Damping device

Abstract

The utility model discloses a damping device and electronic equipment, the damping device is applied to a rear cover of the electronic equipment, the damping device comprises an analog-to-digital converter, a control comparison module and a digital-to-analog converter, the analog-to-digital converter is used for detecting a vibration signal of the rear cover and converting the detected vibration signal into a first digital signal; the control comparison module is used for comparing the voltage of the first digital signal with a preset voltage and outputting a second digital signal when it is judged that the voltage is larger than or equal to the preset voltage, and the second digital signal and the first digital signal are opposite in phase and identical in amplitude; the digital-to-analog converter is used for converting the second digital signal into an analog signal, and the analog signal is used for counteracting the vibration signal. The designed damping device not only can avoid the influence on the design of other elements caused by later adjustment, but also can reduce the influence on audio and enhance the user experience.

Description

TECHNICAL FIELD

[0001] The utility model relates to a circuit technical field, concretely relates to a damping device and electronic equipment. BACKGROUND

[0002] The top speaker of the mobile phone is usually used as a receiver, and the internal space of the mobile phone is used as a speaker cavity to help the sound spread more effectively. However, the sound emitted by the top speaker can cause the flow of air current inside the mobile phone, which is then conducted to the back cover part of the mobile phone, causing the back cover to vibrate. These vibrations not only distort the sound quality, but also affect the handheld experience, making the user feel uncomfortable or affecting the stability of the operation.

[0003] In the prior art, two methods of designing an air flow discharge channel and a closed rear cavity are commonly used to solve the back cover vibration problem. However, these two methods need to be gradually adjusted in the later stage of the project to find the best balance point, and often these adjustments will affect other designs of the mobile phone, resulting in an increase in the complexity of the overall design. SUMMARY

[0004] The embodiments of the present application disclose a damping device and electronic equipment, which can not only avoid the influence of late-stage adjustment on other element designs, but also reduce the influence on audio and enhance the user experience.

[0005] The first aspect of the embodiments of the present application discloses a damping device applied to a back cover of an electronic device, comprising an analog-to-digital converter, a control comparison module, and a digital-to-analog converter, wherein the control comparison module is connected with the analog-to-digital converter and the digital-to-analog converter respectively, and the control comparison module comprises a controller and a comparator, the comparator is connected with the analog-to-digital converter and the controller respectively, and the controller is further connected with the digital-to-analog converter.

[0006] The analog-to-digital converter is used to detect a vibration signal of the back cover and convert the detected vibration signal into a first digital signal.

[0007] The control comparison module is used to compare the voltage of the first digital signal with a preset voltage, output a second digital signal in the case where the voltage is greater than or equal to the preset voltage, and the second digital signal is opposite in phase and identical in amplitude to the first digital signal.

[0008] The digital-to-analog converter is used to convert the second digital signal into an analog signal, and the analog signal is used to offset the vibration signal.

[0009] As an optional implementation, in the first aspect of the embodiments, the control comparison module comprises a controller and a comparator, the comparator is connected with the analog-to-digital converter and the controller respectively, and the controller is further connected with the digital-to-analog converter, wherein,

[0010] The comparator is configured to compare the voltage of the first digital signal with the preset voltage.

[0011] The controller is configured to output a second digital signal when the comparator determines that the voltage is greater than or equal to the preset voltage, and to set the preset voltage.

[0012] As an optional implementation, in the first aspect of the embodiment, the controller is not operated when the comparator determines that the voltage is less than the preset voltage.

[0013] As an optional implementation, in the first aspect of the embodiment, the comparator comprises a non-inverting input end, an inverting input end and an output end, the non-inverting input end of the comparator is connected with the analog-to-digital converter, the inverting input end of the comparator is connected with the controller, and the output end of the comparator is further connected with the controller, wherein:

[0014] The non-inverting input end is configured to receive the first digital signal.

[0015] The inverting input end is configured to receive the preset voltage.

[0016] The output end is configured to output a high level when the voltage of the first digital signal is greater than or equal to the preset voltage, or to output a low level when the voltage of the first digital signal is less than the preset voltage.

[0017] As an optional implementation, in the first aspect of the embodiment, the damping device comprises a power supply, and the power supply is connected with a power supply end of the comparator.

[0018] The power supply is configured to supply power to the comparator.

[0019] As an optional implementation, in the first aspect of the embodiment, the control comparison module further comprises an insulated gate field effect transistor, and the insulated gate field effect transistor is connected with the controller and the analog-to-digital converter respectively,

[0020] The insulated gate field effect transistor is configured to compare the voltage of the first digital signal with the preset voltage.

[0021] The controller is configured to output the second digital signal when the insulated gate field effect transistor determines that the voltage is greater than or equal to the preset voltage.

[0022] As an optional implementation, in the first aspect of the embodiment, the controller is not operated when the insulated gate field effect transistor determines that the voltage is less than the preset voltage.

[0023] As an optional implementation, in the first aspect of the embodiment, the shock-absorbing device comprises a power supply and a load, the insulated gate field effect transistor comprises a source, a gate and a drain, the source is connected with the power supply, the gate is connected with the analog-to-digital converter, and the drain is connected with the load through grounding; wherein,

[0024] the gate is configured to receive the first digital signal;

[0025] the drain is configured to output a high level when the voltage of the first digital signal is greater than the preset voltage, and output a low level when the voltage of the first digital signal is less than the preset voltage.

