Vibration feedback providing device and control method thereof

Abstract

The invention provides a vibration feedback providing device and a control method thereof. The vibration feedback providing device comprises a substrate, a frame and a plurality of displacement recovery devices, one end of each displacement recovery device is connected with the frame, and the other end of each displacement recovery device is connected with the substrate; one surface of the substrate is a user operation surface, and the other surface of the substrate comprises at least one driving coil, at least one induction coil, a controller and a driver; the frame further comprises a first magnet set corresponding to the driving coil and a second magnet set corresponding to the induction coil. The controller processes a signal obtained by the induction coil to drive the vibration feedback device so as to achieve a reliable vibration suppression effect.

Description

Technical Field

[0001] The present invention relates to the technical field of vibration control, and in particular to a vibration feedback device and a control method thereof. Background Art

[0002] The tactile feedback function of electronic products such as tablet computers and touchpads is becoming more and more popular. For example, the common way to generate tactile feedback is that the controller provides a preset driving waveform, and the driver drives the vibration generating component. Usually, the driving waveform includes an excitation phase - generating vibration to generate tactile feedback and a braking phase - causing the vibration to stop and produce a sharp touch.

[0003] The limited dimensional accuracy, property consistency, and stability of the product material to the operating environment and time may cause product characteristics to vary; or the operator's conditions - such as the force applied by the hand on the touchpad or the size of the contact area - may be coupled to the product and may also cause the product characteristics to change. If the product characteristics change but are still used with a fixed preset drive, the above-mentioned touch feeling - that is, under vibration conditions - may deviate from the expected target. Summary of the invention

[0004] The object of the present invention is to provide a vibration feedback device and a control method thereof, which can reduce the problem of deviation from the expected target under vibration conditions by forming a closed-loop driver architecture.

[0005] According to the above-mentioned purpose, the present invention provides a vibration feedback device, including a substrate, the substrate having a first surface and a second surface, the first surface being a user operation surface, the second surface comprising at least one driving coil, at least one induction coil, a controller and a driver, the controller being electrically connected to the user operation surface, the at least one induction coil, the driver and the at least one driving coil, the at least one driving coil and the at least one induction coil being arranged at intervals from each other; a frame, the frame being arranged corresponding to the second surface of the substrate, and the frame comprising a first magnet group corresponding to the at least one driving coil and a second magnet group corresponding to the at least one induction coil corresponding to the second surface; and at least three displacement recovery devices, one end of each of the displacement recovery devices being connected to the frame, and the other end of each of the displacement recovery devices being connected to the substrate.

[0006] In some embodiments, the substrate is a touch pad, a flat keyboard, or a touch screen of a tablet computer.

[0007] In some embodiments, the frame may also be fixed to an external device having greater volume and weight.

[0008] In some embodiments, the at least one driving coil is wound and arranged at an appropriate position corresponding to the first magnet group on the frame, and a driving force can be generated for the at least one driving coil relative to the corresponding first magnet group by applying current to the at least one driving coil; an axis (or z-axis) around which the driving coil is wound is perpendicular to the second surface of the substrate, and the at least one driving coil is acted on by a component of the magnetic field (B-field) perpendicular to the second surface of the substrate, and the driving force is parallel to an extension direction (or Y-axis) of the second surface of the substrate.

[0009] In some embodiments, the at least one induction coil can obtain an induced voltage that is proportional to a movement speed of the substrate relative to the frame by winding and setting it at an appropriate position corresponding to the second magnet group on the frame; an axis (z-axis) around which the at least one induction coil is wound is perpendicular to the second surface of the substrate, and the at least one induction coil is acted upon by a component of a magnetic field (B-field) perpendicular to the second surface of the substrate, and the induced voltage reflects the extension direction (or Y-axis) component of the second surface relative to the movement speed.

[0010] In some embodiments, each of the displacement recovery devices is a cantilever beam, an extension direction (or X-axis) of the cantilever beam is parallel to the extension direction of the second surface of the substrate and perpendicular to a direction (Y-axis) of the driving force.

[0011] In some embodiments, the user operation surface may use a capacitive detection sensor, a pressure sensor, a Hall sensor, or an impedance sensor, which is configured as a trigger signal unit to provide a trigger signal received by the controller.

