Driving chip and active pen

Abstract

The utility model relates to the technical field of active pens, and discloses a driving chip and an active pen, which can simultaneously transmit a coordinate signal and a pressure sensing signal of the active pen to a screen end and reduce the pressure sensing data transmission delay of the active pen. The active pen part comprises a pen point position electrode and a pressure-sensitive electrode, the pen point position electrode and the pressure-sensitive electrode are respectively independent electrodes, and the driving chip is used for being connected with the pen point position electrode and the pressure-sensitive electrode; the driving chip comprises a plurality of pins, the plurality of pins are respectively connected with the pen point position electrode and the pressure-sensitive electrode, the pen point position electrode is driven to output position electrode signals corresponding to the pen point position, and the pressure-sensitive electrode is driven to synchronously output pressure-sensitive electrode signals.

Description

Technical Field

[0001] This application relates to the field of active pen technology, and more particularly to a driver chip and an active pen. Background Technology

[0002] Capacitive active pens are now widely used in electronic devices such as tablets and foldable phones, and users have increasingly higher demands for the writing experience. The main factors affecting the writing experience of active pens include: better handwriting accuracy, faster writing response, and more levels of pressure sensitivity.

[0003] Pressure feedback during writing with an active pen relies on detecting the force sensor signal at the pen tip, calculating pressure data, and ultimately transmitting it to the screen system of the electronic device so that the pressure changes can be displayed on the screen. If this pressure data transmission is not timely, it will lead to slow ink flow, ink leakage when lifting the pen, a hook when lifting the pen, and slow writing response, seriously affecting the user's writing experience.

[0004] Therefore, how to process the pressure-sensitive data of the active pen has become an urgent problem to be solved. Utility Model Content

[0005] This application provides a driver chip and an active pen that can output pressure-sensitive data from the active pen in a timely manner, thus solving the problem of transmission delay in the pressure-sensitive data of the active pen.

[0006] Based on the above technical issues, the following solutions are provided:

[0007] In a first aspect, an active pen is used, the active pen including a pen tip position electrode and a pressure-sensitive electrode, the pen tip position electrode and the pressure-sensitive electrode being independent electrodes, and the driving chip being used to electrically connect to the pen tip position electrode and the pressure-sensitive electrode.

[0008] The driving chip includes multiple pins, which are respectively connected to the pen tip position electrode and the pressure-sensitive electrode, and drive the pen tip position electrode to output a position electrode signal corresponding to the pen tip position and drive the pressure-sensitive electrode to output a pressure-sensitive electrode signal synchronously.

[0009] Furthermore, the position electrode signal includes a first electrode signal and a second electrode signal; the pen tip position electrode includes independent first and second position electrodes, and the plurality of pins are respectively connected to the first and second position electrodes, so that the first position electrode outputs the first electrode signal, and the second position electrode synchronously outputs the second electrode signal. The first electrode signal is used to determine the coordinate information of the pen tip position, and the first electrode signal and the second electrode signal are used together to determine the direction information of the pen tip position.

[0010] Furthermore, the position electrode signal and the pressure-sensitive electrode signal have different signal transmission frequencies.

[0011] Furthermore, the driving chip is electrically connected to the force sensor in the active pen, and the force sensor is used to collect the pen tip pressure signal of the active pen; wherein, the pressure-sensitive electrode signal is obtained by encoding the pressure-sensitive data corresponding to the pen tip pressure signal.

[0012] Furthermore, the position electrode signal and the pressure-sensitive electrode signal have different signal transmission frequencies; wherein, the pressure-sensitive electrode signal is obtained by phase encoding, frequency encoding or amplitude encoding of pressure-sensitive data.

[0013] Furthermore, the pressure-sensitive electrode is also driven to output other active pen signals, including active pen button signals or active pen battery signals.

[0014] Furthermore, the driving chip includes a pressure detection unit, a signal generation unit, an encoding unit, and a high-voltage coding unit;

[0015] The three output terminals of the signal generation unit are respectively connected to the three input terminals of the encoding unit, and the three output terminals of the encoding unit are respectively connected to the three input terminals of the high voltage coding unit. The first position electrode output terminal, the second position electrode output terminal, and the pressure-sensitive electrode output terminal of the high voltage coding unit are respectively connected to the first position electrode, the second position electrode, and the pressure-sensitive electrode via a switching unit.

[0016] The input terminal of the pressure detection unit is used to connect to the force sensor. The pressure detection unit converts the pen tip pressure signal collected by the force sensor. The pressure data is calculated from the pen tip pressure signal converted by the pressure detection unit.

[0017] The encoding unit encodes a first position encoding signal based on a first generated signal output by the signal generation unit, the encoding unit encodes a pressure-sensitive encoding signal based on a second generated signal output by the signal generation unit and the pressure-sensitive data, and the encoding unit encodes a second position encoding signal based on a third generated signal output by the signal generation unit. The first position encoding signal, the second position encoding signal, and the pressure-sensitive encoding signal are then encoded by the high-voltage coding unit to obtain the first electrode signal, the second electrode signal, and the pressure-sensitive electrode signal, respectively.

[0018] Furthermore, the high-voltage coding unit includes a low-voltage to high-voltage module, a first high-voltage coding module, a second high-voltage coding module, and a third high-voltage coding module;

[0019] The low-voltage to high-voltage module boosts the low-voltage power supply to a first voltage, a second voltage, and a third voltage, where the first voltage, the second voltage, and the third voltage are the high-voltage power supplies of the first high-voltage coding module, the second high-voltage coding module, and the third high-voltage coding module, respectively.

[0020] The first position coding signal is coded by the first high-voltage coding module to obtain the first electrode signal, the pressure-sensitive coding signal is coded by the second high-voltage coding module to obtain the pressure-sensitive electrode signal, and the second position coding signal is coded by the second high-voltage coding module to obtain the second electrode signal.

[0021] Secondly, an active pen is provided, the active pen including a driving chip, a pen tip position electrode and a pressure-sensitive electrode, wherein the pen tip position electrode and the pressure-sensitive electrode are independent electrodes, and the driving chip is electrically connected to the pen tip position electrode and the pressure-sensitive electrode.

[0022] The driving chip includes multiple pins, which are respectively connected to the pen tip position electrode and the pressure-sensitive electrode, and drive the pen tip position electrode to output a position electrode signal corresponding to the pen tip position and drive the pressure-sensitive electrode to output a pressure-sensitive electrode signal synchronously.

[0023] Furthermore, the position electrode signal includes a first electrode signal and a second electrode signal; the pen tip position electrode includes an independent first position electrode and a second position electrode, and the plurality of pins are respectively connected to the first position electrode and the second position electrode, so that the first position electrode outputs the first electrode signal and the second position electrode synchronously outputs the second electrode signal;

[0024] The first electrode signal is used to determine the coordinate information of the pen tip position, and the first electrode signal and the second electrode signal are used together to determine the direction information of the pen tip position.

