Bluetooth audio connector and Bluetooth earphone

Abstract

The invention relates to the technical field of electronic equipment, and particularly provides a Bluetooth audio connector and a Bluetooth earphone. A Bluetooth audio connector comprises a male seat terminal, a female seat terminal and a controller, the male seat terminal is used for being connected with a main device, the female seat terminal is used for being connected with a power adapter, a power input pin of the controller is connected with a configuration channel CC2 pin of the male seat terminal through a pull-down resistor, and an audio signal pin is connected with a data signal pin of the male seat terminal. In the embodiment of the invention, the controller is continuously powered on by the Vconn power supply output by the CC2 pin to work, so that the power failure restart risk is greatly reduced in the plugging process of the power adapter, the Bluetooth communication with the slave equipment is more stable, and the Bluetooth communication stability and reliability are improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electronic equipment, and in particular to a Bluetooth audio connector and a Bluetooth headset. Background Art

[0002] Bluetooth Dongle accessories can enable Bluetooth devices to establish Bluetooth connections with various electronic devices and realize Bluetooth audio transmission. At present, some TWS (true wireless stereo) will be equipped with corresponding Dongle accessories to achieve low-latency and high-quality audio transmission with mobile phones. However, Dongle accessories will occupy the charging port of the mobile phone, thus affecting the charging of the mobile phone. Summary of the invention

[0003] In order to solve the problem of power failure and restart when the power supply of the dongle accessory is switched, the embodiments of the present disclosure provide a Bluetooth audio connector and a Bluetooth headset.

[0004] In a first aspect, an embodiment of the present disclosure provides a Bluetooth audio connector, comprising:

[0005] A male terminal and a female terminal, the male terminal is used to connect to a main device, and the female terminal is used to connect to a power adapter; and

[0006] The controller includes a power input pin and an audio signal pin, wherein the power input pin is connected to the configuration channel CC2 pin of the male terminal through a pull-down resistor, and the pull-down resistor is used to pull down the level of the CC2 pin; the audio signal pin is connected to the data signal pin of the male terminal, and the controller is used to send the audio data received through the audio signal pin to the slave device via Bluetooth.

[0007] In some implementations, the Bluetooth audio connector described in the present disclosure further includes:

[0008] The first power conversion module has an input end connected to the power pin of the female socket terminal and an output end connected to the power input pin of the controller.

[0009] In some implementations, the Bluetooth audio connector described in the present disclosure further includes:

[0010] A first power supply switch, comprising a first end, a second end and a first control end, wherein the first end is connected to a power pin of the female terminal, the second end is connected to a power pin of the male terminal, and the first control end is connected to the controller;

[0011] The controller is configured to control the first end and the second end of the first power supply switch to be conductive when it is detected that the power adapter is supplying power.

[0012] In some implementations, the Bluetooth audio connector described in the present disclosure further includes:

[0013] A protocol conversion circuit comprises a power supply end, a protocol receiving end and a protocol sending end, wherein the power supply end is connected to the power pin of the female terminal, the protocol receiving end is connected to the female terminal, and the protocol sending end is connected to the male terminal. The protocol conversion circuit is used to forward the charging protocol information between the main device and the power adapter.

[0014] In some embodiments, the protocol transmitting end is connected to the configuration channel CC1 pin of the male terminal, and the protocol conversion circuit is configured to convert the charging protocol information of the power adapter into PD protocol information and send it to the main device through the protocol transmitting end.

[0015] In some implementations, the Bluetooth audio connector described in the present disclosure further includes:

[0016] A second power supply switching switch comprises a third end, a fourth end and a second control end, the third end is connected to the power pin of the female socket terminal, the second end is connected to the power pin of the male socket terminal, and the second control end is connected to the protocol conversion circuit;

[0017] The protocol conversion circuit is configured to control the third terminal and the fourth terminal of the second power supply switch to be conductive when it is detected that the power adapter is supplying power.

[0018] In some implementations, the Bluetooth audio connector described in the present disclosure further includes:

[0019] The second power conversion module has an input end connected to the power pin of the female socket terminal and an output end connected to the power end of the protocol conversion circuit.

[0020] In some embodiments, the controller is a Bluetooth chip; or,

[0021] The controller includes a processing chip and a Bluetooth module, and the controller is configured to send the received audio data to the slave device through the Bluetooth module.

[0022] In some embodiments, the master device includes a mobile phone, the slave device includes a TWS headset, and the male terminal and the female terminal are Type-C terminals.

[0023] In a second aspect, an embodiment of the present disclosure provides a Bluetooth headset, comprising:

[0024] Headphones; and

[0025] According to the Bluetooth audio connector described in any embodiment of the first aspect, the Bluetooth audio connector establishes a Bluetooth wireless connection with the headset.

