Electronic device and detection method

Abstract

An electronic device and a detection method are provided. The electronic device includes a touch panel, a communication unit, and a processing unit. The communication unit is configured to send a detection signal. The communication unit is configured to receive a response signal according to the detection signal. The processing unit is coupled to the touch panel and the communication unit. The processing unit is configured to determine an operation mode of the electronic device according to the response signal. The operation mode includes a first mode and a second mode. Input signal sources of the electronic device in the first mode include a finger. Input signal sources in the second mode include the finger and a stylus. When the response signal includes a tip signal of the stylus and a ring signal of the stylus, the processing unit is configured to determine whether to set the operation mode to the second mode according to a value relationship between the tip signal and the ring signal.

Description

Technical Field

[0001] This invention relates to an electronic device, and more particularly to an electronic device and a detection method. Background Technology

[0002] Touch technology is widely used in current electronic devices to receive input signals. Generally, users can use their fingers to touch and operate electronic devices. Furthermore, users can use styluses to touch, thereby improving touch accuracy and adding more functions. Correspondingly, electronic devices can be set with a pure hand mode and a stylus hand mode to receive touch signals from fingers or styluses.

[0003] However, noise may exist in environments where electronic devices are used. Noise can cause electronic devices to misinterpret actions, leading them to enter incorrect modes and reducing touch accuracy. Summary of the Invention

[0004] This invention relates to an electronic device and a detection method that can effectively and accurately detect the approach and departure of a stylus.

[0005] The electronic device of the present invention includes a touch panel, a communication unit, and a processing unit. The communication unit is configured to emit a detection signal. The communication unit is configured to receive a response signal based on the detection signal. The processing unit is coupled to the touch panel and the communication unit. The processing unit is configured to determine the operating mode of the electronic device based on the response signal. The operating modes include a first mode and a second mode. In the first mode, the input signal source of the electronic device includes a finger. In the second mode, the input signal source includes a finger and a stylus. When the response signal includes a stylus tip signal and a stylus ring signal, the processing unit is configured to determine whether to set the operating mode to the second mode based on the numerical relationship between the stylus tip signal and the stylus ring signal.

[0006] The detection method of the present invention is suitable for determining the operating mode of an electronic device including a touch panel. The detection method includes: emitting a detection signal; receiving a response signal based on the detection signal; determining an operating mode based on the response signal, wherein the operating mode includes a first mode and a second mode, the input signal source of the electronic device in the first mode includes a finger, and the input signal source in the second mode includes a finger and a stylus; and when the response signal includes a stylus tip signal and a stylus ring signal, determining whether to set the operating mode to the second mode based on the numerical relationship between the stylus tip signal and the stylus ring signal.

[0007] Based on the above, the electronic device and detection method of the present invention determine the operating mode of the electronic device according to the detection signal and the response signal, thereby avoiding the electronic device from entering an incorrect operating mode and increasing the user experience.

[0008] To make the above features and advantages of the present invention more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of an electronic device according to an embodiment of the present invention.

[0010] Figure 2 This is a flowchart of a detection method according to an embodiment of the present invention.

[0011] Figure 3 This is a flowchart of a detection method according to an embodiment of the present invention.

[0012] Figure 4 This is a flowchart of a detection method according to an embodiment of the present invention.

[0013] Explanation of reference numerals in the attached figures

[0014] 110: Electronic devices

[0015] 111: Touch panel

[0016] 112: Communication Unit

[0017] 113: Processing Unit

[0018] 120: Stylus

[0019] 121: Pen tip

[0020] 122: Pen Ring

[0021] DET: Detection signal

[0022] RES: Response signal

[0023] S210, S220, S230, S240, S310, S320, S330, S340, S410, S420, S430, S440, S450: Steps Detailed Implementation

[0024] Reference will now be made in detail to exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same element references are used in the drawings and description to denote the same or similar parts.

[0025] Furthermore, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It will be further understood that terms such as those defined in commonly used dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant technology and this invention, and will not be interpreted as having idealized or overly formal meanings unless expressly defined herein.

[0026] The present invention can be understood by referring to the following detailed description in conjunction with the accompanying drawings. It should be noted that, for ease of understanding and for the sake of brevity in the drawings, many of the accompanying drawings depict only a portion of the electronic device, and specific elements in the drawings are not drawn to scale. Furthermore, the number and dimensions of the elements in the drawings are for illustrative purposes only and are not intended to limit the scope of the invention.

