WO2021212718A1 - Wireless earbud resetting circuit, wireless earbud, and resetting method - Google Patents

Abstract

The present invention relates to the technical field of wireless earbuds, and disclosed are a wireless earbud resetting circuit, a wireless earbud, and a resetting method. The wireless earbud comprises a communication wire and a ground wire. The wireless earbud resetting circuit comprises: a detection circuit, the detection circuit being connected to the communication wire and the ground wire, and the detection circuit being configured to detect connection of the communication wire and the ground wire; a resetting circuit, the resetting circuit being connected to the detection circuit and the ground wire, and the resetting circuit being configured to output a resetting signal; and a wireless communication chip, the wireless communication chip being connected to the resetting circuit and the ground wire, and the wireless communication chip being configured to perform resetting according to the resetting signal. Hardware circuits are used in a resetting process, which is more reliable than software resetting in the prior art.

Description

Wireless earphone reset circuit, wireless earphone and reset method Technical field

The present invention relates to the technical field of wireless earphones, in particular to a wireless earphone reset circuit, a wireless earphone and a reset method.

Background technique

At present, one way to realize the reset of the wireless headset is to send a command through the communication line of the wireless headset to perform a software reset. However, when the headset is busy or the software is faulty, the software cannot be reset, and the reliability is not high.

Summary of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. For this reason, the present invention provides a wireless headset reset circuit, which can realize hardware reset and is more reliable.

The invention also provides a wireless earphone.

The invention also provides a method for resetting the wireless earphone.

In the first aspect, an embodiment of the present invention provides a wireless headset reset circuit for resetting a wireless headset, the wireless headset includes a communication wire and a ground wire, and the wireless headset reset circuit includes:

A detection circuit, the detection circuit is used to connect with the communication line and the ground wire, and the detection circuit is used to detect the connection between the communication wire and the ground wire;

A reset circuit, the reset circuit is connected to the detection circuit and the ground, and the reset circuit is used to output a reset signal;

A wireless communication chip, the wireless communication chip is connected to the reset circuit and the ground wire, and the wireless communication chip is configured to reset the wireless headset according to the reset signal.

The wireless headset reset circuit of the embodiment of the present invention has at least the following beneficial effects:

The detection circuit detects whether the communication wire of the headset and the ground wire are connected, if connected, a reset signal is output to the wireless communication chip through the reset circuit, and the wireless communication chip is reset according to the reset signal to realize the headset reset. Since hardware circuits are used in the reset process, it is more reliable than the software reset in the prior art.

According to other embodiments of the wireless headset reset circuit of the present invention, the communication wire includes a communication wire contact, and the ground wire includes a ground wire contact;

If the communication wire contact and the ground wire contact are short-circuited, the communication wire and the ground wire are connected.

According to other embodiments of the wireless headset reset circuit of the present invention, the detection circuit includes a first switch, a second switch, and a first capacitor, and the first switch is connected to the communication line, the second switch, and the communication line, respectively. The first capacitor is connected, and the first capacitor is connected to the reset circuit.

According to other embodiments of the wireless headset reset circuit of the present invention, the reset circuit includes a third switch, and the first capacitor is connected to the third switch.

According to other embodiments of the wireless headset reset circuit of the present invention, the first switch includes a first MOS tube, the second switch includes a second MOS tube, and the third switch includes a third MOS tube.

According to other embodiments of the wireless headset reset circuit of the present invention, the gate of the first MOS transistor is connected to the communication line and the gate of the second MOS transistor, and the source of the first MOS transistor is Connected to the power input terminal, the drain of the first MOS transistor is respectively connected to the drain of the second MOS transistor and one end of the first capacitor, the source of the second MOS transistor is grounded, and the first MOS transistor is grounded. The other end of the capacitor is grounded, one end of the first capacitor is connected to the gate of the third MOS transistor, and the drain of the third MOS transistor is respectively connected to the power input terminal and the wireless communication chip, so The source of the third MOS transistor is grounded.

According to other embodiments of the wireless headset reset circuit of the present invention, the wireless communication chip is a Bluetooth chip.

In the second aspect, an embodiment of the present invention provides a wireless headset, including a power module and the wireless headset reset circuit of any one of the above embodiments, the power module and the detection circuit, the reset circuit, and the wireless headset The communication chip is connected, and the power supply module is used to supply power to the detection circuit, the reset circuit, and the wireless communication chip.

