Active pen and interaction system

Abstract

The invention provides an active pen and an interaction system, and relates to the technical field of electronics. The active pen comprises a driving device used for providing a driving signal, and the driving signal comprises a signal obtained by processing writing recording of a traditional pen; the motor device is used for receiving the driving signal, the driving signal is used for driving the motor device to generate a vibration signal and a sound signal, and the vibration signal and the sound signal are used for representing the brush type of the active pen. According to the scheme, the motor device in the active pen can generate the vibration signal and the sound signal at the same time by receiving the driving signal, the vibration signal can simulate the touch sense in the traditional writing process, the sound signal can restore the friction sound in the traditional writing process, the reduction degree of the active pen to the traditional paper pen is improved, and the writing efficiency is improved. The brush types of different active pens are represented, so that the interactivity and the user experience of the active pens are improved.

Description

Technical Field

[0001] The present application relates to the field of electronic technology, and more specifically, to an active pen and an interactive system. Background Art

[0002] An active stylus, also known as an active pen, is an advanced electronic writing tool that interacts with the touch screen through built-in electronic components and sensors, providing a more precise and smoother writing experience than a traditional passive stylus. With the continuous development of technology, the functions and performance of active pens are also constantly improving, becoming one of the indispensable accessories for smart devices. Currently, when users use active pens, the degree of restoration of the traditional paper-pen interaction experience is poor, which affects the user experience.

[0003] Therefore, how to improve the user experience of active pens is a technical problem that needs to be solved urgently. Summary of the invention

[0004] The present application provides an active pen and an interactive system, which can improve the degree of restoration of the active pen to the traditional paper and pen, thereby improving the user experience.

[0005] In a first aspect, an active pen is provided, comprising: a driving device, the driving device being used to provide a driving signal, the driving signal comprising a signal obtained by processing a recording of writing by a traditional pen; a motor device, the motor device being used to receive the driving signal, the driving signal being used to drive the motor device to generate a vibration signal and a sound signal, the vibration signal and the sound signal being used to characterize the brush type of the active pen.

[0006] Through the technical solution of the embodiment of the present application, the motor device can generate a vibration signal and a sound signal at the same time by receiving a driving signal. The vibration signal can simulate the touch during traditional writing, and the sound signal can restore the friction sound during traditional writing. This is conducive to improving the degree of restoration of the active pen to the traditional paper and pen, so as to characterize the brush types of different active pens, thereby improving the interactivity and user experience of the active pen. At the same time, integrating the vibration and sound generation functions into a single component not only saves internal space, but also reduces power consumption, thereby further improving the user experience.

[0007] In combination with the first aspect, in a possible implementation, the active pen also includes: a pressure detection device, which is used to detect the pen tip pressure of the active pen to form a pressure detection signal; the driving device is also used to adjust the driving signal according to the pressure detection signal to adjust the vibration signal and sound signal generated by the motor device.

[0008] In this embodiment, the active pen can adjust the driving signal of the motor device according to the real-time nib pressure of the user, so as to adjust the vibration effect and sound effect of the motor device, so that the feedback of the active pen can match the current writing state in real time, which is beneficial to further improving the user experience of using the active pen.

[0009] Combined with the first aspect, in a possible implementation manner, the driving signal includes a PWM wave signal, and the driving device includes a duty cycle adjustment unit, and the duty cycle adjustment unit is used to adjust the duty cycle of the PWM wave signal according to the pressure detection signal, so as to adjust the vibration signal and the sound signal.

[0010] Combined with the first aspect, in a possible implementation manner, if the pressure detection signal is within the first preset pressure range, the duty cycle adjustment unit is used to adjust the duty cycle of the PWM wave signal to a first preset value; or, if the pressure detection signal is within the second preset pressure range, the duty cycle adjustment unit is used to adjust the duty cycle of the PWM wave signal to a second preset value; wherein, the maximum value of the first preset pressure range is less than the minimum value of the second preset pressure range, and the first preset value is less than the second preset value.

[0011] In the above embodiment, by detecting the magnitude of the pressure detection signal of the nib of the active pen, the duty cycle of the driving signal is correspondingly adjusted, so as to realize the regulation of the vibration signal of the motor device. For example, if the writing pressure of the user is small, the duty cycle is low, so as to generate a gentle vibration; if the writing pressure of the user is large, the duty cycle is high, so as to generate a stronger vibration. Therefore, by hierarchically regulating the pressure detection signal, the reduction degree of the active pen to the traditional pen and paper can be improved, thereby enhancing the user experience.

[0012] Combined with the first aspect, in a possible implementation manner, the active pen further includes: a communication device, configured to receive a speed detection signal sent by a functional device, where the speed detection signal is used to characterize the writing speed of the active pen on the functional device; the driving device is further configured to adjust the driving signal according to the speed detection signal to adjust the vibration signal and the sound signal generated by the motor device.

[0013] In this embodiment, the active pen can adjust the first driving signal of the motor device according to the real-time writing speed of the user, so as to adjust the vibration effect of the motor device, so that the feedback of the active pen can match the current writing state in real time, which is beneficial to further improving the user experience of using the active pen.

