Stylus testing device, stylus pressure curve testing method and hover value testing method

Abstract

Disclosed in the present application are a stylus testing device, a stylus pressure curve testing method and a hover value testing method. The testing device comprises: a motion execution module, the motion execution module being used for being connected to a stylus; and a measurement and control module, the measurement and control module comprising a sensing electrode, a pressure sensor and a control circuit, wherein the sensing electrode is used for sensing a sensing signal sent by the tip of the stylus; the pressure sensor is used for sensing the pressure applied by the tip of the stylus and generating a pressure signal on the basis of the pressure; the control circuit is electrically connected to the sensing electrode and the pressure sensor separately, so as to obtain the sensing signal and the pressure signal; the control circuit is electrically connected to the motion execution module; the control circuit is configured to drive the motion execution module to drive the tip of the stylus to get close to the pressure sensor, and enable the tip of the stylus to apply pressure to the pressure sensor; and the sensing electrode and the pressure sensor are arranged adjacent to each other, so as to sense the sensing signal sent by the stylus while the stylus gets close to the pressure sensor.

Description

Stylus testing device and method for testing stylus pressure curve and hover value

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on November 14, 2023, with application number 202311514626.X. The entire contents of the above application are incorporated by reference into this application. Technical Field

[0002] The present invention relates to the technical field of stylus pen testing, and in particular to a stylus pen testing device, a method for testing a stylus pen pressure curve, and a method for testing a hover value. Background Art

[0003] Styluses are becoming increasingly common in electronic products, ranging from traditional capacitive passive pens to capacitive active pens and electromagnetic pens. These styluses provide users with writing functions and are widely used in mobile phones, especially tablets, conference whiteboards, and other fields. Determining the key parameters of styluses is a key research topic in this field. Technical issues

[0004] The testing of important parameters of a stylus pen is usually performed manually, which has the disadvantage of low automation. Technical Solutions

[0005] In a first aspect, the present application proposes a stylus testing device, comprising:

[0006] a motion execution module, the motion execution module being configured to be connected to the stylus;

[0007] a measurement and control module, the measurement and control module comprising a sensing electrode, a pressure sensor, and a control circuit; the sensing electrode is used to sense a sensing signal emitted by the tip of the stylus pen, the pressure sensor is used to sense the pressure applied by the tip of the stylus pen and generate a pressure signal based on the pressure; the control circuit is electrically connected to the sensing electrode and the pressure sensor, respectively, to obtain the sensing signal and the pressure signal;

[0008] The control circuit is electrically connected to the motion execution module; the control circuit is configured to drive the motion execution module to bring the tip of the stylus pen close to the pressure sensor, and enable the tip of the stylus pen to apply pressure to the pressure sensor; the sensing electrode and the pressure sensor are arranged adjacent to each other to sense the sensing signal emitted by the tip of the stylus pen when the tip of the stylus pen approaches the pressure sensor.

[0009] The stylus pen testing device, wherein the motion execution module includes:

[0010] a drive assembly, the drive assembly being electrically connected to the control circuit;

[0011] A pen holder assembly is connected to the drive assembly, and the pen holder assembly is used to place a stylus pen; the control circuit is configured to drive the drive assembly to move, thereby driving the pen holder assembly to move.

[0012] The testing device for the stylus pen, wherein the driving assembly includes a guide rail;

[0013] The pen holder assembly includes a supporting frame, a fixing frame and an elastic member;

[0014] The support frame is fixedly connected to the guide rail, the fixing frame and the guide rail are configured to slide relative to each other, and the fixing frame is connected to the support frame through the elastic member; the fixing frame is used to place the stylus; and the driving assembly is connected to the support frame.

[0015] The testing device for the stylus pen, wherein the fixing frame is sleeved on the guide rail;

[0016] The support frame includes a first support frame and a second support frame arranged opposite to each other, the guide rail has a first end and a second end arranged opposite to each other, the first end is fixed to the first support frame, and the second end is fixed to the second support frame;

[0017] The elastic member includes a first spring and a second spring; the fixing frame has a third end and a fourth end opposite to each other, the third end of the fixing frame is connected to the first support frame through the first spring, and the fourth end of the fixing frame is connected to the second support frame through the second spring.

[0018] The stylus testing device, wherein the measurement and control module further comprises a test platform, the pressure sensor is disposed on the test platform, and the sensing electrode is disposed on a side of the pressure sensor facing away from the test platform;

[0019] The control circuit is configured to drive the motion execution module to move, so as to drive the tip of the stylus pen to approach or move away from the test platform, so that the tip of the stylus pen contacts or leaves the sensing electrode.

[0020] The stylus pen testing device, wherein the control circuit includes:

[0021] a sensing chip, connected to the sensing electrode, and configured to obtain the sensing signal;

[0022] a pressure sensing chip, connected to the pressure sensor, for acquiring the pressure signal; and

[0023] A driving chip is used to drive the motion execution module to move.

[0024] Optionally, the control circuit further includes a processor, and the processor is connected to the sensing chip, the pressure sensing chip and the driving chip;

[0025] The sensing chip is configured to send the sensing signal directly to the processor, and the processor is configured to demodulate the sensing signal to obtain the pressure sensitivity level of the stylus; or

[0026] The sensing chip is configured to demodulate the sensing signal to obtain the pressure sensitivity level of the stylus, and the processor is configured to obtain the pressure sensitivity level.

[0027] The sensing chip is configured to directly send the sensing signal to the processor, and the processor is configured to capture a pressure sensitivity level corresponding to the sensing signal from the stylus based on the sensing signal.

[0028] In a second aspect, the present application proposes a method for testing a stylus pressure curve, which is applied to the stylus testing device described above. The method for testing a stylus pressure curve includes:

[0029] Controlling the motion execution module to drive the stylus pen to approach the pressure sensor;

[0030] acquiring a sensing signal from the sensing electrode and a pressure signal from the pressure sensor;

[0031] When the sensing signal triggers a change condition, the pressure signal and pressure level f corresponding to the sensing signal are obtained. i , and obtain the pressure value p based on the pressure signal corresponding to the sensing signal i , get the measurement point (f i , p i ); wherein, i is the number of changes of the sensing signal;

[0032] until a total of N-1 measurement points are obtained, controlling the motion execution module to stop; wherein N is the pressure sensitivity level of the stylus, and i≤N-1;

[0033] The pressure curve is obtained based on the N-1 measurement points.

