Drive circuit for vibration apparatus, and electronic device

Abstract

Disclosed in the present invention are a drive circuit for a vibration apparatus, and an electronic device. The vibration apparatus comprises a first linear resonant actuator, a second linear resonant actuator and a connecting component, wherein the first linear resonant actuator is arranged at a first end of the connecting component, the second linear resonant actuator is arranged at a second end of the connecting component, and the directions of vibration of the first linear resonant actuator and the second linear resonant actuator are both parallel to a first direction. The drive circuit is configured to drive the first linear resonant actuator and the second linear resonant actuator in-phase, so as to make the vibration apparatus translate in the first direction; alternatively, the drive circuit drives the first linear resonant actuator and the second linear resonant actuator out-of-phase, so as to make the vibration apparatus rotate about a first axis, wherein the first axis passes through a midpoint of a first line segment, and is perpendicular to the first line segment and the first direction, and the first line segment is a line segment that connects the first linear resonant actuator to the second linear resonant actuator.

Description

Driving circuit of vibration device and electronic equipment Technical Field

[0001] The present invention relates to the technical field of vibration devices, and more particularly, to a driving circuit and electronic equipment of a vibration device. Background Art

[0002] Linear Resonant Actuator (LRA) has been widely used in various vibration applications in consumer electronics, especially gaming and AR / VR products, due to its advantages such as strong, rich, crisp vibration and low energy consumption.

[0003] The richness of vibration in a single direction and a single frequency is limited and can no longer meet the vibration needs of current consumer products.

[0004] Summary of the Invention

[0005] One purpose of the embodiments of the present invention is to provide a new technical solution that can provide rich vibration sensations.

[0006] According to a first aspect of the present invention, a drive circuit for a vibration device is provided. The vibration device includes a first linear motor, a second linear motor, and a connecting member. The first linear motor is disposed at a first end of the connecting member, and the second linear motor is disposed at a second end of the connecting member. The vibration directions of the first linear motor and the second linear motor are both parallel to a first direction.

[0007] The driving circuit is configured to drive the first linear motor and the second linear motor in phase so that the vibration device moves translationally along the first direction; or to drive the first linear motor and the second linear motor in anti-phase so that the vibration device rotates about a first axis;

[0008] The first axis passes through the midpoint of a first line segment, is perpendicular to the first line segment, and is perpendicular to the first direction. The first line segment is a line segment connecting the first linear motor and the second linear motor.

[0009] Optionally, the driving circuit includes a first signal output module, a first control module, a non-inverting output module, and an inverting output module.

[0010] The first signal output module is used to output a first driving signal to the first linear motor;

[0011] The first control module is used to control the in-phase output module to operate when the first linear motor and the second linear motor are driven in the same phase; and to control the in-phase output module to operate when the first linear motor and the second linear motor are driven in opposite phases;

[0012] The in-phase output module is used to output the first driving signal to the second linear motor;

[0013] The inverting output module is used to perform inverting processing on the first driving signal to obtain a second driving signal, and output the second driving signal to the second linear motor.

[0014] Optionally, the first end of the first signal output module is connected to the first end of the first linear motor, and the second end of the first signal output module is connected to the second end of the first linear motor.

[0015] Optionally, the in-phase output module includes a first switch and a second switch, wherein the first switch is connected between the first end of the first signal output module and the first end of the second linear motor, and the second switch is connected between the second end of the first signal output module and the second end of the second linear motor;

[0016] When the first control module controls the in-phase output module to operate, both the first switch and the second switch are turned on.

[0017] Optionally, the inverting output module includes a third switch and a fourth switch, the third switch is connected between the first end of the first signal output module and the second end of the second linear motor, and the fourth switch is connected between the second end of the first signal output module and the first end of the second linear motor;

[0018] When the first control module controls the inverting output module to operate, the third switch and the fourth switch are both controlled to be turned on.

[0019] Optionally, any switch is a transistor.

[0020] Optionally, the driving circuit includes a second signal output module, a third signal output module, a second control module, and a gating module corresponding to each linear motor.

[0021] The second signal output module is used to output a third driving signal;

[0022] The third signal output module is used to output a fourth driving signal, wherein the phases of the third driving signal and the fourth driving signal are opposite;

[0023] The second control module is used to control the state of the gating module;

[0024] The gating module is configured to transmit the third driving signal to the corresponding linear motor in a first state, and to transmit the fourth driving signal to the corresponding linear motor in a second state.