[0014] Combined with the first aspect, in a possible implementation manner, the driving device includes a control unit, and the control unit is configured to control whether to output a driving signal to the motor device according to the speed detection signal, so as to control whether the motor device generates a vibration signal and a sound signal.

[0015] In combination with the first aspect, in a possible implementation, if the speed detection signal is greater than a preset threshold, the control unit is configured to output a drive signal to the motor device; if the speed detection signal is less than or equal to the preset threshold, the control unit is configured to stop outputting the drive signal to the motor device.

[0016] In the above implementation, by detecting the speed detection signal, the vibration signal of the motor device can be regulated according to different writing speeds. For example, if the functional device detects that the speed detection signal is less than or equal to a preset threshold (such as 3 cm / s), at this time the speed detection signal is small. For example, the user pauses the writing operation using the active pen, so the active pen stops the motor device from generating a vibration signal. Therefore, by detecting the speed detection signal, the accuracy of the feedback effect of the active pen can be improved, which is beneficial to enhancing the user experience.

[0017] In combination with the first aspect, in a possible implementation, the communication device is further configured to receive a paper type signal sent by the functional device; the driving device is further configured to adjust the drive signal according to the paper type signal to adjust the vibration signal and the sound signal generated by the motor device.

[0018] In combination with the first aspect, in a possible implementation, the control unit is further configured to adjust the output interval of multiple sub-drive signals of the drive signal in the time domain, and the multiple sub-drive signals are used to drive the motor device in a time-sharing manner.

[0019] Through the above technical solution, the control unit can adjust the output interval of multiple sub-drive signals in the drive signal, and these signals drive the motor device in a time-sharing manner to simulate different paper writing effects, thereby further improving the feedback effect of the vibration signal and enhancing the interaction authenticity and user experience of the active pen.

[0020] In combination with the first aspect, in a possible implementation, the driving device further includes: a filtering unit, and the filtering unit is configured to pass a target sub-drive signal of the drive signal in the frequency domain, and the frequency range of the target sub-drive signal includes 150 Hz to 20 KHz.

[0021] In this embodiment, the motor device filters the driving signals in the low-frequency band and the high-frequency band to obtain a sub-driving signal in the target band. Among them, the low-frequency band can be less than 150 Hz. By filtering the driving signal in the low-frequency band, the vibration signal can be made coherent, the sense of jerk can be reduced, and at the same time, the sound emitted by the motor device can be made more delicate. In addition, the high-frequency band can be greater than 20 KHz. By filtering the driving signal in the high-frequency band, it is beneficial to increase the vibration efficiency of the motor device and save the energy consumption of the active pen. The filtering unit filters the high-frequency signal and the low-frequency signal to retain the sub-driving signal within the above target band range, which is not only beneficial for the motor device to balance the strong vibration effect and sound effect, but also beneficial for reducing the energy consumption of the active pen.

[0022] Combined with the first aspect, in a possible implementation, the frequency range of the target sub-driving signal includes the resonance frequency of the motor device.

[0023] At the resonance frequency, the vibration efficiency of the motor device is the highest, and the strongest vibration feedback can be generated with the minimum energy consumption. Therefore, the filtering unit sets the target band at the resonance band, which can screen out the sub-driving signal close to or at the resonance frequency from the first driving signal, and is beneficial for effectively reducing the energy efficiency and power consumption of the active pen.

[0024] Combined with the first aspect, in a possible implementation, the driving device includes a storage unit and a digital-to-analog conversion unit. The storage unit is used to store the PWM array obtained by processing the writing recording of the traditional pen, and the digital-to-analog conversion unit is used to perform analog-to-digital conversion on the PWM array to obtain the driving signal.

[0025] Combined with the first aspect, in a possible implementation, the processing of the writing recording includes at least one of the following: denoising, cropping, splicing, or sampling.

[0026] Combined with the first aspect, in a possible implementation, the driving device includes an audio processing unit, and the audio processing unit is used to process the writing recording of the traditional pen to obtain the driving signal.

[0027] Combined with the first aspect, in a possible implementation, the driving device is used to provide a plurality of different driving signals, and the plurality of driving signals are used to drive the motor device to generate different vibration signals and / or different sound signals.

[0028] Combined with the first aspect, in a possible implementation, different vibration signals and / or different sound signals correspond to different brush types of the active pen.

[0029] Through the technical solution of the embodiments of the present application, setting the corresponding vibration signal and / or sound signal according to different brush types is beneficial for the reduction degree of different brush types of the active pen, thereby improving the user experience.

[0030] In combination with the first aspect, in a possible implementation, the motor device includes: a linear motor. The linear motor has advantages such as fast response speed, delicate vibration, and low power consumption, and thus can be preferably applied to an active pen to provide a relatively accurate and fast feedback response for users.

[0031] In a second aspect, an interaction system is provided, including: an active pen in the first aspect or any possible implementation in the first aspect, and a functional device, where the active pen is used to write on the functional device. Description of the Drawings

[0032] Figure 1 is a schematic structural diagram of an active pen provided by an embodiment of the present application.