[0034] The method for testing the pressure curve of a stylus pen, wherein the step of controlling the motion execution module to bring the stylus pen closer to the pressure sensor, includes:

[0035] The motion execution module is controlled to move the stylus at a uniform speed to apply pressure to the pressure sensor.

[0036] The method for testing the pressure curve of a stylus pen, wherein the step of controlling the motion execution module to bring the stylus pen closer to the pressure sensor, includes:

[0037] controlling the motion execution module to intermittently drive the stylus to move so as to apply pressure to the pressure sensor;

[0038] The acquiring the sensing signal of the sensing electrode and the pressure signal of the pressure sensor includes:

[0039] After controlling the motion execution module to intermittently drive the stylus to move each time, acquiring the sensing signal of the sensing electrode and the pressure signal of the pressure sensor multiple times;

[0040] Filtering the sensing signals obtained multiple times to obtain filtered sensing signals;

[0041] When the sensing signal triggers a change condition, the pressure signal and pressure level f corresponding to the sensing signal are obtained. i , and obtain the pressure value p based on the pressure signal corresponding to the sensing signal i , get the measurement point (f i , p i ); wherein, i is the number of changes of the sensing signal including:

[0042] When the filtered sensing signal triggers a change condition, the filtered pressure signal and pressure level f corresponding to the filtered sensing signal are obtained. i , and obtain the pressure value p based on the filtered pressure signal corresponding to the filtered sensing signal i , get the measurement point (f i , p i ).

[0043] In a third aspect, the present application also proposes a method for testing the Hover value of a stylus pen, which is applied to the stylus pen testing device as described above;

[0044] The Hover value testing method includes:

[0045] Controlling the motion execution module to drive the stylus pen to approach the pressure sensor;

[0046] If it is detected that the sensing electrode senses a sensing signal emitted by the tip of the stylus, first position information of the stylus is acquired;

[0047] A HOVER value of the stylus is determined based on the first position information.

[0048] The method for testing the Hover value of a stylus pen, wherein the motion execution module is configured to perform intermittent motion and drive the stylus pen toward or away from the pressure sensor according to a preset step length;

[0049] Before the motion execution module is controlled to drive the stylus pen close to the pressure sensor, the method further includes:

[0050] Controlling the motion execution module to drive the stylus to move closer to the pressure sensor;

[0051] When it is detected that the pressure sensor senses the pressure signal applied by the tip of the stylus pen for the first time, controlling the motion execution module to drive the stylus pen away from the pressure sensor;

[0052] When it is detected that the sensing signal sensed by the sensing electrode corresponds to the pressure sensitivity level 0, obtaining second position information of the pressure pen, and continuing to control the motion execution module to drive the stylus away from the pressure sensor;

[0053] acquiring third position information of the pressure pen when it is detected that the sensing electrode does not sense the sensing signal emitted by the pen tip of the stylus;

[0054] The step of determining the HOVER value of the stylus based on the first position information includes:

[0055] A HOVER value of the stylus is determined based on the first position information, the second position information, and the third position information.

[0056] The method for testing the Hover value of the stylus pen, wherein the first number of rotations of the stepping motor when the stylus pen moves from the first position information to the second position information is obtained;

[0057] determining a tip height of the stylus pen based on the first number of rotations and the lead of the screw;

[0058] acquiring a second number of rotations of the motion execution module when the stylus moves from the second position information to the third position information;

[0059] determining a movement amount of the stylus tip based on the second number of rotations and the lead of the screw;

[0060] A Hover value of the stylus is obtained based on the pen tip height and the pen tip downward displacement.

[0061] Beneficial effects of this application

[0062] The present application has the following beneficial effects: when a stylus needs to be tested, the stylus is connected to a motion execution module; the motion execution module is then driven by a control circuit to move, thereby bringing the stylus tip close to a pressure sensor and applying pressure to the pressure sensor, causing the pressure sensor to generate a pressure signal; a sensing electrode is disposed adjacent to the pressure sensor, and when the stylus tip approaches the pressure sensor, the sensing electrode can sense the sensing signal emitted by the stylus tip; the control circuit obtains the pressure signal and the sensing signal, thereby facilitating analysis of stylus parameters based on the pressure signal and the sensing signal; compared to the prior art, the present application embodiment drives the motion execution module through a control circuit to move, bringing the stylus tip close to the pressure sensor, and applying pressure to the pressure sensor; when the stylus approaches the pressure sensor, the sensing electrode senses the sensing signal emitted by the stylus tip, and the control circuit obtains the pressure sensor and the sensing signal, thereby improving the degree of automated testing of the stylus, thereby facilitating improved testing efficiency and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] FIG1 is a schematic diagram of the structure of a test device proposed in an embodiment of the present application;

[0064] FIG2 is a schematic structural diagram of a pen holder assembly according to an embodiment of the present application;

[0065] FIG3 is a schematic diagram of the connection structure of the control circuit, the pressure sensor, the sensing electrode, and the driving component according to an embodiment of the present application;

[0066] FIG4 is a schematic diagram of a process of testing a pressure curve of a stylus using the testing device according to an embodiment of the present application;

[0067] FIG5 is a schematic diagram of a detailed flow chart of steps S200, S300 and S400 in FIG4;

[0068] FIG6 is a schematic diagram of a process of testing the Hover value of a stylus using the testing device according to an embodiment of the present application;

[0069] FIG7 is another schematic diagram of a process for testing the Hover value of a stylus using the testing device according to an embodiment of the present application;

[0070] FIG8 is a schematic diagram of a process of measuring a HOVER value using a test device according to an embodiment of the present application;

[0071] FIG9 is a schematic diagram of a specific flow chart of step S10100 in FIG7 .

