Liquid inlet detection system of capacitance pen and capacitance pen

Abstract

The utility model provides a liquid inlet detection system of a capacitance pen and the capacitance pen, and belongs to the technical field of capacitance pens. The liquid inlet detection system of the capacitance pen comprises a liquid inlet detection device, a transistor and a pull-up resistor, the first end of the transistor is connected with the first power supply end through the liquid inlet detection device, and the second end of the transistor is grounded; one end of the pull-up resistor is connected with the third end of the transistor, the other end of the pull-up resistor is connected with the second power supply end, a liquid inlet detection point is arranged between one end of the pull-up resistor and the third end of the transistor, and when the liquid inlet detection device is in contact with the liquid, the voltage of the liquid inlet detection point is switched from the first voltage to the second voltage. According to the capacitance pen, the liquid inlet detection device makes contact with the liquid, the voltage of the liquid inlet detection point is switched from the first voltage to the second voltage, it is indicated that liquid enters the capacitance pen, and the liquid inlet condition can be detected when the liquid enters the capacitance pen.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of capacitive pens, and particularly relates to a liquid inlet detection system of a capacitive pen and the capacitive pen. BACKGROUND

[0002] Due to the portability of the capacitive pen, the capacitive pen may be subjected to liquid inlet such as water dripping and falling into water in some use scenarios, thereby affecting the normal use of the capacitive pen. Therefore, the capacitive pen needs to be provided with a special liquid inlet detection system to detect the liquid inlet. CONTENT OF THE UTILITY MODEL

[0003] In view of the above problems, the application provides a liquid inlet detection system of a capacitive pen and the capacitive pen to detect the liquid inlet when the capacitive pen is subjected to liquid inlet.

[0004] The application provides a liquid inlet detection system of a capacitive pen. The liquid inlet detection system of the capacitive pen comprises: a liquid inlet detection device; a transistor, the transistor having a first end, a second end and a third end, the first end being connected with the first power supply end through the liquid inlet detection device, and the second end being grounded; and a pull-up resistor, one end of the pull-up resistor being connected with the third end, the other end of the pull-up resistor being connected with the second power supply end, and the one end of the pull-up resistor and the third end having a liquid inlet detection point, when the liquid inlet detection device contacts liquid, the transistor is turned on, and the voltage of the liquid inlet detection point is switched from a first voltage to a second voltage.

[0005] In some embodiments, the liquid inlet detection device of the capacitive pen comprises a first conductive piece and a second conductive piece, one end of the first conductive piece being connected with the first power supply end, one end of the second conductive piece being connected with the first end, and the other end of the first conductive piece and the other end of the second conductive piece being spaced apart from each other.

[0006] In some embodiments, one of the other end of the first conductive piece and the other end of the second conductive piece comprises an arc-shaped portion, and the arc-shaped portion surrounds the other one of the other end of the first conductive piece and the other end of the second conductive piece.

[0007] In some embodiments, the liquid inlet detection system of the capacitive pen further comprises: a mainboard, the mainboard having a recess, and the other end of the first conductive piece and the other end of the second conductive piece being arranged in the recess.

[0008] In some embodiments, the capacitive pen has a plurality of target positions, and the number of the first conductive pieces and the number of the second conductive pieces are both a plurality, and each first conductive piece and each second conductive piece are arranged at a corresponding target position.

[0009] In some embodiments, the liquid inlet detection device is arranged at a position close to the pen tip in the capacitive pen.

[0010] In some embodiments, the liquid inlet detection system of the capacitive pen further comprises:

[0011] a first voltage dividing unit, one end of the first voltage dividing unit being connected with the first power supply end, the other end of the first voltage dividing unit being connected with the liquid inlet detection device, and / or

[0012] a second voltage dividing unit, one end of the second voltage dividing unit being connected with the first end, the other end of the second voltage dividing unit being grounded.