[0026] As an optional implementation, in the first aspect of the embodiment, the controller comprises an inverter, the controller is connected with the analog-to-digital converter through an input end of the inverter, and is connected with the digital-to-analog converter through an output end of the inverter;

[0027] the controller is configured to control the inverter to output a second digital signal when the high level is received;

[0028] the inverter is configured to convert a high voltage signal of the first digital signal into a low voltage signal, and convert a low voltage signal of the first digital signal into a high voltage signal when the high level is received by the controller.

[0029] The second aspect of the embodiment of the present application discloses an electronic device comprising the shock-absorbing device.

[0030] Compared with the related art, the embodiment of the present application at least has the following beneficial effects:

[0031] The embodiment of the present application discloses a shock-absorbing device and an electronic device, which are applied to a back cover of an electronic device and comprise an analog-to-digital converter, a control comparison module and a digital-to-analog converter, wherein: the analog-to-digital converter is configured to detect a vibration signal of the back cover and convert the detected vibration signal into a first digital signal; the control comparison module is configured to compare the voltage of the first digital signal with a preset voltage and output a second digital signal when it is determined that the voltage is greater than or equal to the preset voltage, the second digital signal being opposite in phase and identical in amplitude to the first digital signal; and the digital-to-analog converter is configured to convert the second digital signal into an analog signal, which is used to offset the vibration signal. The designed shock-absorbing device not only can avoid the influence on the design of other elements caused by later adjustment, but also can reduce the influence on audio and enhance the user experience. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only represent some of the embodiments of the present application, and all other drawings obtained by those of ordinary skill in the art without creative effort based on the drawings are within the scope of protection of the present application.

[0033] Figure 1 A schematic structural diagram of a damping device provided by an embodiment of the present application is shown in FIG. 1.

[0034] Figure 2 A schematic structural diagram of another damping device provided by an embodiment of the present application is shown in FIG. 2.

[0035] Figure 3 A schematic structural diagram of another damping device provided by an embodiment of the present application is shown in FIG. 3.

[0036] Figure 4 A schematic structural diagram of another damping device provided by an embodiment of the present application is shown in FIG. 4.

[0037] Figure 5 A schematic structural diagram of another damping device provided by an embodiment of the present application is shown in FIG. 5.

[0038] Figure 6 A schematic structural diagram of another damping device provided by an embodiment of the present application is shown in FIG. 6.

[0039] Figure 7 A schematic structural diagram of another damping device provided by an embodiment of the present application is shown in FIG. 7. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments only represent some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0041] It should be noted that the terms "first", "second", and "third" in the embodiments of the present application are used to distinguish similar or different objects, and do not represent a specific order of the objects. Understandably, "first", "second", and "third" can be interchanged in a specific order or sequence as allowed, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0042] It should be noted that the terms "comprising" and "having" and any variations thereof in the embodiments of the present application and the accompanying drawings are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but can optionally further include steps or units not listed, or can optionally further include other steps or units inherent to the process, method, product or device.

[0043] When the speaker at the top of the phone is working, the top speaker usually doubles as an earpiece, and uses the internal space of the phone as a speaker cavity to help sound propagate more effectively. However, the sound emitted by the speaker will cause the flow of air currents inside the phone, which will then be conducted to the back cover part of the phone, causing the back cover to vibrate. Especially when playing music or watching movies, the resonance of the back cover can become more obvious due to the vibration of low-frequency sound, which can affect the sound quality performance of the phone, and the back cover vibration not only can cause distortion of the sound quality, but also can affect the handheld experience, making the user feel uncomfortable or affecting the stability of the operation.

[0044] In the prior art, the shell vibration problem usually gradually appears in the middle and late stages of the design of the phone, because the speaker and other audio systems have been debugged at this time, and the influence of air flow and vibration is often truly exposed through actual use scenarios. In order to solve this problem, designers often adopt two main solutions: one is to guide the air flow energy generated by the speaker to the front shell or middle frame area through the design of air flow discharge channels, so as to avoid the direct impact of air flow on the back cover and reduce the resonance phenomenon of the back cover; the second is to design a closed back cavity to isolate the contact between the air flow and the back cover and reduce the vibration caused by the air flow conduction. Although these two methods are effective, they need to be gradually adjusted in the later stage of the project to find the best balance point, and at the same time, these adjustments often affect other design elements of the phone, such as internal space, heat dissipation performance and antenna layout, resulting in an increase in the complexity of the overall design. Since these changes cannot be completely foreseen at the early stage of the project, the design team often needs to find a solution that can control the shell vibration without affecting other functions and performance through repeated debugging and optimization in the later stage.

[0045] The embodiments of the present application disclose a damping device and an electronic device, which can not only avoid the influence on other element designs caused by late-stage adjustment, but also reduce the influence on audio and enhance the user experience, which will be described in detail as follows:

[0046] The damping device disclosed by the embodiments of the present application can be applied to various scenes, including but not limited to the fields of smart phones, smart home devices, industrial equipment and wearable devices.

[0047] In the field of smart phones, it can be applied to high-end flagship phones, so that users can provide clearer and purer audio experience for users whether they are playing high-quality sound, voice calls, or rendering game sound effects, avoiding sound distortion. And it can also effectively enhance the stability of the phone in a violent shaking environment, avoiding the impact of shaking on the phone components, prolonging the service life of the phone.