[0025] Furthermore, the driving chip is electrically connected to the force sensor in the active pen, and the force sensor is used to collect the pen tip pressure signal of the active pen; wherein, the pressure-sensitive electrode signal is obtained by encoding the pressure-sensitive data corresponding to the pen tip pressure signal.

[0026] Furthermore, the position electrode signal and the pressure-sensitive electrode signal have different signal transmission frequencies;

[0027] Furthermore, the pressure-sensitive electrode signal is obtained by phase encoding, frequency encoding, or amplitude encoding of the pressure-sensitive data.

[0028] Furthermore, the pressure-sensitive electrode is also driven to output other active pen signals, including active pen button signals or active pen battery signals.

[0029] Furthermore, the driving chip includes a pressure detection unit, a signal generation unit, an encoding unit, and a high-voltage coding unit;

[0030] The output terminal of the signal generation unit is connected to the input terminal of the encoding unit, the output terminal of the encoding unit is connected to the input terminal of the high voltage coding unit, and the first position electrode output terminal, the second position electrode output terminal, and the pressure-sensitive electrode output terminal of the high voltage coding unit are respectively connected to the first position electrode, the second position electrode, and the pressure-sensitive electrode via a switching unit.

[0031] The input terminal of the pressure detection unit is used to connect to the force sensor. The pressure detection unit converts the pen tip pressure signal collected by the force sensor. The pressure data is calculated from the pen tip pressure signal converted by the pressure detection unit.

[0032] The encoding unit encodes a first position encoding signal based on a first generated signal output by the signal generation unit, the encoding unit encodes a pressure-sensitive encoding signal based on a second generated signal output by the signal generation unit and the pressure-sensitive data, and the encoding unit encodes a second position encoding signal based on a third generated signal output by the signal generation unit. The first position encoding signal, the second position encoding signal, and the pressure-sensitive encoding signal are then encoded by the high-voltage coding unit to obtain the first electrode signal, the second electrode signal, and the pressure-sensitive electrode signal, respectively.

[0033] Furthermore, the active pen also includes a processing unit, which is electrically connected to the pressure detection unit of the driving chip;

[0034] The pen tip pressure signal collected by the force sensor is detected and processed by the pressure detection unit and then sent to the processing unit for further processing, so as to be converted into the pressure-sensitive data by the processing unit.

[0035] Furthermore, the high-voltage coding unit includes a low-voltage to high-voltage module, a first high-voltage coding module, a second high-voltage coding module, and a third high-voltage coding module;

[0036] The low-voltage to high-voltage module boosts the low-voltage power supply to a first voltage, a second voltage, and a third voltage, where the first voltage, the second voltage, and the third voltage are the high-voltage power supplies of the first high-voltage coding module, the second high-voltage coding module, and the third high-voltage coding module, respectively.

[0037] The first position coding signal is coded by the first high-voltage coding module to obtain the first electrode signal, the pressure-sensitive coding signal is coded by the second high-voltage coding module to obtain the pressure-sensitive electrode signal, and the second position coding signal is coded by the second high-voltage coding module to obtain the second electrode signal.

[0038] In one of the aforementioned solutions, the driver chip drives the pen tip position electrode to output a position electrode signal corresponding to the pen tip position, and drives the pressure-sensitive electrode to synchronously output a pressure-sensitive electrode signal. Furthermore, the pen tip position electrode and the pressure-sensitive electrode are independent electrodes; that is, the pressure-sensitive electrode is an active pen electrode independent of the pen tip position electrode. The position electrode signal and the pressure-sensitive electrode signal are output synchronously, rather than sharing the same active pen electrode for serial transmission. This allows the active pen to synchronously transmit the position electrode signal and the pressure-sensitive electrode signal separately, and output them in a timely manner, simultaneously transmitting both position signal and pressure-sensitive data to the screen. This significantly reduces the latency in receiving pressure-sensitive data at the screen, effectively reducing or avoiding issues such as slow ink flow during writing, ink leakage when lifting the pen, pen hooking when lifting, and slow writing response, thus improving the user experience of the active pen. Attached Figure Description

[0039] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a writing diagram of the active pen and screen in this application;

[0041] Figure 2 This is a schematic diagram of the signal interaction of a screen pen system according to an embodiment of this application;

[0042] Figure 3 This is a schematic diagram of the positional relationship between the pen tip position electrode and the pressure-sensitive electrode in one embodiment of this application;

[0043] Figure 4 This is another schematic diagram showing the positional relationship between the pen tip position electrode and the pressure-sensitive electrode in one embodiment of this application;

[0044] Figure 5 This is a schematic diagram of the output when the position electrode signal and the pressure sensing electrode signal share the same electrode for transmission;

[0045] Figure 6This is a schematic diagram of a synchronous output of the first electrode signal, the second electrode signal, and the pressure-sensitive electrode signal in one embodiment of this application;

[0046] Figure 7 This is a schematic diagram showing the connection relationship between the driver chip, electrodes, and force sensor in one embodiment of this application;

[0047] Figure 8 This is a schematic diagram showing the connection relationship between the driver chip, the electrode, the force sensor, and the processing unit in one embodiment of this application;

[0048] Figure 9 This is a schematic diagram of a high-voltage marking unit in one embodiment of this application. Detailed Implementation

[0049] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0050] To fully understand this application, detailed structures and steps will be presented in the following description to illustrate the technical solutions proposed in this application. Preferred embodiments of this application are described in detail below; however, in addition to these detailed descriptions, this application may have other implementation methods.

[0051] like Figure 1 As shown, when the active pen is in use, it needs to transmit two types of pen signals—one representing the pen's position and the other representing pressure sensitivity—to the screen (Touch Panel, TP) of the electronic device. The screen then displays the pen's handwriting based on the pen's position and pressure sensitivity, thus enabling the active pen to be used on the screen, including writing and drawing. A certain number of horizontal and vertical detection electrodes are distributed on the screen. When the position electrode signal output by the pen's tip electrode acts on a specific location on the screen, the corresponding horizontal and vertical detection electrodes will generate corresponding detection signals. These signals can then be used to calculate the two-dimensional position coordinates of the active pen on the screen. The active pen also incorporates a force sensor. This force sensor detects the pressure exerted by the pen tip on the screen, allowing the active pen to sense changes in the user's writing pressure. The electronic screen can then adjust the pen thickness according to these changes in pressure, providing different writing experiences based on varying pressure sensitivity.

[0052] In this embodiment of the application, in order to solve the problems mentioned in the background art, a driver chip and an active pen containing the driver chip are provided to process the pressure-sensitive data of the active pen in a suitable manner, so that the pressure-sensitive data can be transmitted to the screen system in a timely manner. The following are descriptions of these aspects.

[0053] Please combine them together Figures 2-8 In one embodiment, this application provides a driver chip, the specific details of which are not limited. This driver chip is used in an active pen, which includes a pen tip position electrode and a pressure-sensitive electrode. The pen tip position electrode and the pressure-sensitive electrode are independent electrodes. The driver chip is used to electrically connect to the pressure-sensitive electrode and a force sensor. For example, the force sensor can be any of the following: a piezoresistive force sensor, a capacitive force sensor, an inductive force sensor, and a piezoelectric force sensor, the specific type is not limited.