[0013] In some embodiments, the liquid inlet detection system of the capacitive pen further comprises: a detection module comprising a first input end and a first output end, the first input end being connected with the liquid inlet detection point; and a storage module, the first output end being connected with the storage module, the storage module being configured to store the liquid inlet time and the liquid inlet position.

[0014] In some embodiments, the liquid inlet detection system of the capacitive pen further comprises: a detection module comprising a first input end and a second output end, the first input end being connected with the liquid inlet detection point; a battery protection module comprising a second input end, the second input end being connected with the second output end; and a battery, the battery being connected with the battery protection module; when the voltage of the liquid inlet detection point is switched from the first voltage to the second voltage, the detection module is configured to stop the power supply of the battery through the battery protection module.

[0015] Correspondingly, the application also provides a capacitive pen comprising the liquid inlet detection system as described above.

[0016] The application has the beneficial effect that the application provides a liquid inlet detection system of a capacitive pen and a capacitive pen. The liquid inlet detection system of the capacitive pen comprises: a liquid inlet detection device, a transistor, and a pull-up resistor. The first end of the transistor is connected with the first power supply end through the liquid inlet detection device, and the second end of the transistor is grounded. One end of the pull-up resistor is connected with the third end of the transistor, and the other end of the pull-up resistor is connected with the second power supply end. There is a liquid inlet detection point between one end of the pull-up resistor and the third end of the transistor. When the liquid inlet detection device contacts liquid, the voltage of the liquid inlet detection point is switched from the first voltage to the second voltage. In the application, when the liquid inlet detection device contacts liquid, the voltage of the liquid inlet detection point is switched from the first voltage to the second voltage, which indicates that the capacitive pen is filled with liquid, so that the liquid inlet condition can be detected when the capacitive pen is filled with liquid. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0018] Figure 1 FIG. 1 is a structural schematic diagram of a liquid inlet detection system of a capacitive pen according to an embodiment of the application;

[0019] Figure 2 Another example structure schematic diagram of the liquid inlet detection system provided by the embodiment of the present application is shown in the figure;

[0020] Figure 3 Another example structure schematic diagram of the liquid inlet detection system provided by the embodiment of the present application is shown in the figure;

[0021] Figure 4 An example structure schematic diagram of the liquid inlet detection device provided by the embodiment of the present application in a capacitive pen is shown in the figure;

[0022] Figure 5 Another example structure schematic diagram of the liquid inlet detection system provided by the embodiment of the present application is shown in the figure;

[0023] Figure 6 Another example structure schematic diagram of the liquid inlet detection system provided by the embodiment of the present application is shown in the figure;

[0024] Figure 7 Another example structure schematic diagram of the liquid inlet detection system provided by the embodiment of the present application is shown in the figure;

[0025] Figure 8 Another example structure schematic diagram of the liquid inlet detection system provided by the embodiment of the present application is shown in the figure;

[0026] Figure 9 Another example structure schematic diagram of the liquid inlet detection system provided by the embodiment of the present application is shown in the figure;

[0027] Figure 10 Another example structure schematic diagram of the liquid inlet detection system provided by the embodiment of the present application is shown in the figure.

[0028] Explanation of reference signs:

[0029] 10-liquid inlet detection device, 11-first conductive member, 12-second conductive member, 13-arc-shaped portion, 20-transistor, 21-first end, 22-second end, 23-third end, 30-pull-up resistor, 40-main board, 41-groove, 50-first voltage division unit, 60-second voltage division unit, 70-detection module, 71-first input end, 72-first output end, 73-second output end, 80-storage module, 90-battery protection module, 91-second input end, 100-battery, V1-first power supply end, V2-second power supply end, S1-liquid inlet detection point. DETAILED DESCRIPTION

[0030] With reference to the drawings and the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0031] In the description of the present application, it should be understood that the specific implementation described herein is only used to illustrate and explain the present application, and is not used to limit the present application. The orientations or positional relationships indicated by the terms "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer", and the like are based on the orientations or positional relationships shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and are not used to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more features.