According to some other embodiments of the wireless headset of the present invention, the wireless headset is a Bluetooth headset.

In a third aspect, an embodiment of the present invention provides a wireless headset resetting method for resetting a wireless headset, the wireless headset includes a communication wire and a ground wire, and the wireless headset resetting method includes:

Detecting whether the communication line and the ground line are connected;

If connected, output reset signal;

The wireless headset is reset according to the reset signal.

Description of the drawings

Figure 1 is a block diagram of a wireless headset reset circuit in an embodiment of the present invention;

Figure 2 is a circuit schematic diagram of a wireless headset reset circuit in an embodiment of the present invention;

Fig. 3 is a schematic flowchart of a method for resetting a wireless headset in an embodiment of the present invention.

Reference signs: detection circuit 100; reset circuit 200; wireless communication chip 300.

Detailed ways

In the following, the concept of the present invention and the technical effects produced by it will be clearly and completely described in conjunction with the embodiments, so as to fully understand the purpose, features and effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work belong to The scope of protection of the present invention.

In the description of the present invention, if an orientation description is involved, such as "up", "down", "front", "rear", "left", "right", etc., the orientation or positional relationship indicated is based on the drawings. The orientation or positional relationship of is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention . If a feature is called "set", "fixed", "connected", or "installed" on another feature, it can be directly set, fixed, or connected to another feature, or indirectly set, fixed, or connected , Installed on another feature.

In the description of the embodiments of the present invention, if it refers to "several", it means more than one, if it refers to "multiple", it means two or more, if it refers to "greater than", "less than", "more than ", should be understood as not including the number, if it involves "above", "below", and "within", it should be understood as including the number. If “first” and “second” are involved, it should be understood as used to distinguish technical features, but cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating what is indicated The sequence of technical features.

As shown in FIG. 1, it is a block diagram of a wireless headset reset circuit in an embodiment of the present invention. The wireless headset reset circuit is used to reset the wireless headset, the wireless headset includes a communication wire and a ground wire, and the wireless headset reset circuit includes:

The detection circuit 100 is used for connecting with the communication line and the ground wire, and the detection circuit 100 is used for detecting the connection between the communication line and the ground wire;

The reset circuit 200 is connected to the detection circuit 100 and the ground wire, and the reset circuit 200 is used to output a reset signal;

The wireless communication chip 300 is connected to the reset circuit 200 and the ground wire, and the wireless communication chip 300 is used to reset the wireless headset according to the reset signal.

In this embodiment, the detection circuit 100 detects whether the communication line of the headset and the ground line are connected. If connected, the reset circuit 200 outputs a reset signal to the wireless communication chip 300, and the wireless communication chip 300 resets according to the reset signal to realize the headset reset. Since hardware circuits are used in the reset process, it is more reliable than the software reset in the prior art.

Further, the communication wire of the wireless headset includes a communication wire contact, and the ground wire includes a ground wire contact. If the communication wire contact and the ground wire contact are short-circuited, the communication wire is connected to the ground wire.

The communication wire contact and the ground wire contact are the exposed contacts of the wireless headset. When the wireless headset is not placed in the earphone box, the communication wire contact and the ground wire contact can be short-circuited through a wire to connect the communication Connect the wire to the ground wire. After the communication line is connected to the ground line, the reset circuit 200 can output a reset signal for resetting.

The headset box of the wireless headset is provided with corresponding communication line contacts and ground contacts. When the wireless headset is placed in the headset box, the communication line contacts of the wireless headset and the communication line contacts of the headset box touch and connect. The ground contact of the earphone and the ground contact of the earphone box are touch-connected. A switch (which can be a MOS switch tube or a relay or other type of switch) is arranged between the communication line contact and the ground contact of the earphone box. When the wireless earphone is placed in the earphone box, the earphone box sends a signal to control the above earphone box When the switch of is turned on, the communication line of the wireless headset and the ground line can be connected. After the communication line is connected to the ground line, the reset circuit 200 can output a reset signal for resetting. In the prior art, the wireless headset is placed in the headset box for resetting through the power cord of the headset. However, after each reset, the wireless headset needs to be reconnected to the mobile phone again, resulting in poor user experience. The reset circuit of this embodiment can solve this problem well and improve the user experience.

Further, the detection circuit 100 includes a first switch, a second switch, and a first capacitor. The first switch is connected to the communication line, the second switch, and the first capacitor, respectively, and the first capacitor is connected to the reset circuit 200.

