Touch device and operation method thereof

Abstract

The invention provides a touch device and an operation method thereof. The touch device comprises a processor and a driving circuit. The processor performs active object detection through the driving circuit to detect a first position of the active pen on the touch panel. The processor performs passive object detection through the driving circuit to detect a second position of the passive object on the touch panel. The processor defines a first detection range including the first location. The processor defines a second detection range of the touch panel based on the first detection range, wherein the first detection range is mutually exclusive from the second detection range. Then, the processor performs active object detection in the first detection range through the driving circuit, and disables or ignores active object detection in the second detection range.

Description

Technical Field

[0001] The present invention relates to an electronic device, and in particular to a touch device and an operating method thereof. Background Art

[0002] Touch panels have been widely used in various electronic devices. Some touch panels can perform passive object detection and active object detection in a time-division multiplexed manner. In passive object detection, the touch device can detect a passive object, such as a finger or a passive stylus, through the touch panel. In active object detection, the touch device can detect an active object, such as an active stylus, through the touch panel. Compared with a passive stylus, the tip of an active stylus is smaller and has better accuracy. During the operation of active object detection, the active stylus transmits a downlink signal to the touch panel, and the touch device can determine the position of the active stylus on the touch panel after receiving the downlink signal through the touch panel.

[0003] A noisy environment may affect the active object detection performed by a touch device on a touch panel. For example, during the active object detection operation, the palm and the active pen may touch the touch panel at the same time, causing coordinate misjudgment (because the active pen position and the palm position are detected at the same time during the active object detection process). How to prevent the active pen position from being affected by the palm noise during active object detection is one of the many technical issues in this field. Summary of the invention

[0004] The invention provides a touch control device and an operation method thereof, so as to avoid the influence of noise on the detection of the position of an active pen during active object detection.

[0005] In an embodiment of the present invention, the above-mentioned touch device includes a processor and a driving circuit. The driving circuit is coupled to the processor. The processor performs active object detection on the touch panel through the driving circuit in a first period to detect the first position of the active pen on the touch panel. The processor performs passive object detection on the touch panel through the driving circuit in a second period different from the first period to detect the second position of the passive object on the touch panel. The processor defines a first detection range of the touch panel based on the first position of the active pen, wherein the first position is included in the first detection range. The processor defines a second detection range of the touch panel based on the first detection range, wherein the first detection range is mutually exclusive to the second detection range. In a third period different from the first period and the second period, the processor performs active object detection in the first detection range through the driving circuit, and the processor disables or ignores active object detection in the second detection range.

[0006] In an embodiment of the present invention, the above-mentioned operating method includes: performing active object detection during a first period to detect a first position of an active pen at a touch panel; performing passive object detection during a second period different from the first period to detect a second position of a passive object at the touch panel; defining a first detection range on the touch panel based on the first position, wherein the first position is included in the first detection range; defining a second detection range on the touch panel based on the first detection range, wherein the first detection range is mutually exclusive with the second detection range; and performing active object detection in the first detection range during a third period different from the first period and the second period, and disabling or ignoring active object detection in the second detection range.

[0007] Based on the above, during active object detection, the touch panel is at least divided into a mutually exclusive first detection range and a second detection range, wherein the first position of the active pen on the touch panel is included in the first detection range. The processor can perform active object detection in the first detection range through the driving circuit to obtain the position of the active pen on the touch panel. In addition, the processor can disable (or ignore) active object detection in the second detection range to avoid noise affecting the detection of the active pen position during active object detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of a circuit block of a touch device according to an embodiment of the present invention.

[0009] Figure 2 It is a flowchart of an operating method of a touch device according to an embodiment of the present invention.

[0010] Figure 3A and Figure 3B FIG. 1 is a schematic diagram of a driving circuit in different object detection scenarios according to an embodiment of the present invention.

[0011] Figure 4A and Figure 4B is a schematic diagram of the second detection range according to an embodiment of the present invention.

[0012] Figure 5A and Figure 5B FIG. 4 is a schematic diagram of the second detection range according to another embodiment of the present invention.

