CN117896651A - Driving circuit and wearable sound device thereof - Google Patents

Abstract

The invention provides a driving circuit and a wearable sound device thereof, wherein the driving circuit for driving a port device comprises a first node, a second node and an amplifying circuit coupled to the first node. The opening device for being controlled to open an opening or seal the opening comprises a membrane structure and an actuating member, wherein the membrane structure comprises a first flap and a second flap, and the actuating member comprises a first actuating part arranged on the first flap and a second actuating part arranged on the second flap. When the port device is controlled to open the port, the driving circuit generates a first voltage at the first node and generates a second voltage at the second node; when the port device is controlled to seal the port, the driving circuit generates a third voltage at both the first node and the second node. The first voltage is greater than the third voltage, and the third voltage is greater than the second voltage.

Description

Driving circuit and wearable sound device thereof

Technical Field

The present invention relates to a driving circuit and a wearable sound device thereof, and more particularly, to a driving circuit and a wearable sound device thereof capable of improving a latch-up effect (occ effect) and increasing a service life (lifetime) of a vent device.

Background

The occlusion effect is a large perceived sound pressure experienced by the listener due to the sealed volume of the ear canal. For example, the occlusion effect may occur when a listener (in the ear canal) engages in certain movements (e.g., jogging) with wearable sound devices to produce bone conducted sounds. To enhance the audible experience, it is desirable to further improve the latch-up effect.

Disclosure of Invention

Therefore, the present invention mainly provides a driving circuit and a wearable sound device thereof, so as to improve the drawbacks of the prior art.

The invention discloses a driving circuit for driving a vent device (vent device), comprising a first node and a second node; and an amplifying circuit including an amplifying output coupled to the first node; wherein the port device comprises a membrane structure and an actuating element; wherein the membrane structure comprises a first flap and a second flap; the actuating piece comprises a first actuating part arranged on the first flap and a second actuating part arranged on the second flap; wherein the first node is coupled to the first actuating portion, and the second node is coupled to the second actuating portion; wherein the port device is used for being controlled to open a port or seal the port; when the port device is controlled to open the port, the driving circuit generates a first voltage at the first node and generates a second voltage at the second node; when the port device is controlled to seal the port, the driving circuit generates a third voltage at the first node and the second node; the first voltage is greater than the third voltage, and the third voltage is greater than the second voltage.

The invention discloses a wearable sound device, which comprises a through hole device and an actuating piece, wherein the through hole device comprises a film structure and an actuating piece, the film structure comprises a first flap and a second flap, and the actuating piece comprises a first actuating part arranged on the first flap and a second actuating part arranged on the second flap; a driving circuit including a first node and a second node; wherein the first actuating portion and the second actuating portion are coupled to the first node and the second node; wherein the port device is used for being controlled to open a port or seal the port; when the port device is controlled to open the port, the driving circuit generates a first voltage at the first node and generates a second voltage at the second node; when the port device is controlled to seal the port, the driving circuit generates a third voltage at the first node and the second node; the first voltage is greater than the third voltage, and the third voltage is greater than the second voltage.

The invention discloses a driving circuit, which comprises a first flap and a second flap; and a member disposed between a free end of the first flap and a free end of the second flap; wherein the port device is used for being controlled to open a port or seal the port; wherein the first flap and the second flap flex downward when the port device is controlled to open the port; wherein the first flap and the second flap are actuated to maintain a flat position when the port device is controlled to seal the port.

The invention discloses a port device, which comprises a first flap and a second flap; wherein when the port device is controlled to open the port, the first flap is actuated to move in a first direction and the second flap is actuated to move in a second direction opposite the first direction during a first period of time, and the first flap is actuated to move in the second direction and the second flap is actuated to move in the first direction during a second period of time.

The present application designs a drive circuit to open or seal the port of the port device, thereby reducing the latch-up effect. The switching module of the driving circuit is used for switching the first voltage from the first actuating part to the second actuating part and switching the second voltage from the second actuating part to the first actuating part, so that the service life of the port device can be prolonged. By utilizing the characteristics of the port device, the switching module of the driving circuit can be designed to recover energy and reduce power consumption. The driving circuit can also increase the service life of the port device.

Drawings

Fig. 1 is a schematic diagram of a wearable sound device according to an embodiment of the invention.

Fig. 2 to 3 are schematic diagrams of a driving circuit according to an embodiment of the invention.

Fig. 4 to 5 are schematic diagrams of the exchange module according to an embodiment of the present invention.

Fig. 6 is a schematic diagram of a switching module according to an embodiment of the invention.

Fig. 7 is a timing diagram of the voltage, current and control signals of the switching module shown in fig. 5 or 6.

Fig. 8 is a schematic diagram of a low dropout regulator according to an embodiment of the present invention.

Fig. 9 is a schematic diagram of a charge pump according to an embodiment of the invention.

FIG. 10 is a schematic diagram of another embodiment of the present invention providing a long life scenario.