[0048] In the field of smart home devices, it can be applied to devices including but not limited to smart speakers, home projectors or home theaters, etc. In a home environment, the device is often placed on a desktop or a cabinet, and any vibration or irregular airflow can cause the device shell to vibrate. The damping device can effectively reduce this impact, making the device operate efficiently and stably, while improving the user's audio experience.

[0049] In industrial equipment, the damping device can be applied to high-precision machine equipment including but not limited to robots, automated production lines, aerospace equipment, etc. The application of the damping device can effectively reduce errors caused by vibration and improve the working precision and stability of the equipment. Or it can also be applied to some high-frequency vibrating devices such as laser cutting machines and numerical control machine tools. The damping device can reduce vibration conduction and avoid affecting the precision operation of the equipment, while enhancing its working life and reliability.

[0050] In the field of wearable devices, it can be applied to devices including but not limited to smart watches and smart earphones, etc. They are small in size, compact in structure and limited in internal space. The application of the damping device can effectively reduce the impact of external vibration on internal components of the device, protect sensitive components, and also avoid the impact and layout of other component designs when designing the back cover shell vibration compensation.

[0051] Please refer to Figure 1 , Figure 1 A schematic structural diagram of a damping device provided by the embodiment of the application is applied to the back cover of an electronic device. The structural diagram includes an analog-to-digital converter 11, a control comparison module 12 and a digital-to-analog converter 13. The control comparison module 12 is connected with the analog-to-digital converter 11 and the digital-to-analog converter 13 respectively, wherein:

[0052] The analog-to-digital converter 11 is used to detect the vibration signal of the back cover and convert the detected vibration signal into a first digital signal;

[0053] The control comparison module 12 is used to compare the voltage of the first digital signal with a preset voltage and output a second digital signal in the case where the voltage is greater than or equal to the preset voltage. The second digital signal is opposite in phase and identical in amplitude to the first digital signal;

[0054] The digital-to-analog converter 13 is configured to convert the second digital signal into an analog signal, and the analog signal is used to offset the vibration signal.

[0055] The shock-absorbing device is applied to the back cover of an electronic device. When a certain degree of back cover vibration signal is detected, the detected vibration signal is converted to obtain an analog signal with the same amplitude and opposite phase of the detected shell vibration, which is used to offset the vibration signal on the back cover. This device does not need to be adjusted gradually in the later stage of the project to find the best balance point as in the prior art, so it will not affect other aspects of the design of the electronic terminal in the later adjustment process, reducing the complexity of the overall design. In addition, the shock-absorbing device automatically detects and offsets the back cover shell vibration, which not only improves the audio experience of the user when using the device, but also avoids excessive shell vibration affecting the handheld experience of the terminal device.

[0056] The main function of the analog-to-digital converter 11 is to convert continuous analog signals into discrete digital signals. The main working steps are sampling, quantization and coding. Sampling refers to sampling the amplitude value of the analog signal at a specific time interval; quantization refers to converting the sampled signal amplitude value into the closest discrete value, which involves mapping the signal to a limited digital range; coding refers to converting the quantized value into a binary number to make it the final digital signal output.

[0057] There are many types of analog-to-digital converters that can be selected according to actual needs, such as R-2R ladder analog-to-digital converter, weighted resistance analog-to-digital converter, parallel analog-to-digital converter, successive approximation analog-to-digital converter, delta-sigma analog-to-digital converter, current-mode analog-to-digital converter, integrated analog-to-digital converter, pulse width adjustment analog-to-digital converter, etc., but not limited to. The R-2R ladder analog-to-digital converter has the characteristics of simplicity and low cost, and is suitable for medium and low resolution applications. The weighted resistance analog-to-digital converter has the characteristic of simple principle and is suitable for low resolution applications. The parallel analog-to-digital converter has the characteristic of high-speed conversion and is suitable for high-frequency applications. The successive approximation analog-to-digital converter has medium and high precision and is suitable for most applications. The delta-sigma analog-to-digital converter has the characteristics of high precision and low distortion and is suitable for high demand applications. The current-mode analog-to-digital converter has the characteristics of high speed and precision and is suitable for high-speed applications. The integrated analog-to-digital converter has the characteristics of low cost and small size and is suitable for embedded applications. The pulse width adjustment analog-to-digital converter has the characteristics of simplicity and low cost and is suitable for low precision applications.

[0058] The function of the digital-to-analog converter 13 is to convert discrete digital signals (usually binary digits) into continuous analog signals. Its main working steps are decoding and smoothing. Decoding refers to converting the input digital value into voltage or current representing the signal amplitude; smoothing refers to smoothing the output signal to eliminate the step effect caused by the discretization of the digital signal, which is usually achieved through a low-pass filter.

[0059] There are many types of digital-to-analog converters (DACs), which can be selected according to actual needs, such as R-2R trapezoidal DACs, weighted resistor DACs, parallel DACs, successive approximation DACs, Δ-Σ DACs, current-mode DACs, and integrated DACs, but not limited to these.

[0060] For example, the analog-to-digital converter 11 detects a vibration signal from the back cover, which is typically an analog signal. The analog-to-digital converter 11 converts this analog signal into a digital signal; that is, it converts the continuously changing voltage value of the vibration signal into discrete digital values, i.e., a first digital signal. After the control comparison module 12 receives this first signal, it compares the voltage value of the first digital signal with a preset voltage, which can be a pre-designed threshold. If the voltage value of the first digital signal is greater than or equal to the preset voltage, the control comparison module 12 outputs a second digital signal. This second digital signal has the opposite phase and the same amplitude as the first digital signal. The digital-to-analog converter 13 receives the second digital signal and converts it into an analog signal. This analog signal corresponds to the voltage or current signal of the original vibration signal and can interact with the original vibration signal at a physical level. The key point in this process is that the second digital signal has the opposite phase and the same amplitude as the original vibration signal; therefore, when the two signals are superimposed, they cancel each other out.