[0025] Optionally, the selection module includes a fifth switch and a sixth switch, the fifth switch is connected between the first end of the second signal output module and the first end of the corresponding linear motor, the sixth switch is connected between the first end of the third signal output module and the first end of the corresponding linear motor, and the second end of the second signal output module and the second end of the third signal output module are both connected to the second end of the corresponding linear motor.

[0026] Optionally, the driving circuit includes a DC power supply and an H-bridge driving circuit corresponding to each linear motor, wherein the H-bridge driving circuit is connected between the DC power supply and the corresponding linear motor;

[0027] When the first linear motor and the second linear motor are driven in phase, the H-bridge driving circuit corresponding to the first linear motor and the H-bridge driving circuit corresponding to the second linear motor output driving signals with the same phase;

[0028] When the first linear motor and the second linear motor are driven in anti-phase, the H-bridge driving circuits corresponding to the first linear motor and the second linear motor output driving signals with opposite phases.

[0029] According to a second aspect of the present disclosure, an electronic device is provided, comprising the driving circuit according to the first aspect of the present disclosure.

[0030] In the embodiments of the present disclosure, by customizing a directional drive waveform and controlling the first linear motor and the second linear motor to be driven in phase or in reverse phase, the vibration device can achieve virtual directional tactile sensations of translation along a first direction and rotation around a first axis, providing a tactile experience that is completely different from existing vibrations.

[0031] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0033] FIG1 is a schematic diagram of a vibration device provided according to an embodiment of the present disclosure;

[0034] FIG2 is a schematic diagram of a vibration device provided according to an embodiment of the present disclosure;

[0035] FIG3 is a schematic diagram of a directional acceleration waveform of a linear motor provided according to an embodiment of the present disclosure;

[0036] FIG4 is a schematic diagram of a vibration device provided according to an embodiment of the present disclosure;

[0037] FIG5 is a schematic diagram of a vibration device provided according to an embodiment of the present disclosure;

[0038] FIG6 is a schematic diagram of a vibration device provided according to an embodiment of the present disclosure;

[0039] FIG7 is a schematic diagram of a vibration device provided according to an embodiment of the present disclosure;

[0040] FIG8 is a block diagram of a driving circuit provided according to an embodiment of the present disclosure;

[0041] FIG9 is a circuit diagram of a driving circuit provided according to an embodiment of the present disclosure;

[0042] FIG10 is a block diagram of a driving circuit according to an embodiment of the present disclosure;

[0043] FIG11 is a circuit diagram of a driving circuit provided according to an embodiment of the present disclosure;

[0044] FIG12 is a circuit diagram of a driving circuit provided according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0045] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0046] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0047] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0048] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0049] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0050] <Drive Circuit>

[0051] 1 and 2 are schematic diagrams of a vibration device according to an embodiment of the present disclosure.

[0052] As shown in Figures 1 and 2, the vibration device 100 may include a first linear motor LRA1, a second linear motor LRA2, and a connecting member 110. The first linear motor LRA1 is disposed at a first end of the connecting member 110, and the second linear motor LRA2 is disposed at a second end of the connecting member 110. The vibration directions of the first linear motor LRA1 and the second linear motor LRA2 are both parallel to the first direction.

[0053] The driving circuit is configured to drive the first linear motor LRA1 and the second linear motor LRA2 in phase to make the vibration device 100 translate along the first direction; or drive the first linear motor LRA1 and the second linear motor LRA2 in opposite phase to make the vibration device 100 rotate around the first axis.

[0054] The first axis passes through the midpoint of the first line segment, is perpendicular to the first line segment, and is perpendicular to the first direction. The first line segment is a line segment connecting the first linear motor LRA1 and the second linear motor LRA2.

[0055] A linear motor achieves vibrotactile sensation through the periodic reciprocating motion of its internal vibrator. When the linear motor outputs a directional acceleration waveform with asymmetric amplitudes in the positive and negative directions, as shown in Figure 3, the forces perceived by the human hand differ in magnitude. The combined forces in these two directions create a single-direction tactile sensation, known as directional tactile sensation in the first direction, where the greater force is located. The horizontal axis of Figure 3 represents time, and the vertical axis represents acceleration.

[0056] Furthermore, the acceleration waveform shown in FIG3 may be used as a target, and the voltage waveform required to realize the acceleration waveform may be calculated according to the specific model parameters of the linear motor, that is, the directional drive waveform designed for the linear motor.