[0033] Figure 2 is a schematic structural diagram of another active pen provided by an embodiment of the present application.

[0034] Figure 3 is a schematic diagram of audio signal processing provided by an embodiment of the present application.

[0035] Figure 4 is a schematic structural diagram of another active pen provided by an embodiment of the present application.

[0036] Figure 5 is a schematic structural diagram of yet another active pen provided by an embodiment of the present application.

[0037] Figure 6 is a schematic structural diagram of yet another active pen provided by an embodiment of the present application.

[0038] Figure 7 is a schematic structural diagram of an interaction system provided by an embodiment of the present application.

[0039] Figure 8 is a schematic structural diagram of yet another active pen provided by an embodiment of the present application.

[0040] Figure 9 is a schematic structural diagram of yet another active pen provided by an embodiment of the present application.

[0041] Figure 10 is a schematic flowchart of an active pen driving an X-axis linear motor to generate vibration signals and sound signals provided by an embodiment of the present application. Detailed Embodiments

[0042] Next, the technical solutions in the present application will be described with reference to the accompanying drawings.

[0043] In the description of the embodiments of the present application, unless otherwise specified, " / " means "or". For example, A / B may mean A or B. Herein, "and / or" is merely a description of the association relationship between associated objects, indicating that there can be three relationships. For example, A and / or B may mean: A exists alone, A and B exist simultaneously, and B exists alone.

[0044] In the embodiments of the present application, terms such as "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. Additionally, in the description of the embodiments of the present application, "a plurality" means two or more than two, "at least one" and "one or more" mean one, two or more than two. The singular forms "a", "one", "the", "above-mentioned", "said" and "this" are also intended to include expressions such as "one or more", unless the context clearly indicates otherwise.

[0045] Reference to "one embodiment" or "some embodiments" etc. described in this specification means that a specific feature, structure or characteristic described in connection with that embodiment is included in one or more embodiments of the present application. Thus, statements such as "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments" etc. that appear in different places in this specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "comprise", "include", "have" and their variants all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0046] With the popularization of devices such as tablet computers and graphics tablets, users' requirements for digital writing experiences are increasing day by day, which includes the need for an active pen to simulate the real writing feel. Specifically, users expect that electronic writing tools can not only replace traditional pens and papers, but also retain the real writing experience, especially in scenarios such as note-taking, painting, and signing. This requires restoring the natural interaction feeling of traditional pens and papers through technical means so that users can also obtain an experience similar to traditional writing on electronic devices. At the same time, the rapid development of emerging scenarios such as paperless office and e-education further requires that the active pen be seamlessly connected with traditional tools in terms of functionality and experience to meet users' requirements for efficient and natural writing experiences.

[0047] However, during the current user's use of the active pen, the restoration degree of the traditional pen-and-paper interaction experience is relatively poor. For example, in terms of the sound and vibration feedback during the simulated writing process, it is difficult to reproduce the real feedback generated by the friction between the traditional paper and the pen tip, resulting in a large gap from the actual writing experience.

[0048] In some improved technical solutions, the active pen can provide vibration feedback through a motor device and sound feedback through a sound generating device such as a speaker or a buzzer. However, this method will not only increase the occupied space of the active pen but also may affect the power consumption of the active pen, thus affecting the overall performance and user experience of the active pen.

[0049] In view of this, an embodiment of the present application provides an active pen. Figure 1 It is a schematic structural diagram of an active pen provided by an embodiment of the present application.

[0050] As Figure 1 shown, the active pen 100 includes a driving device 110 and a motor device 120. Among them, the driving device 110 is used to provide a driving signal, and the driving signal includes a signal obtained by processing the writing recording of a traditional pen. The motor device 120 is used to receive the driving signal, and the driving signal is used to drive the motor device to generate a vibration signal and a sound signal, and the vibration signal and the sound signal are used to characterize the brush type of the active pen 100.

[0051] Through the technical solution of the embodiment of the present application, the driving signal corresponding to the writing recording of the traditional pen is used to drive the motor device to vibrate and generate sound. The vibration signal can simulate the touch during the traditional writing process, and the sound signal can restore the friction sound during the traditional writing process, which is beneficial to improving the restoration degree of the active pen to the traditional pen and paper, thereby enhancing the interactivity and user experience of the active pen. At the same time, using the same motor device to vibrate and generate sound simultaneously, without the need for an independent sound generating device such as a speaker to generate sound, can save the internal space of the active pen and reduce the overall power consumption of the active pen.

[0052] In the embodiment of the present application, the traditional pen is a traditional writing tool different from the electronic pen, and the pen types of the traditional pen may include at least one of the following: pencil, marker pen, fountain pen, ballpoint pen, writing brush, crayon, watercolor pen, etc. The embodiment of the present application does not make specific limitations on this.