[0012] The present invention further provides a vibration feedback control method, the steps of which include: receiving the trigger signal from the trigger signal unit through the controller and being in a trigger signal receiving state; when the controller receives the trigger signal, entering a closed-loop control state; confirming whether the controller outputs a preset excitation signal, if so, proceeding to the next step, if not, returning to the previous step; the controller executes and completes outputting the preset excitation signal; the controller reads an induced voltage for feedback control; the induced voltage is multiplied by an appropriate ratio; the controller outputs a drive signal to control a drive coil; confirming whether the controller outputs the drive signal within a control time, if so, ending, if not, returning to the step of the controller reading the induced voltage for feedback control.

[0013] In some embodiments, the controller also receives the induced voltage of the induction coil connected thereto, and converts the induced voltage into a feedback signal to become the driving signal. The feedback signal can be used to suppress the movement or vibration of the substrate relative to the frame. The controller can switch the output of the excitation signal and the feedback signal and terminate the output.

[0014] In order to make the above-mentioned objects, features and advantages of the present invention more clearly understood, the specific embodiments listed below are described in detail with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1a to Figure 1c A schematic diagram of the waveform of voltage versus time is provided for the first embodiment of the vibration feedback control method of the present invention;

[0016] Figure 2a to Figure 2c A schematic diagram of the voltage-to-time waveform of the second embodiment of the vibration feedback control method provided by the present invention;

[0017] Figure 3a to Figure 3c A schematic diagram of a voltage-to-time waveform of a third embodiment of a vibration feedback control method provided by the present invention;

[0018] Figure 4a A schematic structural block diagram of a vibration feedback device is provided for the present invention;

[0019] Figure 4b A flow chart of a vibration feedback control method is provided for the present invention;

[0020] Figure 5a A partial side view schematic diagram of a vibration feedback device is provided for the present invention;

[0021] Figure 5b A schematic plan view of a surface of a vibration feedback device relative to a user operating surface is provided for the present invention;

[0022] Figure 5c A partially exploded schematic diagram of a vibration feedback device is provided for the present invention.

[0023] Description of reference numerals:

[0024] 100: Provide a vibration feedback device, 1: substrate, 11: first surface, 12: second surface, 2: frame, 21: extension plate, 22: extension plate, 3: displacement recovery device, 31: first end, 32: second end, 33: neck section, 4: drive coil, 5: induction coil, 6: controller, 7: driver, 8: first magnet group, 9: second magnet group, S100: vibration feedback control method, S110-S150: steps, X: axis, Y: axis, Z: axis. DETAILED DESCRIPTION

[0025] The advantages, features and technical methods achieved by the present invention will be described in more detail with reference to exemplary embodiments and the accompanying drawings so as to be more easily understood, and the present invention can be implemented in different forms, so it should not be understood that the present invention is limited to the embodiments described herein. On the contrary, for those with ordinary knowledge in the relevant technical field, the provided embodiments will make the present disclosure more thorough and comprehensive and fully convey the scope of the present invention, and the present invention will only be defined by the scope of the attached patent application.

[0026] In addition, the terms "include" and / or "comprising" refer to the presence of stated features, regions, wholes, steps, operations, components and / or parts, but do not exclude the presence or addition of one or more other features, regions, wholes, steps, operations, components, parts and / or combinations thereof.

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0028] Figure 4a A structural block diagram of a vibration feedback device is provided for the present invention. Figure 5a A partial side view schematic diagram of a vibration feedback device is provided for the present invention. Figure 5b A schematic plan view of a surface of a vibration feedback device relative to a use operation surface is provided for the present invention. Figure 5c An exploded schematic diagram of a vibration feedback device is provided for the present invention.

[0029] Please refer to Figure 4a , Figure 5a , Figure 5b and Figure 5c The vibration feedback device 100 of the present invention includes a substrate 1, a frame 2, and at least three displacement recovery devices 3. In the embodiment of the present invention, four displacement recovery devices are used as an example for illustration, but the present invention is not limited thereto.

[0030] The substrate 1 has a first surface 11 and a second surface 12. The first surface 11 can be a user operation surface. The second surface 12 includes at least one driving coil 4, at least one induction coil 5, a controller 6 and a driver 7. The controller 6 is electrically connected to the first surface 11 of the user operation surface, at least one induction coil 5, the driver 7 and at least one driving coil 4. In some embodiments, the user operation surface of the first surface 11 can use a capacitive detection sensor, a pressure sensor, a Hall sensor or an impedance sensor, which is configured as a trigger signal unit (i.e., the first surface 11) to provide a trigger signal received by the controller 6.