[0027] It should be understood that the technical features of several different embodiments can be replaced, reorganized, or combined to complete other embodiments without departing from the spirit of the present invention. Furthermore, in the following description and claims, the words "containing" and "comprising" are open-ended terms and should therefore be interpreted as "containing but not limited to...".

[0028] Figure 1 This is a schematic diagram of an electronic device according to an embodiment of the present invention. (Refer to...) Figure 1 The electronic device 110 includes a touch panel 111, a communication unit 112, and a processing unit 113. The stylus 120 may include a pen tip 121 and a pen ring 122. The communication unit 112 is configured to emit a detection signal DET. The communication unit 112 may be configured to receive a response signal RES based on the detection signal DET. The processing unit 113 is coupled to the touch panel 111 and the communication unit 112. The processing unit 113 is configured to determine the operating mode of the electronic device 110 based on the response signal RES. The operating modes include a first mode and a second mode. In the first mode, the input signal source for the electronic device 110 includes a finger. In the second mode, the input signal source for the electronic device 110 includes both a finger and the stylus 120. When the response signal RES may include the tip signal TIP of the stylus 120 tip 121 and the ring signal RING of the stylus 120 ring 122, the processing unit 113 is configured to determine whether to set the operation mode to the second mode based on the numerical relationship between the tip signal TIP and the ring signal RING. In this way, the processing unit 113 can determine the operation mode of the electronic device 110 based on the detection signal DET and the response signal RES, thereby preventing the electronic device 110 from entering an incorrect operation mode and improving the user experience.

[0029] In one embodiment, the electronic device 110 may include, for example, a mobile phone, a tablet computer, a notebook computer, a desktop computer, or other computing devices, and the present invention is not limited thereto.

[0030] In one embodiment, the first operating mode of the electronic device 110 can be a pure hand mode, and the second operating mode of the electronic device 110 can be a pen-hand mode. That is, in the first mode, the electronic device 110 only receives signals from the finger. And in the second mode, the electronic device 110 simultaneously receives signals from the finger and signals from the stylus 120.

[0031] In one embodiment, the detection signal DET may include an entry detection signal or a withdrawal detection signal. The entry detection signal is used to detect whether the stylus 120 is close to the electronic device 110. The withdrawal detection signal is used to detect whether the stylus 120 is far away from the electronic device 110. That is, when the operating mode of the electronic device 110 is the first mode (pure hand mode), the processing unit 113 may be configured to determine whether the stylus 120 is close to the electronic device based on the signal frequency or signal strength of the response signal RES received in response to the entry detection signal. When the operating mode of the electronic device 110 is the second mode (pen-hand mode), the processing unit 113 may be configured to determine whether the stylus 120 is far away from the electronic device based on the signal frequency or signal strength of the response signal RES received in response to the withdrawal detection signal. In one embodiment, the processing unit 113 can determine whether the response signal RES is a signal responding to the detection signal DET based on whether the response frequency of the response signal RES is the same as the detection frequency of the detection signal DET, and then determine whether the object approaching or moving away from the electronic device 110 is the detection stylus 120, so as to switch the operation mode of the electronic device 110. In another embodiment, the processing unit 113 can make the above determination based on whether the signal strength or signal content of the response signal RES and the detection signal DET are correlated, and the present invention is not limited thereto.

[0032] For example, when the operating mode of the electronic device 110 is the first mode (pure hand mode), the processing unit 113 can determine that the response signal RES is a signal responding to the detection signal DET (pen detection signal) based on the fact that the response frequency of the response signal RES is the same as the detection frequency of the detection signal DET (pen detection signal). Furthermore, the processing unit 113 can further determine that the object approaching the electronic device 110 is the stylus 120 based on the fact that the response signal RES received in response to the detection signal DET (pen detection signal) includes the pen ring signal RING of the stylus 120's pen ring 122, thereby switching the operating mode of the electronic device 110 from the first mode (pure hand mode) to the second mode (pen-hand mode).

[0033] Similarly, when the operating mode of the electronic device 110 is the second mode (pen-hand mode), the processing unit 113 can determine that the response signal RES is a signal responding to the detection signal DET (pen-removal detection signal) based on the fact that the response frequency of the response signal RES is the same as the detection frequency of the detection signal DET (pen-removal detection signal). Furthermore, the processing unit 113 can further determine that the object moving away from the electronic device 110 is the stylus 120 based on the fact that the response signal RES received in response to the detection signal DET (pen-removal detection signal) includes the pen ring signal RING of the stylus 120's pen ring 122, thereby switching the operating mode of the electronic device 110 from the second mode (pen-hand mode) to the first mode (pure hand mode).