[0032] The present application provides a liquid inlet detection system of a capacitive pen and a capacitive pen, which are described in detail below. It should be noted that the description order of the following embodiments is not used to limit the preferred order of the embodiments of the present application. In the following embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0033] Due to the portability of the capacitive pen, the capacitive pen may be exposed to water in some use scenarios, such as being splashed with water or falling into water, which may affect the normal use of the capacitive pen. Some capacitive pens may take some waterproof measures to improve the water resistance of the device, which may include the use of waterproof materials, sealed interfaces, waterproof coatings, etc. These measures can reduce the risk of liquid ingress to some extent, but cannot completely eliminate it. Therefore, the capacitive pen urgently needs to be provided with a special liquid inlet detection system to detect the liquid inlet condition.

[0034] Therefore, the application provides a liquid inlet detection system of a capacitive pen, which comprises a liquid inlet detection device, a transistor, and a pull-up resistor.

[0035] Please refer to Figure 1 , Figure 1 FIG. 1 is a structural schematic diagram of a liquid inlet detection system of a capacitive pen according to an embodiment of the application. The application provides a liquid inlet detection system of a capacitive pen, which comprises a liquid inlet detection device 10, a transistor 20, and a pull-up resistor 30. The transistor 20 has a first end 21, a second end 22, and a third end 23. The first end 21 is connected to a first power supply end V1 via the liquid inlet detection device 10, and the second end 22 is grounded. One end of the pull-up resistor 30 is connected to the third end 23, and the other end of the pull-up resistor 30 is connected to a second power supply end V2. The pull-up resistor 30 has a liquid inlet detection point S1 between the one end and the third end 23. When the liquid inlet detection device 10 contacts liquid, the voltage of the liquid inlet detection point S1 is switched from a first voltage to a second voltage.

[0036] It should be understood that the liquid inlet detection device 10 is used as a device for detecting whether liquid has entered. When the liquid inlet detection device 10 contacts liquid, it indicates that liquid has entered the capacitive pen. The first power supply end V1 and the second power supply end V2 can be provided by a power supply or a backup power supply, which can be but is not limited to a battery or other power supply device. The power supply voltages of the first power supply end V1 and the second power supply end V2 can be the same or different based on the specific design of the scheme.

[0037] For example, the transistor 20 is an NPN-type triode, the first end 21 is a collector, the second end 22 is an emitter, and the third end 23 is a base. The conduction of the transistor 20 causes the voltage of the liquid inlet detection point S1 to be switched from the first voltage to the second voltage. That is, when the liquid inlet detection device 10 does not contact liquid, it indicates that no liquid has entered the capacitive pen, at which time the transistor 20 is cut off, and the voltage of the liquid inlet detection point S1 is the first voltage. When the liquid inlet detection device 10 contacts liquid, it indicates that liquid has entered the capacitive pen, at which time the transistor 20 is turned on, and the voltage of the liquid inlet detection point S1 is the second voltage. Therefore, when the voltage of the liquid inlet detection point S1 is switched from the first voltage to the second voltage, it indicates that liquid has entered the capacitive pen. The second voltage is less than the first voltage.

[0038] By the above technical solution, the liquid inlet detection system of the capacitive pen comprises: a liquid inlet detection device 10, a transistor 20, and a pull-up resistor 30; the transistor 20 has a first end 21, a second end 22, and a third end 23, the first end 21 is connected with the first power supply end V1 through the liquid inlet detection device 10, and the second end 22 is grounded; the pull-up resistor 30 has one end connected with the third end 23 and the other end connected with the second power supply end V2, and the pull-up resistor 30 has a liquid inlet detection point S1 between the one end and the third end 23; when the liquid inlet detection device 10 contacts liquid, the voltage of the liquid inlet detection point S1 is switched from a first voltage to a second voltage, so that the liquid inlet condition can be detected, and corresponding measures can be taken in time to protect the equipment from liquid damage. In this application, when the liquid inlet detection device 10 contacts liquid, the transistor 20 is turned on to switch the voltage of the liquid inlet detection point S1 from the first voltage to the second voltage, so that the liquid inlet condition can be detected when the capacitive pen is liquid-inlet. In addition, the pull-up resistor 30 maintains the voltage of the liquid inlet detection point S1 as the first voltage when the liquid inlet detection device 10 does not contact liquid, which helps to prevent the input line from floating or interference and improves the reliability of the system.