[0061] In some embodiments, the control comparison module includes a controller and a comparator; see [link to relevant documentation]. Figure 2 , Figure 2 This is a schematic structural diagram of another shock absorption device provided in an embodiment of this application. The diagram includes an analog-to-digital converter 21, a comparator 24, a controller 25, and a digital-to-analog converter 23. The control and comparison module includes the comparator 24 and the controller 25. The comparator 24 is connected to both the analog-to-digital converter 21 and the controller 25. The controller 25 is also connected to the digital-to-analog converter 23.

[0062] The comparator 24 is used to compare the voltage of the first digital signal with a preset voltage;

[0063] The controller 25 is configured to output the second digital signal when the comparator determines that the voltage is greater than or equal to the preset voltage, and to set the preset voltage.

[0064] Among them, the comparator 24 is an electronic component, the main function is to compare the size of two input voltages, and output a binary signal according to the comparison result, which is usually high or low, and its basic working principle is that when the voltage on its two input terminals changes, when the voltage of the positive input terminal is greater than that of the negative input terminal, the output of the comparator is high, otherwise, when the voltage of the negative input terminal is greater than that of the positive input terminal, the output is low.

[0065] The preset voltage is a threshold of the shell vibration size acceptable to the user evaluated according to the simulation results in the early stage. When the shell vibration size exceeds the threshold of the shell vibration size acceptable to the user, it is considered that the shell vibration will affect the user, and the rear cover shell vibration needs to be processed. When the shell vibration size is less than the threshold of the shell vibration size acceptable to the user, it is considered that the user shell vibration will not affect the user, and the shell vibration can not be processed in this case.

[0066] In an embodiment, when the voltages of the positive and negative input terminals of the comparator are equal, hysteresis design can be used. Hysteresis sets different rising and falling thresholds, so that the comparator can avoid frequent output switching when the input voltage is close, thereby improving output stability, noise immunity and system reliability.

[0067] Among them, the rising threshold refers to when the input voltage rises from a lower level, only when the input voltage exceeds a rising threshold, the output of the comparator will switch from low to high; The falling threshold refers to when the input voltage falls from a higher level, only when the input voltage falls to another lower threshold, the output of the comparator will switch from high to low. The difference between the two thresholds (called hysteresis width) can be adjusted according to the requirements of the application, so as to avoid the output instability phenomenon when the input voltage is close.

[0068] When selecting a comparator, you can choose according to your actual needs, for example, basic comparator, hysteresis comparator, window comparator, differential comparator or integrated comparator, etc., which is not specifically limited here.

[0069] Among them, the basic comparator is the simplest comparator type, which directly compares two input voltages, and it has no built-in hysteresis mechanism, and the output is very sensitive to the change of the input voltage. The hysteresis comparator adds a hysteresis feature to the basic comparator. When the input signal fluctuates slightly, the comparator will not frequently change the output state, thereby improving the noise immunity, and is suitable for more complex or noisy environments. The window comparator is used to detect whether the input voltage is within the preset voltage range. Usually, two threshold values are set, an upper threshold value and a lower threshold value. When the input voltage is between the two threshold values, the output state of the comparator is high. When the input voltage exceeds this range, the output is low. This comparator monitors whether the signal is within a specific voltage range. The differential comparator is used to compare the difference between two input voltages, rather than simply comparing their sizes. When the input signal may come from different signal sources, the differential comparator can accurately compare the difference between the two signals. The integrated comparator integrates multiple functions. In addition to the basic comparison function, it may also integrate power management, signal processing, protection circuit, etc. Common integrated comparators include LM393, LM339, LM393, etc. You can choose according to actual needs.

[0070] The controller 25 refers to an electronic device or software used to regulate, manage and optimize a certain system or process. Its main function is to process according to the input signal and output control signal according to a certain control algorithm, so as to affect the running state of the system or device, in order to achieve the desired goal, the input signal can be sensor data, user set value, etc. Not limited here.

[0071] The working principle of the controller is usually based on a feedback control system, which usually includes four steps: signal acquisition, signal processing and comparison, control algorithm calculation, and output control signal.

[0072] Among them, information acquisition refers to obtaining the state information of the system through sensors or input devices. These information can be temperature, pressure, speed, current, position, etc. Physical quantities, but also other external inputs such as time, user input, etc. Signal processing and comparison refer to comparing the collected input signal with the set target value to calculate the error. Control algorithm calculation refers to calculating the control signal to be output according to the input error using a certain control algorithm. Output control signal refers to the controller outputting control signal according to the calculation result, driving the executed device to perform corresponding operation, and finally achieving the set target.

[0073] In selecting a controller, you can choose according to actual needs, for example, fuzzy controller, adaptive controller, switch controller, etc. Not limited here.