[0013] Description of Reference Numerals

[0014] 10: Touch panel

[0015] 20: Active pen

[0016] 30: Animal items

[0017] 100: Touch device

[0018] 110: Processor

[0019] 120: Driving circuit

[0020] 121: Driving signal generation circuit

[0021] 122: Analog front-end amplifier circuit

[0022] 123: Multi-tasking circuit

[0023] AFE01, AFE02, AFE03, AFE04, AFE05, AFE06, AFE07, AFE08, AFE09, AFE10: Analog front-end amplifiers

[0024] DNL: Downlink signal

[0025] S210, S220, S230: Steps

[0026] SP, SP1, SP2, SP3, SP4, SP5, SP6, SP7, SP8, SP9, SP10: Sensor pad DETAILED DESCRIPTION

[0027] Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Whenever possible, the same reference numerals are used in the drawings and the description to refer to the same or like parts.

[0028] The term "coupled (or connected)" used in the entire specification of this application (including the claims) may refer to any direct or indirect means of connection. For example, if the text describes a first device coupled (or connected) to a second device, it should be interpreted that the first device can be directly connected to the second device, or the first device can be indirectly connected to the second device through other devices or some connection means. The terms "first", "second", etc. mentioned in the entire specification of this application (including the claims) are used to name the components (element) or to distinguish different embodiments or scopes, and are not used to limit the upper or lower limit of the number of components, nor to limit the order of components. In addition, wherever possible, components / components / steps with the same number in the drawings and embodiments represent the same or similar parts. Components / components / steps using the same number or the same terminology in different embodiments can refer to the relevant descriptions of each other.

[0029] Figure 11 is a schematic diagram of a circuit block of a touch device 100 according to an embodiment of the present invention. The touch panel 10 is configured with a pad array (or electrode array) having a plurality of sensor pads SP. Based on the operation of the touch device 100, these sensor pads SP can sense touch events on the touch panel 10, such as passive object touch events and / or active object touch events. This embodiment does not limit the implementation of the touch panel 10. For example, based on actual applications, the touch panel 10 can be a general (well-known) touch panel or other touch panels.

[0030] The touch control device 100 can drive the touch panel 10 to perform passive object detection and active object detection in a time-division multiplexed manner. In passive object detection, the touch control device 100 can detect a passive object 30, such as a palm or a passive stylus, through the touch panel 10. During the operation of passive object detection, the touch control device 100 can provide a driving signal (such as a pulse signal) to the touch panel 10, and then read the sensing result of the touch panel 10 to determine the position of the passive object 30 on the touch panel 10. In active object detection, the touch control device 100 can detect an active object, such as an active stylus 20, through the touch panel 10. During the operation of active object detection, the active stylus 20 will transmit a downlink signal to the touch panel 10, and the touch control device 100 can determine the position of the active stylus 20 on the touch panel 10 after receiving the downlink signal through the touch panel 10.

[0031] During the active object detection operation, the active pen 20 and the passive object 30 may contact the touch panel 10 at the same time, thereby causing misjudgment of the coordinates of the active pen 20. The following embodiments will illustrate how the touch device 100 prevents the noise of the passive object 30 from affecting the active object detection.

[0032] Figure 1 The touch control device 100 shown includes a processor 110 and a driving circuit 120. According to different designs, in some embodiments, the processor 110 can be implemented as a hardware circuit. In other embodiments, the processor 110 can be implemented as firmware, software (i.e., program), or a combination of the two. In still other embodiments, the processor 110 can be implemented as a combination of hardware, firmware, and software.

[0033] In terms of hardware, the processor 110 may be implemented as a logic circuit on an integrated circuit. For example, the functions of the processor 110 may be implemented in various logic blocks, modules, and circuits in one or more controllers, microcontrollers, microprocessors, application-specific integrated circuits (ASICs), digital signal processors (DSPs), field programmable gate arrays (FPGAs), central processing units (CPUs), and / or other processing units. The functions of the processor 110 may be implemented as hardware circuits, such as various logic blocks, modules, and circuits in an integrated circuit, using hardware description languages ​​(such as Verilog HDL or VHDL) or other suitable programming languages.

[0034] In terms of software and / or firmware form, the relevant functions of the above-mentioned processor 110 can be implemented as programming codes. For example, the processor 110 is implemented using general programming languages ​​(programming languages, such as C, C++ or assembly language) or other suitable programming languages. The programming code can be recorded / stored in a "non-transitory machine-readable storage medium". In some embodiments, the non-transitory machine-readable storage medium includes, for example, a semiconductor memory and / or a storage device. An electronic device (such as a CPU, a controller, a microcontroller or a microprocessor) can read and execute the programming code from the non-transitory machine-readable storage medium to implement the relevant functions of the processor 110.