[0057] The first linear motor LRA1 and the second linear motor LRA2 are driven in phase, that is, the first linear motor LRA1 and the second linear motor LRA2 are driven by directional driving waveforms with the same phase, so that the two linear motors produce the same directional tactile sensation, thereby achieving the superposition of directional tactile sensations, so that the vibration device can achieve a directional tactile sensation of translation along the first direction.

[0058] The first linear motor LRA1 and the second linear motor LRA2 are driven in anti-phase, that is, the first linear motor LRA1 and the second linear motor LRA2 are driven by directional driving waveforms with opposite phases, so that the two linear motors produce opposite directional tactile sensations, so that the vibration device can achieve a directional tactile sensation of rotation around the first axis.

[0059] In the vibration device 100 shown in Figure 1, the connecting component 110 can be a connecting rod. The x-axis, y-axis and z-axis in Figure 1 can be perpendicular to each other, wherein the axial direction of the connecting rod can be the x-axis direction, the first direction can be the z-axis direction, the first axis can be the y-axis direction, and the two linear motors and the connecting rod form an I-shaped structure. The vibration device in this embodiment can be set on an electronic device such as a game controller or a steering wheel of a vehicle. When the user operates the electronic device with both hands, the user's hands can be respectively held on the installation positions of the two linear motors. When the user operates the electronic device with one hand, the user's single hand can be held on the connecting rod.

[0060] In the vibration device 100 shown in FIG2 , the connecting component 110 can be a circular ring structure, and the x-axis, y-axis, and z-axis in FIG1 can be perpendicular to each other, wherein the direction of the ray directed from the first linear motor LRA1 to the second linear motor LRA2 can be the x-axis direction, the first direction can be the z-axis direction, and the first axis can be the y-axis direction. The vibration device in this embodiment can be installed on an electronic device such as a game controller or a vehicle steering wheel. When a user operates the electronic device with both hands, the user's hands can be respectively held on the installation locations of the two linear motors. When a user operates the electronic device with one hand, the user's hand can be held on the circular ring structure.

[0061] In the examples shown in Figures 1 and 2, when the first and second linear motors LRA1 and LRA2 are driven in phase, they vibrate in the same direction, enabling the vibration device 100 to achieve directional tactile sensations, such as translational motion along the positive or negative z-axis. When the first and second linear motors LRA1 and LRA2 are driven in opposite phases, they vibrate in opposite directions, enabling the vibration device 100 to achieve directional tactile sensations, such as clockwise or counterclockwise rotation around the y-axis. These directional tactile sensations can be used to simulate scenarios such as movement, steering, and unidirectional force in games or augmented reality / virtual reality devices, enriching the tactile experience.

[0062] In the embodiments of the present disclosure, by customizing a directional drive waveform and controlling the first linear motor and the second linear motor to be driven in phase or in reverse phase, the vibration device can achieve virtual directional tactile sensations of translation along a first direction and rotation around a first axis, providing a tactile experience that is completely different from existing vibrations.

[0063] Based on the vibration device 100 shown in Figure 1, the vibration device 100 may further include a third linear motor LRA3 as shown in Figure 4. The third linear motor LRA3 may be centrally mounted within the connecting rod, with the vibration direction of the third linear motor LRA3 parallel to the axis of the connecting shaft. The vibration direction of the third linear motor LRA3 is parallel to the x-axis. Driving the third linear motor LRA3 enables the vibration device to achieve directional tactile sensations along the positive or negative x-axis.

[0064] Based on the vibration device 100 shown in Figure 1, the vibration device 100 may also include a third linear motor LRA3 and a fourth linear motor LRA4 as shown in Figure 5. The third linear motor LRA3 and the fourth linear motor LRA4 can be respectively arranged on both sides of the connecting rod, and the vibration directions of the third linear motor LRA3 and the fourth linear motor LRA4 are both parallel to the x-axis. Driving the third linear motor LRA3 and the fourth linear motor LRA4 in phase can enable the vibration device to achieve directional tactile sensation along the positive or negative direction of the x-axis. Driving the third linear motor LRA3 and the fourth linear motor LRA4 in opposite phases can keep the vibration device stationary.