Reference numerals:

10,11 wearable Sound device

10dVR C,20dVR C,30dVR C: driving circuit

10vntD,11vntD: port device

111 Membrane structure

111Fa,111Fb petals

111P parts

112 actuating member

112Ca,112Cb actuating portion

113vnt through hole

114 substrate

130chmF,130chmB volume

2ampC amplification circuit

2erAMP error amplifier

2LDO,8LDO1,8LDO2 low dropout voltage regulator

2PMP,9PMP1,9PMP2 charge pump

3spM,4spMa,4spMb,5spM,6spM: exchange module

5CTR 1-5 CTR3,6rc1,6rc2,6CTR1,6CTR2: control signal

5IL,6IL, inductor

5SW,6SW switching module

6bH1,6bL1,6bH2,6bL2,6bRC1,6bRC2,6bRC3: buffer

6D1,6D2 Schottky diode

6I current

6PZTC1,6PZTC2,6C1,6C2,9C1a-9C5a,9C1b-9C4b capacitor

6tH1,6tL1,6tH2,6tL2,6tRC1,6tRC2,8T1,8T2,9T1-9T4: transistor 8AMP1,8AMP1: amplifier

8LDO1,8LDO2 Low dropout voltage regulator

9D1-9D5 diodes

9S1a,9S2a,9S1b,9S2b: signal

N1, N2, N1', N2': nodes

Nout amplifying output terminal

P, N contacts

R1, R2,6r1,6r2,8r1a,8r2a,8r1b,8r2b: resistance

SW1, SW2,4S12,4S34,4S1-4S 4, S1-S4, SWH1, SWL1, SWH2, SWL2, SWrc1, SWrc2: switches

TT1, TT2, CND1, CND2: time period

Vdc, vdc1, vdc2 reference voltage

X, Y, Z direction

V _down Second voltage

V _in Input voltage

V _in,CP Output voltage

Vo1,Vo2,V _N1 ,V _N2 ,V _N1' ,V _N2' Voltage of 8Vin

V _up First voltage

Detailed Description

Fig. 1 is a schematic diagram of a wearable sound device 10 according to an embodiment of the invention. The wearable sound device 10 (e.g., in-ear device) may include a vent device 10vntD and a driving circuit 10dvrC.

The vent apparatus 10vntD for being controlled to open a vent 113vnt or seal a vent 113vnt may include a membrane structure 111 and an actuator 112. A slit may divide the membrane structure 111 into two opposing flaps 111Fa and 111Fb. The flap 111Fa or 111Fb may include an anchor end and a free end such that the flap 111Fa or 111Fb may be actuated to swing up or down by the actuator 112. The actuator 112 may include actuation portions 112Ca and 112Cb disposed on the flaps 111Fa and 111Fb, respectively.

The driving circuit 10dvrC for driving the port device 10vntD may include nodes N1 and N2. Node N1 is coupled to the actuator 112Ca (e.g., a point or an electrode thereof) to ensure a voltage across the two electrodes of the actuator 112Ca. Node N2 is coupled to the actuator 112Cb (e.g., a point or an electrode thereof) to ensure a voltage across the two electrodes of the actuator 112Cb.

According to part (a) of fig. 1, when the port device 10vntD is controlled to open/form the port 113vnt, the driving circuit 10dvrC may be generated at the node N1 (equal to the first voltage V _up A) voltage Vo1 and at node N2 (equal to the second voltage V _down Voltage Vo2.

In this application, vo1 is used to represent the voltage applied to the actuator 112Ca, and Vo2 is used to represent the voltage applied to the actuator 112Cb. First voltage V _up Representing the voltage that drives the corresponding flap up or toward the positive Z direction. Second voltage V _down Representing the voltage that drives the corresponding flap down or in the negative Z direction.

In the embodiment shown in part (a) of fig. 1, the driving circuit 10dvrC generates the first voltage V _up As the voltage Vo1, and the driving circuit 10dvrC generates the second voltage V _down As voltage Vo2.

According to part (b) of fig. 1, when the port device 10vntD is controlled to close/seal/close the port 113vnt, the driving circuit 10dvrC may generate the voltage Vo1 (equal to the third voltage) at the node N1 and the voltage Vo2 (equal to the third voltage) at the node N2.

In one embodiment, (may be denoted as V) _seal And) the third voltage represents a voltage that drives the corresponding flap to remain in a flat position (parallel to the substrate 114 or base on which the port device 10vntD is disposed). When the driving circuit 10dvrC generates the third voltage V _seal When applied as voltages Vo1 and Vo2, the petals 111Fa and 111Fb are both held in a flat position. In this case, leakage through flaps 111Fa and 111FbThe air is negligible and the vent device 10vntD is considered sealed or closed.

In one embodiment, the first voltage V _up Second voltage V _down Third voltage V _seal Can be 30V, 0V and 15V respectively, namely V _up >V _seal >V _down 。

In one embodiment, the voltage Vo1 applied to the actuation portion 112Ca may be switched between a first voltage and a third voltage, and the voltage Vo2 applied to the actuation portion 112Cb may be switched between a second voltage and a third voltage, such that the vent device 10vntD may be switched between an open state (e.g., to create an airflow channel) and a closed state (e.g., to minimize leakage).