[0039] Please refer to Figure 2 , Figure 2 Another example structure schematic diagram of the liquid inlet detection system provided in the embodiments of the application is shown. In some embodiments, the liquid inlet detection device 10 comprises a first conductive part 11 and a second conductive part 12, one end of the first conductive part 11 is connected with the first power supply end V1, one end of the second conductive part 12 is connected with the first end 21, and the other end of the first conductive part 11 is spaced apart from the other end of the second conductive part 12.

[0040] In the application, the other end of the first conductive part 11 is spaced apart from the other end of the second conductive part 12, that is, the other end of the first conductive part 11 is disconnected from the other end of the second conductive part 12 when the liquid inlet detection device 10 does not contact liquid; the first conductive part 11 and the second conductive part 12 are connected when the liquid inlet detection device 10 contacts liquid based on the conductive performance of the liquid, so that the first power supply end V1 is connected with the first end 21 through the liquid inlet detection device 10, and the transistor 20 is turned on, thereby lowering the voltage of the liquid inlet detection point S1, and switching the voltage of the liquid inlet detection point S1 from the first voltage to the second voltage.

[0041] It should be noted that the first conductive part 11 and the second conductive part 12 in the application can be designed based on different shapes and materials; for example, the first conductive part 11 and the second conductive part 12 can be realized by solder pads.

[0042] By the technical scheme, the liquid inlet detection device 10 includes the first conductive part 11 and the second conductive part 12 which are not in contact with each other, and the electrically conductive performance of the liquid is combined, so that when the capacitance pen enters the water, the first conductive part 11 and the second conductive part 12 can be connected, and then the transistor 20 is turned on, thereby reducing the voltage of the liquid inlet detection point S1, realizing the switching of the voltage of the liquid inlet detection point S1 from the first voltage to the second voltage, and being able to detect the liquid inlet condition when the capacitance pen enters the liquid. The liquid inlet detection device 10 is simple in structure and effective.

[0043] Please refer to Figure 3 , Figure 3 Another example structure schematic diagram of the liquid inlet detection system provided by the embodiment is provided. In some embodiments, one of the other end of the first conductive part 11 and the other end of the second conductive part 12 includes an arc-shaped part 13, and the arc-shaped part 13 surrounds the other of the other end of the first conductive part 11 and the other end of the second conductive part 12.

[0044] That is, in some embodiments, the other end of the first conductive part 11 includes an arc-shaped part 13, and the arc-shaped part 13 surrounds the other end of the second conductive part 12.

[0045] In some embodiments, the other end of the second conductive part 12 includes an arc-shaped part 13, and the arc-shaped part 13 surrounds the other end of the first conductive part 11.

[0046] It should be understood that the one of the other end of the first conductive part 11 and the other end of the second conductive part 12 which does not include the arc-shaped part 13 can also be arc-shaped or other shapes, so as to increase the surface area of the liquid in contact with the first conductive part 11 and the second conductive part 12.

[0047] By the technical scheme, one of the other end of the first conductive part 11 and the other end of the second conductive part 12 includes an arc-shaped part 13, and the arc-shaped part 13 surrounds the other of the other end of the first conductive part 11 and the other end of the second conductive part 12; so that when detecting the liquid inlet condition, the other end of the first conductive part 11 and the other end of the second conductive part 12 increase the surface area of the liquid in contact with the arc-shaped part 13, improve the contact of the liquid with the conductive part, and can timely detect the existence of the liquid regardless of the direction of the liquid, thereby improving the timeliness of the liquid inlet detection.