[0065] Based on the vibration device 100 shown in FIG5 , the vibration device 100 may further include a fifth linear motor LRA5 and a sixth linear motor LRA6 as shown in FIG6 . The fifth linear motor LRA5 and the sixth linear motor LRA6 may be respectively disposed on either side of the connecting rod, and the vibration directions of the fifth linear motor LRA5 and the sixth linear motor LRA6 are both parallel to the y-axis. Driving the fifth linear motor LRA5 and the sixth linear motor LRA6 in phase can enable the vibration device to achieve directional tactile sensations of translational motion along the positive or negative y-axis direction. Driving the fifth linear motor LRA5 and the sixth linear motor LRA6 in opposite phases can enable the vibration device to achieve directional tactile sensations of clockwise or counterclockwise rotation about the z-axis.

[0066] Based on the vibration device 100 shown in Figure 6, the vibration device 100 may also include a circular ring structure, a seventh linear motor LRA7, and an eighth linear motor LRA8 as shown in Figure 7. The seventh linear motor LRA7 and the eighth linear motor LRA8 may be arranged on the circular ring structure, and the straight line connecting the seventh linear motor LRA7 and the eighth linear motor LRA8 may coincide with the z-axis. The vibration directions of the seventh linear motor LRA7 and the eighth linear motor LRA8 are both parallel to the y-axis. Driving the seventh linear motor LRA7 and the eighth linear motor LRA8 in phase can enable the vibration device to achieve directional tactile sensation of translation along the positive or negative direction of the y-axis. Driving the seventh linear motor LRA7 and the eighth linear motor LRA8 in opposite phase can enable the vibration device to achieve directional tactile sensation of clockwise or counterclockwise rotation around the x-axis.

[0067] In the embodiment of the present disclosure, the manner in which the third linear motor LRA3 and the fourth linear motor LRA4 are driven in phase, the manner in which the fifth linear motor LRA5 and the sixth linear motor LRA6 are driven in phase, and the manner in which the seventh linear motor LRA7 and the eighth linear motor LRA8 are driven in phase is the same as the manner in which the first linear motor LRA1 and the second linear motor LRA2 are driven in phase. The manner in which the third linear motor LRA3 and the fourth linear motor LRA4 are driven in phase, the manner in which the fifth linear motor LRA5 and the sixth linear motor LRA6 are driven in phase, and the manner in which the seventh linear motor LRA7 and the eighth linear motor LRA8 are driven in phase is the same as the manner in which the first linear motor LRA1 and the second linear motor LRA2 are driven in phase. Therefore, the present embodiment will be described with reference to the manner in which the first linear motor LRA1 and the second linear motor LRA2 are driven in phase, and the manner in which the first linear motor LRA1 and the second linear motor LRA2 are driven in phase.

[0068] In one embodiment of the present disclosure, as shown in FIG. 8 , the driving circuit 8000 may include a first signal output module 8100 , a first control module 8200 , a non-inverting output module 8300 , and an inverting output module 8400 .

[0069] The first signal output module 8100 is configured to output a first driving signal to the first linear motor.

[0070] The first control module 8200 is used to control the in-phase output module 8300 to operate when the first linear motor LRA1 and the second linear motor LRA2 are driven in the same phase; and to control the in-phase output module 8400 to operate when the first linear motor LRA1 and the second linear motor LRA2 are driven in opposite phases.

[0071] The in-phase output module 8300 is used to output the first driving signal to the second linear motor.

[0072] The inverting output module 8400 is used to perform inverting processing on the first driving signal to obtain a second driving signal and output the second driving signal to the second linear motor.

[0073] In this embodiment, the first driving signal and the second driving signal are both directional driving waveforms.

[0074] The first control module 8200 may control the operation of at most one of the in-phase output module 8300 and the inverting output module 8400. Specifically, the first control module 8200 may control the in-phase output module 8300 to operate and the inverting output module 8400 to not operate. The first control module 8200 may also control the in-phase output module 8300 to not operate and the inverting output module 8400 to operate. The first control module 8200 may also control both the in-phase output module 8300 and the inverting output module 8400 to not operate.

[0075] When the first control module controls the operation of the in-phase output module, the driving circuit 8000 simultaneously drives the first linear motor LRA1 and the second linear motor LRA2 through the first driving signal, that is, the first linear motor LRA1 and the second linear motor LRA2 are driven in phase, so that the first linear motor LRA1 and the second linear motor LRA2 can produce the same directional tactile sensation, realize the superposition of directional tactile sensations, and enable the vibration device to achieve directional tactile sensation of translation along the first direction.