[0072] Description of reference numerals:

[0073] 100, motion execution module; 110, pen holder assembly; 111, fixing frame; 112, guide rail; 113, elastic member; 114, support frame; 1131, first spring; 1132, second spring; 1141, first support frame; 1142, second support frame; 120, drive assembly;

[0074] 200, measurement and control module; 210, sensing electrode; 220, pressure sensor; 230, control circuit; 231, sensing chip; 232, pressure sensing chip; 233, driver chip; 234, processor;

[0075] 300. Stylus. Modes for Carrying Out the Invention

[0076] In the description of this application, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0077] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0078] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used solely for descriptive distinction and have no special meaning.

[0079] The stylus is a commonly used tool in the field of intelligent office. The stylus has an integrated pressure sensor device. Based on the interaction between the stylus and the screen, the pressure sensor device can obtain a pressure value; this pressure value can be used to render the pen tip, thickness, etc. The pressure value is reported in stages, with each stage corresponding to a pressure value; this stage is called a pressure sensitivity level. The total number of pressure sensitivity levels is N. During the application process, a communication connection is established between the stylus and the screen. When the stylus is at a certain distance from the screen and the pressure sensor device collects the pressure signal, the screen can detect the sensing signal; moreover, when the pressure value of the pressure sensor device is adjusted from the value corresponding to one pressure sensitivity level to the value corresponding to another pressure sensitivity level, the sensing signal output by the stylus will change.

[0080] Styluses have key parameters that need to be measured, such as the pressure curve and hover value. These parameters require measuring the pressure value and the sensing signal between the stylus and the screen. However, these measurements often rely on manual loading, identification, and distance measurement, which suffers from a low degree of automation.

[0081] For example, the pressure applied by a stylus is graded. For example, a stylus may have 2048, 4096, or 8192 levels of pressure sensitivity. Each level of pressure sensitivity corresponds to a specific amount of actual pressure. Therefore, there is a corresponding relationship between the pressure sensitivity level and the actual pressure, known as a pressure curve. Existing techniques measure the pressure curve by adjusting a balance to offset the stylus pressure, then gradually adding weights while simultaneously detecting changes in the sensing signal reported by the stylus. This method has a low degree of automation.

[0082] For another example, the screen can just detect the sensing signal generated by the stylus, and the distance between the stylus and the screen is the Hover value (hover value). When there is a Hover value between the stylus and the screen, the stylus will not render a track on the screen, but the screen can recognize the stylus. This parameter is also a key parameter of the stylus. In some application scenarios, the stylus and the screen can make some interactions (for example, when the screen detects the stylus, the APP icon that the pen tip is close to will automatically become larger). However, in the prior art, for the test of the Hover value, a ruler is usually used to measure the distance from the pen tip to the screen when the screen can recognize it. This method has a low degree of automation, and the subjective error of this method is large and the test accuracy is not high.

[0083] To this end, an embodiment of the present application provides a testing device for testing a stylus pen 300 to improve the degree of automation of the testing of the stylus pen 300. Referring to FIG1 , the testing device includes:

[0084] A motion execution module 100 , the motion execution module 100 being connected to the stylus 300 ;

[0085] The measurement and control module 200 includes a sensing electrode 210, a pressure sensor 220, and a control circuit 230. The sensing electrode 210 is used to sense a sensing signal emitted by the tip of the stylus 300. The pressure sensor 220 is used to sense the pressure applied by the tip of the stylus 300 and generate a pressure signal based on the pressure. The control circuit 230 is electrically connected to the sensing electrode 210 and the pressure sensor 220, respectively, to obtain the sensing signal and the pressure signal.

[0086] The control circuit 230 is electrically connected to the motion execution module 100. The control circuit 230 is configured to drive the motion execution module 100 to bring the stylus 300 close to the pressure sensor 220, and to enable the tip of the stylus to apply pressure to the pressure sensor 220. The sensing electrode 210 and the pressure sensor 220 are arranged adjacent to each other, so that when the tip of the stylus 300 approaches the pressure sensor 220, the sensing electrode 210 can sense the sensing signal emitted by the tip of the stylus 300.

[0087] In the technical solution of the embodiment of the present application, when the stylus 300 needs to be tested, the stylus 300 is connected to the motion execution module 100; then, the motion execution module 100 is driven to move by the control circuit 230, so as to drive the tip of the stylus 300 to approach the pressure sensor 220 and apply pressure to the pressure sensor 220, so that the pressure sensor 220 generates a pressure signal; the sensing electrode 210 is arranged adjacent to the pressure sensor 220. When the tip of the stylus 300 approaches the pressure sensor 220, the sensing electrode 210 can sense the sensing signal emitted by the tip of the stylus 300. The control circuit 230 obtains the pressure signal and the sensing signal to analyze the parameters of the stylus 300 based on the pressure signal and the sensing signal. Compared with the prior art, in the embodiment of the present application, the control circuit 230 drives the motion execution module 100 to move, so that the stylus 300 approaches the pressure sensor 220 and applies pressure to the pressure sensor 220. When the stylus 300 approaches the pressure sensor 220, the sensing electrode 210 senses the sensing signal emitted by the stylus 300, and the control circuit 230 obtains the pressure sensor 220 and the sensing signal. This improves the degree of automated testing of the stylus 300 and helps improve the testing efficiency and accuracy of the stylus 300.

[0088] It is easy to understand that the control circuit 230 is also configured to control the motion execution module 100 to drive the stylus 300 away from the pressure sensor 220. For example, after the test is completed, the motion execution module 100 can be controlled to drive the stylus 300 away from the pressure sensor 220 to test the next stylus 300.

[0089] In some test scenarios, the test device may be used to test the pressure curve of the stylus 300 ; in other test scenarios, the test device may be used to test the Hover value of the stylus 300 .

[0090] In an embodiment, the control circuit 230 may include a processor, such as an MCU, a CPU, etc.

[0091] In some embodiments, the sensing electrodes 210 and the pressure sensor 220 can be directly connected to the control circuit 230. The control circuit 230 processes the acquired sensing signals and pressure signals. For example, according to the stylus pen 300 protocol, the control circuit 230 decodes and filters the acquired sensing signals and processes the acquired pressure signals to obtain a pressure value.

[0092] In some other embodiments, as shown in FIG3 , the control circuit 230 includes: a sensing chip 231 connected to the sensing electrode 210 for acquiring the sensing signal; a pressure sensing chip 232 connected to the pressure sensor 220 for acquiring the pressure signal; and a driving chip 233 for driving the motion execution module 100 to move.