[0031] In some embodiments, the substrate 1 may be a touch pad, a flat keyboard, a touch screen of a tablet computer, etc., one side of which (i.e., the user operation side of the first surface 11) can receive the position of a finger on it and apply pressure thereto, and the substrate 1 can measure the position and pressure. When the substrate 1 needs to respond to an operation, the vibration of the substrate 1 can be used as tactile feedback.

[0032] The frame 2 is disposed corresponding to the second surface 12 of the substrate 1. The frame 2 includes a first magnet group 8 corresponding to the at least one driving coil 4 and a second magnet group 9 corresponding to the at least one induction coil 5 corresponding to the second surface 12. In some embodiments, the at least one driving coil 4 and the at least one induction coil 5 are disposed spaced apart from each other.

[0033] One end (the first end 31 ) of each displacement restoring device 3 is connected to the frame 2 , and the other end (the second end 32 ) of each displacement restoring device 3 is connected to the substrate 1 .

[0034] In some embodiments, the frame 2 can be fixed to an external device with a larger volume and weight, so it can be considered as approximately fixed. The frame 2 is connected to the substrate 1 through the displacement recovery device 3. The substrate 1 can move (including vibration) relative to the frame 2 and return to its natural position through the displacement recovery device 3 when there is no force.

[0035] In some embodiments, at least one driving coil 4 is wound and set at an appropriate position corresponding to the first magnet group 8 on the frame 2, that is, set at an extension plate 21 on the frame 2, and a driving force of the at least one driving coil 4 relative to the corresponding first magnet group 8 can be generated by applying current to the at least one driving coil 4; and an axis (or Z-axis) around which the driving coil 4 is wound is perpendicular to the second surface 12 of the substrate 1, and the at least one driving coil 4 is acted upon by a component of the magnetic field (B-field) perpendicular to the second surface 12 of the substrate 1, and the driving force is parallel to an extension direction (or Y-axis) of the second surface 12 of the substrate 1.

[0036] Similarly, in some embodiments, at least one induction coil 5 is wound and set at an appropriate position corresponding to the second magnet group 9 on the frame 2, that is, set at an extension plate 22 on the frame 2, so that an induced voltage proportional to a movement speed of the substrate 1 relative to the frame 2 can be obtained; an axis (Z axis) around which the at least one induction coil 5 is wound is perpendicular to the second surface 12 of the substrate 1, and the at least one induction coil 5 is acted upon by a component of the magnetic field (B-field) perpendicular to the second surface 12 of the substrate 1, and the induced voltage reflects the extension direction (or Y-axis) component of the second surface 12 relative to the movement speed.

[0037] In some embodiments, each displacement recovery device 3 may be a cantilever beam. An extension direction (or X-axis) of the cantilever beam is parallel to the extension direction of the second surface 12 of the substrate 1 and perpendicular to a direction (Y-axis) of the driving force. The second end 32 of each displacement recovery device 3 in the form of a cantilever beam faces a surface of the substrate 1 and is connected to the substrate 1, thereby achieving the vibration buffering effect of the cantilever beam. In other embodiments, the cantilever beam at least includes a neck section 33 with a narrower width. Through different width designs, the displacement recovery device 3 in the form of a cantilever beam can obtain a better buffering vibration recovery efficiency.

[0038] Figure 4b The present invention provides a flow chart of the vibration feedback control method. Figure 4b , and with reference Figure 4b , Figure 5a , Figure 5b and Figure 5c The present invention provides a vibration feedback control method S100 for a vibration feedback device 100, the steps of which include: receiving the trigger signal from the trigger signal unit through the controller, and being in a trigger signal receiving state (step S110); when the controller receives the trigger signal, entering a closed-loop control state (step S120); confirming whether the controller outputs a preset excitation signal, if yes, proceeding to the next step, if no, returning to the previous step (step S130); the controller executes and completes outputting the preset excitation signal; the controller reads an induced voltage for feedback control (step S140); the induced voltage is multiplied by an appropriate ratio (step S150); the controller outputs a driving signal to control a driving coil (step S160); confirming whether the controller outputs the driving signal within a control time, if yes, ending, if no, returning to the step of the controller reading the induced voltage for feedback control (step S170).

[0039] In the above step S110, the controller 6 pre-sets at least one set of excitation signals as driving signals. In some embodiments, the controller 6 can also receive the induced voltage of the induction coil 5 connected thereto, and convert the induced voltage into a feedback signal to become a driving signal. The feedback signal can be used to suppress the movement (or vibration) of the substrate 1 relative to the frame 2. That is, the controller 6 can switch the output of the excitation signal and the feedback signal and terminate the output.