[0035] Figure 2 FIG. 1 is a flow chart of an operation method of a touch device according to an embodiment of the present invention. Figure 1 and Figure 2, the driving circuit 120 is coupled to the processor 110. In step S210, the processor 110 may perform active object detection on the touch panel 10 during the first period through the driving circuit 120 to detect the position (first position) of the active pen 20 on the touch panel 10. After step S210 (for example, before step S220, or before step S230), the processor 110 may define a first detection range on the touch panel 10 based on the position of the active pen 20 (the position of the active pen 20 is included in the first detection range), and define a second detection range on the touch panel 10 based on the first detection range. The first detection range is mutually exclusive to the second detection range.

[0036] Figure 3A and Figure 3B FIG. 1 is a schematic diagram of different object detection scenarios of the driving circuit 120 according to an embodiment of the present invention. Figure 3A and Figure 3B The driving circuit 120 shown can be used as Figure 1 The driving circuit 120 is one of many implementation examples. Figure 3A and Figure 3B In the illustrated embodiment, the driving circuit 120 includes a driving signal generating circuit 121, an analog front-end (AFE) amplifier circuit 122, and a multiplexer circuit 123. The driving signal generating circuit 121, the analog front-end amplifier circuit 122, and the multiplexer circuit 123 are controlled by the processor 110. A first selection terminal of the multiplexer circuit 123 is coupled to an output terminal of the driving signal generating circuit 121. A second selection terminal of the multiplexer circuit 123 is coupled to an input terminal of the analog front-end amplifier circuit 122. A common terminal of the multiplexer circuit 123 is coupled to the sensor pad SP of the touch panel 10.

[0037] Figure 3A 1 shows a schematic diagram of a scenario of the driving circuit 120 in active object detection. In active object detection, the multitasking circuit 123 selectively couples the sensor pad SP of the touch panel 10 to the input end of the analog front-end amplifier circuit 122. During the operation of active object detection, the active pen 20 transmits a downlink signal DNL to the touch panel 10, and the analog front-end amplifier circuit 122 can receive the downlink signal DNL through the multitasking circuit 123 and the sensor pad SP. The analog front-end amplifier circuit 122 can provide the amplified signal corresponding to the downlink signal DNL to the processor 110. After the processor 110 receives the downlink signal, the processor 110 can determine the position of the active pen 20 on the touch panel 10.

[0038] Please refer to Figure 1 and Figure 2In step S220, the processor 110 may perform passive object detection on the touch panel 10 during the second period through the driving circuit 120 to detect the position (second position) of the passive object 30 on the touch panel 10. For example, the driving circuit 120 may perform passive object detection on the entire sensing area of ​​the touch panel 10.

[0039] Figure 3B 1 shows a schematic diagram of a scenario of the driving circuit 120 in passive object detection. In the first phase of the passive object detection, the multi-task circuit 123 selectively transmits the driving signal (e.g., a pulse signal) output by the driving signal generating circuit 121 to the sensor pad SP of the touch panel 10. In the second phase of the passive object detection, the multi-task circuit 123 selectively couples the sensor pad SP of the touch panel 10 to the input end of the analog front-end amplifier circuit 122. Therefore, during the operation of the passive object detection, the driving circuit 120 can provide a driving signal to the sensor pad SP, and then read the sensing result of the sensor pad SP. The analog front-end amplifier circuit 122 can provide the amplified signal corresponding to the sensing result to the processor 110. After the processor 110 receives the sensing results of different sensor pads SP, the processor 110 can determine the position of the passive object 30 on the touch panel 10.

[0040] Please refer to Figure 1 and Figure 2 . In step S230, during the third period, the processor 110 may perform active object detection in the first detection range through the driving circuit 120, and the processor 110 may disable (or ignore) active object detection in the second detection range. Wherein, the first detection range is defined based on the position (first position) of the active pen 20, and the position of the active pen 20 is included in the first detection range. The size and geometry of the first detection range may be determined according to different applications. The second detection range is defined based on the first detection range, wherein the first detection range is mutually exclusive with the second detection range. The definition of the second detection range may vary according to different applications. Different embodiments of the second detection range will be described below.