[0093] The sensing electrode 210 is electrically connected to the processor 234 via the sensing chip 231 , the pressure sensor 220 is electrically connected to the processor 234 via the pressure sensing chip 232 , and the driving chip 233 is electrically connected to the processor 234 .

[0094] The sensing chip 231 is configured to send the sensing signal directly to the processor 234, and the processor 234 is configured to demodulate the sensing signal to obtain the pressure sensitivity level of the stylus 300. The processor 234 supports the stylus protocol and demodulates the sensing signal to obtain the pressure sensitivity level of the stylus. Or

[0095] The sensing chip 231 is configured to demodulate the sensing signal to obtain the pressure sensitivity level of the stylus 300, and the processor 234 is configured to obtain the pressure sensitivity level. The sensing chip 231 supports the stylus protocol and demodulates the sensing signal to obtain the pressure sensitivity level of the stylus. The sensing chip 231 supports decoding, filtering, and other processing on the acquired sensing signal, and then transmits the processing results to the processor 234 via the sensing chip 231's I2C or other interface.

[0096] The sensing chip 231 is configured to send the sensing signal directly to the processor 234, and the processor 234 is configured to obtain the pressure sensitivity level corresponding to the sensing signal from the stylus 300 based on the sensing signal. That is, after the processor 234 obtains the sensing signal, it obtains the pressure sensitivity level from the stylus 300.

[0097] As an alternative implementation of the above embodiment, in combination with FIG2 and FIG3 , the motion execution module 100 includes:

[0098] a driving component 120 , wherein the driving component 120 is electrically connected to the control circuit 230 ;

[0099] The pen holder assembly 110 is connected to the drive assembly 120, and the pen holder assembly 110 is used to place the stylus 300; the control circuit 230 is configured to drive the drive assembly 120 to move to drive the pen holder assembly 110 to move, so that the tip of the stylus 300 approaches the pressure sensor 220 and can apply pressure to the pressure sensor 220.

[0100] When the stylus 300 needs to be tested, the control circuit 230 controls the driving assembly 120 to drive the pen holder assembly 110 to move, so as to drive the stylus 300 to move toward the pressure sensor 220 to apply pressure to the pressure sensor 220, so that the pressure sensor 220 generates a pressure signal.

[0101] In some embodiments, the drive assembly 120 can be configured to continuously drive the stylus 300, for example, by including a reduction motor. The motion execution module 100 can be configured to intermittently drive the stylus 300, for example, by including a stepper motor. When testing the stylus 300, the control circuit 230 activates the reduction motor or stepper motor.

[0102] In some embodiments, the drive assembly 120 includes a linear actuator; the linear actuator is used to connect to the stylus 300 so that the stylus 300 moves along a predetermined linear trajectory. For example, the linear actuator may be a rack and pinion, and the pen holder assembly 110 may be connected to the rack. A reduction motor or a stepper motor drives the gear to rotate, which in turn drives the rack to cause the pen holder assembly 110 to move linearly. For another example, the linear actuator may be a lead screw and nut, and the pen holder assembly 110 is connected to the nut. The reduction motor or stepper motor drives the lead screw to rotate, which in turn drives the nut to cause the pen holder assembly 110 to move linearly.

[0103] In some other embodiments, the driving assembly 120 may also be an electric push rod, a hydraulic push rod, or a pneumatic push rod, etc. The pen holder assembly 110 is connected to a push rod of the electric push rod, the hydraulic push rod, or the pneumatic push rod.

[0104] In an embodiment, the processor 234 is electrically connected to the driving assembly 120 through the driving chip 233. For example, the processor 234 is electrically connected to the reduction motor through the driving chip 233, and is electrically connected to the stepping motor through the driving chip 233.

[0105] As an alternative embodiment to the above embodiment, as shown in FIG2 , the drive assembly includes a guide rail 121. The pen holder assembly 110 includes a support frame 114, a fixing frame 111, and an elastic member 113. The support frame 114 is fixedly connected to the guide rail 121. The fixing frame 111 and the guide rail 121 are configured to slide relative to each other. The fixing frame 111 is connected to the support frame 114 via the elastic member 113. The fixing frame 111 is used to fix the stylus 300. The drive assembly 120 is connected to the support frame 114.

[0106] In this embodiment, before the stylus 300 contacts the pressure sensor 220 or the touch electrode, the drive assembly 120 drives the support frame 114 to move, and the entire pen holder assembly 110 moves together. At this time, the fixed frame 111 remains relatively different from other structures on the pen holder assembly 110. When the stylus 300 contacts the pressure sensor 220 or the touch electrode (for example, the touch electrode is disposed above the pressure sensor 220), the fixed frame 111 and the guide rail 121 are relatively slidably connected. Since the position of the stylus 300 and the pressure sensor 220 or the touch motor remains unchanged, the fixed frame 111 connected to the stylus 300 slides relative to the guide rail 112, causing the elastic member 113 to deform, and the tip of the stylus 300 applies pressure to the pressure sensor 220.

[0107] In an embodiment, when the driving assembly 120 further drives the support frame 114 to move, the fixing frame 111 and the guide rail 121 slide relative to each other, so that the deformation of the elastic member 113 changes, so that the pressure applied by the stylus 300 to the pressure sensor 220 can be changed, so as to simulate the application of different pressures to the stylus 300.

[0108] As an optional implementation of the above embodiment, the fixing frame 111 is sleeved on the guide rail 121. The support frame 114 includes a first support frame 1141 and a second support frame 1142 arranged opposite to each other. The guide rail 121 has a first end and a second end arranged opposite to each other, the first end is fixed to the first support frame 1141, and the second end is fixed to the second support frame 1142. In an embodiment, the first end and the second end of the guide rail 121 can be welded to the first support frame and the second support frame, or the first end and the second end of the guide rail can be fixed to the first support frame and the second support frame respectively by screws, or the first end and the second end of the guide rail can be fixed to the first support frame and the second support frame respectively by riveting.