[0026] The Bluetooth audio connector of the disclosed embodiment includes a male terminal, a female terminal and a controller, wherein the male terminal is used to connect to a master device, the female terminal is used to connect to a power adapter, the power input pin of the controller is connected to the configuration channel CC2 pin of the male terminal through a pull-down resistor, and the audio signal pin is connected to the data signal pin of the male terminal. In the disclosed embodiment, the controller is continuously powered on by the Vconn power output by the CC2 pin, thereby greatly reducing the risk of power failure and restart during the process of plugging and unplugging the power adapter, thereby making the Bluetooth communication with the slave device more stable, and improving the stability and reliability of Bluetooth communication. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the specific embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 It is a schematic diagram of application scenarios of Bluetooth headsets in some embodiments of the present disclosure.

[0029] Figure 2 It is a schematic diagram of application scenarios of Bluetooth headsets in some embodiments of the present disclosure.

[0030] Figure 3 It is a schematic diagram of the hardware connection of a Bluetooth headset in some implementation modes of the present disclosure.

[0031] Figure 4 It is a circuit schematic diagram of a Dongle accessory in the related art.

[0032] Figure 5 is a circuit schematic diagram of a Bluetooth audio connector in some embodiments of the present disclosure.

[0033] Figure 6 is a circuit schematic diagram of a Bluetooth audio connector in some embodiments of the present disclosure.

[0034] Figure 7 is a circuit schematic diagram of a Bluetooth audio connector in some embodiments of the present disclosure.

[0035] Figure 8 is a circuit schematic diagram of a Bluetooth audio connector in some embodiments of the present disclosure.

[0036] Fig. 9is a circuit schematic diagram of a Bluetooth audio connector in some embodiments of the present disclosure.

[0037] Fig.10 is a circuit schematic diagram of a Bluetooth audio connector in some embodiments of the present disclosure.

[0038] Fig.11 It is a structural block diagram of a main device in some implementation modes of the present disclosure. DETAILED DESCRIPTION

[0039] The technical solution of the present disclosure will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described implementation is a part of the implementation of the present disclosure, rather than all the implementations. Based on the implementation in the present disclosure, all other implementations obtained by ordinary technicians in the field without creative work are within the scope of protection of the present disclosure. In addition, the technical features involved in the different implementations of the present disclosure described below can be combined with each other as long as they do not conflict with each other.

[0040] Bluetooth Dongle accessories can enable Bluetooth devices to establish Bluetooth connections with various electronic devices and realize Bluetooth audio transmission. Dongle accessories are generally USB (Universal Serial Bus) interfaces. By plugging the Dongle accessories into electronic devices, Bluetooth communication connections can be established between electronic devices and Bluetooth devices.

[0041] For example Figure 1 A typical application scenario of a Bluetooth Dongle accessory is shown. Some computers 1 do not support the Bluetooth function and therefore cannot directly establish a Bluetooth connection with the headset 2. By inserting the Bluetooth Dongle accessory 3 into the USB port of the computer 1, the Dongle accessory 3 can interact with the computer 1 for audio data and send the audio data to the headset 2 through the Bluetooth module, so that the computer 1 that was originally unable to establish a Bluetooth connection supports the Bluetooth function.

[0042] With the development of Bluetooth communication technology, Bluetooth Dongle accessories are no longer limited to expansion accessories for electronic devices that do not support Bluetooth functions. Nowadays, some audio equipment manufacturers will develop supporting Dongle accessories for audio equipment to achieve low-latency, high-quality Bluetooth audio transmission.

[0043] For example Figure 2 In the example scenario, the TWS headset 21 has a matching Dongle accessory 22, which can be plugged into the charging port of the mobile phone 10, so that the Dongle accessory 22 interacts with the mobile phone 10 for audio data, and then sends it to the TWS headset 21 through its own Bluetooth module.

[0044] Since the TWS headset 21 and the Dongle accessory 22 can be developed in conjunction, the two can develop a private protocol for Bluetooth communication, thereby achieving Bluetooth audio transmission with lower latency and higher sound quality. For example, the current latency of the mobile phone 10 and the TWS headset 21 directly connected via Bluetooth is 100ms to 200ms, and if the mobile phone 10 establishes a Bluetooth connection with the TWS headset 21 through the Dongle accessory 22, the latency can be reduced to 50ms, which greatly improves the user experience and makes the TWS headset suitable for gaming scenarios with extremely high latency requirements.

[0045] However, the current mainstream mobile terminal devices often have only one data interface compatible with data transmission and charging. Figure 2 In the example scenario, the mobile phone 10 cannot be charged because the Dongle accessory 22 occupies the data interface of the mobile phone 10. In order to realize that the mobile phone 10 is connected to the Dongle accessory 22 while charging, there is a Dongle accessory with a dual interface in the related art, so that the Dongle accessory 22 can be connected to a power adapter to power the mobile phone 10.