[0034] In one embodiment, the communication unit 112 may include, for example, a wired network module, a wireless network module, a Bluetooth module, an infrared module, a radio frequency identification (RFID) module, a Zigbee network module, or a near field communication (NFC) network module, but the present invention is not limited thereto.

[0035] In one embodiment, the processing unit 113 may include, for example, a central processing unit (CPU), a microprocessor, a digital signal processor (DSP), a programmable controller, a programmable logic device (PLD), or other similar devices or combinations thereof, and the present invention is not limited thereto. Furthermore, in one embodiment, the functions of the processing unit 113 may be implemented as multiple program codes. These program codes are stored in a memory and executed by the processing unit 113. Alternatively, in one embodiment, the functions of the processing unit 113 may be implemented as one or more circuits. The present invention does not limit the implementation of the functions of the processing unit 113 in software or hardware.

[0036] Figure 2 This is a flowchart of a detection method according to an embodiment of the present invention. (Refer to...) Figure 1 and Figure 2 The detection method of this embodiment can be adapted to determine the operating mode of an electronic device 110 including a touch panel 111. The detection method may include steps S210, S220, S230 and S240.

[0037] In step S210, the communication unit 112 may send a detection signal DET to detect the stylus 120. In step S220, the communication unit 112 may receive a response signal RES based on the detection signal DET. In step S230, the processing unit 113 may determine the operating mode of the electronic device 110 based on the received response signal RES. In other words, the processing unit 113 may detect the approach or departure of the stylus 120 based on the response signal RES to switch the operating mode of the electronic device 110. In one embodiment, the operating mode may include a first mode and a second mode. In the first mode, the input signal source of the electronic device 110 includes a finger. In the second mode, the input signal source of the electronic device 110 includes both a finger and the stylus 120.

[0038] However, ambient noise can interfere with the detection capabilities of the electronic device 110, causing it to enter an incorrect operating mode and thus degrading the user experience. For example, ambient noise has a noise frequency. When the noise frequency is similar to the frequency of the response signal RES used by the electronic device 110 to detect the stylus 120, the electronic device 110 may misinterpret the approach or departure of an object coupled with the noise (e.g., a finger) as the approach or departure of the stylus 120. In this case, the electronic device 110 may enter an incorrect operating mode, leading to reduced touch accuracy and a less satisfactory user experience.

[0039] To address the aforementioned issues, in step S240, the response signal RES may include the pen tip signal TIP and the pen ring signal RING of the stylus 120. When a finger or a noisy object approaches the electronic device 110, the frequency and signal strength of the response signal RES received by the communication unit 112 are relatively simple. When the stylus 120 approaches the electronic device 110, the response signal RES received by the communication unit 112 includes the pen tip signal TIP and the pen ring signal RING. Furthermore, the signal frequencies and signal strengths of the pen tip signal TIP and the pen ring signal RING differ. The processing unit 113 can determine that the object approaching the electronic device 110 is the stylus 120 based on the numerical relationship between the pen tip signal TIP and the pen ring signal RING.

[0040] In other words, the processing unit 113 can determine whether to set the operation mode of the electronic device 110 to the second mode (pen-hand mode) based on the numerical relationship between the pen tip signal and the pen ring signal. Furthermore, when the response signal RES does not include the pen tip signal TIP and the pen ring signal RING, the processing unit 113 can set the operation mode of the electronic device 110 to the first mode (pure hand mode).

[0041] In one embodiment, the detection frequency of the detection signal DET may be the same as the response frequency of the response signal RES. Furthermore, the pen tip frequency of the pen tip signal TIP may be higher than the pen ring frequency of the pen ring signal RING. For example, the pen tip frequency may be 252 kHz and the pen ring frequency may be 176 kHz, but the invention is not limited thereto.

[0042] Therefore, even if the noise frequency is similar to the response frequency of the response signal RES, the electronic device 110 will not misidentify a finger or a noisy object as the stylus 120. For example, the noise frequency may be the same as the tip signal TIP of the response signal RES, but different from the ring number RING of the response signal RES. Alternatively, the noise frequency may be the same as the ring signal RING of the response signal RES, but different from the tip signal TIP of the response signal RES. Since a finger cannot simultaneously have two frequencies of signal, it will only have signals with the same frequency of noise interference. In other words, the response signal RES, which has two signal frequencies—the tip signal TIP and the ring signal RING—will not be interfered with by noise or a finger.