[0048] Please refer to Figure 4 , Figure 4 An example structure schematic diagram of the liquid inlet detection device in the capacitance pen is provided. In some embodiments, the liquid inlet detection system further includes a mainboard 40, and the mainboard 40 can have a groove 41, and the other end of the first conductive part 11 and the other end of the second conductive part 12 are arranged in the groove 41.

[0049] It should be noted that the liquid inlet detection system is also arranged on the mainboard 40. The mainboard 40 is a circuit mainboard.

[0050] In some embodiments, the groove 41 presents a recessed shape, which can be an arc-shaped recessed area. The arc shape can be a circular arc, an elliptical arc, or other arc variants. The specific shape can be adjusted according to design requirements.

[0051] In some embodiments, the other end of the first conductive part 11 and the other end of the second conductive part 12 are arranged at the arc-shaped bottom of the groove 41.

[0052] Through the above technical solution, the other end of the first conductive part 11 and the other end of the second conductive part 12 are arranged in the groove 41. The design of the groove 41 can make the liquid entering the capacitive pen flow into the groove first, and then make the other end of the first conductive part 11 and the other end of the second conductive part 12 in the groove conductive based on the liquid flow first. This makes the liquid contact the other end of the first conductive part 11 and the other end of the second conductive part 12 in the groove faster, and detects the liquid entering condition of the capacitive pen, improves the speed of capacitive pen liquid detection, and detects the liquid entering condition of the capacitive pen in time. And based on the recess of the groove 41, the liquid flows to the bottom of the groove first, and then the other end of the first conductive part 11 and the other end of the second conductive part 12 are arranged at the arc-shaped bottom of the groove 41, so that the other end of the first conductive part 11 and the other end of the second conductive part 12 in the groove are preferentially conductive based on the liquid flow.

[0053] It should be noted that the first conductive part 11 and the second conductive part 12 are arranged as close as possible based on the premise of mutual spacing, thereby shortening the distance between the liquid inlet detection positions, and improving the capacitive pen liquid detection speed.

[0054] Please refer to Figure 5 , Figure 5 Another example structure diagram of the liquid inlet detection system provided by the embodiments of the present application is provided. In some embodiments, the capacitive pen has a plurality of target positions, and the number of the first conductive part 11 and the second conductive part 12 is a plurality. Each first conductive part 11 and each second conductive part 12 is arranged at a corresponding target position.

[0055] The liquid inlet detection device 10 can be based on the requirement of the liquid inlet detection position in the capacitive pen to adopt a plurality of first conductive parts 11 and a plurality of second conductive parts 12. The plurality of first conductive parts 11 are connected with the first power supply providing end V1, and the plurality of second conductive parts 12 are connected with the first end 21. When at least one of the plurality of first conductive parts 11 and at least one of the plurality of second conductive parts 12 are connected under the action of the liquid conductor, the liquid inlet detection of the plurality of target positions is realized.

[0056] In some embodiments, the liquid inlet detection device 10 is arranged in the capacitive pen close to the pen tip. Based on the structural configuration of the capacitive pen, which is usually integrally formed with the pen barrel, the pen tip is connected to the pen barrel, and then the liquid inlet is generally from the pen tip. Therefore, the liquid inlet detection device 10 is arranged in the capacitive pen close to the pen tip, and then the liquid inlet can be detected in time when the liquid inlet is detected at the pen tip. Further, in some embodiments, the at least one first conductive part 11 and the at least one second conductive part 12 can be arranged in the capacitive pen at the target positions close to the pen tip. In some embodiments, the at least one first conductive part 11 and the at least one second conductive part 12 can be arranged at the edge positions of the main plate 40 close to the pen tip.