[0041] Figure 4A and Figure 4B is a schematic diagram of the second detection range according to an embodiment of the present invention. Figure 4A and Figure 4B The touch panel 10, active pen 20, passive object 30 and processor 110 shown in FIG. Figure 1 , Figure 3A and Figure 3B The touch panel 10, the active pen 20, the passive object 30 and the processor 110 are shown in FIG. Figure 4A and Figure 4BThe analog front-end amplifier circuit 122 shown can refer to Figure 3A and Figure 3B The analog front-end amplifier circuit 122 is shown in FIG. Figure 4A and Figure 4B In the illustrated embodiment, the touch panel 10 includes sensor pads SP1, SP2, SP3, SP4, SP5, SP6, SP7, SP8, SP9 and SP10, and the analog front-end amplifier circuit 122 includes analog front-end amplifiers AFE01, AFE02, AFE03, AFE04, AFE05, AFE06, AFE07, AFE08, AFE09 and AFE10. Figure 4A and Figure 4B The sensor pads SP1 to SP10 shown can refer to Figure 1 , Figure 3A and Figure 3B Relevant description of the sensor pad SP shown.

[0042] exist Figure 4A and Figure 4B In the illustrated embodiment, the processor 110 may perform active object detection on the touch panel 10 during the first period through the analog front-end amplifier circuit 122 to detect the position (first position) of the active pen 20 on the touch panel 10. Then, the processor 110 may define a first detection range on the touch panel 10 based on the position of the active pen 20. Based on the position of the active pen 20, as an example, it is assumed that the processor 110 defines the sensor pads SP1, SP2, and SP3 as the first detection range. Figure 4A and Figure 4B In the illustrated embodiment, the processor 110 may define other ranges in the touch panel 10 except the first detection range as a "second detection range". As an example, it is assumed that other sensor pads SP4 to SP10 of the touch panel 10 are defined as the second detection range. Therefore, the analog front-end amplifiers AFE01 to AFE03 correspond to the "first detection range", and the analog front-end amplifiers AFE04 to AFE10 correspond to the "second detection range".

[0043] exist Figure 4AIn the illustrated embodiment, the processor 110 may enable the analog front-end amplifiers AFE01 to AFE03 corresponding to the “first detection range” in the analog front-end amplifier circuit 122 to perform active object detection on the sensor pads SP1 to SP3 (the first detection range). The processor 110 may disable the analog front-end amplifiers AFE04 to AFE10 corresponding to the “second detection range” in the analog front-end amplifier circuit 122 to disable active object detection on the sensor pads SP4 to SP10 (the second detection range). In the subsequent passive object detection operation, the processor 110 may enable all analog front-end amplifiers AFE01 to AFE10 to perform passive object detection on all sensing areas of the touch panel 10.

[0044] exist Figure 4B In the illustrated embodiment, the processor 110 may enable all analog front-end amplifiers AFE01 to AFE10 to perform active object detection on all sensing areas of the touch panel 10. The processor 110 may receive and process the outputs of the analog front-end amplifiers AFE01 to AFE03 corresponding to the "first detection range" in the analog front-end amplifiers AFE01 to AFE10 to perform active object detection on the sensor pads SP1 to SP3 (first detection range). The processor 110 may ignore the outputs of the analog front-end amplifiers AFE04 to AFE10 corresponding to the "second detection range" in the analog front-end amplifiers AFE01 to AFE10 to ignore the active object detection on the sensor pads SP4 to SP10 (second detection range). In the subsequent operation of the object detection, the processor 110 may receive and process the outputs of the analog front-end amplifiers AFE01 to AFE10 to perform passive object detection on all sensing areas of the touch panel 10.

[0045] Figure 5A and Figure 5B FIG. 4 is a schematic diagram of the second detection range according to another embodiment of the present invention. Figure 5A and Figure 5B The touch panel 10, active pen 20, passive object 30 and processor 110 shown in FIG. Figure 1 , Figure 3A and Figure 3B The touch panel 10, the active pen 20, the passive object 30 and the processor 110 are shown in FIG. Figure 5A and Figure 5B The analog front-end amplifier circuit 122 shown can refer to Figure 3A and Figure 3B The analog front-end amplifier circuit 122 is shown in FIG. Figure 5A and Figure 5BIn the illustrated embodiment, the touch panel 10 includes sensor pads SP1, SP2, SP3, SP4, SP5, SP6, SP7, SP8, SP9 and SP10, and the analog front-end amplifier circuit 122 includes analog front-end amplifiers AFE01, AFE02, AFE03, AFE04, AFE05, AFE06, AFE07, AFE08, AFE09 and AFE10. Figure 5A and Figure 5B The sensor pads SP1 to SP10 shown can refer to Figure 1 , Figure 3A and Figure 3B Relevant description of the sensor pad SP shown.