[0109] The elastic member 113 includes a first spring 1131 and a second spring 1132. The fixing frame 111 has opposing third and fourth ends. The third end is connected to the first support frame 1141 via the first spring 1131, and the fourth end is connected to the second support frame 1142 via the second spring 1132. In an embodiment, the second spring 1132 can balance the gravity of the fixing frame 111 and the stylus 300 to improve test accuracy.

[0110] As shown in Figure 2, the fixed frame 111 may include a fixed shaft and a linear bearing. The linear bearing is mounted on the guide rail 112, and the fixed shaft is fixedly connected to the linear bearing. The fixed shaft is used to secure the stylus 300. A first spring 1131 is connected to one end of the linear bearing and the first support frame 1141, and a second spring 1132 is connected to the other end of the linear bearing and the second support frame 1142. Generally speaking, the direction of motion of the motion execution module 100 is the direction of gravity. The second spring 1132 is located on the lower side of the linear bearing to balance the gravity of the fixed frame 111 and the stylus 300.

[0111] In some embodiments, there may be two guide rails 112 and two linear bearings. The two linear bearings are respectively mounted on the two guide rails 112. The fixing frame 111 is connected between the two linear bearings. The two linear bearings are symmetrically arranged about the fixing frame 111.

[0112] As an alternative embodiment to the above embodiment, the measurement and control module 200 further includes a test platform, the pressure sensor 220 is disposed on the test platform, and the sensing electrode 210 is disposed on a side of the pressure sensor 220 facing away from the test platform. The control circuit 230 is configured to drive the motion execution module 100 to move the stylus 300 toward or away from the test platform, with the tip of the stylus 300 contacting the sensing electrode 210 when approaching the test platform. During testing, the control circuit 230 is configured to move toward and away from the test platform. The sensing electrode 210 is disposed above the pressure sensor 220. When the tip of the stylus 300 approaches the pressure sensor 220, the sensing electrode 210 can detect a sensing signal emitted by the tip of the stylus 300. When the tip of the stylus 300 contacts the sensing electrode 210, the sensing electrode 210 transmits pressure to the pressure sensor 220, which then generates a pressure signal based on the pressure.

[0113] In some other optional embodiments, the sensing electrode 210 may be disposed around the pressure sensor 220 , and may sense a sensing signal emitted by the stylus 300 when the stylus 300 approaches the pressure sensor 220 .

[0114] According to the test device provided in the above embodiment, a method for testing a stylus pressure curve is proposed. Referring to FIG4 , the method for testing a stylus pressure curve includes:

[0115] S100, controlling the motion execution module 100 to drive the stylus 300 to approach the pressure sensor 220;

[0116] S200, acquiring a sensing signal from the sensing electrode 210 and a pressure signal from the pressure sensor 220;

[0117] S300, detecting whether the sensing signal triggers a change condition;

[0118] S400, if yes, obtain the pressure signal and pressure level fi corresponding to the sensing signal, and obtain the pressure value pi based on the pressure signal corresponding to the sensing signal, and obtain the measurement point (fi, pi); where i is the number of changes of the sensing signal;

[0119] S500 , until a total of N-1 measurement points are obtained, controlling the motion execution module 100 to stop; wherein N is the pressure sensitivity level of the stylus 300 , and i≤N-1;

[0120] S600: Obtain the pressure curve based on the N-1 measurement points.

[0121] When the pressure curve of the stylus 300 needs to be tested, the motion execution module 100 is controlled to move the stylus 300 close to the pressure sensor 220; the sensing signal from the sensing electrode 210 and the pressure signal from the pressure sensor 220 are acquired; and the sensing signal is detected to determine whether a change condition has been triggered. When the sensing signal triggers a change condition, the pressure sensitivity level of the stylus 300 changes. At this time, the pressure signal corresponding to the sensing signal is acquired to obtain a pressure value pi and a pressure level fi. (i) Where i is the number of changes in the sensing signal, this process continues until a measurement point (fi, pi) is obtained. The motion execution module 100 is controlled to stop until a total of N-1 measurement points have been obtained. (N) Where i is the pressure sensitivity level of the stylus 300, and i ≤ N-1. A pressure curve is then obtained based on the obtained N-1 measurement points. This method automatically measures the pressure curve of the stylus 300, improving the automation level of pressure curve measurement.

[0122] It should be noted that the sensing signal is a signal continuously output by the stylus 300. Before the stylus 300 generates pressure on the pressure sensor 220, the sensing signal has already begun to be continuously output by the stylus 300. After the tip of the stylus 300 generates pressure on the pressure sensor 220, the pressure exerted by the tip of the stylus 300 on the pressure sensor 220 continuously increases when the motion execution module 100 is driven. When the generated pressure reaches a first constant value p1, the sensing signal generated by the stylus 300 changes for the first time. The control circuit 230 detects that the sensing signal triggers a change condition. At this time, the pressure level is f1, and the control circuit 230 records the measurement point (f1, p1) of the first pressure level. During the continuous loading process, the pressure generated by the stylus 300 reaches the second constant value p2, the third constant value p3, ... the i-th constant value pi, ... the N-th constant value pN. Correspondingly, the sensing signal emitted by the tip of the stylus 300 changes for the second time, the third time, ... the i-th time, ... the N-1-th time. The control circuit 230 then records the measurement point (f2, p2) for the second pressure sensitivity level, the measurement point (f3, p3) for the third pressure sensitivity level, ... the measurement point (f1, pi) for the i-th pressure sensitivity level, ... the measurement point (fN-1, pN-1) for the N-th pressure sensitivity level. In other words, steps S100 and S200 are continuously performed, and steps S300 and S400 are performed synchronously with steps S100 and S200 until N-1 measurement points are measured, at which point the measurement stops.

[0123] In this embodiment, in step S300, the sensing signal is detected to determine whether it triggers a change condition. If not, the acquired sensing signal is continuously detected to determine whether it triggers a change condition until the sensing signal triggers a change condition. If the sensing signal triggers a change condition, a pressure signal and a pressure level fi corresponding to the sensing signal are acquired, and a pressure value pi is obtained based on the pressure signal corresponding to the sensing signal, thereby obtaining a measurement point (fi, pi); where i is the number of changes in the sensing signal.