[0057] In addition, in some embodiments, the tail of the pen barrel of the capacitive pen is provided with a pen cap, and then the liquid inlet can also be from the tail end of the pen. Therefore, the at least one first conductive part 11 and the at least one second conductive part 12 can be arranged in the capacitive pen at the target positions close to the pen tail. In some embodiments, the at least one first conductive part 11 and the at least one second conductive part 12 can be arranged at the edge positions of the main plate 40 close to the pen tail.

[0058] Through the above technical solution, the number of the first conductive part 11 and the second conductive part 12 is multiple, which can be self-set according to the requirements of the scheme, and the precise detection of the liquid inlet of the capacitive pen can be realized. The first conductive part 11 and the second conductive part 12 at different positions can cover a wider area, so that the liquid inlet of the capacitive pen can be detected in time when the liquid enters any position, and the liquid inlet detection of the capacitive pen is more comprehensive.

[0059] In some embodiments, the liquid inlet detection system further comprises: a first voltage dividing unit 50, one end of the first voltage dividing unit 50 is connected with the first power supply end V1, and the other end of the first voltage dividing unit 50 is connected with the liquid inlet detection device 10, and / or

[0060] a second voltage dividing unit 60, one end of the second voltage dividing unit 60 is connected with the first end 21, and the other end of the second voltage dividing unit 60 is grounded.

[0061] That is, please refer to Figure 6 , Figure 6 Another example structure diagram of the liquid inlet detection system provided by the embodiments of the present application is provided. In some embodiments, the liquid inlet detection system further comprises: a first voltage dividing unit 50, one end of the first voltage dividing unit 50 is connected with the first power supply end V1, and the other end of the first voltage dividing unit 50 is connected with the liquid inlet detection device 10.

[0062] In some embodiments, the liquid inlet detection system further comprises: a second voltage dividing unit 60, one end of the second voltage dividing unit 60 is connected with the first end 21, and the other end of the second voltage dividing unit 60 is grounded.

[0063] Please refer toFigure 7 , Figure 7 Another example structure of the liquid inlet detection system provided by the embodiments of the present application is shown in the schematic diagram. In some embodiments, the liquid inlet detection system further comprises: a first voltage dividing unit 50 and a second voltage dividing unit 60, one end of the first voltage dividing unit 50 is connected with the first power supply end V1, the other end of the first voltage dividing unit 50 is connected with the liquid inlet detection device 10, one end of the second voltage dividing unit 60 is connected with the first end 21, and the other end of the second voltage dividing unit 60 is grounded.

[0064] In some embodiments, the first voltage dividing unit 50 is a resistor. Other voltage dividing devices can also be used based on the design scheme. The voltage of the power supply provided by the first power supply end V1 is divided into a lower voltage by the first voltage dividing unit 50. Specifically, when the liquid inlet detection device 10 contacts the liquid, the first end 21 is turned on with the first power supply end V1 through the first voltage dividing unit 50, the first end 21 and the third end 23 meet the turn-on condition through the voltage division of the first voltage dividing unit 50 and the second voltage dividing unit 60, and then the voltage of the liquid inlet detection point S1 is pulled down from the first voltage to the second voltage, so as to achieve the purpose of detecting the liquid inlet.

[0065] In some embodiments, the second voltage dividing unit 60 is a resistor. Other voltage dividing devices can also be used based on the design scheme.

[0066] Through the above technical solutions, on the one hand, the voltage of the power supply provided by the first power supply end V1 is divided into a lower voltage by the second voltage dividing unit 60 cooperating with the first voltage dividing unit 50. Specifically, when the liquid inlet detection device contacts the liquid, the first end 21 is turned on with the first power supply end V1 through the first voltage dividing unit 50, the first end 21 and the third end 23 meet the turn-on condition through the voltage division of the first voltage dividing unit 50 and the second voltage dividing unit 60, and then the voltage of the liquid inlet detection point S1 is pulled down from the first voltage to the second voltage, so as to achieve the purpose of detecting the liquid inlet. On the other hand, the second voltage dividing unit 60 can connect the circuit with the ground to form a stable reference point, which helps to reduce the noise and interference in the circuit and improve the performance and stability of the circuit.