[0076] When the first control module controls the inverting output module to work, the driving circuit 8000 drives the first linear motor LRA1 through the first driving signal and drives the second linear motor LRA2 through the second driving signal, that is, the first linear motor LRA1 and the second linear motor LRA2 are driven in opposite phases, so that the first linear motor LRA1 and the second linear motor LRA2 can generate opposite directional tactile sensations, so that the vibration device can achieve a directional tactile sensation of rotation around the first axis.

[0077] Specifically, a first end of the first signal output module 8100 is connected to a first end of the first linear motor LRA1 , and a second end of the first signal output module 8100 is connected to a second end of the first linear motor LRA1 .

[0078] Furthermore, as shown in FIG9 , the in-phase output module 8300 includes a first switch S1 and a second switch S2. The first switch S1 is connected between the first terminal of the first signal output module 8100 and the first terminal of the second linear motor LRA2, and the second switch S2 is connected between the second terminal of the first signal output module 8100 and the second terminal of the second linear motor LRA2. The control terminals of the first and second switches S1 and S2 are both connected to the first control module 8200.

[0079] When the first control module 8200 controls the in-phase output module 8300 to operate, the first switch S1 and the second switch S2 are both turned on. When the first control module 8200 controls the in-phase output module 8300 to not operate, the first switch S1 and the second switch S2 are both turned off.

[0080] In this embodiment, the first switch S1 and the second switch S2 may both be provided by transistors, specifically triodes or field effect transistors.

[0081] Furthermore, as shown in Figure 9, the inverting output module 8400 includes a third switch S3 and a fourth switch S4, the third switch S3 is connected between the first end of the first signal output module 8100 and the second end of the second linear motor LRA2, and the fourth switch S4 is connected between the second end of the first signal output module 8100 and the first end of the second linear motor LRA2.

[0082] When the first control module 8200 controls the inverting output module 8400 to operate, the third switch S3 and the fourth switch S4 are both turned on. When the first control module 8200 controls the inverting output module 8400 to not operate, the third switch S3 and the fourth switch S4 are both turned off.

[0083] In this embodiment, the third switch S3 and the fourth switch S4 may both be provided by transistors, specifically triodes or field effect transistors.

[0084] In this embodiment, when the first linear motor LRA1 and the second linear motor LRA2 are driven in phase, the first switch S1 and the second switch S2 can be controlled to be turned on, and the third switch S3 and the fourth switch S4 can be turned off, so that the first linear motor LRA1 and the second linear motor LRA2 are connected in parallel in phase between the first end and the second end of the first signal output module 8100.

[0085] When the first linear motor LRA1 and the second linear motor LRA2 are driven in reverse phase, the first switch S1 and the second switch S2 may be controlled to be disconnected, and the third switch S3 and the fourth switch S4 may be controlled to be turned on, so that the first linear motor LRA1 and the second linear motor LRA2 are connected in reverse phase and in parallel between the first end and the second end of the first signal output module 8100.

[0086] By driving the vibration device through the driving circuit of this embodiment, the first linear motor and the second linear motor can share the first signal output module, thereby reducing the hardware cost of the driving circuit.

[0087] On the basis of this embodiment, when the vibration device further includes other linear motors, the driving circuit may further include an in-phase output module and an inverted output module corresponding to each linear motor.

[0088] In another embodiment of the present disclosure, as shown in FIG10 , a driving circuit 9000 includes a second signal output module 9100, a third signal output module 9200, a second control module 9300, and a gating module 9400 corresponding to each linear motor.

[0089] The second signal output module 9100 is configured to output a third driving signal.

[0090] The third signal output module 9200 is configured to output a fourth driving signal, wherein the third driving signal and the fourth driving signal have opposite phases.

[0091] The second control module 9500 is used to control the state of the gating module 9400 .

[0092] The gating module 9400 is configured to transmit the third driving signal to the corresponding linear motor in the first state, and to transmit the fourth driving signal to the corresponding linear motor in the second state.