[0046] exist Figure 5A and Figure 5B In the illustrated embodiment, the processor 110 may perform active object detection on the touch panel 10 during the first period through the analog front-end amplifier circuit 122 to detect the position (first position) of the active pen 20 on the touch panel 10. Then, the processor 110 may define a first detection range on the touch panel 10 based on the position of the active pen 20. The processor 110 may define a "second detection range" based on the first detection range of the active pen 20 and the second position of the passive object 30. The position (second position) of the passive object 30 is included in the second detection range, and the position of the active pen 20 is outside the second detection range. The processor 110 may perform active object detection on other ranges in the touch panel 10 except the "first detection range" and the "second detection range" during the third period.

[0047] Based on the position of the active pen 20 and the position of the passive object 30, as an example, it is assumed that the processor 110 Figure 5A and Figure 5B The sensor pads SP1 to SP3 are defined as the first detection range, and the Figure 5A and Figure 5B The sensor pads SP5 to SP8 are defined as the second detection range. Therefore, the analog front-end amplifiers AFE01 to AFE03 correspond to the "first detection range", the analog front-end amplifiers AFE05 to AFE08 correspond to the "second detection range", and the analog front-end amplifiers AFE04, AFE09 and AFE10 correspond to "other ranges except the first detection range and the second detection range".

[0048] exist Figure 5AIn the illustrated embodiment, the processor 110 may enable the analog front-end amplifiers AFE01 to AFE04, AFE09, and AFE10 corresponding to the “first detection range” and “other ranges” in the analog front-end amplifier circuit 122 to perform active object detection on the sensor pads SP1 to SP3 (first detection range) and the sensor pads SP4, SP9, and SP10 (other ranges). The processor 110 may disable the analog front-end amplifiers AFE05 to AFE08 corresponding to the “second detection range” in the analog front-end amplifier circuit 122 to disable active object detection on the sensor pads SP5 to SP8 (second detection range). In the subsequent passive object detection operation, the processor 110 may enable all analog front-end amplifiers AFE01 to AFE10 to perform passive object detection on all sensing areas of the touch panel 10.

[0049] exist Figure 5B In the illustrated embodiment, the processor 110 may enable all analog front-end amplifiers AFE01 to AFE10 to perform active object detection on all sensing areas of the touch panel 10. The processor 110 may receive and process the outputs of the analog front-end amplifiers AFE01 to AFE03 corresponding to the "first detection range" and the outputs of the analog front-end amplifiers AFE04, AFE09 and AFE10 corresponding to the "other ranges" to perform active object detection on the sensor pads SP1 to SP3 (first detection range) and the sensor pads SP4, SP9 and SP10 (other ranges). The processor 110 may ignore the outputs of the analog front-end amplifiers AFE05 to AFE08 corresponding to the "second detection range" to ignore active object detection on the sensor pads SP5 to SP8 (second detection range). In the subsequent operation of object detection, the processor 110 may receive and process the outputs of all analog front-end amplifiers AFE01 to AFE10 to perform passive object detection on all sensing areas of the touch panel 10.

[0050] In summary, during active object detection, the touch panel 10 is at least divided into a mutually exclusive first detection range and a second detection range, wherein the first position of the active pen 20 in the touch panel 10 is included in the first detection range. The processor 110 can perform active object detection in the first detection range through the driving circuit 120 to obtain the position of the active pen 20 in the touch panel 10. In addition, the processor 110 can disable (or ignore) active object detection in the second detection range to prevent noise from affecting the detection of the active pen position during active object detection.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A touch device, characterized in that: The touch control device comprises: Processor; and A driving circuit is coupled to the processor, wherein: The processor performs active object detection on the touch panel through the driving circuit during a first period to detect a first position of the active pen on the touch panel; The processor performs passive object detection on the touch panel through the driving circuit in a second period different from the first period to detect a second position of the passive object on the touch panel; The processor defines a first detection range on the touch panel based on the first position of the active pen, wherein the first position is included in the first detection range; The processor defines a second detection range on the touch panel based on the first detection range, wherein the first detection range is mutually exclusive with the second detection range; and During a third period different from the first period and the second period, the processor performs the active object detection in the first detection range through the driving circuit, and the processor disables or ignores the active object detection in the second detection range.