[0054] The driving chip includes multiple pins, which are respectively connected to the pen tip position electrode and the pressure-sensitive electrode. The driving chip drives the pen tip position electrode to output a position electrode signal corresponding to the pen tip position and drives the pressure-sensitive electrode to output a pressure-sensitive electrode signal synchronously.

[0055] It should be understood that the pen tip pressure generated by the active pen in the embodiments of this application is the pressure output by the user through the active pen, that is, the user's writing pressure. The user can apply pressure to the screen of the electronic product through the active pen. Depending on the pressure, different strokes of the active pen can be displayed on the screen. For example, the amount of pen tip pressure is related to the thickness of the strokes displayed on the screen and whether there is ink leakage. The electronic device includes, but is not limited to, personal computers, tablet computers, or in-vehicle terminals and other electronic devices with screens, and is not specifically limited thereto.

[0056] The position electrode signal is an electrode signal used to enable the screen to resolve the position of the stylus tip. The driver chip drives the stylus tip position electrode to output the position electrode signal. As an example, a certain number of horizontal and vertical detection electrodes are distributed on the screen. When the position electrode signal output by the stylus tip position electrode acts on a certain position on the screen, the corresponding horizontal and vertical detection electrodes will generate corresponding detection signals. This allows the screen to determine the position information of the stylus on the screen based on the detection signals.

[0057] In this embodiment, a driver chip is provided. The driver chip drives the pen tip position electrode to output a position electrode signal and drives the pressure-sensitive electrode to output a pressure-sensitive electrode signal synchronously. The pen tip position electrode and the pressure-sensitive electrode are independent electrodes, that is, the pressure-sensitive electrode is an active pen electrode independent of the pen tip position electrode. Therefore, the position electrode signal and the pressure-sensitive electrode signal are output synchronously, rather than the position signal and pressure-sensitive data sharing the same active pen electrode for serial output. Transmitting the position signal and pressure-sensitive data to the screen at the same time can significantly reduce the latency of the screen receiving the pressure-sensitive data of the active pen, thereby effectively reducing or avoiding phenomena such as slow ink output, ink leakage when lifting the pen, backlash when lifting the pen, and slow writing response of the active pen, improving the user's experience of using the active pen. For the screen, after receiving the above-mentioned position electrode signal and pressure-sensitive electrode signal through the screen, the screen's operating system obtains the corresponding position and pressure value of the active pen to complete the corresponding writing function.

[0058] Furthermore, the driving chip is electrically connected to the force sensor in the active pen, and the force sensor is used to collect the pen tip pressure signal of the active pen; wherein, the pressure-sensitive electrode signal is obtained by encoding the pressure-sensitive data corresponding to the pen tip pressure signal.

[0059] The pen tip pressure signal detected by the force sensor in the active pen characterizes the aforementioned pen tip pressure.

[0060] The pen tip pressure signal collected by the force sensor is converted into corresponding pressure-sensitive data. This pressure-sensitive data can be calculated by a processing unit in the driver chip or a processing unit outside the active pen driver chip, and the specific method is not limited. This pressure-sensitive data represents the pressure sensitivity level of the current pen tip pressure signal. The pressure-sensitive electrode signal is an electrode signal formed by encoding this pressure-sensitive data, and it is output through the pressure-sensitive electrode.

[0061] It should be noted that this embodiment can also achieve the same frequency for both position and pressure reporting rates. For example, it can achieve both a 360Hz position reporting rate and a 360Hz pressure reporting rate. In the original serial electrode method, because the same active pen electrode is used and the position and pressure signals are output serially, the pressure reporting rate is significantly lower at a 360Hz position reporting rate compared to a 360Hz pressure reporting rate. Therefore, this embodiment achieves almost zero latency between pressure-sensitive data and position data transmission, greatly reducing or avoiding transmission delay issues. This application can significantly reduce the ink dispensing delay of the active pen, greatly improving the user's writing experience.

[0062] In one embodiment, the position electrode signal and the pressure-sensitive electrode signal have different signal transmission frequencies.

[0063] In this embodiment, the output position electrode signal and the pressure-sensitive electrode signal can not only reduce the delay in pressure-sensitive data transmission, but also, because the two signals have different transmission frequencies, enable the screen to quickly and easily distinguish between pressure-sensitive data and position signals by the difference in the transmission frequency of the received signals, which is convenient for screen processing.

[0064] It should be understood that in other embodiments, the signal transmission frequency of the position electrode signal and the pressure-sensitive electrode signal may be the same, and the driving chip may also drive the electrode output signals to be different in phase to distinguish them, without being specifically limited.

[0065] In one embodiment, the pressure-sensitive electrode signal is obtained by phase encoding, frequency encoding, or amplitude encoding of the pressure-sensitive data.

[0066] In this embodiment, a driver chip is provided, which offers a variety of different encoding formats to encode pressure-sensitive data, ensuring the diversity and feasibility of the solution.

[0067] In one embodiment, such as Figure 2 As shown, the position electrode signal includes a first electrode signal and a second electrode signal; the pen tip position electrode includes independent first and second position electrodes, and the plurality of pins are respectively connected to the first and second position electrodes, so that the first position electrode outputs the first electrode signal, and the second position electrode synchronously outputs the second electrode signal. The first electrode signal is used to determine the coordinate information of the pen tip position, and the first electrode signal and the second electrode signal are used together to determine the direction information of the pen tip position.

[0068] In other words, the pen tip position electrodes include independent first position electrodes and second position electrodes, and the driver chip drives the pen tip position electrodes to output position electrode signals corresponding to the pen tip position, including:

[0069] The driving chip synchronously drives the first position electrode and the second position electrode, so that the first position electrode outputs a first electrode signal representing the first position and the second position electrode outputs a second electrode signal representing the second position.

[0070] The first electrode signal is used to determine the coordinate information of the pen tip position, and the first electrode signal and the second electrode signal are used together to determine the direction information of the pen tip position.

[0071] In this embodiment, the active pen includes independent first position electrodes, second position electrodes, and pressure-sensitive electrodes. For example, the first position electrode is the main electrode of the active pen, and the second position electrode is the secondary electrode; the specific details are not limited. As an example, such as... Figures 3-4 The above, Figures 3-4 The diagram illustrates the positional relationship of three independently configured first position electrodes, second position electrodes, and a pressure-sensitive electrode. The first position electrode is located at the end closest to the pen tip. The first position electrode, pressure-sensitive electrode, and second position electrode are arranged sequentially, with the pressure-sensitive electrode positioned between the first and second position electrodes. All three are fixed to the pen tip. It should be understood that... Figures 3-4 The electrode placement relationships shown are merely illustrative and do not limit the embodiments of this application.