Fig. 2 is a schematic diagram of a driving circuit 20dvrC according to an embodiment of the present invention. The driving circuit 10dvrC may be implemented by the driving circuit 20 dvrC. The driving circuit 20dvrC may include an amplifying circuit 2ampC, a low-dropout regulator (LDO) 2LDO, a charge pump (charge pump) 2PMP, and switches SW1 and SW2. The amplifying circuit 2ampC (having an amplifying output Nout coupled to the node N1) may comprise an error amplifier 2erAMP, resistors R1 and R2 (provided in a (negative) feedback loop (feedback loop) determining the amplifying gain of the amplifying circuit 2 ampC).

When the port device 10vntD is controlled to open the port 113vnt, the switch SW1 coupled between the nodes N1 and N2 is off/cut-off (cutoff). Error amplifier 2erAMP receives an input voltage V (equal to the first input voltage) _in And the first voltage is equal to the first input voltage multiplied by the amplification gain. For example, assuming that the ratio of the resistors R1 and R2 is 24, the first voltage and the first input voltage are 30V and 1.2V, respectively. In addition, the switch SW2 coupled between the node N2 and (electrical) ground is conductive (conductive), so that the second voltage applied to the node N2 is 0V.

When the port device 10vntD is controlled to seal the port 113vnt, the switch SW1 is on and connects the node N1 to the node N2, and the switch SW2 is off. Error amplifier 2erAMP receives an input voltage V (equal to the second input voltage) _in And the third voltage applied to the nodes N1 and N2 is equal to the second inputThe voltage is multiplied by the amplification gain. For example, assuming that the ratio of the resistors R1 and R2 is 24, the third voltage and the second input voltage are 15V and 0.6V, respectively.

Note that the driving circuit 20dvrC including the resistors R1 and R2 and having the amplifying gain is merely for illustration, and the present application is not limited thereto. It is also within the scope of this application that the drive circuit may include other types of passive devices (e.g., capacitors) to have an amplification gain.

In other words, the driver circuit 20dvrC facilitates dynamic ventilation or dynamic venting. As shown in fig. 1, the space within the wearable sound device 10 may be divided into volumes 130chmF and 130chmB. Volume 130chmF may generally represent the volume within wearable sound device 10 that is or will be communicated to the ear canal, and volume 130chmB may generally represent the volume within wearable sound device 10 that is or will be communicated to the surrounding environment of wearable sound device 10. When port 113vnt is closed/sealed, volumes 130chmF and 130chmB are hardly connected, and a significant drop in Sound Pressure Level (SPL) at lower frequencies can be avoided and the auditory experience improved. When port 113vnt is formed in port device 10vntD, volumes 130chmF and 130chmB are connected via port 113vnt, allowing sound/air to vent from side to side, thereby relieving the pressure caused by the latch effect.

In the embodiment shown in FIG. 2, the LDO 2LDO can be used for the input voltage and the output voltage V _in,CP With a slight difference between them, the output voltage V is regulated _in,CP But the present application is not limited thereto. The charge pump 2PMP is used to boost the voltage, but is not limited thereto.

It is noted that reliability of the flap 111Fa may be problematic after a certain deformation is continuously maintained for a long time (due to the constant/fixed voltage received by the actuating portion 112 Ca). The lifetime of the vent device 10vntD may be increased if a flap may be varied between being tilted/bent up (as shown by flap 111Fa of part (a) of fig. 1) and being tilted/bent down (as shown by flap 111Fb of part (a) of fig. 1) during operation of the vent device 10 vntD.

For example, fig. 3 is a schematic diagram of a driving circuit 30dvrC according to an embodiment of the present invention. The driving circuit 10dvrC may be implemented by the driving circuit 30 dvrC. Unlike the driving circuit 20dvrC, the driving circuit 30dvrC may further include a switching module(s) 3spM (s is coupled between the nodes N1, N2 and the actuating portions 112Ca,112 Cb) to extend the service life.

When the vent device 10vntD is controlled to open the vent 113vnt, the exchange module 3spM is configured to exchange (e.g., periodically or randomly) a first voltage V between the actuation portions 112Ca and 112Cb _up And a second voltage V is exchanged between the actuating portions 112Ca and 112Cb _down . Accordingly, when the voltages Vo1/Vo2 applied to the actuation portions 112Ca/112Cb alternate between the first voltage and the second voltage to change the deformation of the actuation portions 112Ca/112Cb (thereby increasing the lifetime), the free ends of the flaps 111Fa and the free ends of the flaps 111Fb may be separated by a distance sufficient to create the through openings 113vnt.

When the vent device 10vntD is controlled to seal the vent 113vnt, the switching module 3spM is used to apply the third voltage to the actuation portions 112Ca and 112Cb. For example, node N1 may be coupled/connected to actuator 112Ca (voltage Vo1 in fig. 3 indicates the position of actuator 112 Ca), and node N2 may be coupled/connected to actuator 112Cb (voltage Vo2 in fig. 3 indicates the position of actuator 112 Cb).

In other words, in the first phase/period, the switching module 3spM can switch the node N1 (in V _N1 Represented) is transmitted to the actuator 112Ca as a voltage Vo1, and the voltage (represented by V) at the node N2 _N2 Indicated) is transferred to the actuation portion 112Cb as a voltage Vo2; in the second phase/period, the switching module 3spM can supply the voltage V _N1 To the actuator 112Cb as the voltage Vo2 and to output the voltage V _N2 Is transmitted to the actuator 112Ca as a voltage Vo1.