[0053] In some embodiments, the driving device of the active pen may include a recording unit. The active pen can record the writing process of a traditional pen on paper through the recording unit and form at least one audio signal of the writing recording of the traditional pen. Alternatively, in some other embodiments, in order to save internal space, the active pen may not include a recording unit, but obtain the audio signal acquired by the recording unit from the outside. The active pen may include a storage unit for storing the audio signal. Or, in some other embodiments, the recorded audio signal can be processed through relevant signal processing to form a digital signal convenient for storage, and the storage unit in the active pen can be used to store the digital signal.

[0054] Figure 2 The structural schematic diagram of another active pen provided by the embodiment of the present application is shown.

[0055] As Figure 2 shown, the driving device 110 may include a recording unit 111, an audio processing unit 112, a storage unit 113, and a digital-to-analog conversion unit 114. Among them, the recording unit 111 may include a recorder, which can record the writing recording of the traditional pen to obtain an audio signal. The audio signal can be processed by the subsequent audio processing unit 112 to improve the quality of the audio signal, which is beneficial to forming a driving signal for driving the motor device 120 later.

[0056] Optionally, the audio processing unit 112 may perform at least one of the following processes on the audio signal: denoising, cropping, splicing, or sampling.

[0057] As an example, Figure 3 The schematic diagram of an audio signal processing provided by the embodiment of the present application is shown.

[0058] As Figure 3 shown, after recording the sound effects of different types of traditional pen writings through a recording device (also written as the recording unit 111 above), the audio file (also written as the audio signal above) is then processed. First, the background noise during the recording process can be eliminated, that is, denoising processing. During this process, the denoising processing can remove the abnormally prominent sound parts in the audio, and can reduce the abrupt sounds generated by these noises when driving the motor. Therefore, the denoising processing can make the sound emitted by the active pen more pure and natural when simulating traditional pen and paper writing, increase the writing fluency and the user experience, and thus improve the reduction degree of the active pen 100 to traditional writing actions.

[0059] Cropping and splicing processing can enhance the coherence of the writing sound. During the recording process, unnatural pauses in the sound may occur due to device limitations or improper operations, which will affect the fluency of the writing sound. Through cropping and splicing processing, by editing the recording segments, these unnecessary pauses can be removed, enabling the sound of the brush to transition smoothly during conversion without a sense of breakage. Therefore, cropping and splicing processing is beneficial to the continuity of the sound and can also enhance the authenticity when the active pen 100 simulates traditional writing.

[0060] Sampling processing can adjust the fineness and expressiveness of the sound. Specifically, sampling processing can capture and reproduce the subtle changes in the sound during the writing process by adjusting parameters such as the sampling rate and the number of sampling points. For example, by setting the sampling parameters of the fast Fourier transform (FFT), the detailed performance of the audio and the fineness of the sound can be adjusted. The more FFT sampling points, the richer the relative audio details, which is suitable for effects where vibrations and granularity are more obvious, such as pencils and markers. Therefore, through sampling processing, the active pen 100 is more accurate in restoring the sound characteristics of traditional writing tools.

[0061] Through the technical solution of the embodiments of the present application, by adding a recording unit and an audio processing unit in the active pen, the active pen can independently implement audio recording and the generation of motor drive signals, expanding the simulation scenarios of the active pen. The audio processing unit can not only increase the usage flexibility of the active pen 100 but also enrich the diversity of the writing experience.

[0062] Return to refer to Figure 2 As shown, the storage unit 113 can be connected to the audio processing unit 112. After the audio processing unit 112 processes the audio file / audio signal, it can form a digital signal convenient for storage, such as a PWM array corresponding to a pulse width modulation (PWM) wave signal. The storage unit 113 is, for example, a memory, which can include a volatile memory or a non-volatile memory, or can include both a volatile memory and a non-volatile memory. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable ROM (PROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. The embodiments of the present application do not make specific limitations on this.

[0063] The digital-to-analog conversion unit 114 is connected to the storage unit 113. The digital-to-analog conversion unit 114 may include, for example, a digital-to-analog converter (DAC). After the digital signal stored in the storage unit 113 is converted by the digital-to-analog conversion unit 114, a driving signal for driving the motor device is formed. The driving signal may include, for example, a PWM wave signal.

[0064] Figure 4 Fig. shows a schematic structural diagram of another active pen provided by an embodiment of the present application.

[0065] As Figure 4 shown, in the active pen 100, the driving device 110 may include a storage unit 113 and a digital-to-analog conversion unit 114. The storage unit 113 can be used to store the original audio signal obtained by an external recording device, or can also be used to store the audio signal after processing the original audio signal. The process of processing the original audio signal can refer to the relevant description of the embodiment shown above Figure 3 and will not be elaborated here too much.

[0066] Through the technical solution of this embodiment, the active pen does not need to be built-in with a recording unit, an audio processing unit, etc., which is beneficial to saving the internal space of the active pen and reducing the system complexity. The active pen 100 can quickly drive the motor device through the signal stored in the storage unit to generate vibration signals and sound signals corresponding to the traditional pen recording, and improve the generation speed of the vibration signals and sound signals.