[0072] by Figures 3-4 Taking the arrangement as an example, the first electrode signal is a position electrode signal that enables the screen to resolve the position of the stylus tip. This first electrode signal is output by the driver chip driving the first position electrode, and the first electrode signal corresponds to the first position. As an example, for instance... Figure 2 As shown, a certain number of horizontal and vertical detection electrodes can be distributed on the screen of the screen terminal. When the first electrode signal output by the first position electrode of the active pen acts on a certain position of the screen, the horizontal detection electrode and the vertical detection electrode corresponding to that position will generate corresponding first detection signals. Thus, the screen terminal can determine the two-dimensional coordinate position information of the pen tip position on the screen based on the first detection signal.

[0073] The second electrode signal is a position electrode signal used in conjunction with the first electrode signal to enable the screen to resolve the directional information of the stylus tip position. This second electrode signal is output by the second position electrode driven by the driver chip, and the second electrode signal represents the second position. Similarly, as an example, a certain number of horizontal and vertical detection electrodes can be distributed on the screen. When the second electrode signal output by the second position electrode of the stylus acts on a certain position on the screen, the horizontal and vertical detection electrodes corresponding to that position will generate corresponding second detection signals. Thus, the screen can determine the directional information of the stylus tip position on the screen based on the second detection signal and the first detection signal corresponding to the first electrode signal.

[0074] For the screen, after receiving the first electrode signal, the second electrode signal and the pressure-sensitive electrode signal through screen detection, the screen's operating system further processes the data to obtain the position of the active pen and the pressure value of the active pen, thereby completing the corresponding writing function.

[0075] In this embodiment, the active pen includes independent first position electrodes, second position electrodes, and pressure-sensitive electrodes. In addition to improving the timeliness of pen tip pressure-sensitive data transmission, the driving chip can also drive the first and second position electrodes to output corresponding position electrode signals to obtain more position information characterizing the pen tip position, including direction and two-dimensional coordinate position information, which can effectively improve the application scenarios and writing accuracy of the active pen.

[0076] like Figure 5 As shown, the first row (Coor1~Coor4) represents the first electrode signal representing the first position within a certain time period, and Press1~Press2 represents the pressure-sensitive signal that shares the first position electrode serial output with the first electrode signal. The first electrode signal and the pressure-sensitive signal are output serially in a time-division manner. The second row (Coor1~Coor4) represents the second electrode signal representing the second position within the same time period, which is output synchronously with the first electrode signal. For the screen end, its screen detection window needs to be synchronized with the serially output first electrode signal and pressure-sensitive signal in order to collect all electrode signals. The time-division serial output of the first electrode signal and the pressure-sensitive signal will take more time to transmit the two different signals, the position electrode signal and the pressure-sensitive signal, thus affecting the maximum reporting rate of the position signal and the pressure-sensitive signal.

[0077] like Figure 6 As shown, the first row (Coor1~Coor6) represents the first electrode signal representing the first position within a certain time period; the second row (Coor1~Coor6) represents the second electrode signal representing the second position within the same time period; and the third row (Press1~Press6) represents the pressure-sensitive electrode signals representing pressure data synchronously output within the same time period. These three electrode signals are output synchronously. For example, taking the first signal as an example, the signals Coor1 in the first row, Coor1 in the second row, and Press1 in the third row are output synchronously, specifically including the simultaneous output of the signals Coor1 in the first row, Coor1 in the second row, and Press1 in the third row. For the screen, the screen detection window maintains the same signal sampling period as the three electrode signals, thus acquiring the three electrode signals synchronously output from the active pen, achieving near-zero latency transmission.

[0078] In this embodiment, the first electrode signal, the second electrode signal, and the pressure-sensitive electrode signal are output synchronously, so that the active pen can simultaneously generate the first electrode signal, the second electrode signal, and the pressure-sensitive electrode signal, respectively. This embodiment can achieve the same frequency of position reporting rate and pressure-sensitive reporting rate, and can obtain more position information that characterizes the pressure of the active pen tip.

[0079] In one embodiment, driving the pressure-sensitive electrode also drives the pressure-sensitive electrode to output other active pen signals, which may include, but are not limited to, active pen button signals or active pen battery signals.

[0080] In this embodiment, the driver chip drives the pen tip position electrode to output a position electrode signal corresponding to the pen tip position, and drives the pressure-sensitive electrode to synchronously output a pressure-sensitive electrode signal. The driver chip also drives the pressure-sensitive electrode to output other active pen signals, which may include, but are not limited to, active pen button signals or active pen battery signals. These active pen signals and pressure-sensitive electrode signals are transmitted in a time-division multiplexing manner. For example, taking the above-mentioned three electrodes synchronously outputting signals as an example, in one embodiment, the driver chip synchronously drives the first position electrode and the second position electrode, causing the first position electrode to output a first electrode signal representing a first position, and the second position electrode to output a second electrode signal representing a second position. The driver chip also drives the pressure-sensitive electrode to output pressure-sensitive electrode signals and other active pen signals. The output pressure-sensitive electrode signals are synchronized with the first electrode signal and the second electrode signal, respectively, while the pressure-sensitive electrode signals and other active pen signals are output in a time-division multiplexing manner.

[0081] It should be noted that the "other active pen signal" refers to active pen signals that are distinct from the aforementioned position and pressure sensitivity data. As active pens develop, this active pen signal may include any active pen signals that may be involved in future active pen application scenarios, without any specific limitation. As an example, this active pen signal includes, but is not limited to, active pen button signals or active pen battery signals, where the active pen battery signal represents the remaining battery power of the active pen.

[0082] In this embodiment, a driver chip is provided, which can also enable the pressure-sensitive electrode to output pressure-sensitive electrode signals and other active pen signals in a time-division serial manner, thereby improving the applicability and application scenarios of the active pen and providing higher application value and scalability.

[0083] In one embodiment of this application, the driver chip includes a pressure detection unit (Forcedetect), a signal generation unit (Generater), an encoding unit (Encoder), and a high-voltage coding unit (HV Boost).

[0084] The output terminal of the signal generation unit is connected to the input terminal of the encoding unit, and the output terminal of the encoding unit is connected to the input terminal of the high-voltage coding unit. The first position electrode output terminal, the second position electrode output terminal, and the pressure-sensitive electrode output terminal of the high-voltage coding unit are respectively connected to the first position electrode, the second position electrode, and the pressure-sensitive electrode via a switching unit. The pressure-sensitive data is calculated from the pen tip pressure signal converted by the pressure detection unit. For example, the signal generation unit can be a PWM signal generation unit (PWM Generater), but there is no specific limitation.