[0046] For example Figure 3 The hardware connection scenario of the dual-interface Dongle accessory is shown. The Dongle accessory has a male terminal and a female terminal. The male terminal is used to be pluggable and connected to the charging interface of the electronic device. When the electronic device needs to be charged, the power adapter can be plugged into the female terminal of the Dongle accessory, so that the electronic device can be charged through the Dongle accessory.

[0047] However, in this charging scenario, when the power adapter is unplugged, Bluetooth disconnection often occurs, resulting in interruption and freeze of audio transmission, affecting the user experience. The inventor of the present disclosure has found that this is because when the power adapter is unplugged, the power supply switching of the Dongle accessory easily causes the Dongle accessory to power off and restart, thereby causing the Dongle accessory to disconnect and reconnect with the Bluetooth device. For ease of understanding, the following is combined with Figure 4 The working principle of the Dongle accessory is explained.

[0048] For ease of understanding, Figure 4 In the example, the power line is represented by a solid line, and the signal line is represented by a dotted line. Figure 4In the description, SoC (System of Chip) refers to the main control chip of the Dongle accessory, which may include one or more processing cores for executing the control of other devices and interacting with the main device for audio data through the male terminal. The male terminal (UFP) is used to connect to the main device, and is pluggable with the female terminal on the main device. The main device may be, for example, the aforementioned mobile phone. The female terminal (DFP) is used to connect to the power adapter, and the male terminal on the power adapter is pluggable with the female terminal of the Dongle accessory. Pwr_Switch represents a switching switch, which is used to control the on and off of the charging circuit. DC / DC represents a power conversion circuit, which is used to transform and stabilize the input power supply. The pull-down resistor is used to pull down the level of the circuit.

[0049] exist Figure 4 In the example, the male and female terminals are Type-C type male and female terminals, that is, the male terminal is a Type-C plug, and the female terminal is a Type-C interface.

[0050] When only the Dongle accessory is inserted into the main device (such as a mobile phone), the pull-down resistor defaults to pull down the configuration channel CC1 / CC2 level. When the main device detects this pull-down level, it will actively output 5V voltage to DC / DC through the Vbus of the male terminal, and power the SoC after DC / DC voltage conversion, so that the Dongle accessory can work normally. The SoC interacts with the main device through the DM / DP channel for audio data, and then sends it to the slave device (such as headphones) using Bluetooth. During this process, Pwr_Switch remains disconnected.

[0051] When the Dongle accessory is inserted into the main device and the power adapter is inserted into the Dongle accessory, the adapter power is supplied to the DC / DC through the female terminal Vbus. At the same time, the SoC detects that the adapter is inserted and controls the pull-down resistor to be turned off. The main device detects that the CC1 / CC2 pull-down stops, and thus stops supplying power to the Dongle accessory. At this time, the DC / DC power is provided by the adapter. After the SoC detects that the power supply of the power adapter is stable, it controls Pwr_Switch to turn on, so that the power input from the power adapter can be supplied to the main device through Pwr_Switch to power the main device, generally for low-power charging, such as 5V / 1A or 5V / 2A.

[0052] However, when the power adapter is unplugged from the Dongle accessory, the DC / DC is instantly powered off, so the SoC is powered off, and the pull-down resistor restores the pull-down signal. After the host device detects the CC1 / CC2 pull-down signal, it outputs 5V voltage to the DC / DC through the Vbus of the male terminal again, and after the DC / DC voltage conversion, it powers the SoC. At this time, the SoC is powered on and resumes normal operation. It can be seen that when the power adapter is unplugged, the SoC is powered off and restarted due to the power supply switching, so that the Dongle accessory is interrupted or stuck, affecting the user experience.

[0053] Based on the defects of the above-mentioned related technologies, the embodiments of the present disclosure provide a Bluetooth audio connector and a Bluetooth headset, which aim to solve the power-off and restart problem when the Dongle accessory is switched to a power source, and improve the stability and effect of the Bluetooth connection.

[0054] In a first aspect, an embodiment of the present disclosure provides a Bluetooth audio connector, which may include the aforementioned Dongle accessory, which is a Bluetooth hardware used to be plugged into a master device to implement a Bluetooth communication connection between the master device and a slave device.

[0055] like Figure 5 As shown, in some embodiments, the Bluetooth audio connector of the example of the present disclosure includes a controller, a male terminal and a female terminal.

[0056] The controller refers to the main control circuit of the Bluetooth audio connector, which may include a processor and a memory. The processor may be of any type, having one or more processing cores, which may perform single-threaded or multi-threaded operations, and is used to parse instructions to perform operations such as acquiring data, performing logical operations, and issuing operation processing results. The memory may include a volatile or non-volatile readable storage medium, such as a flash memory device, and the memory has a program storage area for storing computer executable programs and modules for the processor to call to implement one or more corresponding functions below. For example, in some embodiments, the controller may be a system-on-chip SoC, which integrates multiple data processing and interaction capabilities.