[0124] According to the order of pressure sensitivity levels in the art, there are N levels of pressure sensitivity, numbered 0 to N-1. That is, f0 corresponding to the 0th pressure sensitivity level is defined as 0. Similarly, f1 corresponding to the 1st pressure sensitivity level is defined as 1, f2 corresponding to the 2nd pressure sensitivity level is defined as 2, ..., fi corresponding to the i-th pressure sensitivity level is defined as i, ..., fN-1 corresponding to the N-1th pressure sensitivity level is defined as N-1. That is, the i-th measurement point can be represented as (i, pi). In this embodiment, when the stylus 300 applies pressure to the pressure sensor 220, the sensing signal of the stylus 300 changes for the first time after the pressure value reaches the first constant value p1. If the pressure value has not yet reached the first constant value p1 corresponding to the first pressure sensitivity level, the pressure sensitivity level at this time is recorded as f0 (i.e., 0), and the pressure value can be recorded as 0.

[0125] As an alternative to the above embodiment, the motion execution module 100 is controlled to move the stylus 300 at a constant speed to apply pressure to the pressure sensor 220. For example, the motion execution module 100 includes a reduction motor, a ball screw, and a nut. The reduction motor rotates at a constant speed. The stylus 300 is uniformly and continuously loaded linearly to generate a gradual pressure value, which helps improve the accuracy of the pressure curve.

[0126] As an optional implementation of the above embodiment, the motion execution module 100 is controlled to intermittently drive the stylus 300 to move so as to apply pressure to the pressure sensor 220. For example, the motion execution module 100 includes a stepper motor, a ball screw and a nut. The stepper motor rotates according to a preset step length, for example, the stepper motor rotates 1 / 8 circle, 1 / 16 circle, etc. each time. Before the stylus 300 applies pressure to the pressure sensor 220, the stylus 300 moves a certain distance toward the pressure sensor 220 each time the stepper motor rotates a preset step length; after the stylus 300 applies pressure to the pressure sensor 220, the pressure applied by the stylus 300 to the pressure sensor 220 gradually increases each time the stepper motor rotates a preset step length. As shown in Figure 5, the acquisition of the sensing signal of the sensing electrode 210 and the pressure signal of the pressure sensor 220 includes:

[0127] S210, acquiring sensing signals from the sensing electrodes 210 and pressure signals from the pressure sensor 220 multiple times after each time controlling the motion execution module 100 to intermittently drive the stylus 300 to move;

[0128] S220, filtering the sensing signals obtained multiple times to obtain filtered sensing signals;

[0129] Detecting whether the sensing signal triggers a change condition includes:

[0130] S310, detecting whether the filtered sensing signal triggers a change condition;

[0131] If so, the pressure signal and pressure level fi corresponding to the sensing signal are obtained, and the pressure value pi is obtained based on the pressure signal corresponding to the sensing signal. Obtaining the measurement point (fi, pi) includes:

[0132] S410: If yes, obtain a filtered pressure signal and a pressure level fi corresponding to the filtered sensing signal, obtain a pressure value pi based on the filtered pressure signal corresponding to the filtered sensing signal, and obtain a measurement point (fi, pi).

[0133] In this embodiment, after each rotation of the stepper motor, due to the nonlinear loading, the sensing signal of the sensing electrode 210 and the pressure signal of the pressure sensor 220 are acquired multiple times. After filtering the sensing signal, it is determined whether the sensing signal triggers a change condition. That is, after each rotation of the preset step length, it is necessary to determine whether the pressure sensitivity level changes once. If so, the multiple acquired pressure signals are filtered, and the corresponding pressure value is calculated based on the filtered pressure signal to obtain the measurement point (fi, pi). This cycle is executed until N measurement points are calculated.

[0134] In an embodiment, the filtering process includes performing weighted averaging on the sensing signals and pressure signals acquired multiple times, respectively, to improve the accuracy of the pressure curve.

[0135] Based on the test equipment provided in the above embodiment, the present application also provides a method for testing the Hover value of a stylus pen. As shown in FIG6 , the method for testing the Hover value of a stylus pen includes:

[0136] S7000, controlling the motion execution module 100 to drive the stylus 300 to approach the pressure sensor 220;

[0137] S8000, continuously detecting whether the sensing electrode 210 senses a sensing signal emitted by the tip of the stylus pen 300;

[0138] S9000: If yes, obtain the first position information of the stylus 300;

[0139] S10000: Determine a Hover value of the stylus 300 based on the first position information.

[0140] In this embodiment, when the Hover value of the stylus 300 needs to be tested, steps S7000 and S8000 are executed until the sensing electrode 210 detects the sensing signal emitted by the tip of the stylus 300. At this point, first position information of the stylus 300 is obtained, and the Hover value of the stylus 300 is determined based on the first position information. In this embodiment, the first position information of the stylus 300 is accurately measured when the sensing electrode 210 detects the sensing signal emitted by the stylus 300, thereby accurately determining the Hover value of the stylus 300.

[0141] For example, the Hover value of the stylus 300 may be determined based on the first position information by using a laser rangefinder, an infrared rangefinder, or the like.

[0142] In order to improve the accuracy of the Hover value, in some embodiments, the Hover value can be tested by an intermittent motion execution module 100. The intermittent motion execution module 100 is configured to drive the stylus 300 away from or close to the pressure sensor 220 according to a preset step length. As shown in FIG7 , the Hover value test method includes:

[0143] S1000, controlling the motion execution module 100 to drive the stylus 300 to move closer to the pressure sensor 220;

[0144] S2000, continuously detecting whether the pressure sensor 220 senses a pressure signal applied by the tip of the stylus pen 300;

[0145] S3000: If yes, control the motion execution module 100 to drive the stylus 300 away from the pressure sensor 220;

[0146] S4000, continuously detecting whether the sensing signal sensed by the sensing electrode 210 corresponds to the pressure sensitivity level of level 0;

[0147] S5000: If yes, obtain the second position information of the pressure pen, and continue to control the motion execution module 100 to drive the stylus 300 away from the pressure sensor 220;

[0148] S6000, continuously detecting whether the sensing electrode 210 senses a sensing signal emitted by the tip of the stylus pen 300;

[0149] S7100 , if not, obtain third position information of the pressure pen, and control the motion execution module 100 to drive the stylus 300 to approach the pressure sensor 220 ;

[0150] S8000, continuously detecting whether the sensing electrode 210 senses a sensing signal emitted by the tip of the stylus pen 300;

[0151] S9000: If yes, control the motion execution module 100 to stop driving the stylus 300 to move, and obtain first position information of the pressure pen;

[0152] S10100 : Obtain a Hover value of the stylus 300 based on the first position information, the second position information, and the third position information.