[0085] like Figure 7 As shown, the three output terminals of the signal generation unit are respectively connected to the three input terminals of the encoding unit, and the three output terminals of the encoding unit are respectively connected to the three input terminals of the high-voltage coding unit. The first electrode output terminal S1 of the high-voltage coding unit is connected to the first position electrode via the first switch unit K1, the second electrode output terminal S2 of the high-voltage coding unit is connected to the second position electrode via the second switch unit K2, and the pressure-sensitive electrode output terminal S3 of the high-voltage coding unit is connected to the pressure-sensitive electrode via the third switch unit K3. Specifically, the first electrode output terminal S1 of the high-voltage coding unit is connected to one end of the first switching unit K1, and the other end of the first switching unit K1 is connected to the first position electrode through the first pin (TRX1) of the driver chip; the second electrode output terminal S2 of the high-voltage coding unit is connected to one end of the second switching unit K2, and the other end of the second switching unit K2 is connected to the second position electrode through the third pin (TRX3) of the driver chip; the pressure-sensitive electrode output terminal S3 of the high-voltage coding unit is connected to one end of the third switching unit K3, and the other end of the third switching unit K3 is connected to the pressure-sensitive electrode through the second pin (TRX2) of the driver chip.

[0086] The input terminal of the pressure detection unit is used to connect to the force sensor, and the pressure detection unit converts the pen tip pressure signal collected by the force sensor; for example, the conversion includes signal amplification and digital-to-analog conversion.

[0087] The encoding unit encodes a first position encoded signal based on a first generated signal output by the signal generation unit. The encoding unit also encodes a pressure-sensitive encoded signal based on a second generated signal output by the signal generation unit and the pressure-sensitive data. Finally, the encoding unit encodes a second position encoded signal based on a third generated signal output by the signal generation unit. The first position encoded signal, the second position encoded signal, and the pressure-sensitive encoded signal are then encoded by the high-voltage coding unit to obtain the first electrode signal, the second electrode signal, and the pressure-sensitive electrode signal, respectively. The first generated signal, the second generated signal, and the third generated signal output by the signal generation unit are initial signals used for signal encoding, and can be PWM waveform signals.

[0088] In this embodiment, a specific circuit unit relationship within the driver chip is provided. It can be seen that, in addition to ensuring the output of pressure-sensitive electrode signals and position electrode signals by the driver chip in this embodiment, the position electrode output terminal and pressure-sensitive electrode output terminal of the high-voltage coding unit are respectively connected to the pen tip position electrode and pressure-sensitive electrode via a switching unit, which facilitates the driver chip's control over the transmission and reception of electrode signals. Furthermore, the pressure detection unit can convert the pen tip pressure signal collected by the force sensor into a pen tip pressure signal that is easy to use. Moreover, the encoding unit encodes the pressure-sensitive data based on the signal generated by the signal generation unit, enabling rapid encoding to obtain a pressure-sensitive encoded signal.

[0089] In this embodiment, the driver chip also includes modules such as a power module and a clock module required for the operation of the driver chip, and the specific modules are not limited.

[0090] It should be noted that, Figure 7 This is merely an illustrative example and does not limit the embodiments of this application. For example, in some other embodiments, the signal generation unit may be omitted, and the first position encoded signal, the second position encoded signal, and the pressure-sensitive encoded signal may be encoded by the encoding unit and then processed by the high-voltage coding unit; for another example, if the performance of the force sensor is sufficient, the detection unit may not need to amplify the processing, and so on, etc., and no specific limitation is made.

[0091] Please continue reading as follows Figure 7As shown, in one embodiment, the force sensor can be a capacitive or resistive force sensor (C / R Force Sensor). The pressure detection unit includes an amplifier (AMP), a first multiplexer (MUX), and an analog-to-digital converter (ADC). The two ends of the force sensor are connected to the two input terminals of the amplifier (AMP) through driver chip pins (IA_P, IA_P). The two output terminals of the amplifier (AMP) are connected to the two input terminals of the first multiplexer (MUX), and the output terminal of the first multiplexer (MUX) is connected to the analog-to-digital converter (ADC).

[0092] In this embodiment, the input terminal of the pressure detection unit is used to connect to the force sensor. The collected pen tip pressure signal is amplified by an amplifier (AMP). The amplified pen tip pressure signal is processed by a first multiplexer (MUX) and then input to an analog-to-digital converter (ADC) for digital-to-analog conversion to facilitate subsequent processing.

[0093] As an example, the active pen also includes a processing unit, which is electrically connected to the pressure detection unit of the driving chip; the pen tip pressure signal collected by the force sensor is detected and processed by the pressure detection unit and then sent to the processing unit for processing, so as to be converted into the pressure-sensitive data by the processing unit.

[0094] like Figure 8 As shown, the driver chip is electrically connected to the processing unit. Specifically, the output terminal of the force detection unit of the driver chip is connected to the processing unit. The pen tip pressure signal collected by the force sensor is detected and processed by the pressure detection unit and then sent to the processing unit of the active pen for further processing, so that it is converted into corresponding pressure-sensitive data. Figure 7 The dashed lines in the diagram represent how pressure-sensitive data can be, for example... Figure 8 The pressure-sensitive data is calculated by a processing unit outside the active pen's internal driver chip, or it can be calculated by a processing unit within the driver chip and transmitted by the pressure detection unit to the encoding unit for processing; the specific calculation is not limited. This pressure-sensitive data characterizes the corresponding pressure sensitivity level of the current pen tip pressure signal. After processing by the encoding unit and the high-voltage coding unit, the pressure-sensitive data forms a pressure-sensitive electrode signal, which is output through the pressure-sensitive electrode. In other words, the pressure-sensitive electrode signal is the electrode signal formed after encoding the pressure-sensitive data, and the driver chip drives the pressure-sensitive electrode to output the pressure-sensitive electrode signal. Figure 7 The dashed lines in the diagram represent the converted pressure-sensitive data being transmitted to the encoding unit for encoding processing.

[0095] Please continue reading as follows Figure 7As shown, in one embodiment, the driver chip further includes a decoding unit, which is used to perform decoding operations on the screen signals fed back from the screen. Specific details are not elaborated here. As an example, the decoding unit is connected to the pen tip position electrode and the pressure-sensitive electrode.

[0096] like Figure 7 As shown, the decoding unit includes a second multiplexer (MUX), an uplink analog front-end (UplinkAFE), and an uplink decoder. The three input terminals of the second multiplexer (MUX) are connected to the first electrode, the second electrode, and the pressure-sensitive electrode, respectively. Specifically, the first output terminal O1 of the second multiplexer is connected to the first position electrode via the fourth switching unit K4; the second output terminal O2 of the second multiplexer is connected to the second position electrode via the fifth switching unit K5; and the third output terminal O3 of the second multiplexer is connected to the pressure-sensitive electrode via the sixth switching unit K6. Specifically, the first output terminal O1 of the second multiplexer is connected to one end of the fourth switching unit K4, and the other end of the fourth switching unit K4 is connected to the first position electrode through the first pin (TRX1) of the driver chip; the second output terminal O2 of the second multiplexer is connected to one end of the fifth switching unit K5, and the other end of the fifth switching unit K5 is connected to the second position electrode through the third pin (TRX3) of the driver chip; the third output terminal O3 of the second multiplexer is connected to one end of the sixth switching unit K6, and the other end of the sixth switching unit K6 is connected to the pressure-sensitive electrode through the second pin (TRX2) of the driver chip.

[0097] It should be noted that the driver chip pins include TRX1, TRX2 and TRX3. These three pins are used to transmit position electrode signals and pressure-sensitive electrode signals, as well as to receive relevant signals from the screen.