[0040] In the vibration feedback control method S100 for providing the vibration feedback device 100, the controller 6 can be configured as a server to receive a trigger signal from the trigger signal unit. Figure 4b After the control process is executed, the controller 6 returns to the state of waiting for the trigger signal from the trigger signal unit. After the power is turned on, the controller 6 stays in the state of receiving the trigger signal.

[0041] In the state of receiving the trigger signal in step S110, until the trigger signal is true, the controller 6 will execute the preset excitation signal and enter the closed loop control state. In the closed loop control state in step S120, the induced voltage for feedback control is read and multiplied by an appropriate ratio, and the drive signal is output to control the drive coil 4 until the control time is completed and the state of receiving the trigger signal is returned.

[0042] Figure 1a to Figure 1c The present invention provides a first embodiment of the vibration feedback control method of the voltage versus time waveform diagram, wherein the vertical axis represents the induced voltage and the horizontal axis represents time. Figure 1a In FIG. 5 , when the optimal excitation signal driving is designed according to the product characteristics, the solid line waveform represents the preset excitation signal, and the dotted line waveform represents the induced voltage of the induction coil 5. Figure 1b When the product characteristic frequency rises by 2%, Figure 1a It can be seen that after the drive stops, there is still an obvious induced voltage, that is, the substrate 1 has residual vibration relative to the frame 2. Figure 1c When the product characteristic frequency drops by 2%, Figure 1a It can be seen from the excitation signal that after the drive stops, there is still a significant induced voltage, that is, there is residual vibration of the substrate 1 relative to the frame 2. Figure 1a to Figure 1c The first embodiment of the present invention is that when only a preset excitation signal is used for driving, an excitation signal can be designed according to the characteristics of a specific product, so that the vibration can be suppressed immediately after the vibration is generated; however, when, for example, the characteristic frequency of the product is offset by 2%, the same excitation signal cannot effectively suppress the vibration and leaves residual vibration. For example, if the characteristic frequency is offset by 2%, the deviation can be achieved if the material size has a 1.4% error, for example, when the material size is 0.8mm, the deviation is 0.01mm.

[0043] Figure 2a to Figure 2c The present invention provides a second embodiment of the vibration feedback control method of the voltage versus time waveform diagram, wherein the vertical axis represents the induced voltage and the horizontal axis represents time. Figure 2a In the figure, the optimal excitation signal drive is designed according to the product characteristics, and the closed-loop drive is matched. The solid line waveform represents the preset excitation signal, the dotted line waveform represents the induced voltage of the induction coil 5, and the arrow indicates the closed-loop drive. Figure 2b When the characteristic frequency of the product increases by 10%, Figure 2a It can be seen that after the drive stops, the residual vibration of the substrate 1 relative to the frame 2 is still suppressed. Figure 2c When the characteristic frequency of the product increases by 10%, Figure 2a It can be seen that after the drive stops, the residual vibration of the substrate 1 relative to the frame 2 is still suppressed. Please refer to Figure 2a to Figure 2cThe second embodiment of the present invention is to use the feedback signal as a drive at an appropriate time after using the preset excitation signal to drive. Under different product characteristics, for example, ±2% can effectively suppress vibration, and even ±10% characteristic frequency deviation can be tolerated. In this embodiment, the induced voltage is multiplied by an appropriate ratio as a feedback signal drive. At this time, the driving force effect is a damping force proportional to the relative motion speed but in the opposite direction to the relative motion direction.

[0044] Figure 3a to Figure 3c The present invention provides a third embodiment of the vibration feedback control method of the voltage versus time waveform diagram, wherein the vertical axis represents the induced voltage and the horizontal axis represents time. Figure 3a In the figure, the optimal excitation signal drive is designed according to the product characteristics, and the closed-loop drive is matched. The solid line waveform represents the preset excitation signal, the dotted line waveform represents the induced voltage of the induction coil 5, and the arrow indicates the closed-loop drive. Figure 3b When the characteristic frequency of the product increases by 10%, Figure 3a It can be seen that after the drive stops, the residual vibration of the substrate 1 relative to the frame 2 is still suppressed. Figure 3c When the characteristic frequency of the product increases by 10%, Figure 3a It can be seen from the setting that after the drive stops, the residual vibration of the substrate 1 relative to the frame 2 is still suppressed.