[0067] In some embodiments, by obtaining the writing recordings of different traditional pens on paper, a plurality of different driving signals can be obtained. The plurality of driving signals are used to drive the motor device 120 to generate different vibration signals and / or different sound signals. Optionally, different vibration signals and / or different sound signals may correspond to different brush types of the active pen. Among them, the brush type may correspond to the pen type of the traditional pen, for example, may include pencil, marker pen, fountain pen, ballpoint pen, brush pen, crayon, watercolor pen, etc. In addition, different vibration signals and / or different sound signals may also correspond to different types of writing objects, such as writing paper, cardboard, blackboard, etc. The embodiments of the present application do not limit this.

[0068] During application, the user can input the brush type of the active pen to the functional device. The functional device can send the information of the brush type to the active pen. The active pen calls the corresponding driving signal in its storage unit according to the brush type to drive the motor device to vibrate and make a sound. The brush type is consistent with the traditional pen characterized by the recording signal corresponding to the driving signal.

[0069] In this embodiment, corresponding drive signals can be selectively called according to different brush types to drive the motor device to generate different vibration signals and / or sound signals, which is beneficial to the restoration degree of the active pen 100 for various traditional brush types, thereby further improving the user experience.

[0070] In some embodiments of the present application, after selecting a certain brush type, the active pen can adjust the drive signal of the motor device according to the user's real-time writing state (such as nib pressure, writing speed, etc.), so as to adjust the vibration effect and sound effect of the motor device, so that the feedback of the active pen can be matched with the current writing state in real time, which is beneficial to further improving the user experience of using the active pen.

[0071] Figure 5 It is a schematic structural diagram of another active pen provided by the embodiments of the present application.

[0072] As Figure 5 shown, in addition to the drive device 110 and the motor device 120, the active pen 100 further includes: a pressure detection device 130, and the pressure detection device 130 can be used to detect the nib pressure of the active pen 100 to form a pressure detection signal.

[0073] For example, the pressure detection device 130 may include a pressure sensor, and the pressure sensor can be used to detect the pressure applied to the nib when the user writes with the active pen, so as to generate a pressure detection signal. These pressure detection signals can control the drive signal, so as to further regulate the tactile and sound feedback of the motor device 120.

[0074] In some embodiments, the drive device 110 can adjust the amplitude and / or duty cycle of the drive signal according to the pressure detection signal, so as to adjust the vibration signal and / or sound signal of the motor device.

[0075] In some embodiments, the drive signal provided by the drive device 110 may include a PWM wave signal, and the drive device 110 may include a duty cycle adjustment unit, and the duty cycle adjustment unit is used to adjust the duty cycle of the PWM wave signal according to the pressure detection signal detected by the pressure detection device 130 to adjust the vibration signal and the sound signal.

[0076] Figure 6 It is a schematic structural diagram of another active pen provided by the embodiments of the present application.

[0077] As Figure 6As shown, in the active pen 100, the driving device 110 may include a storage unit 113, a duty cycle adjustment unit 115, and a digital-to-analog conversion unit 114. Among them, the storage unit 113 may store a PWM array corresponding to the recording signal. The duty cycle adjustment unit 115 may adjust the duty cycle of the PWM array. After the adjusted PWM array is input to the digital-to-analog conversion unit 114 and undergoes digital-to-analog conversion, a PWM wave signal is obtained to drive the motor device 120 to generate a vibration signal and a sound signal.

[0078] Exemplarily, in Figure 6 the embodiment shown, the duty cycle adjustment unit 115 is located between the storage unit 113 and the digital-to-analog conversion unit 114, and the duty cycle adjustment unit 115 may adjust the duty cycle of the PWM array (i.e., the digital signal). In some other examples, the order of the duty cycle adjustment unit 115 and the digital-to-analog conversion unit 114 in the driving device may be interchanged, that is, the PWM array stored in the storage unit 113 may be first sent to the digital-to-analog conversion unit 114 for digital-to-analog conversion to form a PWM wave, and then the duty cycle adjustment unit 115 adjusts the duty cycle of the PWM wave (i.e., the analog signal).

[0079] Optionally, the vibration intensity of the motor device may be positively correlated with the pressure detection signal. For example, the greater the pressure detection signal, the greater the duty cycle of the PWM wave signal used to drive the motor device.

[0080] In some examples, if the pressure detection signal is within the first preset pressure range, the duty cycle adjustment unit 115 is used to adjust the duty cycle of the PWM wave signal to a first preset value. If the pressure detection signal is within the second preset pressure range, the duty cycle adjustment unit is used to adjust the duty cycle of the PWM wave signal to a first preset value. Among them, the maximum value of the first preset pressure range is less than the minimum value of the second preset pressure range, and the first preset value is less than the second preset value. For example, if the pressure detection signal is between 10g and 400g, the duty cycle of the PWM wave signal can be adjusted to the first preset value. If the pressure detection signal is greater than 400g, the duty cycle of the PWM wave signal can be adjusted to the second preset value, and the second preset value is greater than the first preset value. The settings of these two preset values may be related to the hardware and driving method of the motor device, and the embodiments of the present application do not make specific limitations on this.