2. The touch control device according to claim 1, characterized in that: The driving circuit comprises: A driving signal generating circuit, controlled by the processor; an analog front-end amplifier circuit, controlled by the processor; and A multi-tasking circuit is controlled by the processor, wherein a first selection end of the multi-tasking circuit is coupled to an output end of the drive signal generating circuit, a second selection end of the multi-tasking circuit is coupled to an input end of the analog front-end amplifier circuit, and a common end of the multi-tasking circuit is coupled to a sensor pad of the touch panel.

3. The touch control device according to claim 2, characterized in that: In a first phase of the passive object detection, the multitasking circuit selectively transmits the drive signal output by the drive signal generating circuit to the sensor pad of the touch panel; In a second phase of the passive object detection, the multitasking circuit selectively couples the sensor pad of the touch panel to the input of the analog front-end amplifier circuit; as well as In the active object detection, the multiplexing circuit selectively couples the sensor pad of the touch panel to the input terminal of the analog front-end amplifier circuit.

4. The touch control device according to claim 1, wherein: The processor defines other ranges in the touch panel except the first detection range as the second detection range.

5. The touch control device according to claim 1, wherein: The processor defines the second detection range based on the first detection range of the active pen and the second position of the passive object, the second position is included in the second detection range, and the first position of the active pen is outside the second detection range.

6. The touch control device according to claim 5, characterized in that: During the third period, the processor performs the active object detection on other ranges of the touch panel except the first detection range and the second detection range.

7. The touch control device according to claim 1, characterized in that: The driving circuit includes a plurality of analog front-end amplifiers; The processor disables at least one analog front-end amplifier corresponding to the second detection range among the plurality of analog front-end amplifiers to disable the active object detection in the second detection range; as well as The processor enables at least one analog front-end amplifier corresponding to the first detection range among the plurality of analog front-end amplifiers to perform the active object detection in the first detection range.

8. The touch control device according to claim 1, wherein: The driving circuit includes a plurality of analog front-end amplifiers; The processor ignores the output of at least one analog front-end amplifier corresponding to the second detection range among the plurality of analog front-end amplifiers to ignore the active object detection in the second detection range; as well as The processor receives and processes an output of at least one analog front-end amplifier corresponding to the first detection range among the plurality of analog front-end amplifiers to perform the active object detection in the first detection range.

9. A method for operating a touch device, characterized in that: The operation method comprises: Performing active object detection during a first period to detect a first position of the active pen on the touch panel; Performing passive object detection during a second period different from the first period to detect a second position of the passive object on the touch panel; defining a first detection range on the touch panel based on the first position, wherein the first position is included in the first detection range; defining a second detection range on the touch panel based on the first detection range, wherein the first detection range is mutually exclusive with the second detection range; and During a third period different from the first period and the second period, the active object detection is performed in the first detection range, and the active object detection in the second detection range is disabled or ignored.

10. The operating method according to claim 9, characterized in that: The operation method further includes: The other ranges in the touch panel except the first detection range are defined as the second detection range.

11. The operating method according to claim 9, characterized in that: The operation method further includes: The second detection range is defined based on the first detection range of the active pen and the second position of the passive object, wherein the second position is included in the second detection range and the first position of the active pen is outside the second detection range.

12. The operating method according to claim 11, characterized in that: The operation method further includes: During the third period, the active object detection is performed on other ranges of the touch panel except the first detection range and the second detection range.

13. The operating method according to claim 9, characterized in that: The operation method further includes: disabling at least one analog front-end amplifier corresponding to the second detection range among a plurality of analog front-end amplifiers to disable the active object detection in the second detection range; and At least one analog front end amplifier corresponding to the first detection range among the plurality of analog front end amplifiers is enabled to perform the active object detection in the first detection range.

14. The operating method according to claim 9, characterized in that: The operation method further includes: Ignore the output of at least one analog front-end amplifier corresponding to the second detection range among a plurality of analog front-end amplifiers to ignore the active object detection in the second detection range; and The output of at least one analog front-end amplifier of the plurality of analog front-end amplifiers corresponding to the first detection range is processed to perform the active object detection in the first detection range.

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