[0057] In some embodiments, the controller may also be integrated with a Bluetooth module, for example, the controller may use a Bluetooth chip, thereby eliminating the need for an external Bluetooth radio frequency circuit. Of course, those skilled in the art will appreciate that in other embodiments, the controller may also include a non-integrated processing chip and a Bluetooth module, and the two are connected through a peripheral circuit. In either case, it is only necessary that the Bluetooth audio connector be able to establish a Bluetooth connection with the slave device through the Bluetooth module, and those skilled in the art will undoubtedly understand and fully implement this, and this disclosure will not go into details.

[0058] The male terminal and the female terminal are pluggable data plugs / interfaces, respectively. The male terminal is used for pluggable connection with the host device, and the female terminal is used for pluggable connection with the power adapter. In the embodiments of the present disclosure, the male terminal and the female terminal can be any interface type suitable for implementation, such as USB-A, Type-C, etc.

[0059] In the embodiments of the present disclosure, the master device and the slave device may also be any device suitable for establishing a Bluetooth connection. For example, the master device may be a mobile phone, a tablet computer, etc., and the slave device may be a TWS headset, a Bluetooth speaker, etc. The present disclosure does not impose any restrictions on this.

[0060] A power adapter refers to a charger used to connect to AC power, which generally includes an adapter plug and a data cable. The adapter plug is used to connect to the AC power, and the data cable is used to connect to the charging interface of the electronic device. In the embodiment of the present disclosure, the charging cable of the power adapter is used to connect to the female terminal of the Bluetooth audio connector.

[0061] For ease of understanding, in the following implementation manner of the present disclosure, a mobile phone will be used as the master device, a TWS headset will be used as the slave device, the Type-C type will be used as an example of the male and female terminals, and the male terminal will be a Type-C plug and the female terminal will be a Type-C interface.

[0062] Continue to refer to Figure 5 As shown, in the embodiment of the present disclosure, the power pin Vbus of the female terminal of the Bluetooth audio connector is connected to the power pin Vbus of the male terminal through the first power switching switch Pwr_Switch 1, that is, the first power switching switch Pwr_Switch 1 includes a first end, a second end and a control end, the first end is connected to the power pin Vbus of the female terminal, the second end is connected to the power pin Vbus of the male terminal, and the control end is connected to the controller. At the same time, the controller detects the power pin Vbus of the female terminal to detect whether the power adapter is inserted through the level change.

[0063] Different from Figure 4 In the traditional power supply scheme shown in the embodiment of the present disclosure, the power input pin Vin of the controller is connected to the configuration channel CC2 pin of the male terminal through a pull-down resistor.

[0064] It can be understood that the Type-C connector protocol includes two CC (Configuration Channel) pins, CC1 and CC2, which are mainly used for insertion detection and negotiation of DFP / UFP identity. In the normal mobile phone charging process, the charging cable is inserted into the mobile phone charging port, and the mobile phone detects that the CC2 pin level is pulled down, so it will output Vconn power to the data line through the CC2 pin, with a size of 5V / 0.3A. This Vconn power is mainly used to power the charging chip in the data line.

[0065] For the Dongle accessory, the Vconn power supply is sufficient to power on the controller. Figure 4 Example) does not use the power line Vbus to power the controller, but uses the Vconn power supply to power the controller.

[0066] Reference Figure 5 As shown in the figure, the controller's power input pin Vin is connected to the CC2 pin of the male terminal, and the pull-down resistor continuously pulls down the level of the CC2 pin. Therefore, when the male terminal is inserted into the mobile phone, the mobile phone detects that the CC2 pin is pulled down, and outputs the Vconn power through the CC2 pin. Inside the Bluetooth audio connector, the Vconn power input through the CC2 pin can be given to the controller's power input pin Vin, so that the controller is powered on and works.

[0067] After the controller is powered on, audio data can be interacted through the audio signal pin DM / DP and the data signal pin DM / DP on the male terminal to realize audio data interaction between the master device (such as a mobile phone) and the Bluetooth audio connector. Then the controller can send the audio data to the slave device (such as TWS headphones) through the Bluetooth module to realize Bluetooth communication.

[0068] When the Bluetooth audio connector is plugged into the mobile phone, the power adapter is plugged into the female terminal of the Bluetooth audio connector. At this time, the controller detects that the power adapter is plugged in, and can control the first power supply switching switch Pwr_Switch 1 to be turned on, so that the power Vbus provided by the power adapter is given to the mobile phone after passing through the first power supply switching switch Pwr_Switch 1, so that the mobile phone is charged normally.