[0098] In this embodiment, a driver chip is provided, which further includes a decoding unit connected to the pen tip position electrode (such as the first position electrode and the second position electrode) and the pressure-sensitive electrode respectively. This enables the driver chip to receive and decode signals from the screen, complete corresponding operations, improve the applicability of the driver chip, and add more functions.

[0099] In one embodiment, such as Figure 9 As shown, the high-voltage coding unit includes a low-voltage to high-voltage module, a first high-voltage coding module, a second high-voltage coding module, and a third high-voltage coding module; the low-voltage to high-voltage module boosts the low-voltage power supply to a first voltage, a second voltage, and a third voltage, where the first voltage, the second voltage, and the third voltage are the high-voltage power supplies for the first high-voltage coding module, the second high-voltage coding module, and the third high-voltage coding module, respectively.

[0100] The first position coding signal is coded by the first high-voltage coding module to obtain the first electrode signal, the pressure-sensitive coding signal is coded by the second high-voltage coding module to obtain the pressure-sensitive electrode signal, and the second position coding signal is coded by the second high-voltage coding module to obtain the second electrode signal.

[0101] For example, the high-voltage coding unit is powered by a low-voltage power supply, which can be the low-voltage input from the active pen battery Vbat. This low-voltage power supply is then boosted to a first voltage, a second voltage, and a third voltage via an internal low-voltage to high-voltage converter, for example, to 20V / 40V / 60V respectively. This boosted voltage is then supplied to the first, second, and third high-voltage coding modules as a high-voltage power supply. Three independent first position coding signal, pressure-sensitive coding signal, and second position coding signal generated by the coding unit are input to these three independent high-voltage coding modules. Each module performs coding processing, outputting three independent digitally encoded high-voltage waveforms, which are then output through three independent electrodes to obtain the first electrode signal, the pressure-sensitive electrode signal, and the second electrode signal.

[0102] The above embodiments provide a detailed description of the driver chip provided in the embodiments of this application. In the embodiments of this application, an active pen including the driver chip is also provided, wherein the driver chip may be disposed in the active pen in the form of a packaged chip or other physical entity.

[0103] A second aspect of this application provides an active pen, which includes a driver chip, a pen tip position electrode, and a pressure-sensitive electrode. The pen tip position electrode and the pressure-sensitive electrode are independent electrodes, and the driver chip is electrically connected to the pen tip position electrode and the pressure-sensitive electrode.

[0104] The driving chip includes multiple pins, which are respectively connected to the pen tip position electrode and the pressure-sensitive electrode, and drive the pen tip position electrode to output a position electrode signal corresponding to the pen tip position and drive the pressure-sensitive electrode to output a pressure-sensitive electrode signal synchronously.

[0105] In this embodiment, an active pen is provided. The driving chip of the active pen drives the pen tip position electrode to output a position electrode signal corresponding to the pen tip position, and drives the pressure-sensitive electrode to output a pressure-sensitive electrode signal synchronously. The pen tip position electrode and the pressure-sensitive electrode are independent electrodes, that is, the pressure-sensitive electrode is an active pen electrode independent of the pen tip position electrode. Therefore, the position electrode signal and the pressure-sensitive electrode signal are output synchronously, rather than sharing the same active pen electrode. This can significantly reduce the latency of the screen receiving the pressure-sensitive data of the active pen, thereby effectively reducing or avoiding phenomena such as slow ink output, ink leakage when lifting the pen, backlash when lifting the pen, and slow writing response, thus improving the user experience of the active pen. For the screen, after receiving the above-mentioned position electrode signal and pressure-sensitive electrode signal through the screen, the screen's operating system obtains the corresponding position and pressure value of the active pen to complete the corresponding writing function.

[0106] Furthermore, the position electrode signal includes a first electrode signal and a second electrode signal; the pen tip position electrode includes an independent first position electrode and a second position electrode, and the plurality of pins are respectively connected to the first position electrode and the second position electrode, so that the first position electrode outputs the first electrode signal and the second position electrode synchronously outputs the second electrode signal;

[0107] The first electrode signal is used to determine the coordinate information of the pen tip position, and the first electrode signal and the second electrode signal are used together to determine the direction information of the pen tip position.

[0108] In this embodiment, an active pen is provided, which includes an independent first position electrode, a second position electrode, and a pressure-sensitive electrode. In addition to reducing the transmission delay of pressure-sensitive data, the active pen can also be driven by a driver chip to output corresponding position electrode signals from the first and second position electrodes respectively, so as to obtain more directional and two-dimensional coordinate information that characterizes the position of the pen tip, which can effectively improve the application scenarios and writing accuracy of the active pen.

[0109] Furthermore, the driving chip is electrically connected to the force sensor in the active pen, and the force sensor is used to collect the pen tip pressure signal of the active pen; wherein, the pressure-sensitive electrode signal is obtained by encoding the pressure-sensitive data corresponding to the pen tip pressure signal.

[0110] Furthermore, the position electrode signal and the pressure-sensitive electrode signal have different signal transmission frequencies.

[0111] In this embodiment, an active pen is provided, and the signal transmission frequencies of the position electrode signal and the pressure-sensitive electrode signal are different. Since the signal transmission frequencies of the two are different, the screen can quickly and easily distinguish pressure-sensitive data and position signals by the difference in the signal transmission frequencies of the received signals, which is convenient for screen processing.

[0112] It should be understood that in other embodiments, the signal transmission frequency of the position electrode signal and the pressure-sensitive electrode signal may be the same, and the driving chip may also drive the electrode output signals to be different in phase to distinguish them, without being specifically limited.

[0113] Furthermore, the pressure-sensitive electrode signal is obtained by phase encoding, frequency encoding, or amplitude encoding of the pressure-sensitive data.

[0114] In this embodiment, an active pen is provided that can provide a variety of different encoding formats to encode pressure-sensitive data, ensuring the diversity and feasibility of the solution.

[0115] Furthermore, the pressure-sensitive electrode is also driven to output other active pen signals, which may include, but are not limited to, active pen button signals or active pen battery signals.

[0116] In this embodiment, an active pen is provided, which also allows the pressure-sensitive electrode to output pressure-sensitive electrode signals and other active pen signals in a time-division serial manner, thereby improving the applicability and application scenarios of the active pen and providing higher application value and scalability.

[0117] Furthermore, in this active pen, the driving chip includes a pressure detection unit, a signal generation unit, an encoding unit, and a high-voltage coding unit;

[0118] The output terminal of the signal generation unit is connected to the input terminal of the encoding unit, and the output terminal of the encoding unit is connected to the input terminal of the high-voltage coding unit. The first position electrode output terminal, the second position electrode output terminal, and the pressure-sensitive electrode output terminal of the high-voltage coding unit are respectively connected to the first position electrode, the second position electrode, and the pressure-sensitive electrode via a switching unit.

[0119] The input terminal of the pressure detection unit is used to connect to the force sensor. The pressure detection unit converts the pen tip pressure signal collected by the force sensor. The pressure data is calculated from the pen tip pressure signal converted by the pressure detection unit.