[0081] In the embodiments of the present application, by detecting the magnitude of the pressure detection signal, the duty cycle of the drive signal is correspondingly adjusted, thereby realizing the regulation of the vibration signal and the sound signal of the motor device. For example, when the writing pressure of the user is small, the duty cycle is low, thereby generating a gentle vibration and sound; when the writing pressure of the user is large, the duty cycle is high, thereby generating a stronger vibration and sound feedback. Therefore, by hierarchically regulating the pressure detection signal, the reduction degree of the active pen to the traditional pen and paper can be improved, thereby enhancing the user experience.

[0082] In some examples, in addition to the drive device 110, the motor device 120, and the pressure detection device 130, the active pen 100 further includes: a communication device 140. The communication device 140 may include Bluetooth, Bluetooth low energy (BLE), radio frequency (RF), electromagnetic induction, ultrasonic waves, etc., and the present application does not limit this.

[0083] Figure 7 It is a schematic structural diagram of an interaction system provided by an embodiment of the present application. As Figure 7 shown, the interaction system includes an active pen 100 and a functional device 200. Among them, the communication device 140 of the active pen 100 is used to connect with the communication device 210 of the functional device 200. The functional device 200 includes a speed detection device 220, which can be used to detect the writing speed of the active pen 100 on the functional device 200 to obtain a speed detection signal, and the communication device 210 in the functional device 200 can send the speed detection signal to the communication device 140 in the active pen 100.

[0084] In some application scenarios, the active pen 100 provided by the present application can be used in combination with a display device. That is, the functional device 200 in the above embodiments may include a display device.

[0085] Figure 8 It is a schematic structural diagram of another active pen provided by an embodiment of the present application. As Figure 8 shown, the drive device 110 may include a control unit 116. The communication device 140 can receive the speed detection signal sent by the functional device 200 and send the speed detection signal to the control unit 116. The control unit 116 is used to control whether to output a PWM wave signal to the motor device 120 according to the speed detection signal. The control unit 116 may include, for example, a control circuit or a control chip such as a processor, a controller, a microcontroller, etc., and the present application does not limit this.

[0086] In some embodiments, after obtaining the PWM wave signal converted by the digital-to-analog conversion unit 114, the control unit 116 controls whether to send the PWM wave signal to the motor device 120 according to the speed detection signal. In some examples, if the speed detection signal is greater than a preset threshold, such as 3 cm / s, the control unit 116 is configured to output the PWM wave signal to the motor device 120; if the speed detection signal is less than or equal to the preset threshold, the control unit 116 is configured to stop outputting the PWM wave signal to the motor device 120.

[0087] By detecting the speed detection signal, the vibration signal and sound signal of the motor device 120 can be regulated according to different writing speeds. For example, if the function device 200 detects that the speed detection signal is less than or equal to the preset threshold, at this time the speed detection signal is small, for example, the user pauses using the active pen 100 for writing operations, so the active pen stops the motor device 120 from generating vibration signals and sound signals. Therefore, by detecting the speed detection signal, the accuracy of the feedback effect of the active pen 100 can be improved, which is beneficial to enhancing the user experience.

[0088] In some embodiments, the communication device 140 may also be configured to receive the paper type signal sent by the function device 200. As Figure 8 shown, the communication device 140 receives the paper type signal sent by the function device and then sends the paper type signal to the control unit 116. Among them, the paper type signal can be used to characterize the paper type selected by the user on the function device and corresponds to the types of traditional paper, including: printing paper, watercolor paper, sketch paper, rice paper, frosted paper, carbon paper, kraft paper, etc., which are not limited in this application.

[0089] In the above embodiment, the control unit may also be configured to adjust the output interval of multiple sub-drive signals in the time sequence of the drive signal according to the paper type signal received by the active pen 100. The multiple sub-signals are used to drive the motor device 120 in a time-sharing manner. For example, for paper types such as relatively smooth printing paper and carbon paper, a shorter output interval is set to increase the vibration frequency of the pen tip and simulate the smooth feeling of smooth paper. For paper types such as relatively rough sketch paper and frosted paper, a longer output interval is set to reduce the vibration frequency of the pen tip and simulate the friction feeling of rough paper.

[0090] Through the technical solution of the embodiments of the present application, the control unit can adjust the output interval of multiple sub-drive signals, and these signals drive the motor device 120 in a time-sharing manner to simulate different paper writing effects, thereby further improving the feedback effect of the vibration signal and enhancing the interaction authenticity and user experience of the active pen.

[0091] In order to further improve the driving effect of the driving signal on the motor device, in some embodiments, the driving device 110 further includes a filtering unit 117 for filtering the driving signal.

[0092] Figure 9 FIG. 4 is a schematic structural diagram of another active pen provided by an embodiment of the present application. As Figure 9 shown, the filtering unit 117 can be connected between the storage unit 113 and the digital-to-analog conversion unit 114. The filtering unit 117 is used to pass the target sub-driving signal of the driving signal in the frequency domain and filter out sub-driving signals of other frequencies. The frequency range of the target sub-driving signal includes 150 Hz to 20 KHz. The frequency range of the target sub-driving signal can also be referred to as the target frequency band.