[0069] Afterwards, when the power adapter is unplugged from the Bluetooth audio connector, the controller detects that the power adapter is unplugged, and controls the first power supply switch Pwr_Switch 1 to disconnect, thereby interrupting the charging of the mobile phone. During this process, since the controller continues to be supplied with Vconn power by the CC2 pin, that is, the controller is continuously powered by the mobile phone, the controller continues to be powered on during the process of plugging and unplugging the power adapter, which greatly reduces the risk of the controller powering off and restarting, making the entire Bluetooth communication process more stable.

[0070] From the above, it can be seen that in the embodiment of the present disclosure, since the controller is continuously powered by the Vconn power output by the CC2 pin, the risk of power failure and restart is greatly reduced during the process of plugging and unplugging the power adapter, thereby making the Bluetooth communication with the slave device more stable, thereby improving the stability and reliability of Bluetooth communication.

[0071] It is worth noting that although Figure 5 The implementation method greatly reduces the risk of Dongle accessories powering off and restarting, but actual tests have verified that there is still a certain risk of powering off and restarting. Further research has found that this is because when the power adapter is inserted, the internal power supply of the Dongle accessory fluctuates greatly, which easily causes the Vconn power supply input to the CC2 pin to fluctuate, resulting in a short power outage and restart of the controller.

[0072] In order to further optimize the power supply for the Dongle accessory, in some embodiments of the present disclosure, when the power adapter is inserted, the Vbus power supply and the Vconn power supply provided by the power adapter are used to power the controller at the same time. Figure 6 Provide explanation.

[0073] like Figure 6 As shown, in the example of the present disclosure, in addition to the above circuit part, the Bluetooth audio connector also includes a first power conversion module DC / DC 1, the input end of the first power conversion module DC / DC 1 is connected to the power pin Vbus of the female terminal, and the output end is connected to the power input pin Vin of the controller. DC / DC is a direct current / direct current converter, which is mainly used for voltage conversion and voltage stabilization. In the embodiment of the present disclosure, the first power conversion module is not limited to the DC / DC circuit, but can also be any other voltage conversion circuit suitable for implementation, and the present disclosure does not limit this.

[0074] exist Figure 6 In the example, when only the Bluetooth audio connector is plugged into the mobile phone, the working principle is the same as described above, and the CC2 pin provides Vconn power to power the controller, which will not be repeated here.

[0075] When the power adapter is inserted into the Bluetooth audio connector, the power pin Vbus of the female terminal provides power to the first power conversion module DC / DC 1. After the first power conversion module DC / DC 1 steps down and stabilizes the voltage, the power is supplied to the power input pin Vin of the controller to power the controller. The rest of the principles are the same as above and will not be repeated here.

[0076] It can be seen that when the power adapter is plugged in, the Vbus power provided by the power adapter and the Vconn power provided by the mobile phone jointly power the controller Vin, thereby reducing or eliminating the risk of Vconn power supply voltage reduction failure due to power fluctuations caused by adapter insertion.

[0077] From the above, it can be seen that in the embodiment of the present disclosure, when the power adapter is inserted into the Bluetooth audio connector, the Vbus power provided by the power adapter and the Vconn power provided by the mobile phone are used to jointly power the controller Vin, thereby reducing or eliminating the risk of Vconn power supply voltage reduction failure caused by power fluctuations caused by the insertion of the adapter, and further improving the stability and reliability of Bluetooth communication.

[0078] In addition, it is worth noting that in the above implementation, although the Bluetooth audio adapter can provide a female socket terminal for charging the main device, due to the presence of the Bluetooth audio adapter, the power adapter and the main device cannot interact with the fast charging protocol, and thus can only achieve basic power charging, generally 5V / 1A or 5V / 2A basic charging mode, and the charging speed of the main device is slow.

[0079] Therefore, in order to further realize fast charging between the power adapter and the main device, in some embodiments of the present disclosure, the power supply circuit of the Dongle accessory is further optimized so that the power adapter and the main device establish a fast charging protocol interaction to realize fast charging. Figure 7 Provide explanation.

[0080] like Figure 7 As shown in the aforementioned Figure 5 Based on the circuit of the example, in the example of the present disclosure, the Bluetooth audio connector further includes a protocol conversion circuit, and the protocol conversion circuit includes a power supply terminal, a protocol receiving terminal BC / QC and a protocol sending terminal CC1.

[0081] The power supply end is connected to the power pin Vbus of the female terminal, so that when the power adapter is inserted, the power adapter supplies power to the protocol conversion circuit through the power pin Vbus. The protocol receiving end is connected to the female terminal to receive the protocol information sent by the power adapter through the female terminal. The protocol sending end CC1 is connected to the configuration channel CC1 of the male terminal to convert the received protocol information into the target protocol and then send it to the main device end.