[0043] In this way, the detection method of this embodiment can determine the operating mode of the electronic device 110 based on the detection signal DET and the response signal RES, thereby avoiding the electronic device 110 from entering an incorrect operating mode and increasing the user experience.

[0044] Figure 3 This is a flowchart of a detection method according to an embodiment of the present invention. (Refer to...) Figure 1 and Figure 3 The detection method of this embodiment can be adapted to determine the operating mode of an electronic device 110 including a touch panel 111. The detection method may include steps S310, S320, S330 and S340.

[0045] In step S310, the communication unit 112 can receive the response signal RES according to the detection signal DET.

[0046] In one embodiment, the detection signal DET and the response signal RES are orientation signals. By using the frequency of multiple sets of pen ring signals RING and the numerical relationship between the pen tip signal TIP and the pen ring signal RING, the electronic device 110 can more effectively and accurately detect the approach and departure of the stylus 120.

[0047] In one embodiment, the pen tip signal TIP may include pen tip position information of the stylus 120 tip 121 on the touch panel 111. Furthermore, the pen ring signal RING may include pen ring position information of the stylus 120 ring 122 on the touch panel 111. In one embodiment, the electronic device 110 may receive multiple pen tip signals TIP and corresponding multiple pen ring signals RING in a first direction or a second direction of the touch panel 111. The signal strengths of the multiple pen tip signals TIP and corresponding multiple pen ring signals RING in the first direction or the second direction may be as shown in Table 1 below.

[0048] TIP 8 223 196 221 195 303 861 6364 4004 601 200 87 RING 95 111 165 190 299 434 503 662 660 533 311 227

[0049] Table 1

[0050] After receiving the response signal RES, the communication unit 112 can select the pen tip signal TIP with the highest signal strength and its corresponding pen ring signal RING from a plurality of pen tip signals TIP. For example, the processing unit 113 can select the pen tip signal TIP with a signal strength of 6364 and the pen ring signal RING with a signal strength of 662. Then, the processing unit 113 can divide and / or subtract the selected pen tip signal TIP and pen ring signal RING by their signal strengths to obtain a signal ratio and / or a signal difference. In other words, the numerical relationship may include the signal ratio obtained by dividing the pen tip signal TIP by the pen ring signal RING and / or the signal difference obtained by subtracting the pen ring signal RING from the pen tip signal TIP.

[0051] In step S320, processing unit 113 can determine whether the signal ratio of the pen tip signal TIP to the pen ring signal RING is greater than a preset threshold ratio and / or whether the signal difference between the pen tip signal TIP and the pen ring signal RING is greater than a preset threshold difference. When the determination result of processing unit 113 is "yes", proceed to step S330. When the determination result of processing unit 113 is "no", proceed to step S340.

[0052] In step S330, when the signal ratio is greater than a preset threshold ratio and / or the signal difference is greater than a preset threshold difference, the processing unit 113 can be configured to set the operation mode of the electronic device 110 to the second mode (pen-hand mode). Similarly, in step S340, when the signal ratio is not greater than a preset threshold ratio and / or the signal difference is not greater than a preset threshold difference, the processing unit 113 can be configured to set the operation mode of the electronic device 110 to the first mode (pure hand mode).

[0053] In this way, the detection method of this embodiment can determine the operating mode of the electronic device 110 based on the detection signal DET and the response signal RES, thereby avoiding the electronic device 110 from entering an incorrect operating mode and increasing the user experience.

[0054] Figure 4 This is a flowchart of a detection method according to an embodiment of the present invention. (Refer to...) Figure 1 and Figure 4 The detection method of this embodiment can be adapted to determine the operating mode of an electronic device 110 including a touch panel 111. The detection method may include steps S410, S420, S430, S440 and S450.

[0055] In step S410, the communication unit 112 can receive the response signal RES according to the detection signal DET.

[0056] In this example, the detection signal DET may include a first detection signal and a second detection signal. The response signal RES may include a first response signal corresponding to the first detection signal and a second response signal corresponding to the second detection signal. That is, instead of sending a signal to detect the stylus 120 only once, the communication unit 112 can send two signals to detect the stylus 120. Furthermore, the communication unit 112 can receive the corresponding first response signal and second response signal based on the two sent first and second detection signals.

[0057] In one embodiment, the communication unit 112 may be configured to continuously transmit the first detection signal and the second detection signal. In another embodiment, the communication unit 112 may be configured to non-continuously transmit the first detection signal and the second detection signal. However, the transmission method of the first detection signal and the second detection signal may be configured according to design requirements, and the present invention is not limited thereto.