[0093] Optionally, when the filtering unit 117 is used to process the digital signal stored in the storage unit 113, the filtering unit 117 can include a digital filter. Alternatively, the filtering unit 117 can also be connected after the digital-to-analog conversion unit 114 for processing analog signals. The filtering unit 117 can include a band-pass filter, a low-pass filter, a high-pass filter, a band-stop filter, etc., and the present application does not limit this.

[0094] In the embodiment of the present application, the motor device 120 filters the driving signals of the low-frequency band and the high-frequency band to obtain the sub-driving signals of the target frequency band. Among them, the low-frequency band can be less than 150 Hz. By filtering the driving signals of the low-frequency band, the vibration signal can be made coherent, the sense of jerk can be reduced, and at the same time, the sound emitted by the motor device 120 can be made more delicate. In addition, the high-frequency band can be greater than 20 KHz. By filtering the driving signals of the high-frequency band, it is beneficial to increase the vibration efficiency of the motor device 120 and save the energy consumption of the active pen. The filtering unit 117 filters the high-frequency signals and the low-frequency signals to retain the sub-driving signals within the above target frequency band range, which is not only beneficial for the motor device 120 to take into account strong vibration effects and sound effects, but also beneficial for reducing the energy consumption of the active pen.

[0095] In some embodiments, the frequency range of the above target frequency band can include: the resonant frequency of the motor device 120.

[0096] At the resonant frequency, the vibration efficiency of the motor device 120 is the highest, and the strongest vibration feedback can be generated with the least energy consumption. Therefore, setting the target frequency band at the resonant frequency band by the filtering unit 117 can screen out sub-driving signals close to or at the resonant frequency from the driving signal, which is beneficial for effectively reducing the energy efficiency and power consumption of the active pen.

[0097] In some embodiments, the driving signal provided to the motor device may include a complementary PWM wave signal that is complementary to the PWM wave signal. The H-bridge circuit in the motor device 120 can be driven by the PWM wave signal and the complementary PWM wave signal with opposite phases. The H-bridge circuit can control the forward and reverse rotation of the DC motor in the motor device 120 and realize the bidirectional flow of current. The combination of the PWM wave signal and the complementary PWM wave signal in the driving signal is conducive to the current flow in only one direction at any time in the switch of the H-bridge circuit, which is conducive to improving efficiency and reducing energy loss.

[0098] As an example but not limitation, the motor device 120 may include: a linear motor, such as an X-axis linear motor, a Z-axis linear motor, etc. The linear motor has the advantages of fast response speed, fine vibration, low power consumption, etc., and can therefore be preferably used in an active pen to provide users with more accurate and fast feedback response.

[0099] In some embodiments, the X-axis linear motor can electromagnetically drive the mass block to reciprocate in a directional direction, thereby generating vibration and sound feedback. Among them, the X-axis refers to the linear vibration direction of the electromagnetically driven mass block. In some embodiments, the X-axis can be parallel to the axial direction of the pen shaft of the active pen, that is, along the length direction of the active pen. When the X-axis linear motor receives a drive signal, the electromagnetic coil generates an alternating magnetic field to drive the mass block to vibrate. This vibration is transmitted to the grip area of ​​the active pen through the motor housing to form tactile feedback. At the same time, by adjusting the amplitude and pulse interval of the drive signal, the X-axis linear motor can generate high-frequency vibrations, which are transmitted to the air through the pen body to form audible sounds to the user, such as simulating the sound of friction between a traditional pen tip and paper.

[0100] Optionally, the X-axis linear motor is disposed in the middle of the pen body of the active pen 100 or near the user's grip area, which is conducive to the effective transmission of vibration signals and sound signals to the user's hands. Since the X-axis linear motor has the characteristic of directional vibration, and the vibration direction is consistent with the axis of the pen body, it can bring high-precision vibration feedback, thereby providing a more realistic writing experience.

[0101] Figure 10 It is a schematic flow chart of an active pen driving an X-axis linear motor to generate vibration signals and sound signals provided in an embodiment of the present application.

[0102] like Figure 10 As shown, the recording signal of the traditional pen is processed to form an audio signal, which can be converted into a corresponding PWM array, and then the PWM array is imported into the BLE master control of the active pen for processing. Optionally, a storage module such as flash can be configured in BLE. The PWM array can be transferred to the BLE flash for the active pen to call.

[0103] In some examples, a functional device (such as a display device, etc.) configured with the active pen can set different brush types for the active pen. The active pen can obtain the brush type through BLE, and by selecting different PWM arrays stored in the flash, the motor device can be switched to generate different vibration and sound feedback effects.

[0104] In another example, the BLE master can use a band-pass filter to filter the low-frequency and high-frequency signals of the PWM array, thereby adjusting the vibration signal and sound signal of the motor device.

[0105] In addition, the BLE master can also obtain the pressure detection signal and / or speed detection signal, and adjust the gain value of the duty cycle of the PWM array through the pressure detection signal and / or speed detection signal, thereby adjusting the vibration signal and sound signal of the motor device.