[0082] It should be noted that today's fast charging protocols mainly include QC protocol, PD protocol and BC protocol, among which QC protocol and BC protocol need to exchange protocol information through the DM / DP pins of the Type-C connector. In the disclosed embodiment, the DM / DP pins on the male terminal have been occupied for audio data interaction, so it is impossible to directly implement the interaction between the QC protocol and the BC protocol, and it is impossible to establish a fast charge that complies with both protocols.

[0083] Therefore, in the embodiment of the present disclosure, a protocol conversion circuit is newly provided in the Dongle accessory to convert and forward the protocol information, thereby realizing the fast charging protocol interaction between the power adapter and the main device and establishing a fast charging connection.

[0084] See also Figure 7 As shown, when the Dongle accessory is inserted into the mobile phone and the power adapter is inserted into the Dongle accessory, the protocol conversion circuit is powered and started by the power adapter through the power pin Vbus of the female terminal. It is worth noting that in the embodiment of the present disclosure, the power supply switch is controlled by the protocol conversion circuit.

[0085] That is, Figure 8 The second power supply switching switch Pwr_Switch 2 shown includes a third end, a fourth end and a second control end, the third end is connected to the power pin Vbus of the female terminal, the fourth end is connected to the power pin Vbus of the male terminal, and the second control end is connected to the protocol conversion circuit. After the power adapter is inserted to power on the protocol conversion circuit, the protocol conversion circuit can control the second power supply switching switch Pwr_Switch 2 to turn on, so that the power adapter supplies power to the main device and realizes charging of the main device in the basic power mode. When the power adapter is unplugged, the protocol conversion circuit is powered off, so that the second power supply switching switch Pwr_Switch 2 is disconnected, and the power supply of the main device is disconnected. The power supply principle of the rest of the parts is the same as the aforementioned Figure 5 The implementation methods are basically the same and will not be described here in detail. Only the establishment of fast charging will be explained below.

[0086] The protocol conversion circuit receives the protocol information given by the power adapter through the female terminal. The protocol information may be QC protocol, PD protocol or BC protocol. The protocol conversion circuit converts the protocol information into PD protocol information, and then sends it to the configuration channel CC1 of the male terminal through the protocol sending end, so that the main device and the power adapter establish PD fast charging.

[0087] It can be understood that since the Dongle accessory occupies the DM / DP pins for audio data interaction, it is impossible to directly realize the interaction between the QC protocol and the BC protocol. Therefore, in the embodiment of the present disclosure, the protocol conversion circuit is used to convert the QC protocol information and the BC protocol information into charging protocol information, and convert it into PD protocol information, so that the power adapter and the main device can establish a PD fast charging connection. Theoretically, the Bluetooth audio connector of the embodiment of the present disclosure can provide a fast charging power of more than 100W between the power adapter and the main device, greatly improving the charging speed and efficiency of the main device.

[0088] In addition, the above Figure 7 In the implementation mode, considering that during the fast charging process between the power adapter and the main device, the power provided by the power adapter will be greatly increased, so the power supply for the protocol conversion circuit will also be increased. In order to protect the protocol conversion circuit, a second power conversion module can be provided between the protocol conversion circuit and the female terminal. Figure 8 The implementation method is described.

[0089] like Figure 8 As shown, the Bluetooth audio connector also includes a second power conversion module DC / DC 2, the input end of the second power conversion module is connected to the power pin Vbus of the female terminal, and the output end is connected to the power end of the protocol conversion circuit. DC / DC is a direct current / direct current converter, which is mainly used for voltage conversion and voltage stabilization. In the embodiments of the present disclosure, the second power conversion module is not limited to the DC / DC circuit, but can also be any other voltage conversion circuit suitable for implementation, and the present disclosure does not limit this.

[0090] From the above, it can be seen that in the embodiment of the present disclosure, a protocol conversion circuit is used to establish a fast charging connection between the power adapter and the main device, and the power supply of the protocol conversion circuit is transformed and stabilized by the second power conversion module to maintain the power supply of the protocol conversion circuit stable and avoid the power supply of the power adapter increasing and damaging the protocol conversion circuit.

[0091] It is worth mentioning that Figure 7 and Figure 8 The Bluetooth audio connectors shown are based on Figure 5 Improvements in the implementation method. In fact, the above-mentioned solution of establishing a fast charging connection using a protocol conversion chip can also be set in Figure 6 In the implementation mode, the circuit structure is as follows: Fig. 9 and Fig.10 shown.

[0092] for Fig. 9 and Fig.10 The circuit structure shown in FIG. 1 has been described in detail in the previous embodiments. To avoid redundancy, the following is a circuit structure shown in FIG. Fig.10Taking the circuit structure as an example, the complete working principle of the Bluetooth audio connector according to the embodiment of the present disclosure is explained.

[0093] like Fig.10 As shown, when the Bluetooth audio connector is not plugged into the host device and is not connected to the power adapter, the protocol conversion circuit and the controller lose power, and the second power supply switch Pwr_Switch 2 is in the disconnected state.