[0074] Exemplarily, the analog-to-digital converter 21 detects the vibration signal from the back cover, which is usually an analog signal, and converts the analog signal into a digital signal, i.e., the analog-to-digital converter 21 converts the voltage value of the continuously changing vibration signal into a discrete digital value, i.e., a first digital signal; after the comparator 24 receives the first digital signal, the voltage value of the first digital signal is compared with a preset voltage, which can be a preset voltage obtained by a user according to simulation results, and the preset voltage is artificially input by the controller. The controller 25 will output a second digital signal according to the comparison result of the comparator 24, i.e., in the case that the voltage value of the first digital signal is greater than or equal to the preset voltage. The second digital signal is opposite in phase to the first digital signal and has the same amplitude. When the digital-to-analog converter 23 receives the second digital signal and converts it into an analog signal, the analog signal corresponds to the voltage or current signal of the original vibration signal and can interact with the original vibration signal at the physical layer. Since the second digital signal is opposite in phase to the original vibration signal and has the same amplitude, when the two signals are superimposed together, they will cancel each other out to achieve the purpose of canceling the back cover shell vibration.

[0075] In an embodiment, when the comparator determines that the voltage of the first digital signal is less than the set preset voltage, the controller does not work.

[0076] Exemplarily, the analog-to-digital converter 21 detects the vibration signal from the back cover, which is usually an analog signal, and converts the analog signal into a digital signal, i.e., the analog-to-digital converter 21 converts the voltage value of the continuously changing vibration signal into a discrete digital value, i.e., a first digital signal; after the comparator 24 receives the first digital signal, the voltage value of the first digital signal is compared with a preset voltage, which can be a preset voltage obtained by a user according to simulation results, and the preset voltage is artificially input by the controller. The controller 25 will output a second digital signal according to the comparison result of the comparator 24, i.e., in the case that the voltage value of the first digital signal is greater than or equal to the preset voltage. The second digital signal is opposite in phase to the first digital signal and has the same amplitude. When the digital-to-analog converter 23 receives the second digital signal and converts it into an analog signal, the analog signal corresponds to the voltage or current signal of the original vibration signal and can interact with the original vibration signal at the physical layer. Since the second digital signal is opposite in phase to the original vibration signal and has the same amplitude, when the two signals are superimposed together, they will cancel each other out to achieve the purpose of canceling the back cover shell vibration.

[0077] In some embodiments, the comparator includes a non-inverting input end, an inverting input end, and an output end, please refer to Figure 3 , Figure 3Another shock-absorbing device provided by the embodiment of the present application is shown schematically in the structure diagram. The comparator 34 comprises a non-inverted input end 341, an inverted input end 342 and an output end 343. The non-inverted input end 341 of the comparator is connected with the analog-digital converter 31. The inverted input end 342 of the comparator is connected with the controller 35. The output end 343 of the comparator is also connected with the controller 35. Wherein:

[0078] The non-inverted input end 341 is used for receiving the first digital signal.

[0079] The inverted input end 342 is used for receiving the preset voltage.

[0080] The output end 343 is used for outputting high level when the voltage of the first digital signal is greater than or equal to the preset voltage, or is used for outputting low level when the voltage of the first digital signal is less than the preset voltage.

[0081] Exemplarily, the analog-digital converter 31 detects the vibration signal from the back cover, which is usually an analog signal. The analog-digital converter 31 converts the analog signal into a digital signal, i.e. the analog-digital converter 31 converts the voltage value of the continuously changing vibration signal into a discrete digital value, i.e. the first digital signal. The first digital signal is input into the comparator through the non-inverted input end 341 of the comparator. Meanwhile, the inverted input end 342 of the comparator also receives the preset voltage from the controller. The comparator 34 compares the voltage of the first digital signal with the preset voltage. When the voltage of the first digital signal is greater than or equal to the preset voltage, the output end 343 of the comparator outputs high level. When the voltage of the first digital signal is less than the preset voltage, the output end 343 of the comparator outputs low level. The controller 35 is connected with the output end 343 of the comparator. When the controller 35 receives high level, the controller 35 outputs the second digital signal. When the controller 35 receives low level, the controller 35 does not work.

[0082] In an embodiment, the shock-absorbing device further comprises a power supply. Please refer to Figure 3 The power supply 36 is connected with the power supply end 344 of the comparator, and supplies power for the comparator when the comparator 34 works.

[0083] It can be understood that the ground end 345 of the comparator is grounded.

[0084] Optionally, the power supply can also be integrated in the controller. The comparator can obtain power supply by being connected with the controller. This method can increase the space utilization, and simplify the structural design of the shock-absorbing device.

[0085] In some embodiments, an insulated gate field effect transistor can be used instead of the comparator, please refer to Figure 4 , Figure 4 Another shock-absorbing device provided by the embodiment of the application is shown in a schematic structural diagram. The structural diagram comprises an analog-to-digital converter 41, an insulated gate field effect transistor 44, a controller 45, and a digital-to-analog converter 43. The control comparison module comprises the insulated gate field effect transistor 44 and the controller 45. The insulated gate field effect transistor 44 is connected to the analog-to-digital converter 41 and the controller 45 respectively. The controller 45 is further connected to the digital-to-analog converter 43.

[0086] The insulated gate field effect transistor 44 is configured to compare the voltage of the first digital signal with a preset voltage.

[0087] The controller 45 is configured to output a second digital signal when the insulated gate field effect transistor determines that the voltage is greater than or equal to the preset voltage.

[0088] Optionally, the preset voltage is a vibration size threshold value that a user can accept according to simulation results by an experimenter. The vibration size threshold value can be a switching voltage of the insulated gate field effect transistor, or a source voltage of the insulated gate field effect transistor minus a threshold voltage. A suitable insulated gate field effect transistor and connection mode can be selected according to actual conditions.