[0153] When starting to measure the Hover value, the control circuit 230 controls the intermittent motion execution module 100 to drive the stylus 300 close to the pressure sensor 220, and continuously detects whether the pressure sensor 220 generates a pressure signal. If a pressure signal is generated, it means that the stylus 300 has contacted the pressure sensor 220 or the sensing electrode 210 (simulating that the stylus 300 has touched the screen); then, the control motion execution module 100 drives the stylus 300 away from the pressure sensor 220, and continuously detects whether the sensing signal sensed by the sensing electrode 210 corresponds to the 0th level of pressure sensitivity; if so, it means that the distance between the stylus 300 and the pressure sensor 220 or the sensing electrode 210 is 0, at this time, the second position information of the pressure pen is obtained, which can be used as a reference. The motion execution module 100 is controlled to drive the stylus 300 further away from the pressure sensor 220 and continuously detect whether the sensing electrode 210 senses the sensing signal emitted by the stylus 300. If the sensing electrode 210 does not sense the sensing signal, the third position information of the pressure pen is obtained. The motion execution module 100 is then controlled to drive the stylus 300 further towards the pressure sensor 220 and continuously detect whether the sensing electrode 210 senses the sensing signal emitted by the stylus 300. If the sensing electrode 210 just senses the sensing signal, the third position of the pressure pen is obtained and driving the motion execution module 100 is stopped. The third position of the pressure pen means that the sensing signal of the pressure pen can just be detected by the sensing electrode 210 (the screen in actual application).

[0154] In this embodiment, the intermittent motion actuator accurately defines the contact interface between the stylus 300 and the pressure sensor 220 or sensing electrode 210 (at this contact interface, the stylus 300 is in contact with the pressure sensor 220 or sensing electrode 210, but no pressure is generated), thereby simulating the contact interface between the stylus 300 and the screen, which serves as a reference interface for the Hover value. Furthermore, the intermittent motion actuator accurately defines the position where the sensing signal emitted by the stylus 300 is detected by the sensing electrode 210, and the Hover value is determined based on these two positions.

[0155] In an embodiment, the second position information can be determined by the first position information and the motion step length of the motion execution module 100 after determining the first position information, that is, H2 as shown in Figure 8 can be determined by the motion distance of the motion execution module 100; the third position information can be determined by the second position information and the motion distance of the motion execution module 100 after determining the second position information, that is, H3 as shown in Figure 8 can be determined by the motion step length of the motion execution module 100; the hover value H4 can be determined by H2 and H3.

[0156] 8 and 9 , at S10100, obtaining a Hover value of the stylus 300 based on the first position information, the second position information, and the third position information includes:

[0157] S10110, obtaining a first number of rotations of the stepping motor when the stylus 300 moves from the first position information to the second position information;

[0158] S10120: Determine a tip height of the stylus pen based on the first number of rotations and the lead of the screw rod.

[0159] S10130, obtaining a second number of rotations of the motion execution module when the stylus pen 300 moves from the second position information to the third position information;

[0160] S10140: Determine a movement amount of the tip of the stylus pen 300 based on the second number of rotations and the lead of the screw rod.

[0161] S10150: Obtain a Hover value of the stylus 300 based on the pen tip height and the pen tip downward displacement.

[0162] In an embodiment, the intermittent motion execution module 100 includes a stepper motor and a screw. After determining the first position information, the stepper motor rotates a total of 16 1 / 8 turns (preset step length) and detects that the sensing electrode 210 does not sense the sensing signal emitted by the stylus 300. The lead of the screw is L. If the lead of the screw corresponding to each 1 / 8 turn is 1 / 8L, then the pen tip height H2 is 2L. Subsequently, after determining the second position information, the stepper motor rotates a total of 3 1 / 8 turns and detects that the sensing electrode 210 senses the sensing signal emitted by the stylus 300. Then, the movement of the stylus tip 300 is 3 / 8L downward, and the calculated Hover value is (2-3 / 8)L(H2-H3), that is, 13 / 16L.

[0163] In the embodiment, the preset step length and the lead of the screw rod are specifically set according to actual conditions and are not limited here.

Claims

1. Stylus test equipment, where: include: A motion execution module, the motion execution module is used to connect with the stylus; A measurement and control module, the measurement and control module comprising a sensing electrode, a pressure sensor and a control circuit; The sensing electrode is used to sense the sensing signal emitted by the tip of the stylus pen, and the pressure sensor is used to sense the pressure applied by the tip of the stylus pen and generate a pressure signal based on the pressure; the control circuit is electrically connected to the sensing electrode and the pressure sensor respectively to obtain the sensing signal and the pressure signal; Among them, the control circuit is electrically connected to the motion execution module; the control circuit is configured to drive the motion execution module to bring the tip of the stylus pen close to the pressure sensor, and enable the tip of the stylus pen to apply pressure to the pressure sensor; the sensing electrode and the pressure sensor are arranged adjacent to each other to sense the sensing signal emitted by the tip of the stylus pen when the tip of the stylus pen approaches the pressure sensor.

2. The stylus pen testing device according to claim 1, wherein: The motion execution module comprises: a drive assembly, the drive assembly being electrically connected to the control circuit; A pen holder assembly is connected to the driving assembly, and the pen holder assembly is used to place a stylus pen; the control circuit is configured to drive the driving assembly to move, thereby driving the pen holder assembly to move.

3. The stylus pen testing device as claimed in claim 2, wherein: The drive assembly includes a guide rail; The pen holder assembly comprises a supporting frame, a fixing frame and an elastic member; The support frame is fixedly connected to the guide rail, the fixing frame and the guide rail are configured to slide relative to each other, and the fixing frame is connected to the support frame through the elastic member; the fixing frame is used to place the stylus; and the driving assembly is connected to the support frame.