[0045] In summary, the present invention discloses a vibration feedback device 100 and a control method thereof, wherein the vibration feedback device 100 comprises a substrate 1, a frame 2 and a plurality of displacement recovery devices 3; one end of the displacement recovery device is connected to the frame 2, and the other end is connected to the substrate 1; one side of the substrate 1 is a user operation side, and the other side comprises at least one driving coil 4, at least one induction coil 5, a controller 6 and a driver 7; the frame 2 further comprises a first magnet group 8 corresponding to the driving coil 4 and a second magnet group 9 corresponding to the induction coil 5; the controller 6 processes the signal obtained by the induction coil 5 to drive the vibration feedback device 100 to achieve a reliable vibration suppression effect.

[0046] What is disclosed in this case is a preferred embodiment. Any partial changes or modifications that are derived from the technical ideas of this case and are easily inferred by people familiar with the technology do not depart from the scope of the patent rights of this case.

[0047] In summary, this case shows that its purpose, means and effects are very different from the conventional technical features, and its first invention is suitable for practical use, and it also meets the patent requirements for invention.

Claims

1. A vibration feedback device, characterized in that: include: A substrate, the substrate having a first surface and a second surface, the first surface being a user operation surface, the second surface comprising at least one driving coil, at least one induction coil, a controller and a driver, the controller being electrically connected to the user operation surface, the at least one induction coil, the driver and the at least one driving coil, the at least one driving coil and the at least one induction coil being spaced apart from each other; a frame, the frame is disposed corresponding to the second surface of the substrate, and the frame corresponding to the second surface includes a first magnet group corresponding to the at least one driving coil and a second magnet group corresponding to the at least one induction coil; and At least three displacement recovery devices, one end of each of the displacement recovery devices is connected to the frame, and the other end of each of the displacement recovery devices is connected to the base plate.

2. The device for providing vibration feedback according to claim 1, characterized in that: The substrate is a touch panel, a flat keyboard or a touch screen of a tablet computer.

3. The device for providing vibration feedback according to claim 1, characterized in that: The frame can also be fixed to an external device having greater volume and weight.

4. The device for providing vibration feedback according to claim 1, characterized in that: The at least one driving coil is wound and arranged at an appropriate position corresponding to the first magnet group on the frame, and a driving force can be generated for the at least one driving coil relative to the corresponding first magnet group by applying current to the at least one driving coil; an axis around which the driving coil is wound is perpendicular to the second surface of the substrate, and the at least one driving coil is acted upon by a component of the magnetic field perpendicular to the second surface of the substrate, and the driving force is parallel to an extension direction of the second surface of the substrate.

5. The device for providing vibration feedback according to claim 4, characterized in that: The at least one induction coil can obtain an induced voltage proportional to a movement speed of the substrate relative to the frame by winding and setting it at an appropriate position corresponding to the second magnet group on the frame; an axis around which the at least one induction coil is wound is perpendicular to the second surface of the substrate, and the at least one induction coil is acted on by a component of the magnetic field perpendicular to the second surface of the substrate, and the induced voltage reflects the extension direction component of the second surface relative to the movement speed.

6. The device for providing vibration feedback according to claim 5, characterized in that: Each of the displacement recovery devices is a cantilever beam, and an extension direction of the cantilever beam is parallel to the extension direction of the second surface of the substrate and is perpendicular to a direction of the driving force.

7. The device for providing vibration feedback according to claim 6, characterized in that: The cantilever beam at least comprises a neck section with a narrower width.

8. The device for providing vibration feedback according to claim 1, characterized in that: The user operation surface may use a capacitive detection sensor, a pressure sensor, a Hall sensor or an impedance sensor, which is configured as a trigger signal unit to provide a trigger signal received by the controller.

9. A control method for providing a vibration feedback device according to any one of claims 1 to 8, characterized in that: include: The controller receives the trigger signal from the trigger signal unit and is in a trigger signal receiving state; When the controller receives the trigger signal, it enters a closed-loop control state; Confirm whether the controller outputs a preset excitation signal, if yes, proceed to the next step, if no, return to the previous step; The controller executes and outputs the preset excitation signal; The controller reads an induction voltage for feedback control; The induced voltage is multiplied by an appropriate ratio; The controller outputs a driving signal to control a driving coil; as well as Confirm whether the controller outputs the driving signal within a control time. If yes, then end the process. If no, then return to the step of the controller reading the induced voltage for feedback control.

10. The control method for providing a vibration feedback device according to claim 9, characterized in that: The method further comprises: The controller receives the induced voltage of the induction coil connected thereto, and converts the induced voltage into a feedback signal to become the driving signal. The feedback signal can be used to suppress the movement or vibration of the substrate relative to the frame. The controller can switch the output of the excitation signal and the feedback signal and terminate the output.

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