[0067] Please refer to Figure 8 , Figure 8 Another example structure of the liquid inlet detection system provided by the embodiments of the present application is shown in the schematic diagram. In some embodiments, the liquid inlet detection system further comprises: a detection module 70, including a first input end 71 and a first output end 72, the first input end 71 is connected with the liquid inlet detection point S1; a storage module 80, the first output end 72 is connected with the storage module 80, and the storage module 80 is used for storing the liquid inlet time and the liquid inlet position.

[0068] The detection module 70 in the present application can use devices such as MCU.

[0069] Through the technical solution, the detection module 70 switches the voltage of the liquid inlet detection point S1 from the first voltage to the second voltage, the first input end 71 of the detection module 70 detects the voltage switching, that is, water enters the inside of the capacitive pen, the detection module 70 records the abnormal log into the storage module 80 through the first output end 72, that is, the storage module 80 stores the liquid inlet time and the liquid inlet position. The liquid inlet time refers to the time point at which the detection module 70 detects the voltage switching, and the liquid inlet position refers to the position at which the liquid inlet occurs, which can be obtained based on the position at which the liquid inlet detection device 10 is placed. These data can be stored for subsequent analysis and processing, and can provide data for the analysis of abnormal problems, which helps to optimize and improve the design and performance of the capacitive pen.

[0070] Referring to Figure 9 , Figure 9 Another example structure of the liquid inlet detection system provided by the embodiments of the present application is shown in the schematic diagram. In some embodiments, the liquid inlet detection system further comprises a detection module 70 comprising a first input end 71 and a second output end 73, the first input end 71 being connected to the liquid inlet detection point S1; a battery protection module 90 comprising a second input end 91, the second input end 91 being connected to the second output end 73; and a battery 100, the battery 100 being connected to the battery protection module 90. When the voltage of the liquid inlet detection point S1 switches from the first voltage to the second voltage, the detection module 70 is configured to stop the power supply of the battery 100 through the battery protection module 90.

[0071] In some embodiments, the battery is a lithium battery, and the battery protection module 90 is a lithium battery protection circuit.

[0072] Through the technical solution, the detection module 70 switches the voltage of the liquid inlet detection point S1 from the first voltage to the second voltage, the first input end 71 of the detection module 70 detects the voltage switching, that is, water enters the inside of the capacitive pen; at this time, the detection module 70 sends a control signal to the second input end 91 of the battery protection module 90 through the second output end 73, and controls the battery 100 to stop the power supply through the battery protection module 90. In this way, automatic power-off protection can be realized in the capacitive pen, and stopping the power supply can avoid the current passing through the water inlet part, and can prevent further damage to the internal circuit of the capacitive pen caused by continuing to power on after water enters. At the same time, the reliability and safety of the capacitive pen are improved, and the risk of further circuit damage is reduced.

[0073] Referring to Figure 10 , Figure 10Another example structure of the liquid inlet detection system provided by the embodiments of the present application is shown in the schematic diagram. In some embodiments, the liquid inlet detection system further comprises a detection module 70, which comprises a first input end 71, a first output end 72, and a second output end 73, the first input end 71 is connected to the liquid inlet detection point S1; a battery protection module 90, which comprises a second input end 91, the second input end 91 is connected to the second output end 73; a battery 100, the battery 100 is connected to the battery protection module 90; a storage module 80, the first output end 72 is connected to the storage module 80; when the voltage of the liquid inlet detection point S1 is switched from the first voltage to the second voltage, on the one hand, the detection module 70 is used to stop the power supply of the battery 100 through the battery protection module 90, on the other hand, the storage module 80 is used to store the liquid inlet time and the liquid inlet position, that is, the detection module 70 records the abnormal log into the storage module 80.