4. The stylus pen testing device as claimed in claim 3, wherein: The fixing frame is sleeved on the guide rail; The support frame comprises a first support frame and a second support frame arranged opposite to each other, the guide rail comprises a first end and a second end arranged opposite to each other, the first end is fixed to the first support frame, and the second end is fixed to the second support frame; The elastic member includes a first spring and a second spring; the fixing frame has a third end and a fourth end opposite to each other, the third end of the fixing frame is connected to the first supporting frame through the first spring, The fourth end of the fixed frame is connected to the second support frame through the second spring.

5. The stylus pen testing device according to any one of claims 1 to 4, wherein: The measurement and control module further includes a test platform, the pressure sensor is arranged on the test platform, and the sensing electrode is arranged on a side of the pressure sensor away from the test platform; The control circuit is configured to drive the motion execution module to move, so as to drive the tip of the stylus pen to approach or move away from the test platform, so that the tip of the stylus pen contacts or leaves the sensing electrode.

6. The stylus pen testing device according to any one of claims 1 to 4, wherein: The control circuit comprises: A sensing chip, connected to the sensing electrode, and used to obtain the sensing signal; A pressure sensing chip, connected to the pressure sensor, for acquiring the pressure signal; and A driving chip is used to drive the motion execution module to move.

7. The stylus pen testing device according to claim 6, wherein: The control circuit further includes a processor, and the processor is connected to the sensing chip, the pressure sensing chip and the driving chip; The sensing chip is configured to send the sensing signal directly to the processor, and the processor is configured to demodulate the sensing signal to obtain the pressure sensitivity level of the stylus; or The sensing chip is configured to demodulate the sensing signal to obtain the pressure sensitivity level of the stylus, and the processor is configured to obtain the pressure sensitivity level; or The sensing chip is configured to send the sensing signal directly to the processor, and the processor is configured to capture a pressure level corresponding to the sensing signal from the stylus based on the sensing signal.

8. A method for testing a stylus pressure curve, wherein: Applied to the stylus pen testing device according to any one of claims 1 to 7, the method for testing the stylus pen pressure curve comprises: Control the motion execution module to drive the stylus pen to approach the pressure sensor; Acquiring a sensing signal from the sensing electrode and a pressure signal from the pressure sensor; When the sensing signal triggers a change condition, the pressure signal and pressure level f corresponding to the sensing signal are obtained. i , and obtain the pressure value p based on the pressure signal corresponding to the sensing signal i , get the measurement point (f i , p i ), wherein i is the number of changes of the sensing signal; Until a total of N-1 measurement points are obtained, the motion execution module is controlled to stop; wherein N is the pressure sensitivity level of the stylus pen, and i≤N-1; Based on the N-1 measurement points, the pressure curve is obtained.

9. The method for testing a pressure curve of a stylus pen as claimed in claim 8, wherein: The controlling the motion execution module to drive the stylus pen to approach the pressure sensor includes: The motion execution module is controlled to drive the stylus to move at a uniform speed so as to apply pressure to the pressure sensor.

10. The method for testing a pressure curve of a stylus pen as claimed in claim 8, wherein: The controlling the motion execution module to drive the stylus pen to approach the pressure sensor includes: Controlling the motion execution module to intermittently drive the stylus to move so as to apply pressure to the pressure sensor; The acquiring the sensing signal of the sensing electrode and the pressure signal of the pressure sensor includes: After controlling the motion execution module to intermittently drive the stylus to move each time, acquiring the sensing signal of the sensing electrode and the pressure signal of the pressure sensor multiple times; Filtering the sensing signals obtained multiple times to obtain filtered sensing signals; When the sensing signal triggers a change condition, the pressure signal and pressure level f corresponding to the sensing signal are obtained. i , and obtain the pressure value p based on the pressure signal corresponding to the sensing signal i , get the measurement point (f i , p i ), wherein i is the number of changes of the sensing signal, including: When the filtered sensing signal triggers a change condition, the filtered pressure signal and the pressure level f corresponding to the filtered sensing signal are obtained. i , and obtain the pressure value p based on the filtered pressure signal corresponding to the filtered sensing signal i , get the measurement point (f i , p i ).

11. Method for testing the Hover value of the stylus, where: Applicable to a stylus pen testing device as claimed in any one of claims 1 to 7; The Hover value testing method includes: Control the motion execution module to drive the stylus pen to approach the pressure sensor; If it is detected that the sensing electrode senses a sensing signal emitted by the tip of the stylus pen, first position information of the stylus pen is acquired; A Hover value of the stylus is determined based on the first position information.

12. The method for testing the Hover value of a stylus pen as claimed in claim 11, wherein: The motion execution module is configured to perform intermittent motion and drive the stylus pen closer to or away from the pressure sensor according to a preset step length; Before the control motion execution module drives the stylus pen to approach the pressure sensor, the method further includes: Control the motion execution module to drive the stylus to move closer to the pressure sensor; When it is detected that the pressure sensor senses a pressure signal applied by the tip of the stylus pen, controlling the motion execution module to drive the stylus pen away from the pressure sensor; When it is detected that the sensing signal sensed by the sensing electrode corresponds to the 0th level of pressure sensitivity, second position information of the pressure pen is acquired, and the motion execution module is continuously controlled to drive the stylus pen away from the pressure sensor; When it is detected that the sensing electrode does not sense the sensing signal emitted by the tip of the stylus pen, obtaining third position information of the pressure pen; The step of determining the HOVER value of the stylus based on the first position information comprises: A Hover value of the stylus is determined based on the first position information, the second position information, and the third position information.

13. The method for testing the Hover value of a stylus pen as claimed in claim 12, wherein: The motion execution module includes a stepping motor and a lead screw; The determining the Hover value of the stylus based on the first position information, the second position information, and the third position information includes: Acquire a first number of rotations of the stepping motor when the stylus moves from the first position information to the second position information; Determining a tip height of the stylus pen based on the first number of rotations and the lead of the screw rod; acquiring a second number of rotations of the motion execution module when the stylus moves from the second position information to the third position information; Determining a movement amount of the pen tip of the stylus pen based on the second number of rotations and the lead of the screw rod; A Hover value of the stylus is obtained based on the pen tip height and the pen tip downward displacement.

Images