[0094] When the Bluetooth audio connector is only inserted into the master device, the protocol conversion circuit is still in a power-off state due to no power supply, and the second power supply switch Pwr_Switch 2 is in a disconnected state. Since the pull-down resistor pulls down the CC2 pin, after the master device detects the pull-down of the CC2 pin, it inputs 5V / 0.3A Vconn power to the controller's power input pin Vin through the CC2 pin, so that the controller is powered on and starts working. During the operation, the controller interacts with the master device through the audio signal pins DM / DP for audio data, and uses the Bluetooth module to send the audio data to the slave device, realizing the Bluetooth connection between the master device and the slave device.

[0095] Then, when the power adapter is inserted into the Bluetooth audio connector, at this time, the power input from the power adapter through the power pin Vbus of the female terminal is given to the first power conversion module DC / DC 1, and then the Vconn input from the first power conversion module DC / DC1 and CC2 pins jointly power the controller, thereby reducing or eliminating the risk of Vconn power supply voltage reduction failure due to power fluctuations caused by adapter insertion, and avoiding power failure and restart of the controller. At the same time, the power adapter input power is given to the second power conversion module DC / DC 2 by another route, and then the protocol conversion circuit is powered on and started. The protocol conversion circuit controls the second power supply switching switch Pwr_Switch 2 to turn on, so that the power adapter powers the main device. Afterwards, the controller controls the protocol conversion circuit to realize fast charging protocol conversion and interaction between the power adapter and the main device, establish PD fast charging between the power adapter and the main device, and improve the charging speed and efficiency of the main device.

[0096] Afterwards, when the power adapter is unplugged from the Bluetooth audio connector, the protocol conversion circuit is powered off, the second power supply switch Pwr_Switch 2 is disconnected, and the main device stops charging. However, the Vconn power input by the main device through the CC2 pin is always present, so the controller will not be powered off and restarted.

[0097] From the above, it can be seen that in the embodiment of the present disclosure, since the controller is continuously powered on by the Vconn power output by the CC2 pin, the risk of power failure and restart is greatly reduced during the process of plugging and unplugging the power adapter, thereby making the Bluetooth communication with the slave device more stable, and improving the stability and reliability of Bluetooth communication. In addition, the protocol conversion circuit is used to realize the fast charging protocol conversion and interaction between the power adapter and the main device, establish a fast charging connection between the power adapter and the main device, and improve the charging speed and efficiency of the main device.

[0098] In a second aspect, an embodiment of the present disclosure provides a Bluetooth headset, which includes an earphone and a Bluetooth audio connector of any of the aforementioned embodiments.

[0099] For example Figure 2 In the example scenario, the Bluetooth headset includes a TWS headset 21 and a Dongle accessory 22. The Dongle accessory 22 is a Bluetooth audio connector of an embodiment of the present disclosure. Using the Bluetooth headset of the embodiment of the present disclosure, a low-latency, high-quality Bluetooth connection can be established between the TWS headset and any electronic device.

[0100] Those skilled in the art will appreciate that the earphones described in the present disclosure are not limited to Figure 2 The exemplary TWS earphones may also be head-mounted earphones, neck-ring earphones, etc., which are not limited in the present disclosure. In addition, for the working principle of the earphones and the Bluetooth audio connector, those skilled in the art may refer to the above embodiments, which will not be described in detail.

[0101] Fig.11 The structure block diagram of the main device in some embodiments is shown. Fig.11 In the example, the main device is an electronic device, which may be a smart phone, for example. Fig.11 The structure of the electronic device will be described.

[0102] Reference Fig.11 , the electronic device 1800 may include one or more of the following components: a processing component 1802 , a memory 1804 , a power component 1806 , a multimedia component 1808 , an audio component 1810 , an input / output (I / O) interface 1812 , a sensor component 1816 , and a communication component 1818 .

[0103] The processing component 1802 generally controls the overall operation of the electronic device 1800, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 1802 may include one or more processors 1820 to execute instructions. In addition, the processing component 1802 may include one or more modules to facilitate interaction between the processing component 1802 and other components. For example, the processing component 1802 may include a multimedia module to facilitate interaction between the multimedia component 1808 and the processing component 1802. For another example, the processing component 1802 may read executable instructions from a memory to implement electronic device related functions.

[0104] The memory 1804 is configured to store various types of data to support operations on the electronic device 1800. Examples of such data include instructions for any application or method operating on the electronic device 1800, contact data, phone book data, messages, pictures, videos, etc. The memory 1804 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0105] The power supply component 1806 provides power to the various components of the electronic device 1800. The power supply component 1806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to the electronic device 1800.