Fig. 4 is a schematic diagram of switching modules 4spMa and 4spMb according to an embodiment of the present invention. The switching module 3spM can be implemented by switching modules 4spMa or 4 spMb.

The switch module 4spMa shown in fig. 4 (a) may include a switch 4S12 (for selectively coupling the actuator 112Ca to the first voltage or the second voltage) and a switch 4S34 (for selectively coupling the actuator 112Cb to the second voltage or the first voltage). In other words, the switches 4S12 and 4S34 (e.g., double pole double throw switches) can be controlled by a control signal such that the actuating portions 112Ca and 112Cb are simultaneously switched to the nodes N1 and N2, respectively, or the actuating portions 112Ca and 112Cb are simultaneously switched to the nodes N2 and N1, respectively.

The switch module 4spMb shown in part (b) of fig. 4 may include a switch 4S1 (coupled between the actuator 112Ca and the node N1), a switch 4S2 (coupled between the actuator 112Ca and the node N2), a switch 4S3 (coupled between the actuator 112Cb and the node N1), and a switch 4S4 (coupled between the actuator 112Cb and the node N2). During a period when the first voltage is applied to the actuation portion 112Ca and the second voltage is applied to the actuation portion 112Cb to open the opening 113vnt, the switches 4S1 and 4S4 are turned on and the switches 4S2 and 4S3 are turned off. In another period in which the second voltage is applied to the actuation portion 112Ca and the first voltage is applied to the actuation portion 112Cb to open the through-port 113vnt, the switches 4S2 and 4S3 are turned on and the switches 4S1 and 4S4 are turned off.

The driving circuit can utilize the characteristics (such as capacitance characteristics) of the actuating portion to save power by energy recovery. Fig. 5 is a schematic diagram of a switching module 5spM according to an embodiment of the invention. The switching module 3spM can be implemented by the switching module 5spM, and the switching module 5spM can include switches S1-S4, an inductor 5IL, and a switching module 5SW.

The switches S1 and S2 are controlled by control signals 5CTR1 and 5CTR2, respectively, such that a node N1' coupled to the actuator 112Ca (e.g., an electrode thereof) can be used to generate a first voltage V at the node N1 _up Or a second voltage V of node N2 _down To the actuator 112Ca. The switches S3 and S4 are controlled by control signals 5CTR2 and 5CTR1, respectively, such that a node N2' coupled to the actuation portion 112Cb (e.g., an electrode thereof) can apply a second voltage V _down Or a first voltage V _up To the actuator 112Cb.

The switching module 5SW controlled by the control signal 5CTR3 can draw current not only from node N2 'to node N1' but also from node N1 'to node N2'. By the exchanging operation of the exchanging module 5spM, most of the energy stored in the actuator 112Ca or 112Cb can be recovered (and reused by the actuator 112Cb or 112 Ca) to reduce power consumption.

Fig. 6 is a schematic diagram of a switching module 6spM according to an embodiment of the invention. The switching module 3spM can be implemented by the switching module 6spM, and the switching module 6spM can include switches SWH1, SWL1, SWH2, SWL2, an inductor 6IL and a switching module 6SW. The switches SWH1, SWL1, SWH2, and SWL2 may include buffers 6bH1,6bL1,6bH2,6bL2, and transistors (transistors) 6tH1,6tL1,6tH2,6tL2, respectively. The switching module 6SW may include switches SWrc1 and SWrc2, and the switches SWrc1 and SWrc2 may include buffers 6bRC1,6bRC2 and transistors 6tRC1,6tRC 2.

Fig. 7 is a timing diagram of voltages Vo1, vo2, a current 6I, and control signals 6rc1,6rc2,6CTR1 (or 5CTR 1), 6CTR2 (or 5CTR 2), 5CTR3 of the switch module 6spM (or the switch module 5spM of fig. 5) shown in fig. 6. For ease of illustration, the switch (e.g., SWH 1) is conductive when the corresponding control signal (e.g., 6CTR 1) is in a high state (e.g., logic "1"), and is non-conductive or is off when the corresponding control signal is in a low state (e.g., logic "0").

At a first voltage V _up Applied to the actuator 112Ca and a second voltage V _down During a period TT1 applied to the actuation portion 112Cb to open the opening 113vnt, the switches SWH1 and SWL2 are turned on (to place the voltage V of the node N1' _N1' Increased to a first voltage V _up And will be the voltage V at node N2 _N2' Reduced to a second voltage V _down ) The switches SWL1, SWH2 are off. In the period TT1, the driving circuit supplies the voltage V _N1' Or V _up As the voltage Vo1, and provides the voltage V _N2' Or V _down As voltage Vo2. Accordingly, as shown in fig. 7, the free ends of the flaps 111Fa swung upward are higher than the anchored ends of the flaps 111Fa and 111Fb, and the free ends of the flaps 111Fb swung downward are lower than the anchored ends of the flaps 111Fa and 111Fb. Since the switch SWrc2 is turned off, the switching module 6SW is turned off at the period TT 1.