[0089] An insulated gate field effect transistor (IGFET), also known as a metal-oxide-semiconductor field-effect transistor (MOSFET), is a field effect transistor with a gate insulating structure, which is widely used in digital circuits, analog circuits, and power electronics, especially in switching power supplies, amplifiers, logic circuits, and other fields.

[0090] The working principle of the insulated gate field effect transistor is based on the control of the flow of current by an electric field. When there is no voltage at the gate, there is no current flow between the source and the drain. When a voltage is applied to the gate, an electric field is formed in the semiconductor region below the gate, thereby changing the conductivity of the semiconductor region. If the gate voltage is greater than a certain preset voltage, a conductive path will be formed in the semiconductor region, allowing current to flow from the source to the drain. When the gate voltage is less than the preset voltage, the semiconductor region is cut off, and the current cannot flow.

[0091] When selecting an insulated gate field effect transistor, one can select according to actual needs, for example, N-channel MOSFET (NMOS), P-channel MOSFET (PMOS), Enhancement-mode MOSFET, Depletion-mode MOSFET, Complementary Metal Oxide Semiconductor (CMOS), Power MOSFET, etc.

[0092] Among them, the source and drain of N-channel MOSFET are composed of N-type semiconductor material, which has higher conductivity and lower on-resistance. The source and drain of P-channel MOSFET are composed of P-type semiconductor material, and the base is N-type material, which usually has poor conductivity, and is often used with NMOS to form a Complementary Metal Oxide Semiconductor (CMOS) circuit. Enhancement-mode MOSFET only allows current to flow when a sufficient gate voltage is applied, which is "enhanced" to allow current to flow. Depletion-mode MOSFET has a certain conductivity without a gate voltage, and when a gate voltage is applied, the conductivity of the channel is "depleted" or "weakened", thereby reducing or cutting off the current flow. Complementary Metal Oxide Semiconductor (CMOS) consumes almost no current in static state, and has very high energy efficiency. Power MOSFET has lower on-resistance and higher current carrying capacity, and can withstand higher power load.

[0093] Exemplarily, the analog-to-digital converter 41 detects a vibration signal from the back cover, which is usually an analog signal, and converts the analog signal into a digital signal, i.e., the analog-to-digital converter 41 converts the voltage value of the continuously changing vibration signal into a discrete digital value, i.e., a first digital signal; the analog-to-digital converter 41 detects a vibration signal from the back cover, which is usually an analog signal, and converts the analog signal into a digital signal, i.e., the analog-to-digital converter 41 converts the voltage value of the continuously changing vibration signal into a discrete digital value, i.e., a first digital signal; after the insulated gate field effect transistor 44 receives the first digital signal, the voltage value of the first digital signal is compared with a preset voltage, which can be a preset voltage obtained by a user according to simulation results, and a suitable insulated gate field effect transistor is selected according to the preset voltage, so that the switching voltage of the insulated gate field effect transistor meets the preset voltage, and the controller 45 will output a second digital signal according to the comparison result of the insulated gate field effect transistor 44, i.e., in the case where the voltage value of the first digital signal is greater than or equal to the preset voltage. The second digital signal is opposite in phase to the first digital signal but has the same amplitude. When the digital-to-analog converter 43 receives the second digital signal and converts it into an analog signal, the analog signal corresponds to the voltage or current signal of the original vibration signal and can interact with the original vibration signal at the physical layer. Since the second digital signal is opposite in phase to the original vibration signal but has the same amplitude, when the two signals are superimposed, they will cancel each other out to achieve the purpose of canceling the back cover vibration.

[0094] In some embodiments, in the case where the insulated gate field effect transistor determines that the voltage is less than the preset voltage, the controller does not work.

[0095] Exemplarily, the analog-to-digital converter 41 detects a vibration signal from the back cover, which is usually an analog signal, and converts the analog signal into a digital signal, i.e., the analog-to-digital converter 41 converts the voltage value of the continuously changing vibration signal into a discrete digital value, i.e., a first digital signal; after the insulated gate field effect transistor 44 receives the first digital signal, the voltage value of the first digital signal is compared with a preset voltage, which is obtained through simulation experiments, and in this example, the preset voltage is equal to the size of the source voltage of the insulated gate field effect transistor minus the switching voltage. The controller 45 will not work according to the comparison result of the insulated gate field effect transistor 44, i.e., in the case where the voltage value of the first digital signal is less than the preset voltage. This is because in this case, the preset voltage is the threshold value of the maximum shell vibration size that the user can accept, and when the shell vibration is less than the threshold value, it means that the shell vibration does not have too much impact on the user, and the controller can not work. This setting not only makes the shock absorption setting more intelligent, but also reduces the power consumption of the shock absorption device.

[0096] In some embodiments, the damping device further comprises a power supply and a load, please refer to Figure 5 , Figure 5 Another schematic structural diagram of a damping device provided by the embodiments of the present application comprises an analog-to-digital converter 51, an insulated gate field effect transistor 54, a controller 55, a digital-to-analog converter 53, a power supply 56, and a load 57. The insulated gate field effect transistor 54 comprises a source electrode 541, a gate electrode 542, and a drain electrode 543. The source electrode 541 is connected to the power supply 56, the gate electrode 542 is connected to the analog-to-digital converter 51, the drain electrode 543 is connected to the ground through the load 57, and the controller 55 is further connected to the digital-to-analog converter 53.

[0097] The gate electrode 542 is configured to receive the first digital signal.