[0106] The multimedia component 1808 includes a display screen that provides an output interface between the electronic device 1800 and the user. In some embodiments, the multimedia component 1808 includes a front camera and / or a rear camera. When the electronic device 1800 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera can receive external multimedia data. Each front camera and rear camera can be a fixed optical lens system or have a focal length and optical zoom capability.

[0107] The audio component 1810 is configured to output and / or input audio signals. For example, the audio component 1810 includes a microphone (MIC), and when the electronic device 1800 is in an operation mode, such as a call mode, a recording mode, and a voice recognition mode, the microphone is configured to receive an external audio signal. The received audio signal can be further stored in the memory 1804 or sent via the communication component 1818. In some embodiments, the audio component 1810 also includes a speaker for outputting audio signals.

[0108] I / O interface 1812 provides an interface between processing component 1802 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include but are not limited to: home button, volume button, start button, and lock button.

[0109] The sensor assembly 1816 includes one or more sensors for providing various aspects of status assessment for the electronic device 1800. For example, the sensor assembly 1816 can detect the open / closed state of the electronic device 1800, the relative positioning of components, such as the display and keypad of the electronic device 1800, and the sensor assembly 1816 can also detect the position change of the electronic device 1800 or a component of the electronic device 1800, the presence or absence of user contact with the electronic device 1800, the orientation or acceleration / deceleration of the electronic device 1800, and the temperature change of the electronic device 1800. The sensor assembly 1816 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 1816 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 1816 may also include an accelerometer, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0110] The communication component 1818 is configured to facilitate wired or wireless communication between the electronic device 1800 and other devices. The electronic device 1800 can access a wireless network based on a communication standard, such as Wi-Fi, 2G, 3G, 4G, 5G or 6G, or a combination thereof. In an exemplary embodiment, the communication component 1818 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 1818 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0111] In an exemplary embodiment, the electronic device 1800 may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components.

[0112] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the embodiments. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. A Bluetooth audio connector, characterized in that: include: A male terminal and a female terminal, the male terminal is used to connect to a main device, and the female terminal is used to connect to a power adapter; as well as The controller includes a power input pin and an audio signal pin, wherein the power input pin is connected to the configuration channel CC2 pin of the male terminal through a pull-down resistor, and the pull-down resistor is used to pull down the level of the CC2 pin; the audio signal pin is connected to the data signal pin of the male terminal, and the controller is used to send the audio data received through the audio signal pin to the slave device via Bluetooth.

2. The Bluetooth audio connector according to claim 1, characterized in that: Also includes: The first power conversion module has an input end connected to the power pin of the female socket terminal and an output end connected to the power input pin of the controller.

3. The Bluetooth audio connector according to claim 1 or 2, characterized in that: Also includes: A first power supply switch, comprising a first end, a second end and a first control end, wherein the first end is connected to a power pin of the female terminal, the second end is connected to a power pin of the male terminal, and the first control end is connected to the controller; The controller is configured to control the first end and the second end of the first power supply switch to be conductive when it is detected that the power adapter is supplying power.

4. The Bluetooth audio connector according to claim 1 or 2, characterized in that: Also includes: A protocol conversion circuit comprises a power supply end, a protocol receiving end and a protocol sending end, wherein the power supply end is connected to the power pin of the female terminal, the protocol receiving end is connected to the female terminal, and the protocol sending end is connected to the male terminal. The protocol conversion circuit is used to forward the charging protocol information between the main device and the power adapter.

5. The Bluetooth audio connector according to claim 4, characterized in that: The protocol sending end is connected to the configuration channel CC1 pin of the male terminal, and the protocol conversion circuit is configured to convert the charging protocol information of the power adapter into PD protocol information and send it to the main device through the protocol sending end.

6. The Bluetooth audio connector according to claim 4, characterized in that: Also includes: A second power supply switching switch comprises a third end, a fourth end and a second control end, the third end is connected to the power pin of the female socket terminal, the fourth end is connected to the power pin of the male socket terminal, and the second control end is connected to the protocol conversion circuit; The protocol conversion circuit is configured to control the third terminal and the fourth terminal of the second power supply switch to be conductive when it is detected that the power adapter is supplying power.

7. The Bluetooth audio connector according to claim 4, characterized in that: Also includes: The second power conversion module has an input end connected to the power pin of the female socket terminal and an output end connected to the power end of the protocol conversion circuit.

8. The Bluetooth audio connector according to claim 1, characterized in that: The controller is a Bluetooth chip; or, The controller includes a processing chip and a Bluetooth module, and the controller is configured to send the received audio data to the slave device through the Bluetooth module.

9. The Bluetooth audio connector according to claim 1, characterized in that: The master device includes a mobile phone, the slave device includes a TWS headset, and the male terminal and the female terminal are Type-C terminals.

10. A Bluetooth headset, characterized in that: include: earphone; as well as According to any one of claims 1 to 9, the Bluetooth audio connector establishes a Bluetooth wireless connection with the headset.

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