In the period CND1 (between the period TT1 which can be the first period and the period TT2 which can be the second period) (which can be the third period), the switches SWH1, SWL1, SWH2, and SWL2 are turned off, and the switches SWrc1 and SWrc2 are turned on. The current 6I flowing through the inductor 6IL is continuously decreasing (i.e. along the line indicated in fig. 6In the opposite direction of the positive direction) until the voltage Vo1 applied to the actuation portion 112Ca is equal to the voltage Vo2 applied to the actuation portion 112Cb. Then, the current 6I starts to increase until it reaches 0. By means of the current 6I, the charge stored in the capacitor 6PZTc1 (formed between a top electrode of the actuator 112Ca and a bottom electrode having the voltage Vbtm) can be transferred to the capacitor 6PZTc1 (formed between a top electrode of the actuator 112Cb and a bottom electrode having the voltage Vbtm), so that the voltages Vo1 and Vo2 can be effectively exchanged. (in an embodiment, the voltage Vbtm may be grounded.) from the first voltage V based on the voltage Vo1 _up Reduced to a second voltage V _down And the voltage Vo2 is from the second voltage V _down Rising to a first voltage V _up Flap 111Fa may swing downward and flap 111Fb may swing upward.

At a second voltage V _down Applied to the actuator 112Ca and a first voltage V _up During a period TT2 applied to the actuation portion 112Cb to open the opening 113vnt, the switches SWL1 and SWH2 are turned on (to apply the voltage V _N1' Reduced to a second voltage V _down And apply voltage V _N2' Increased to a first voltage V _up ) The switches SWH1, SWL2 are off. In the period TT2, the driving circuit supplies the voltage V _N1' Or V _up As the voltage Vo2, and provides the voltage V _N2' Or V _down As voltage Vo1. Accordingly, as shown in fig. 7, the free ends of the flaps 111Fa swung downward are lower than the anchored ends of the flaps 111Fa and 111Fb, and the free ends of the flaps 111Fb swung upward are higher than the anchored ends of the flaps 111Fa and 111Fb. Since the switch SWrc1 is turned off, the switching module 6SW is turned off at the period TT 2.

In a period CND2 (between the period TT2 and the period TT 1) (which may be the third period), the switches SWH1, SWL1, SWH2, and SWL2 are turned off, and the switches SWrc1 and SWrc2 are turned on. The current 6I flowing through the inductor 6IL continues to increase (i.e., in the positive direction designated in fig. 6) until the voltage Vo1 equals the voltage Vo2. Then, the current 6I starts to decrease until it reaches 0. By means of the current 6I, the charge stored in the capacitor 6PZTc2 of the actuator 112Cb can be transferred to the capacitor 6PZTc1 of the actuator 112Ca, so that the voltages Vo1 and Vo2 can be effectively exchanged. From the second voltage V based on the voltage Vo1 _down Rising to a first voltage V _up And the voltage Vo2 is from the first voltage V _up Reduced to a second voltage V _down Flap 111Fa may swing upward and flap 111Fb may swing downward.

Specifically, at the beginning of period CND2, due to the voltage difference between voltages Vo1 and Vo2, inductor 6IL may conduct current 6I such that current 6I may flow from actuating portion 112Cb (e.g., its top electrode) to actuating portion 112Ca (e.g., its top electrode) and may resist current variation of current 6I. The capacitances 6PZTc1 and 6PZTc2, the inductance 6IL, the resistance 6r1 of the actuator 112Ca, and the resistance 6r2 of the actuator 112Cb can be regarded as RLC circuits. In one embodiment, the RLC circuit may form an RLC oscillator (oscillator) that may be under damped (unrerdamped) oscillation such that after switches SWrc1 and SWrc2 are conductive, current 6I rises sharply, almost assuming a half wave shape resembling the first peak of a sine wave. Accordingly, the current 6I flowing from the actuating portion 112Cb to the actuating portion 112Ca will be drawn, which corresponds to the amount of electrons or charges removed from or transferred to the capacitor 6PZTc2 within the period CND2 or after the period CND 2.

Similarly, during the period CND1 or after the period CND1, the amount of electrons or charges will be (more or less) transferred back to the capacitor 6PZTc2 via the switching module 6SW and the inductor 6 IL. Accordingly, most of the energy stored in the actuation portion 112Ca or 112Cb (e.g., the capacitor 6PZTc1 or 6PZTc 2) may be recovered/recycled within the period CND1 or CND2 (or after the period CND1 or CND 2), such that power consumption is significantly reduced due to the switching action of the switching module 6 spM.

As shown in fig. 7, the start time of the period CND1/CND2 is delayed by the end time of the period TT1/TT2 by a period of time, and the end time of the period CND1/CND2 is delayed by the start time of the period TT2/TT1 by a period of time. Alternatively, the start time of the period CND1/CND2 coincides/coincides (co-code)/simultaneously/synchronizes with the end time of the period TT1/TT2, and the end time of the period CND1/CND2 coincides/simultaneously/synchronizes with the start time of the period TT2/TT 1.

In an embodiment, the switching frequency of the switching module 6SW may be set to a lower value (e.g., below 10 hz) to reduce power consumption or minimize switching acoustic noise (noise), but the application is not limited thereto (due to the lower sensitivity of human auditory perception to low frequencies). Differential/antisymmetric (antisymmetric) motion or movement of flaps 111Fa and 111Fb may promote a net zero volume displacement (net zero volume displacement), which may also minimize exchanged acoustic noise.