[0106] In the above embodiments, direct memory access (DMA) can be called to transfer the PWM array to the PWM peripheral to output a complementary PWM wave signal. This complementary PWM wave signal can be used to control the H-bridge of the X-axis motor device, thereby driving the X-axis linear motor to generate vibration signals and sound signals.

[0107] In various embodiments of the present application, the execution order of each process can be determined according to its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0108] The various implementation manners described in this specification can be implemented alone or in combination, and the embodiments of the present application do not limit this.

[0109] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present application.

[0110] In several embodiments provided in this application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of each device in the active pen is only a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces. The indirect couplings or communication connections of devices or units can be in electrical, mechanical or other forms.

[0111] The units described as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0112] In addition, in each embodiment of this application, each functional unit can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0113] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of this application. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks, or optical discs that can store program codes.

[0114] The above is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application, and all should be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

1. An active pen, characterized in that, Comprising: A driving device for providing a driving signal, the driving signal including a signal obtained by processing the writing and recording of a traditional pen; A motor device for receiving the driving signal, the driving signal being used to drive the motor device to generate a vibration signal and a sound signal, the vibration signal and the sound signal being used to characterize the brush type of the active pen.

2. The active pen according to claim 1, characterized in that, The active pen further includes: a pressure detection device for detecting the tip pressure of the active pen to form a pressure detection signal; The driving device is further configured to adjust the driving signal according to the pressure detection signal to adjust the vibration signal and the sound signal generated by the motor device.

3. The active pen according to claim 2, characterized in that, The driving signal includes a PWM wave signal, and the driving device includes a duty cycle adjustment unit for adjusting the duty cycle of the PWM wave signal according to the pressure detection signal to adjust the vibration signal and the sound signal.

4. The active pen according to claim 3, characterized in that, If the pressure detection signal is within a first preset pressure range, the duty cycle adjustment unit is configured to adjust the duty cycle of the PWM wave signal to a first preset value; or If the pressure detection signal is within a second preset pressure range, the duty cycle adjustment unit is configured to adjust the duty cycle of the PWM wave signal to a second preset value; Wherein, the maximum value of the first preset pressure range is less than the minimum value of the second preset pressure range, and the first preset value is less than the second preset value.

5. The active pen according to claim 1, wherein The active pen further includes: a communication device for receiving a speed detection signal sent by a functional device, the speed detection signal being used to characterize the writing speed of the active pen on the functional device; The driving device is further configured to adjust the driving signal according to the speed detection signal to adjust the vibration signal and the sound signal generated by the motor device.

6. The active pen according to claim 5, wherein The driving device includes a control unit for controlling whether to output the driving signal to the motor device according to the speed detection signal to control whether the motor device generates the vibration signal and the sound signal.

7. The active pen according to claim 6, characterized in that, If the speed detection signal is greater than a preset threshold, the control unit is configured to output the driving signal to the motor device; If the speed detection signal is less than or equal to the preset threshold, the control unit is configured to stop outputting the driving signal to the motor device.

8. The active pen according to claim 5, wherein The communication device is further configured to receive a paper type signal sent by the functional device; The driving device is further configured to adjust the driving signal according to the paper type signal to adjust the vibration signal and the sound signal generated by the motor device.

9. The active pen according to claim 8, characterized in that, The control unit in the communication device is further configured to adjust the output interval of multiple sub-driving signals of the driving signal in the time domain according to the paper type signal, and the multiple sub-driving signals are used to drive the motor device in a time-sharing manner.

10. The active pen according to any one of claims 1 to 9, characterized in that, The driving device further includes: a filtering unit for passing a target sub-driving signal of the driving signal in the frequency domain, and the frequency range of the target sub-driving signal includes 150 Hz to 20 KHz.

11. The active pen according to claim 10, wherein The frequency range of the target sub-driving signal includes the resonance frequency of the motor device.

12. The active pen according to any one of claims 1 to 9, characterized in that, The driving device includes a storage unit and a digital-to-analog conversion unit. The storage unit is used to store a PWM array obtained by processing the writing recording of a traditional pen, and the digital-to-analog conversion unit is used to perform digital-to-analog conversion on the PWM array to obtain the driving signal.

13. The active pen according to claim 12, characterized in that, The processing of the writing recording includes at least one of the following: denoising, cropping, splicing, or sampling.

14. The active pen according to any one of claims 1 to 9, characterized in that, The driving device includes an audio processing unit, and the audio processing unit is used to process the writing recording of a traditional pen to obtain the driving signal.

15. The active pen according to any one of claims 1 to 9, characterized in that, The driving device is used to provide a plurality of different driving signals, and the plurality of driving signals are used to drive the motor device to generate different vibration signals and / or different sound signals.

16. The active pen according to claim 15, characterized in that, The different vibration signals and / or the different sound signals correspond to different brush types of the active pen.

17. The active pen according to any one of claims 1 to 9, characterized in that, The motor device includes: a linear motor.

18. An interaction system, characterized in that, Including: An active pen according to any one of claims 1 to 17, and a functional device, the active pen being used for writing on the functional device.

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