Further, the reset circuit 200 includes a third switch, and the first capacitor is connected to the third switch.

In some embodiments, the first switch includes a first MOS transistor, the second switch includes a second MOS transistor, and the third switch includes a third MOS transistor. It can be understood that the first switch, the second switch, and the third switch may also adopt other types of switches, such as relays.

As shown in FIG. 2, it is a circuit principle diagram of a wireless headset reset circuit in an embodiment of the present invention. TX/RX is the signal sending/receiving terminal, the signal sending/receiving terminal TX/RX and the first MOS transistor Q1 are connected through a communication line, and the first resistor R1 is a pull-up resistor of the communication line. BT_RESET is the reset signal output terminal, which is connected to the wireless communication chip 300.

The detection circuit 100 includes a first MOS transistor Q1, a second MOS transistor Q2, a third resistor R3, and a first capacitor C1, and the reset circuit 200 includes a second resistor R2 and a third MOS transistor Q3. The gate of the first MOS transistor Q1 is connected to the communication line and the gate of the second MOS transistor Q2, the source of the first MOS transistor Q1 is connected to the power input terminal VCC, and the drain of the first MOS transistor Q1 passes through the third resistor R3 Are respectively connected to the drain of the second MOS transistor Q2 and one end of the first capacitor C1, the source of the second MOS transistor Q2 is grounded, the other end of the first capacitor C1 is grounded, and one end of the first capacitor C1 is connected to the third MOS transistor Q3 The drain of the third MOS transistor Q3 is connected to the power input terminal VCC through the second resistor R2, the drain of the third MOS transistor Q3 is also connected to the wireless communication chip 300 through the reset signal output terminal BT_RESET, the third MOS transistor Q3 is connected to the wireless communication chip 300 through the reset signal output terminal BT_RESET. The source of the tube Q3 is grounded. The above-mentioned grounding refers to the connection with the ground wire of the wireless headset.

As shown in Figure 2, the communication line and the ground line are connected through the switch S1. With reference to the above, when the wireless earphone is not put in the earphone box, the switch S1 can be a wire, through which the communication wire contact and the ground wire contact are short-circuited, and the communication wire and the ground wire can be connected; When the wireless earphone is put in the earphone box, the switch S1 can be a MOS switch tube or a relay or other types of switches. When the wireless earphone is put in the earphone box, the earphone box sends a signal to control the switch S1 to conduct, and then the wireless earphone communication can be realized. Connection of wire and ground wire. The specific principle is as follows:

When the communication wire of the wireless headset is connected to the ground wire, it is equivalent to that the switch S1 is turned on, and the voltage of the communication wire is 0V. The difference between the gate voltage and the source voltage of the first MOS transistor Q1 is the voltage value of the power input terminal VCC, the first MOS transistor Q1 is turned on, and the first capacitor C1 is charged through the third resistor R3, and the gate of the second MOS transistor Q2 The difference between the pole voltage and the source voltage is 0V, and the second MOS transistor Q2 is turned off. When the voltage on the first capacitor C1 rises to the turn-on voltage of the third MOS transistor Q3, the third MOS transistor Q3 is turned on, the reset signal output terminal BT_RESET is low, and the wireless communication chip 300 is reset.

When the communication wire of the wireless headset is not connected to the ground wire or the wireless headset has no communication, the voltage of the communication wire remains high. The difference between the gate voltage and the source voltage of the first MOS transistor Q1 is 0V, and the first MOS transistor Q1 is turned off. The difference between the gate voltage and the source voltage of the second MOS transistor Q2 is the voltage value of the power input terminal VCC, the second MOS transistor Q2 is turned on, and the gate voltage of the third MOS transistor Q3 is pulled to the ground, and the third MOS transistor Q3 The difference between the gate voltage and the source voltage is 0V, and the third MOS transistor Q3 is turned off. The reset signal output terminal BT_RESET is at a high level, and the wireless communication chip 300 is not reset.

When the wireless earphone communicates with the earphone box, the voltage of the communication line is in the alternate state of 0V and high level, and the gate voltage of the first MOS transistor Q1 and the second MOS transistor Q2 also alternately changes. However, due to the charging delay factor of the third resistor R3 and the first capacitor C1, the voltage of the first capacitor C1 rises slowly, and the second MOS transistor Q2 discharges quickly, resulting in the voltage on the first capacitor C1 not reaching the third MOS transistor. For the on-voltage of Q3, the third MOS transistor Q3 is turned off, the reset signal output terminal BT_RESET remains high, and the wireless communication chip 300 is not reset, so as to prevent the wireless headset from affecting normal use due to reset during wireless communication.