[0120] The encoding unit encodes a first position encoding signal based on a first generated signal output by the signal generation unit, the encoding unit encodes a pressure-sensitive encoding signal based on a second generated signal output by the signal generation unit and the pressure-sensitive data, and the encoding unit encodes a second position encoding signal based on a third generated signal output by the signal generation unit. The first position encoding signal, the second position encoding signal, and the pressure-sensitive encoding signal are then encoded by the high-voltage coding unit to obtain the first electrode signal, the second electrode signal, and the pressure-sensitive electrode signal, respectively.

[0121] In this embodiment, an active pen is provided. In addition to ensuring that the driver chip outputs pressure-sensitive electrode signals and position electrode signals as described in this application embodiment, the position electrode output terminal and pressure-sensitive electrode output terminal of the high-voltage coding unit are respectively connected to the pen tip position electrode and pressure-sensitive electrode via a switching unit, which facilitates the driver chip to control the transmission and reception of electrode signals. Furthermore, the pressure detection unit can convert the pen tip pressure signal collected by the force sensor into a pen tip pressure signal that is easy to use. Moreover, the encoding unit encodes the pressure-sensitive data based on the initial signal of the signal generation unit, which can quickly realize encoding.

[0122] In this embodiment, the driver chip of the active pen also includes a power unit, a clock unit, etc., which are required for operation, so that the driver chip can work.

[0123] It should be noted that in some other embodiments, the active pen may also omit the signal generation unit, and instead the encoding unit directly encodes and generates the pressure-sensitive encoded signal, which is then processed by the boost unit to obtain the pressure-sensitive electrode signal; for example, if the performance of the force sensor is sufficient, the detection unit may not need to amplify the signal, and so on, etc., and the specifics are not limited.

[0124] In one embodiment, the force sensor in the active pen can be a capacitive or resistive force sensor (C / R ForceSensor). The pressure detection unit includes an amplifier (AMP), a first multiplexer (MUX), and an analog-to-digital converter (ADC). The two ends of the force sensor are connected to the two input terminals of the amplifier (AMP) through driver chip pins (IA_P, IA_P). The two output terminals of the amplifier (AMP) are connected to the two input terminals of the first multiplexer (MUX), and the output terminal of the first multiplexer (MUX) is connected to the analog-to-digital converter (ADC).

[0125] In this embodiment, the input terminal of the pressure detection unit is connected to the force sensor. The collected pen tip pressure signal is amplified by an amplifier (AMP). The amplified pen tip pressure signal is processed by a first multiplexer (MUX) and then input to an analog-to-digital converter (ADC) for digital-to-analog conversion to facilitate subsequent processing.

[0126] like Figure 7 As shown, in one embodiment, the driver chip of the active pen may further include a decoding unit, through which the active pen performs relevant decoding operations on the screen signals fed back from the screen. The specific details will not be elaborated here.

[0127] As an example, the decoding unit is connected to the pen tip position electrode and the pressure-sensitive electrode. As an illustration, the decoding unit includes a second multiplexer (MUX), an uplink analog front-end (Uplink AFE), and an uplink decoder. The three inputs of the second multiplexer (MUX) are connected to the first electrode, the second electrode, and the pressure-sensitive electrode, respectively. When the driver chip exists in the form of a chip or other physical entity, the chip pins include TRX1, TRX2, and TRX3. These three pins are used to transmit position electrode signals and pressure-sensitive electrode signals, as well as to receive signals related to the screen.

[0128] In this embodiment, an active pen is provided. The driving chip in the active pen also includes a decoding unit that is respectively connected to the pen tip position electrode (such as the first position electrode and the second position electrode) and the pressure-sensitive electrode. This enables the driving chip to receive and decode signals from the screen, complete corresponding operations, improve the applicability of the driving chip, and integrate more functions.

[0129] In one embodiment, such as Figure 9 As shown, the high-voltage coding unit includes a low-voltage to high-voltage module, a first high-voltage coding module, a second high-voltage coding module, and a third high-voltage coding module; the low-voltage to high-voltage module boosts the low-voltage power supply to a first voltage, a second voltage, and a third voltage, where the first voltage, the second voltage, and the third voltage are the high-voltage power supplies for the first high-voltage coding module, the second high-voltage coding module, and the third high-voltage coding module, respectively.

[0130] The first position coding signal is coded by the first high-voltage coding module to obtain the first electrode signal, the pressure-sensitive coding signal is coded by the second high-voltage coding module to obtain the pressure-sensitive electrode signal, and the second position coding signal is coded by the second high-voltage coding module to obtain the second electrode signal.

[0131] In one of the active pen solutions provided in the second aspect of this application, the active pen's driving chip drives the pen tip position electrode to output a position electrode signal corresponding to the pen tip position, and drives the pressure-sensitive electrode to synchronously output a pressure-sensitive electrode signal. The pen tip position electrode and the pressure-sensitive electrode are independent electrodes, that is, the pressure-sensitive electrode is an active pen electrode independent of the pen tip position electrode. In other words, the position electrode signal and the pressure-sensitive electrode signal are output synchronously, rather than the position signal and pressure-sensitive signal sharing the same active pen electrode for serial transmission. Transmitting the position signal and pressure-sensitive data to the screen at the same time can significantly reduce the latency of the screen receiving the pressure-sensitive data, thereby effectively reducing or avoiding phenomena such as slow ink output when writing, ink leakage when lifting the pen, backlash when lifting the pen, and slow writing response, thus improving the user's experience with the active pen.

[0132] For specific limitations, explanations, and further embodiments regarding the aforementioned active pen, please refer to the relevant descriptions in the first aspect driver chip embodiments above, which will not be repeated here.

[0133] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is used as an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0134] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A driver chip for an active pen, characterized in that, The active pen includes a pen tip position electrode and a pressure-sensitive electrode. The pen tip position electrode and the pressure-sensitive electrode are independent electrodes. The driving chip is used to electrically connect to the pen tip position electrode and the pressure-sensitive electrode. The driving chip includes multiple pins, which are respectively connected to the pen tip position electrode and the pressure-sensitive electrode, and drive the pen tip position electrode to output a position electrode signal corresponding to the pen tip position and drive the pressure-sensitive electrode to output a pressure-sensitive electrode signal synchronously.

2. The driver chip according to claim 1, characterized in that, The position electrode signal includes a first electrode signal and a second electrode signal; the pen tip position electrode includes an independent first position electrode and a second position electrode, and the plurality of pins are respectively connected to the first position electrode and the second position electrode, so that the first position electrode outputs the first electrode signal and the second position electrode synchronously outputs the second electrode signal; The first electrode signal is used to determine the coordinate information of the pen tip position, and the first electrode signal and the second electrode signal are used together to determine the direction information of the pen tip position.

3. The driver chip according to claim 1, characterized in that, The driving chip is electrically connected to the force sensor in the active pen, and the force sensor is used to collect the pen tip pressure signal of the active pen; wherein, the pressure-sensitive electrode signal is obtained by encoding the pressure-sensitive data corresponding to the pen tip pressure signal.