For details on the energy recovery principle of the exchange modules 5spM and 6spM reference is made to U.S. patent application No. 7/133,655, the disclosure of which is incorporated by reference in its entirety and made a part of the present specification.

FIG. 8 is a schematic diagram of LDOs 8LDO1 and 8LDO2 according to an embodiment of the present invention. The low dropout regulator 2LDO may be implemented by the low dropout regulator 8LDO1 or 8LDO 2.

The low dropout regulator 8LDO1 shown in part (a) of fig. 8 may include resistors 8R1a,8R2a, an amplifier 8AMP1, and a transistor 8T1. An input terminal of the amplifier 8AMP1 can monitor the output voltage V _in,CP The partial voltage (determined by the ratio of resistors 8R1a to 8R2 a). If the output voltage V _in,CP Is different from the voltage 8Vin of the other input end (or the amplified output end Nout) of the amplifier 8AMP1, the driving (voltage) of the transistor 8T1 is changed to maintain the output voltage V _in,CP Constant.

The low dropout regulator 8LDO2 shown in part (b) of fig. 8 may include resistors 8R1b,8R2b, an amplifier 8AMP2, and a transistor 8T2. An input terminal of the amplifier 8AMP2 can monitor the output voltage V _in,CP The partial voltage (determined by the ratio of resistors 8R1b to 8R2 b). If the output voltage V _in,CP Is different from the stabilized reference voltage Vdc2 at the other input terminal of the amplifier 8AMP1, the driving (voltage) of the transistor 8T2 is changed to maintain the output voltage V _in,CP Constant.

Fig. 9 is a schematic diagram of charge pumps 9PMP1 and 9PMP2 according to an embodiment of the invention. The charge pump 2PMP may be implemented by a charge pump 9PMP1,9PMP2, or a Dickson charge pump.

The charge pump 9PMP1 shown in part (a) of fig. 9 may include capacitors 9C1a-9C5a (for storing charges to raise voltages) and diodes (diode) 9D1-9D5 (for transferring charges between the capacitors 9C1a-9C5 a), and it is necessary to input signals 9S1a and 9S2a opposite to each other to the charge pump 9PMP1.

The charge pump 9PMP2 shown in part (b) of fig. 9 may include capacitors 9C1b-9C4b (for storing charges to raise voltages) and transistors 9T1-9T4 (for transferring charges between the capacitors 9C1b-9C4 b), and it is necessary to input signals 9S1b and 9S2b opposite to each other to the charge pump 9PMP2.

In addition, in order to extend the service life, in an embodiment, the input to the actuation portion 112Ca or 112Cb (e.g., an electrode or a point thereof) may be a superposition (superposition)/combination of an alternating current (alternating current) waveform and a Direct Current (DC) waveform.

For example, returning to part (a) of fig. 1, when the port device 10vntD is controlled to open the port 113vnt, the driving circuit 10dvrC may generate a first signal (which may include a first voltage and a first ac component) at node N1 and a second signal (which may include a second voltage and a second ac component) at node N2 to change the input to the actuation portion 112Ca or 112Cb over time (e.g., periodically or randomly). In an embodiment, the first and second ac components may be opposite to each other such that the combination of the first and second ac components is zero, such that a net zero volume displacement may be generated to minimize acoustic output caused by the first and second ac components. The first ac component and the second ac component may be less than an average of the first voltage and the second voltage. The larger the first alternating current component or the second alternating current component, the larger the average value of the first voltage and the second voltage may be.

In addition, FIG. 10 is a schematic diagram of another embodiment of the present invention that provides a long life scenario. As shown in fig. 10, the port device 11vntD further includes a member 111P disposed between the free ends of the flaps 111Fa and 111Fb to extend the distance between the free ends of the flaps 111Fa and 111Fb.

When the port device 11vntD is controlled to open the port 113vnt as shown in part (a) of fig. 10, the voltages Vol and Vo2 can be voltages V _down For example 0V (or ground) or floating (float). Therefore, no electrical stress (electrical stress) is applied to the vent device 11vntD and the lifetime can be prolonged.

Another oneIn aspect, when the vent device 11vntD is controlled to close the vent 113vnt, the voltage Vo1 may be the third voltage V _seal A third AC component is added, and the voltage Vo2 can be a third voltage V _seal A fourth alternating current component is added. In other words, when the port device 11vntD is controlled to close the port 113vnt as shown in part (b) of fig. 10, the driving circuit 10dvrC may generate a third signal (which may include a third voltage V) at the node N1 _seal And a third alternating current component) and generates a fourth signal (which may include a third voltage V) at node N2 _seal A fourth alternating current component). The third and fourth ac components may be opposite to each other such that the combination of the third and fourth ac components is zero, such that a net zero volume displacement may be generated to minimize acoustic output caused by the third and fourth ac components. Alternatively, the waveform of the third alternating current component is the same as the waveform of the fourth alternating current component. The third alternating current component and the fourth alternating current component may be relatively small compared to the third voltage such that the port 113vnt is substantially sealed/closed. The larger the third or fourth alternating current component, the larger the third voltage may be. The amplitude (amplitude) of the third alternating current component or the fourth alternating current component may be different from the amplitude of the first alternating current component or the second alternating current component.