[0058] It should be noted that the stylus 120 can be configured to emit a first response signal based on the first detection signal. Furthermore, the stylus 120 can be configured not to respond to the second detection signal. That is, the stylus 120 will only respond to the first detection signal and not to the second detection signal. In other words, the first response signal may include the stylus 120's tip signal (TIP) and ring signal (RING), and the second response signal may not include the stylus 120's tip signal (TIP) and ring signal (RING).

[0059] In one embodiment, due to the presence of noise in the environment, the first response signal may include not only the pen tip signal (TIP) and pen ring signal (RING) of the stylus 120, but also the noise in the environment. Furthermore, the second response signal may only include the noise in the environment. That is, both the first and second response signals include the noise in the environment.

[0060] In step S420, the processing unit 113 may be configured to obtain the pen tip signal and the pen ring signal based on the difference between the first response signal and the second response signal. In other words, the processing unit 113 may eliminate noise in the first response signal based on the noise shared by the first and second response signals to generate a filtered response signal. That is, the processing unit 113 may generate a filtered response signal by filtering the first response signal based on the second response signal, which only includes noise, such that the filtered response signal only includes the pen tip signal (TIP) and the pen ring signal (RING) of the stylus 120.

[0061] Next, the processing unit 113 can calculate the signal ratio and / or signal difference based on the pen tip signal TIP and pen ring signal RING of the filtered response signal. Specifically, the processing unit 113 can divide the pen tip signal TIP by the pen ring signal RING to obtain the signal ratio. Furthermore, the processing unit 113 can subtract the pen ring signal RING from the pen tip signal TIP to obtain the signal difference.

[0062] In step S430, the processing unit 113 may be configured to determine whether the signal ratio is greater than a preset threshold ratio and / or signal difference. When the determination result of the processing unit 113 is "yes", the process proceeds to step S440. When the determination result of the processing unit 113 is "no", the process proceeds to step S450.

[0063] In step S440, when the signal ratio is greater than a preset threshold ratio and / or the signal difference is greater than a preset threshold difference, the processing unit 113 can be configured to set the operation mode of the electronic device 110 to the second mode (pen-hand mode). Similarly, in step S450, when the signal ratio is not greater than a preset threshold ratio and / or the signal difference is not greater than a preset threshold difference, the processing unit 113 can be configured to set the operation mode of the electronic device 110 to the first mode (pure hand mode).

[0064] It should be noted that the filtered response signal only includes the pen tip signal (TIP) and pen ring signal (RING) of the stylus 120. Therefore, even if the ambient noise includes two frequencies that are the same as the pen tip signal (TIP) and the pen ring signal (RING), the processing unit 113 can still correctly determine the operating mode of the electronic device 110 without being disturbed by the noise.

[0065] In this way, the detection method of this embodiment can determine the operating mode of the electronic device 110 based on the detection signal DET and the response signal RES, thereby avoiding the electronic device 110 from entering an incorrect operating mode and increasing the user experience.

[0066] In summary, the electronic device and detection method of the present invention, by setting the response signal to include a pen tip signal and a pen ring signal, and determining the operating mode of the electronic device based on the numerical relationship between the pen tip signal and the pen ring signal, allows the electronic device to effectively and accurately detect the approach and departure of the stylus. Even in the presence of noise in the environment, the electronic device can avoid entering an incorrect operating mode and enhance the user experience.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions 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. An electronic device, characterized in that, include: Touch panel; A communication unit configured to emit a detection signal and to receive a response signal based on the detection signal; as well as A processing unit, coupled to the touch panel and the communication unit, is configured to determine the operating mode of the electronic device based on the response signal. The operating mode includes a first mode and a second mode. In the first mode, the input signal source of the electronic device includes a finger, and in the second mode, the input signal source includes the finger and a stylus. When the response signal includes the stylus tip signal and the stylus ring signal, the processing unit is configured to determine whether to set the operation mode to the second mode based on the numerical relationship between the stylus tip signal and the stylus ring signal.

2. The electronic device according to claim 1, characterized in that, The numerical relationship mentioned above includes the signal ratio obtained by dividing the pen tip signal by the pen ring signal and / or the signal difference obtained by subtracting the pen ring signal from the pen tip signal. When the signal ratio is greater than the threshold ratio and / or the signal difference is greater than the threshold difference, the processing unit is configured to set the operation mode to the second mode.

