiple second touch sensing signal groups corresponding to the multiple driving signals. When the multiple second touch sensing signal groups all indicate that the selected touch keys of the touch key group are touched at the same time, the processing circuit determines that the touch of the touch key group is a valid touch. In this way, the present invention enables the touch device to have an anti-interference function, so that the touch device can correctly determine whether a multi-finger touch operation occurs. Multiple controllers of the touch device respectively select a single touch key as the selected touch key. In this way, the interference between the selected touch keys can be isolated. In addition, the processing circuit can also analyze the interference source based on the multiple second touch sensing signal groups.

[0055] Although the present invention has been disclosed as above by way of embodiments, it is not intended to limit the present invention. Any person having ordinary knowledge in the technical field may make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the definition of the claims.

Claims

1. A touch device, characterized in that: The touch control device comprises: Multiple touch keys; a plurality of controllers configured to group a plurality of selected touch keys among the plurality of touch keys into at least one touch key group, wherein each of the at least one touch key group includes at least two selected touch keys; and A processing circuit, coupled to the plurality of controllers, is configured to: receiving a plurality of first touch sensing signal groups from the at least one touch key group, and determining the touch of the at least one touch key group according to the plurality of first touch sensing signal groups, When a plurality of selected touch keys of a first touch key group in the at least one touch key group are touched simultaneously, a plurality of touch driving signals are sequentially provided to the first touch key group, and a plurality of second touch sensing signal groups corresponding to the plurality of touch driving signals are received, wherein the frequencies of the plurality of touch driving signals are different from each other, and When the plurality of second touch sensing signal groups all indicate that the plurality of selected touch keys of the first touch key group are touched at the same time, the touches of the first touch key group are determined to be valid touches.

2. The touch control device according to claim 1, characterized in that: When at least one of the plurality of second touch sensing signal groups indicates that the plurality of selected touch keys of the first touch key group are not operated simultaneously, the processing circuit determines that the touch of the first touch key group is an invalid touch.

3. The touch control device according to claim 1, characterized in that: When the plurality of second touch sensing signal groups all indicate that a plurality of first touch keys among the plurality of touch keys are operated simultaneously, the processing circuit performs an operation corresponding to a valid touch of the first touch key group.

4. The touch control device according to claim 1, wherein: The plurality of controllers include a first controller and a second controller, The first controller is coupled to a plurality of first touch keys among the plurality of touch keys, The first controller selects one of the plurality of first touch keys as a first selected touch key, The second controller is coupled to a plurality of second touch keys among the plurality of touch keys, The second controller selects one of the plurality of second touch keys as a second selected touch key, and The first selected touch key and the second selected touch key are grouped into the first touch key group.

5. The touch control device according to claim 4, characterized in that: The plurality of controllers further include a third controller and a fourth controller, The third controller is coupled to a plurality of third touch keys among the plurality of touch keys, The third controller selects one of the plurality of third touch keys as a third selected touch key, The fourth controller is coupled to a plurality of fourth touch keys among the plurality of touch keys, The fourth controller selects one of the plurality of fourth touch keys as a fourth selected touch key, and The third selected touch key and the fourth selected touch key are grouped into a second touch key group.

6. The touch control device according to claim 1, wherein: The first touch sensing signal group of the plurality of selected touch keys from the first touch key group has a plurality of touch intensities, The plurality of touch intensities correspond to the plurality of selected touch keys of the first touch key group, and When the plurality of touch intensities are all greater than a threshold, the processing circuit sequentially provides the plurality of touch driving signals to the first touch key group.

7. The touch control device according to claim 6, characterized in that: When at least one of the plurality of touch intensities is less than or equal to the threshold, the processing circuit stops providing the plurality of touch driving signals to the first touch key group.

8. The touch control device according to claim 1, wherein: The plurality of touch driving signals include a first touch driving signal having a first frequency and a second touch driving signal having a second frequency, The plurality of second touch sensing signal groups include a plurality of first touch intensities generated by the plurality of selected touch keys of the first touch key group in response to the first touch driving signal and a plurality of second touch intensities generated by the plurality of selected touch keys of the first touch key group in response to the first touch driving signal, When the plurality of first touch intensities and the plurality of second touch intensities are all greater than a threshold, the processing circuit determines that the touch of the first touch key group is a valid touch.

9. The touch control device according to claim 8, characterized in that: When at least one touch strength of the plurality of first touch strengths and the plurality of second touch strengths is less than or equal to the threshold, the processing circuit determines that the touch of the first touch key group is an invalid touch.

10. The touch control device according to claim 8, characterized in that: When the multiple first touch strengths are all greater than the threshold and at least one touch strength of the multiple second touch strengths is less than or equal to the threshold, the processing circuit determines that the touch of the first touch key group is an invalid touch, and determines that the first touch key group is interfered with by noise corresponding to a first frequency.