In this embodiment, the wireless communication chip 300 is a Bluetooth chip, and may also be other chips capable of realizing wireless communication, such as an NFC chip, etc., to realize the wireless communication function of the wireless headset.

Further, this embodiment also provides a wireless headset, including a power module and the wireless headset reset circuit in any of the above embodiments. The power module is respectively connected to the detection circuit 100, the reset circuit 200, and the wireless communication chip 300, and the power module supplies power to the detection circuit 100, the reset circuit 200, and the wireless communication chip 300 through the power input terminal VCC.

In this embodiment, the wireless communication chip 300 is a Bluetooth chip, and correspondingly, the wireless headset is a Bluetooth headset.

Further, this embodiment also provides a method for resetting a wireless headset, which is used to reset the wireless headset, and the wireless headset includes a communication wire and a ground wire. As shown in Figure 3, the wireless headset reset method includes:

S1, check whether the communication line and the ground line are connected, if it is, execute step S2; otherwise, the process ends;

S2, output reset signal;

S3. Reset the wireless headset according to the reset signal.

In this embodiment, the headset is reset by detecting whether the communication line of the headset and the ground line are connected, if connected, a reset signal is output, and the reset signal is performed according to the reset signal to realize the headset reset. For the specific process of the reset method, please refer to the above description of the reset circuit, which will not be repeated here.

The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments, and within the scope of knowledge possessed by those of ordinary skill in the technical field, it can also be made without departing from the purpose of the present invention. Various changes. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other if there is no conflict.

Claims (10)

A wireless headset reset circuit for resetting a wireless headset, the wireless headset includes a communication wire and a ground wire, and is characterized in that the wireless headset reset circuit includes: A detection circuit, the detection circuit is used to connect with the communication line and the ground wire, and the detection circuit is used to detect the connection between the communication wire and the ground wire; A reset circuit, the reset circuit is connected to the detection circuit and the ground, and the reset circuit is used to output a reset signal; A wireless communication chip, the wireless communication chip is connected to the reset circuit and the ground wire, and the wireless communication chip is configured to reset the wireless headset according to the reset signal. The wireless headset reset circuit according to claim 1, wherein the communication line includes a communication line contact, and the ground line includes a ground contact; If the communication wire contact and the ground wire contact are short-circuited, the communication wire and the ground wire are connected. The wireless headset reset circuit of claim 1, wherein the detection circuit includes a first switch, a second switch, and a first capacitor, and the first switch is connected to the communication line and the second switch respectively. , The first capacitor is connected, and the first capacitor is connected with the reset circuit. The wireless headset reset circuit according to claim 3, wherein the reset circuit comprises a third switch, and the first capacitor is connected to the third switch. The wireless earphone reset circuit according to claim 4, wherein the first switch includes a first MOS tube, the second switch includes a second MOS tube, and the third switch includes a third MOS tube. The wireless earphone reset circuit of claim 5, wherein the gate of the first MOS tube is connected to the communication line and the gate of the second MOS tube, and the gate of the first MOS tube The source is connected to the power input terminal, the drain of the first MOS transistor is respectively connected to the drain of the second MOS transistor and one end of the first capacitor, and the source of the second MOS transistor is grounded. The other end of the first capacitor is grounded, one end of the first capacitor is connected to the gate of the third MOS transistor, and the drain of the third MOS transistor is respectively connected to the power input terminal and the wireless communication chip , The source of the third MOS transistor is grounded. The wireless headset reset circuit according to any one of claims 1 to 6, wherein the wireless communication chip is a Bluetooth chip. A wireless earphone, comprising a power module and the wireless earphone reset circuit according to any one of claims 1 to 7, wherein the power module is respectively connected to the detection circuit, the reset circuit, and the wireless communication Chip connection, the power module is used to supply power to the detection circuit, the reset circuit, and the wireless communication chip. The wireless headset according to claim 8, wherein the wireless headset is a Bluetooth headset. A method for resetting a wireless earphone is used to reset a wireless earphone. The wireless earphone includes a communication wire and a ground wire. The method is characterized in that the method for resetting the wireless earphone includes: Detecting whether the communication line and the ground line are connected; If connected, output reset signal; The wireless headset is reset according to the reset signal.

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