[0098] The drain electrode 543 is configured to output a high level when the voltage of the first digital signal is greater than the preset voltage, and output a low level when the voltage of the first digital signal is less than the preset voltage.

[0099] For example, the analog-to-digital converter 51 detects a vibration signal from the back cover, which is usually an analog signal. The analog-to-digital converter 51 converts the analog signal into a digital signal, i.e., the analog-to-digital converter 51 converts the voltage value of the continuously changing vibration signal into a discrete digital value, i.e., a first digital signal. The first digital signal is input into the insulated gate field effect transistor 54 through the gate electrode 542 of the insulated gate field effect transistor 54. The insulated gate field effect transistor 54 compares the voltage of the first digital signal received by the gate electrode 542 with a preset voltage, which is obtained through simulation experiments. In this example, the preset voltage is equal to the source voltage of the insulated gate field effect transistor minus the size of the switching voltage. When the voltage of the first digital signal is greater than or equal to the preset voltage, the source electrode and the drain electrode of the insulated gate field effect transistor are not conductive, at which time the current between the drain electrode 543 and the source electrode 541 is disconnected, and the drain electrode 543 outputs a high level close to the voltage of the power supply 56. When the voltage of the first digital signal is less than the preset voltage, i.e., when the voltage received by the gate electrode 542 is lower than the preset voltage, the current flows between the source electrode 541 and the drain electrode 543, and the drain electrode 543 outputs a low level close to the ground voltage. The controller 55 is connected to the drain electrode of the insulated gate field effect transistor 54. When the controller 55 receives a high level, the controller 55 outputs a second digital signal. When the controller 55 receives a low level, the controller 55 does not work.

[0100] In some embodiments, the controller further comprises an inverter, please refer to Figure 6 , Figure 6Another schematic structural diagram of a damping device provided by an embodiment of the present application is shown in the figure, which includes an analog-to-digital converter 61, a comparator 64, a controller 65, and a digital-to-analog converter 63. The comparator 64 includes a non-inverting input terminal 641, an inverting input terminal 642, and an output terminal 643. The non-inverting input terminal 641 of the comparator is connected to the analog-to-digital converter 61. The inverting input terminal 642 of the comparator is connected to the controller 65. The output terminal 643 of the comparator is also connected to the controller 65. The controller 65 includes an inverter 651. The controller 65 is connected to the analog-to-digital converter 61 through the input terminal of the inverter 651, and is connected to the digital-to-analog converter 63 through the output terminal of the inverter 651.

[0101] The controller 65 controls the inverter 651 to output a second digital signal when the high level is received.

[0102] The inverter 651 is configured to convert a high-voltage signal of the first digital signal into a low-voltage signal, and convert a low-voltage signal of the first digital signal into a high-voltage signal when the high level is received by the controller 65.

[0103] An inverter is a common basic logic gate circuit in digital circuits, which is usually composed of one or more transistors, logic gates, and appropriate circuit configurations, and can realize the logical inversion of an input signal, that is, when an inverter receives an input signal, if the input is a high level (logic 1), the output is a low level (logic 0); if the input is a low level (logic 0), the output is a high level (logic 1).

[0104] When selecting an inverter, one can choose according to one's own actual needs, such as CMOS inverters, TTL inverters, ECL inverters, NAND and NOR inverters, etc.

[0105] Among them, the CMOS inverter realizes the logical inversion by using complementary N-channel MOS and P-channel MOS transistors, has high noise tolerance and high input impedance. The TTL inverter is a circuit that realizes logical inversion by using bipolar transistors and related electronic components, and has fast response speed. The ECL inverter is a circuit based on emitter coupled logic, which has the characteristics of fast response and low delay, but has high power consumption and needs stronger heat dissipation measures. The NAND and NOR inverters are realized by combining basic NAND or NOR gates, which are more efficient in some specific circuit designs.

[0106] Exemplarily, the analog-to-digital converter 61 detects a vibration signal from the back cover, which is usually an analog signal, and converts the analog signal into a digital signal, i.e., the analog-to-digital converter 61 converts the voltage value of the continuously changing vibration signal into a discrete digital value, i.e., a first digital signal; the first digital signal is input to the comparator through the non-inverting input end 641 of the comparator, and the inverting input end 642 of the comparator also receives a preset voltage from the controller, the comparator 64 compares the voltage of the first digital signal with the preset voltage, in the case that the voltage of the first digital signal is greater than or equal to the preset voltage, the output end 643 of the comparator outputs a high level, in the case that the voltage of the first digital signal is less than the preset voltage, the output end 643 of the comparator outputs a low level, the controller 55 is connected to the output end 643 of the comparator, in the case that the controller 65 receives a high level, the controller 65 controls the inverter 651 to convert the high voltage signal of the first digital signal received from the analog-to-digital converter 61 into a low voltage signal, and convert the low voltage signal of the first digital signal into a high voltage signal, at this time, the inverter 651 outputs a second digital signal.

[0107] Please refer to Figure 7 , Figure 7 A schematic diagram of an electronic device is provided for the embodiments of the present application, which comprises an electronic device 70 and any shock-absorbing device 71 described above.

[0108] It should be understood that the description of “one embodiment” or “an embodiment” throughout the specification means that the specific feature, structure or characteristic related to the embodiment is included in at least one embodiment of the present application. Therefore, “in one embodiment” or “in an embodiment” appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in any suitable manner in one or more embodiments. Those skilled in the art should also know that the embodiments described in the specification are optional embodiments, and the actions and modules involved are not necessarily required by the present application.