3. The electronic device according to claim 2, characterized in that, When the signal ratio is not greater than the threshold ratio and / or the signal difference is not greater than the threshold difference, the processing unit is configured to set the operation mode to the first mode.

4. The electronic device according to claim 1, characterized in that, When the response signal does not include the pen tip signal and the pen ring signal, the processing unit is configured to set the operation mode to the first mode.

5. The electronic device according to claim 1, characterized in that, The detection signal includes a first detection signal and a second detection signal, and the response signal includes a first response signal corresponding to the first detection signal and a second response signal corresponding to the second detection signal. The processing unit is configured to obtain the pen tip signal and the pen ring signal based on the difference between the first response signal and the second response signal.

6. The electronic device according to claim 5, characterized in that, The stylus is configured to emit the first response signal in response to the first detection signal, and the stylus is configured not to respond to the second detection signal.

7. The electronic device according to claim 5, characterized in that, The communication unit is configured to continuously transmit the first detection signal and the second detection signal.

8. The electronic device according to claim 5, characterized in that, The communication unit is configured to transmit the first detection signal and the second detection signal discontinuously.

9. The electronic device according to claim 1, characterized in that, The detection frequency of the detection signal is the same as the response frequency of the response signal, and the pen tip frequency of the pen tip signal is higher than the pen ring frequency of the pen ring signal.

10. The electronic device according to claim 1, characterized in that, The detection signal includes an entry detection signal or a withdrawal detection signal. When the operation mode is the first mode, the communication unit is configured to receive the response signal according to the pen insertion detection signal. When the operation mode is the second mode, the communication unit is configured to receive the response signal according to the pen retraction detection signal.

11. The electronic device according to claim 1, characterized in that, The pen tip signal includes the pen tip position information of the stylus on the touch panel, and the pen ring signal includes the pen ring position information of the stylus on the touch panel.

12. A detection method suitable for determining the operating mode of an electronic device including a touch panel, characterized in that, The detection method includes: Send a detection signal; Receive a response signal based on the detection signal; The operation mode is determined based on the response signal, wherein the operation mode includes a first mode and a second mode, the input signal source of the electronic device in the first mode includes a finger, and the input signal source in the second mode includes the finger and a stylus; and When the response signal includes the stylus tip signal and the stylus ring signal, it is determined whether to set the operation mode to the second mode based on the numerical relationship between the stylus tip signal and the stylus ring signal.

13. The detection method according to claim 12, characterized in that, The numerical relationship mentioned above includes the signal ratio obtained by dividing the pen tip signal by the pen ring signal and / or the signal difference obtained by subtracting the pen ring signal from the pen tip signal. When the signal ratio is greater than the threshold ratio and / or the signal difference is greater than the threshold difference, the operation mode is set to the second mode.

14. The detection method according to claim 13, characterized in that, Also includes: When the signal ratio is not greater than the threshold ratio and / or the signal difference is not greater than the threshold difference, the operation mode is set to the first mode.

15. The detection method according to claim 12, characterized in that, Also includes: When the response signal does not include the pen tip signal and the pen ring signal, the operation mode is set to the first mode.

16. The detection method according to claim 12, characterized in that, The detection signal includes a first detection signal and a second detection signal, and the response signal includes a first response signal corresponding to the first detection signal and a second response signal corresponding to the second detection signal. The pen tip signal and the pen ring signal are obtained based on the difference between the first response signal and the second response signal.

17. The detection method according to claim 16, characterized in that, The stylus is configured to emit the first response signal in response to the first detection signal, and the stylus is configured not to respond to the second detection signal.

18. The detection method according to claim 16, characterized in that, Also includes: The first detection signal and the second detection signal are continuously emitted.

19. The detection method according to claim 16, characterized in that, Also includes: The first detection signal and the second detection signal are emitted discontinuously.

20. The detection method according to claim 12, characterized in that, The detection frequency of the detection signal is the same as the response frequency of the response signal, and the pen tip frequency of the pen tip signal is higher than the pen ring frequency of the pen ring signal.

21. The detection method according to claim 12, characterized in that, The detection signal includes an entry detection signal or a withdrawal detection signal. When the operation mode is the first mode, the response signal is received based on the pen insertion detection signal. When the operation mode is the second mode, the response signal is received according to the pen retraction detection signal.

22. The detection method according to claim 12, characterized in that, The pen tip signal includes the pen tip position information of the stylus on the touch panel, and the pen ring signal includes the pen ring position information of the stylus on the touch panel.

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