4. The driver chip according to claim 1, characterized in that, The position electrode signal and the pressure-sensitive electrode signal have different signal transmission frequencies; wherein, the pressure-sensitive electrode signal is obtained by phase encoding, frequency encoding or amplitude encoding of pressure-sensitive data.

5. The driver chip according to claim 1, characterized in that, The pressure-sensitive electrode is also driven to output other active pen signals, including active pen button signals or active pen battery signals.

6. The driver chip according to claim 2, characterized in that, The driving chip includes a pressure detection unit, a signal generation unit, an encoding unit, and a high-voltage coding unit; The three output terminals of the signal generation unit are respectively connected to the three input terminals of the encoding unit, and the three output terminals of the encoding unit are respectively connected to the three input terminals of the high voltage coding unit. The first position electrode output terminal, the second position electrode output terminal, and the pressure-sensitive electrode output terminal of the high voltage coding unit are respectively connected to the first position electrode, the second position electrode, and the pressure-sensitive electrode via a switching unit. The input terminal of the pressure detection unit is used to connect to the force sensor in the active pen. The pressure detection unit converts the pen tip pressure signal collected by the force sensor. The pressure sensitivity data corresponding to the pen tip pressure signal is calculated from the pen tip pressure signal converted by the pressure detection unit. The encoding unit encodes a first position encoding signal based on the first generated signal output by the signal generation unit, the encoding unit encodes a pressure-sensitive encoding signal based on the pressure-sensitive data corresponding to the pen tip pressure signal based on the second generated signal output by the signal generation unit, and the encoding unit encodes a second position encoding signal based on the third generated signal output by the signal generation unit. The first position encoding signal, the second position encoding signal, and the pressure-sensitive encoding signal are then encoded by the high-voltage coding unit to obtain the first electrode signal, the second electrode signal, and the pressure-sensitive electrode signal, respectively.

7. The driver chip according to claim 6, characterized in that, The high-voltage coding unit includes a low-voltage to high-voltage module, a first high-voltage coding module, a second high-voltage coding module, and a third high-voltage coding module. The low-voltage to high-voltage module boosts the low-voltage power supply to a first voltage, a second voltage, and a third voltage, where the first voltage, the second voltage, and the third voltage are the high-voltage power supplies of the first high-voltage coding module, the second high-voltage coding module, and the third high-voltage coding module, respectively. The first position coding signal is coded by the first high-voltage coding module to obtain the first electrode signal, the pressure-sensitive coding signal is coded by the second high-voltage coding module to obtain the pressure-sensitive electrode signal, and the second position coding signal is coded by the second high-voltage coding module to obtain the second electrode signal.

8. An active pen, characterized in that, The active pen includes a driver chip, a pen tip position electrode, and a pressure-sensitive electrode. The pen tip position electrode and the pressure-sensitive electrode are independent electrodes. The driver chip is electrically connected to the pen tip position electrode and the pressure-sensitive electrode. The driving chip includes multiple pins, which are respectively connected to the pen tip position electrode and the pressure-sensitive electrode, and drive the pen tip position electrode to output a position electrode signal corresponding to the pen tip position and drive the pressure-sensitive electrode to output a pressure-sensitive electrode signal synchronously.

9. The active pen according to claim 8, characterized in that, The position electrode signal includes a first electrode signal and a second electrode signal; the pen tip position electrode includes an independent first position electrode and a second position electrode, and the plurality of pins are respectively connected to the first position electrode and the second position electrode, so that the first position electrode outputs the first electrode signal and the second position electrode synchronously outputs the second electrode signal; The first electrode signal is used to determine the coordinate information of the pen tip position, and the first electrode signal and the second electrode signal are used together to determine the direction information of the pen tip position.

10. The active pen according to claim 8, characterized in that, The driving chip is electrically connected to the force sensor in the active pen, and the force sensor is used to collect the pen tip pressure signal of the active pen; wherein, the pressure-sensitive electrode signal is obtained by encoding the pressure-sensitive data corresponding to the pen tip pressure signal.

11. The active pen according to claim 8, characterized in that, The position electrode signal and the pressure-sensitive electrode signal have different signal transmission frequencies; wherein, the pressure-sensitive electrode signal is obtained by phase encoding, frequency encoding or amplitude encoding of pressure-sensitive data.

12. The active pen according to claim 8, characterized in that, The pressure-sensitive electrode is also driven to output other active pen signals, including active pen button signals or active pen battery signals.

13. The active pen according to claim 9, characterized in that, The driving chip includes a pressure detection unit, a signal generation unit, an encoding unit, and a high-voltage coding unit; The output terminal of the signal generation unit is connected to the input terminal of the encoding unit, the output terminal of the encoding unit is connected to the input terminal of the high voltage coding unit, and the first position electrode output terminal, the second position electrode output terminal, and the pressure-sensitive electrode output terminal of the high voltage coding unit are respectively connected to the first position electrode, the second position electrode, and the pressure-sensitive electrode via a switching unit. The input terminal of the pressure detection unit is used to connect to the force sensor in the active pen. The pressure detection unit converts the pen tip pressure signal collected by the force sensor. The pressure sensitivity data corresponding to the pen tip pressure signal is calculated from the pen tip pressure signal converted by the pressure detection unit. The encoding unit encodes a first position encoding signal based on the first generated signal output by the signal generation unit, the encoding unit encodes a pressure-sensitive encoding signal based on the pressure-sensitive data corresponding to the pen tip pressure signal based on the second generated signal output by the signal generation unit, and the encoding unit encodes a second position encoding signal based on the third generated signal output by the signal generation unit. The first position encoding signal, the second position encoding signal, and the pressure-sensitive encoding signal are then encoded by the high-voltage coding unit to obtain the first electrode signal, the second electrode signal, and the pressure-sensitive electrode signal, respectively.

14. The active pen according to claim 13, characterized in that, The active pen also includes a processing unit, which is electrically connected to the pressure detection unit of the driving chip. The pen tip pressure signal collected by the force sensor is detected and processed by the pressure detection unit and then sent to the processing unit for further processing, so as to be converted into the pressure-sensitive data by the processing unit.

15. The active pen according to claim 13, characterized in that, The high-voltage coding unit includes a low-voltage to high-voltage module, a first high-voltage coding module, a second high-voltage coding module, and a third high-voltage coding module. The low-voltage to high-voltage module boosts the low-voltage power supply to a first voltage, a second voltage, and a third voltage, where the first voltage, the second voltage, and the third voltage are the high-voltage power supplies of the first high-voltage coding module, the second high-voltage coding module, and the third high-voltage coding module, respectively. The first position coding signal is coded by the first high-voltage coding module to obtain the first electrode signal, the pressure-sensitive coding signal is coded by the second high-voltage coding module to obtain the pressure-sensitive electrode signal, and the second position coding signal is coded by the second high-voltage coding module to obtain the second electrode signal.

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