[0074] Through the above technical solution, the detection module 70 performs real-time monitoring by detecting the liquid inlet state of the liquid inlet detection point S1, and the detection module 70 detects the voltage switching, that is, the water ingress in the capacitive pen, and automatically performs power-off protection and log recording; specifically, the abnormal log is recorded into the storage module 80, which can provide data for determining the analysis of abnormal problems, and is helpful for optimizing and improving the design and performance of the capacitive pen; at the same time, the battery protection module 90 controls the battery 100 to stop the power supply, thereby realizing the automatic power-off protection in the capacitive pen.

[0075] Correspondingly, the present application comprises a capacitive pen comprising the liquid inlet detection system in the above embodiments. Therefore, the capacitive pen comprises all the technical features and beneficial effects of the liquid inlet detection system, and the present application will not be described here.

[0076] The liquid inlet detection system of the capacitive pen and the capacitive pen provided by the present application are described in detail above, and specific examples are applied to explain the principles and implementation modes of the present application; the above description of the embodiments is only used to help understand the method and core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed, and the above description should not be understood as limiting the present application.

Claims

1. A liquid inflow detection system for a capacitive stylus, characterized in that: include: Liquid inlet detection device; a transistor, the transistor having a first end, a second end, and a third end, the first end being connected to a first power supply end via the liquid inflow detection device, and the second end being grounded; A pull-up resistor, one end of the pull-up resistor is connected to the third end, the other end of the pull-up resistor is connected to the second power supply end, and a liquid inlet detection point is provided between the one end of the pull-up resistor and the third end. When the liquid inlet detection device contacts the liquid, the transistor is turned on, and the voltage of the liquid inlet detection point is switched from the first voltage to the second voltage.

2. The liquid inlet detection system according to claim 1, characterized in that: The liquid inlet detection device includes a first conductive member and a second conductive member, one end of the first conductive member is connected to the first power supply end, one end of the second conductive member is connected to the first end, and the other end of the first conductive member and the other end of the second conductive member are spaced apart from each other.

3. The liquid inlet detection system according to claim 2, characterized in that: One of the other end of the first conductive member and the other end of the second conductive member includes an arc portion that surrounds the other of the other end of the first conductive member and the other end of the second conductive member.

4. The liquid inlet detection system according to claim 2, characterized in that: Also includes: The main board has a groove, and the other end of the first conductive member and the other end of the second conductive member are arranged in the groove.

5. The liquid inflow detection system according to claim 2, characterized in that: There are multiple target positions in the capacitive stylus. The number of the first conductive member and the number of the second conductive member are both multiple, and each of the first conductive member and each of the second conductive members are respectively arranged at the corresponding target position.

6. The liquid inflow detection system according to claim 1, characterized in that: The liquid inlet detection device is arranged in a position close to the pen tip in the capacitive pen.

7. The liquid inflow detection system according to claim 1, characterized in that: Also includes: a first voltage dividing unit, one end of which is connected to the first power supply terminal, and the other end of which is connected to the liquid inflow detection device, and / or A second voltage dividing unit, one end of the second voltage dividing unit is connected to the first end, and the other end of the second voltage dividing unit is grounded.

8. The liquid inflow detection system according to claim 1, characterized in that: Also includes: A detection module comprising a first input end and a first output end, wherein the first input end is connected to the liquid inlet detection point; A storage module, wherein the first output end is connected to the storage module, and the storage module is used to store the liquid inlet time and the liquid inlet position.

9. The liquid inflow detection system according to claim 1, characterized in that: Also includes: A detection module comprising a first input end and a second output end, wherein the first input end is connected to the liquid inlet detection point; The battery protection module includes a second input terminal connected to the second output terminal; a battery, the battery being connected to the battery protection module; When the voltage at the liquid inlet detection point switches from a first voltage to a second voltage, the detection module is configured to stop the battery from supplying power via the battery protection module.

10. A capacitive stylus, characterized in that: The invention comprises a liquid ingress detection system as claimed in any one of claims 1 to 9.

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