[0093] When the second control module controls the gating module 5400 corresponding to the first linear motor LRA1 to be in the first state and the gating module 5400 corresponding to the second linear motor LRA2 to be in the first state, the driving circuit 3000 simultaneously drives the first linear motor LRA1 and the second linear motor LRA2 through the third driving signal, that is, drives the first linear motor LRA1 and the second linear motor LRA2 in phase, so that the first linear motor LRA1 and the second linear motor LRA2 can produce the same directional tactile sensation, realize the superposition of directional tactile sensations, and enable the vibration device to achieve directional tactile sensation of translation along the first direction. When the second control module controls the gating module 5400 corresponding to the first linear motor LRA1 to be in the first state and the gating module 5400 corresponding to the second linear motor LRA2 to be in the second state, the driving circuit 3000 drives the first linear motor LRA1 through the third driving signal and drives the second linear motor LRA2 through the fourth driving signal, that is, the first linear motor LRA1 and the second linear motor LRA2 are driven in opposite phases, so that the first linear motor LRA1 and the second linear motor LRA2 can produce opposite directional tactile sensations, so that the vibration device can achieve a directional tactile sensation of rotation around the first axis.

[0094] Specifically, as shown in Figure 11, the selection module 9300 includes a fifth switch S5 and a sixth switch S6. The fifth switch S5 is connected between the first end of the second signal output module 9100 and the first end of the corresponding linear motor. The sixth switch S6 is connected between the first end of the third signal output module 9200 and the first end of the corresponding linear motor. The second end of the second signal output module 9100 and the second end of the third signal output module 9200 are both connected to the second end of the corresponding linear motor.

[0095] In this embodiment, when the first linear motor LRA1 and the second linear motor LRA2 are driven in phase, the fifth switch S5 corresponding to the first linear motor LRA1 may be turned on, and the sixth switch S6 corresponding to the second linear motor LRA2 may be turned off, thereby connecting the pair of linear motors in parallel and in phase between the first and second terminals of the second signal output module 9100. When the first linear motor LRA1 and the second linear motor LRA2 are driven in phase opposition, the fifth switch S5 corresponding to the first linear motor LRA1 may be turned on, and the sixth switch S6 corresponding to the second linear motor LRA2 may be turned on, thereby connecting one of the pair of linear motors between the first and second terminals of the second signal output module 9100 and the other between the first and second terminals of the third signal output module 9200.

[0096] By driving the vibration device through the driving circuit of this embodiment, the control logic of the driving circuit can be made simple and clear, easy to implement, and the number of switches can be reduced.

[0097] On the basis of this embodiment, when the vibration device further includes other linear motors, the driving circuit may further include a gating module corresponding to each linear motor.

[0098] In another embodiment of the present disclosure, the driving circuit may further include a DC power supply DC and an H-bridge driving circuit corresponding to each linear motor, wherein the H-bridge driving circuit is connected between the DC power supply and the corresponding linear motor.

[0099] When the first linear motor LRA1 and the second linear motor LRA2 are driven in phase, the H-bridge drive circuit corresponding to the first linear motor LRA1 and the H-bridge drive circuit corresponding to the second linear motor LRA2 output drive signals with the same phase. When the first linear motor LRA1 and the second linear motor LRA2 are driven in anti-phase, the H-bridge drive circuits corresponding to the first linear motor LRA1 and the second linear motor LRA2 output drive signals with opposite phases.

[0100] As shown in Figure 12, the H-bridge driving circuit may include a third control module 1211 and an H-bridge circuit, wherein the H-bridge circuit includes a seventh switch S7, an eighth switch S8, a ninth switch S9 and a tenth switch S10, and the control ends of the seventh switch S7, the eighth switch S8, the ninth switch S9 and the tenth switch S10 are all connected to the third control module 1211, the seventh switch S7 is connected between the positive pole of the DC power supply DC and the first end of the corresponding linear motor, the eighth switch S8 is connected between the first end of the corresponding linear motor and the negative pole of the DC power supply DC, the ninth switch S9 is connected between the positive pole of the DC power supply DC and the second end of the corresponding linear motor, and the tenth switch S10 is connected between the second end of the corresponding linear motor and the negative pole of the DC power supply DC.

[0101] In this embodiment, the third control module 1211 performs PWM drive control on the seventh switch S7, the eighth switch S8, the ninth switch S9 and the tenth switch S10 in the H-bridge circuit, so that the H-bridge circuit can output the first drive signal or the second drive signal, so that the vibration device can achieve corresponding directional tactile sensation.

[0102] In this embodiment, the H-bridge circuit corresponding to each linear motor can be independently controlled, and the drive circuit only requires a DC power supply, so the hardware cost is relatively low.