[0109] In various embodiments of the present application, it should be understood that the size of the serial number of the above processes does not mean the inevitable sequence of execution, and the execution sequence of the processes should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0110] The units described above as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e., can be located in one place, or can be distributed to multiple network units. According to actual needs, part or all of the units can be selected to achieve the purpose of the embodiments of the present application.

[0111] In addition, each of the functional units in the embodiments of the present application can be integrated in one processing unit, or each unit can exist alone physically, or two or more units can be integrated in one unit. The integrated unit can be implemented in the form of hardware, or in the form of a software functional unit.

[0112] The term "and / or", used herein only describes an associated relationship, which means that there can be three relationships, for example, object A and / or object B, which means that object A exists alone, object A and object B exist together, and object B exists alone.

[0113] It should be noted that the terms "comprising", "containing", or any other variant thereof, are intended to cover a non-exclusive inclusion, so that a process, method, article, or apparatus that comprises a list of elements not only includes those elements, but also includes other elements not expressly listed, or other elements inherent in such process, method, article, or apparatus. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0114] The methods disclosed in the several method embodiments of the present application can be combined arbitrarily without conflict to obtain new method embodiments.

[0115] The features disclosed in the several product embodiments of the present application can be combined arbitrarily without conflict to obtain new product embodiments.

[0116] The features disclosed in the several method or device embodiments of the present application can be combined arbitrarily without conflict to obtain new method or device embodiments.

[0117] The shock-absorbing device disclosed in the embodiments of the present application is described in detail above, and the principles and implementation modes of the present application are described by applying specific examples. The above description of the embodiments is only used to help understand the method of the present application and its core idea. Meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A shock absorbing device, characterized in that The application relates to a rear cover applied to an electronic device, wherein the shock absorption device comprises an analog-to-digital converter, a control comparison module and a digital-to-analog converter, the control comparison module is connected with the analog-to-digital converter and the digital-to-analog converter respectively, wherein: The analog-to-digital converter is used for detecting a vibration signal of the rear cover and converting the detected vibration signal into a first digital signal; The control comparison module is used for comparing the voltage of the first digital signal with a preset voltage, outputting a second digital signal in the case that the voltage is greater than or equal to the preset voltage, and the second digital signal is opposite in phase and identical in amplitude to the first digital signal; The digital-to-analog converter is used for converting the second digital signal into an analog signal, and the analog signal is used for offsetting the vibration signal.

2. The shock absorbing device of claim 1, wherein The control comparison module comprises a controller and a comparator, the comparator is connected with the analog-to-digital converter and the controller respectively, and the controller is further connected with the digital-to-analog converter, wherein: The comparator is used for comparing the voltage of the first digital signal with the preset voltage; The controller is used for outputting the second digital signal in the case that the comparator judges that the voltage is greater than or equal to the preset voltage, and is used for setting the preset voltage.

3. The shock absorbing device of claim 2, wherein, In the case that the comparator judges that the voltage is less than the preset voltage, the controller does not work.

4. The shock absorbing device of claim 2, wherein The comparator comprises a non-inverting input end, an inverting input end and an output end, the non-inverting input end of the comparator is connected with the analog-to-digital converter, the inverting input end of the comparator is connected with the controller, and the output end of the comparator is further connected with the controller, wherein: The non-inverting input end is used for receiving the first digital signal; The inverting input end is used for receiving the preset voltage; The output end is used for outputting a high level in the case that the voltage of the first digital signal is greater than or equal to the preset voltage, or is used for outputting a low level in the case that the voltage of the first digital signal is less than the preset voltage.

5. The shock absorbing device of claim 4, wherein, The shock absorption device comprises a power supply, and the power supply is connected with a power supply end of the comparator; The power supply is used for supplying power for the comparator.

6. The shock absorbing device of claim 2, wherein The control comparison module further comprises an insulated gate field effect transistor, the insulated gate field effect transistor is connected with the controller and the analog-to-digital converter respectively, The insulated gate field effect transistor is used for comparing the voltage of the first digital signal with the preset voltage; The controller is used for outputting the second digital signal in the case that the insulated gate field effect transistor judges that the voltage is greater than or equal to the preset voltage.

7. The shock absorbing device of claim 6, wherein In the case that the insulated gate field effect transistor judges that the voltage is less than the preset voltage, the controller does not work.

8. The shock absorbing device of claim 6, wherein, The shock absorption device comprises a power supply and a load, the insulated gate field effect transistor comprises a source electrode, a gate electrode and a drain electrode, the source electrode is connected with the power supply, the gate electrode is connected with the analog-to-digital converter, and the drain electrode is connected with the ground through the load; wherein: The gate electrode is used for receiving the first digital signal; The drain is configured to output a high level when a voltage of the first digital signal is greater than the preset voltage, and output a low level when the voltage of the first digital signal is less than the preset voltage.

9. A shock absorbing device according to claim 4 or 8, characterised in that The controller comprises an inverter, and the controller is connected with the analog-to-digital converter through an input end of the inverter and connected with the digital-to-analog converter through an output end of the inverter. The controller controls the inverter to output a second digital signal when the high level is received. The inverter is configured to convert a high voltage signal of the first digital signal into a low voltage signal and convert a low voltage signal of the first digital signal into a high voltage signal when the high level is received by the controller.

10. An electronic device, comprising: A shock absorbing device comprising any one of the devices of claims 1-9.

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