Note that the voltage V is applied _down An alternative to (e.g., 0V) to the actuator may be to float the actuator (i.e., not apply a voltage to the actuator). In this case, the free ends of the petals may hang down and below their anchoring ends. The floating actuating part can reach and apply a voltage V _down To a similar effect of the actuating portion, even more power saving is possible.

Throughout the specification, an ac waveform may encompass waveforms that are not of a dc nature. Thus, any non-pure DC waveform can be considered an AC waveform. The term "voltage" may mean a dc waveform or a waveform that does not vary over time; the term "signal" may mean an alternating current waveform or a waveform that varies over time. The term "/" may mean the term "or".

In one embodiment, the application processor (application processor) can be used to process the input from the sensor (sensor) and issue a command to control the driving circuit 10dvrC such that a first voltage or a third voltage is applied to node N1 and a second voltage or a third voltage is applied to node N2 to open or seal the port 113vnt. For example, the application processor may be used to turn on or off the switch SW1 or SW2. The sensor may be a feedforward microphone (feedforward microphone) to detect external noise, a feedback microphone to detect acoustic sounds caused by a latch-up effect, or a motion sensor to detect acoustic sounds caused by body motion (e.g., jogging).

Any mechanism that creates or blocks a vent may be used as the wearable sound device 10 of the present invention. For details or alternative embodiments of the wearable sound device, the vent device, or the driver circuit, reference may be made to U.S. patent application Ser. Nos. 16/920,384, 17/008,580, 17/133,655, 17/842,810, 17/344,980, 17/344,983, 17/720,333, 18/048,852, 18/172,346, 18/303,599, the disclosures of which are incorporated herein by reference in their entirety.

References throughout this specification to "first," "second," etc. are intended to merely distinguish between different devices and do not necessarily impose an order, priority, or temporal order of method execution or any limitation on the devices. The described embodiments may be combined in various ways without contradiction.

In summary, the present application designs a driving circuit to open or seal the through hole of the through hole device, so as to reduce the blocking effect. The switching module of the driving circuit is used for (simultaneously) switching the first voltage from the first actuating part to the second actuating part and switching the second voltage from the second actuating part to the first actuating part, so that the service life of the port device can be prolonged. By utilizing the characteristics of the port device, the switching module of the driving circuit can be designed to recover energy and reduce power consumption. The drive circuit (outputting a signal comprising a (direct current) voltage and an alternating current component to the port device) may also increase the lifetime of the port device.

The foregoing description is only of the preferred embodiments of the invention, and all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (28)

1. A driving circuit for driving a port device, the driving circuit comprising:

a first node and a second node; and

an amplifying circuit including an amplifying output coupled to the first node;

wherein the port device comprises a membrane structure and an actuating element;

wherein the membrane structure comprises a first flap and a second flap;

the actuating piece comprises a first actuating part arranged on the first flap and a second actuating part arranged on the second flap;

wherein the first node is coupled to the first actuating portion, and the second node is coupled to the second actuating portion;

wherein the port device is used for being controlled to open a port or seal the port;

when the port device is controlled to open the port, the driving circuit generates a first voltage at the first node and generates a second voltage at the second node;

when the port device is controlled to seal the port, the driving circuit generates a third voltage at the first node and the second node;

the first voltage is greater than the third voltage, and the third voltage is greater than the second voltage.

2. The driving circuit of claim 1, wherein the amplifying circuit comprises an error amplifier;

the amplifying circuit has an amplifying gain.

3. The driving circuit of claim 2, wherein the error amplifier receives a first input voltage when the port means is controlled to open the port, the first voltage being the first input voltage multiplied by the amplification gain.

4. The driving circuit of claim 3, further comprising a switch coupled between the first node and the second node, wherein the switch is turned off when the port device is controlled to open the port.

5. The driving circuit of claim 2, wherein the error amplifier receives a second input voltage when the port means is controlled to seal the port, the third voltage being the second input voltage multiplied by the amplification gain.

6. The driving circuit of claim 5, further comprising a switch coupled between the first node and the second node, wherein the switch is conductive when the port device is controlled to seal the port.

7. The driving circuit of claim 2, further comprising a low dropout regulator coupled between the error amplifier and the first node.

8. The driving circuit of claim 2, further comprising a charge pump coupled between the error amplifier and the first node.

9. The driving circuit of claim 1, further comprising:

a switching module;

wherein the exchange module is coupled between the first actuating part and the second actuating part;

the exchange module is used for exchanging the first voltage from the first actuating part to the second actuating part and exchanging the second voltage from the second actuating part to the first actuating part.

10. The driving circuit as recited in claim 9 wherein the switching module comprises a first switch, a second switch, a third switch and a fourth switch;

wherein the first switch and the second switch are coupled to the first actuating part;

wherein the third switch and the fourth switch are coupled to the second actuating portion.

11. The driving circuit as recited in claim 10 wherein the switching module comprises an inductor and a switching module;

the inductor and the switching module are coupled between the first actuating part and the second actuating part.