[0103] <Electronic equipment>

[0104] The present disclosure also provides an electronic device, which may include a vibration device and the drive circuit described in any of the aforementioned embodiments. The vibration device may include a first linear motor, a second linear motor, and a connecting member. The first linear motor is disposed at a first end of the connecting member, and the second linear motor is disposed at a second end of the connecting member. The vibration directions of the first linear motor and the second linear motor are both parallel to the first direction.

[0105] While various embodiments of the present invention have been described above, the foregoing description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or technical improvements to existing technologies, or to enable others skilled in the art to understand the embodiments disclosed herein. The scope of the present invention is defined by the appended claims.

Claims

1. A driving circuit for a vibration device, characterized in that: The vibration device comprises a first linear motor, a second linear motor and a connecting component, wherein the first linear motor is arranged at a first end of the connecting component, and the second linear motor is arranged at a second end of the connecting component, and the vibration directions of the first linear motor and the second linear motor are both parallel to the first direction; The driving circuit is configured to drive the first linear motor and the second linear motor in phase so that the vibration device moves in translation along the first direction; or to drive the first linear motor and the second linear motor in anti-phase so that the vibration device rotates around a first axis; The first axis passes through the midpoint of a first line segment, is perpendicular to the first line segment, and is perpendicular to the first direction, and the first line segment is a line segment connecting the first linear motor and the second linear motor.

2. The driving circuit according to claim 1, characterized in that: The driving circuit includes a first signal output module, a first control module, a common-phase output module, and an inverse-phase output module. The first signal output module is used to output a first driving signal to the first linear motor; The first control module is used to control the same-phase output module to work when the first linear motor and the second linear motor are driven in the same phase; When the first linear motor and the second linear motor are driven in reverse phase, controlling the reverse output module to operate; The in-phase output module is used to output the first driving signal to the second linear motor; The inverting output module is used to perform inverting processing on the first driving signal to obtain a second driving signal, and output the second driving signal to the second linear motor.

3. The driving circuit according to claim 2, characterized in that: A first end of the first signal output module is connected to a first end of the first linear motor, and a second end of the first signal output module is connected to a second end of the first linear motor.

4. The driving circuit according to claim 2, characterized in that: The in-phase output module includes a first switch and a second switch, the first switch is connected between a first end of the first signal output module and a first end of the second linear motor, and the second switch is connected between a second end of the first signal output module and a second end of the second linear motor; When the first control module controls the in-phase output module to work, both the first switch and the second switch are turned on.

5. The driving circuit according to claim 2, characterized in that: The inverting output module includes a third switch and a fourth switch, the third switch is connected between the first end of the first signal output module and the second end of the second linear motor, and the fourth switch is connected between the second end of the first signal output module and the first end of the second linear motor; When the first control module controls the inverting output module to work, the third switch and the fourth switch are controlled to be turned on.

6. The driving circuit according to claim 4 or 5, characterized in that: Either switch is a transistor.

7. The driving circuit according to claim 1, characterized in that: The driving circuit includes a second signal output module, a third signal output module, a second control module and a gating module corresponding to each linear motor. The second signal output module is used to output a third driving signal; The third signal output module is used to output a fourth driving signal, wherein the third driving signal and the fourth driving signal have opposite phases; The second control module is used to control the state of the gating module; The gating module is used to transmit the third driving signal to the corresponding linear motor in a first state, and to transmit the fourth driving signal to the corresponding linear motor in a second state.

8. The driving circuit according to claim 7, characterized in that: The selection module includes a fifth switch and a sixth switch, the fifth switch is connected between the first end of the second signal output module and the first end of the corresponding linear motor, the sixth switch is connected between the first end of the third signal output module and the first end of the corresponding linear motor, and the second end of the second signal output module and the second end of the third signal output module are both connected to the second end of the corresponding linear motor.

9. The driving circuit according to claim 1, characterized in that: The driving circuit includes a DC power supply and an H-bridge driving circuit corresponding to each linear motor, wherein the H-bridge driving circuit is connected between the DC power supply and the corresponding linear motor; When the first linear motor and the second linear motor are driven in phase, the H-bridge driving circuit corresponding to the first linear motor and the H-bridge driving circuit corresponding to the second linear motor output driving signals with the same phase; When the first linear motor and the second linear motor are driven in anti-phase, the H-bridge driving circuits corresponding to the first linear motor and the second linear motor output driving signals with opposite phases.

10. An electronic device, characterized in that: The invention comprises a driving circuit according to any one of claims 1 to 9.

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