11. A method for operating a touch device, characterized in that: The touch control device includes a plurality of touch keys and a plurality of controllers, wherein the operation method includes: Grouping, by a plurality of controllers, a plurality of selected touch keys among the plurality of touch keys into at least one touch key group, wherein each of the at least one touch key group includes at least two selected touch keys; receiving a plurality of first touch sensing signal groups from the at least one touch key group, and determining the touch of the at least one touch key group according to the plurality of first touch sensing signal groups; When a plurality of selected touch keys of a first touch key group in the at least one touch key group are touched simultaneously, sequentially providing a plurality of touch driving signals to the first touch key group, and receiving a plurality of second touch sensing signal groups corresponding to the plurality of touch driving signals, wherein the frequencies of the plurality of touch driving signals are different from each other; and When the plurality of second touch sensing signal groups all indicate that the plurality of selected touch keys of the first touch key group are touched at the same time, the touches of the first touch key group are determined to be valid touches.

12. The operating method according to claim 11, characterized in that: Also includes: When at least one of the plurality of second touch sensing signal groups indicates that the plurality of selected touch keys of the first touch key group are not operated simultaneously, the touch of the first touch key group is determined to be an invalid touch.

13. The operating method according to claim 11, characterized in that: Also includes: When the plurality of second touch sensing signal groups all indicate that a plurality of first touch keys among the plurality of touch keys are operated simultaneously, an operation corresponding to a valid touch of the first touch key group is performed.

14. The operating method according to claim 11, characterized in that: The plurality of controllers include a first controller and a second controller, wherein the first controller is coupled to a plurality of first touch keys among the plurality of touch keys, wherein the second controller is coupled to a plurality of second touch keys among the plurality of touch keys, wherein the step of grouping the plurality of selected touch keys among the plurality of touch keys into the at least one touch key group by the plurality of controllers includes: selecting, by the first controller, one of the plurality of first touch keys as a first selected touch key; selecting, by the second controller, one of the plurality of second touch keys as a second selected touch key; and The first selected touch key and the second selected touch key are grouped into the first touch key group.

15. The operating method according to claim 14, characterized in that: The plurality of controllers further include a third controller and a fourth controller, wherein the third controller is coupled to a plurality of third touch keys among the plurality of touch keys, wherein the fourth controller is coupled to a plurality of fourth touch keys among the plurality of touch keys, wherein the step of grouping the plurality of selected touch keys among the plurality of touch keys into the at least one touch key group by the plurality of controllers further includes: selecting, by the third controller, one of the plurality of third touch keys as a third selected touch key; selecting one of the plurality of fourth touch keys as a fourth selected touch key by the fourth controller; and The third selected touch key and the fourth selected touch key are grouped into a second touch key group.

16. The operating method according to claim 11, characterized in that: The first touch sensing signal group of the plurality of selected touch keys from the first touch key group has a plurality of touch intensities, wherein the plurality of touch intensities correspond to the plurality of selected touch keys of the first touch key group, wherein when the plurality of selected touch keys of the first touch key group in the at least one touch key group are touched at the same time, the step of sequentially providing the plurality of touch driving signals to the first touch key group comprises: When the plurality of touch intensities are all greater than a threshold, the plurality of touch driving signals are sequentially provided to the first touch key group.

17. The operating method according to claim 16, characterized in that: Also includes: When at least one of the plurality of touch intensities is less than or equal to the threshold, the plurality of touch driving signals are stopped from being provided to the first touch key group.

18. The operating method according to claim 11, characterized in that: The plurality of touch driving signals include a first touch driving signal having a first frequency and a second touch driving signal having a second frequency, wherein the plurality of second touch sensing signal groups include a plurality of first touch strengths generated by the plurality of selected touch keys of the first touch key group in response to the first touch driving signal and a plurality of second touch strengths generated in response to the second touch driving signal, wherein when the plurality of second touch sensing signal groups all indicate that the plurality of selected touch keys of the first touch key group are touched at the same time, the step of determining that the touch of the first touch key group is a valid touch includes: When the plurality of first touch strengths and the plurality of second touch strengths are all greater than a threshold, it is determined that the touch of the first touch key group is a valid touch.

19. The operating method according to claim 18, characterized in that: Also includes: When at least one touch strength of the plurality of first touch strengths and the plurality of second touch strengths is less than or equal to the threshold, the touch of the first touch key group is determined to be an invalid touch.

20. The operating method according to claim 18, characterized in that: Also includes: When the multiple first touch strengths are all greater than the threshold and at least one touch strength of the multiple second touch strengths is less than or equal to the threshold, the touch of the first touch key group is judged to be an invalid touch, and it is determined that the first touch key group is interfered by noise corresponding to the first frequency.

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