12. The driving circuit of claim 11, wherein during a first period when the first voltage is applied to the first actuating portion and the second voltage is applied to the second actuating portion, the first switch and the fourth switch are turned on, the second switch and the third switch are turned off, and the switching module is turned off;

wherein, in a second period in which the second voltage is applied to the first actuating portion and the first voltage is applied to the second actuating portion, the first switch and the fourth switch are turned off, the second switch and the third switch are turned on, and the switching module is turned off;

in a third period between the first period and the second period, the first switch, the second switch, the third switch and the fourth switch are turned off, and the switching module is turned on.

13. The driving circuit of claim 11, wherein the switching module comprises a fifth switch and a sixth switch;

wherein the fifth switch is coupled between the inductor and the first actuating part;

the sixth switch is coupled between the inductor and the second actuating portion.

14. The driving circuit of claim 10, wherein the first switch is coupled between the first actuating portion and the first node;

wherein the second switch is coupled between the first actuating portion and the second node;

wherein the third switch is coupled between the second actuating portion and the first node;

the fourth switch is coupled between the second actuating portion and the second node.

15. The driving circuit of claim 14, wherein the first switch and the fourth switch are turned on and the second switch and the third switch are turned off during a first period of time when the first voltage is applied to the first actuation portion and the second voltage is applied to the second actuation portion;

wherein, in a second period in which the second voltage is applied to the first actuating portion and the first voltage is applied to the second actuating portion, the first switch and the fourth switch are turned off, and the second switch and the third switch are turned on.

16. The driving circuit of claim 1, wherein the driving circuit generates a first signal at the first node and a second signal at the second node;

wherein the first signal includes a first ac component;

wherein the second signal includes a second alternating current component.

17. A wearable sound device, comprising:

the device comprises a vent device and an actuating piece, wherein the vent device comprises a membrane structure and an actuating piece, the membrane structure comprises a first flap and a second flap, and the actuating piece comprises a first actuating part arranged on the first flap and a second actuating part arranged on the second flap;

a driving circuit including a first node and a second node;

wherein the first actuating portion and the second actuating portion are coupled to the first node and the second node;

wherein the port device is used for being controlled to open a port or seal the port;

when the port device is controlled to open the port, the driving circuit generates a first voltage at the first node and generates a second voltage at the second node;

when the port device is controlled to seal the port, the driving circuit generates a third voltage at the first node and the second node;

the first voltage is greater than the third voltage, and the third voltage is greater than the second voltage.

18. The wearable sound device of claim 17, wherein the driving circuit comprises an amplifying circuit, and the amplifying circuit comprises an error amplifier and has an amplifying gain.

19. The wearable sound device of claim 17, wherein the driving circuit comprises a low dropout regulator and a charge pump coupled between the error amplifier and the first node.

20. The wearable sound device of claim 17, wherein the driver circuit comprises:

a switching module;

wherein the exchange module is coupled between the first actuating part and the second actuating part;

the exchange module is used for exchanging the first voltage from the first actuating part to the second actuating part and exchanging the second voltage from the second actuating part to the first actuating part.

21. The wearable sound device of claim 17, wherein when the port device is controlled to open the port, the first flap is actuated to move in a first direction and the second flap is actuated to move in a second direction opposite the first direction for a first period of time, and the first flap is actuated to move in the second direction and the second flap is actuated to move in the first direction for a second period of time.

22. The wearable sound device of claim 21, wherein during the first period of time, the first actuation portion receives the first voltage and the second actuation portion receives the second voltage;

wherein, in the second period, the first actuating part receives the second voltage, and the second actuating part receives the first voltage.

23. A vent apparatus, comprising:

a first flap and a second flap; and

a member disposed between a free end of the first flap and a free end of the second flap;

wherein the port device is used for being controlled to open a port or seal the port;

wherein the first flap and the second flap flex downward when the port device is controlled to open the port;

wherein the first flap and the second flap are actuated to maintain a flat position when the port device is controlled to seal the port.

24. The vent apparatus of claim 23, further comprising:

a first actuating portion disposed on the first flap; and

a second actuating portion disposed on the second flap;

wherein the first actuating portion and the second actuating portion receive a voltage when the port device is controlled to seal the port.

25. The vent apparatus of claim 23, further comprising:

a first actuating portion disposed on the first flap; and

a second actuating portion disposed on the second flap;

when the port device is controlled to seal the port, the first actuating portion receives a voltage plus a first alternating current component, and the second actuating portion receives the voltage plus a second alternating current component.

26. A vent apparatus, comprising:

a first flap and a second flap;

wherein when the port device is controlled to open the port, the first flap is actuated to move in a first direction and the second flap is actuated to move in a second direction opposite the first direction during a first period of time, and the first flap is actuated to move in the second direction and the second flap is actuated to move in the first direction during a second period of time.

27. The vent apparatus of claim 26, further comprising:

a first actuating portion disposed on the first flap; and

a second actuating portion disposed on the second flap;

wherein, in the first period, the first actuating part receives a first voltage, and the second actuating part receives a second voltage;

wherein, in the second period, the first actuating part receives the second voltage, and the second actuating part receives the first voltage.

28. The vent device of claim 27, wherein the first actuator and the second actuator receive a third voltage when the vent device is controlled to seal the vent;

the first voltage is greater than the third voltage, and the third voltage is greater than the second voltage.