CN110994718B - Wireless earphone, charging box and wireless earphone charging system - Google Patents
Wireless earphone, charging box and wireless earphone charging system Download PDFInfo
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- CN110994718B CN110994718B CN201911198545.7A CN201911198545A CN110994718B CN 110994718 B CN110994718 B CN 110994718B CN 201911198545 A CN201911198545 A CN 201911198545A CN 110994718 B CN110994718 B CN 110994718B
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
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- H04B5/48—
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- H04B5/79—
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1025—Accumulators or arrangements for charging
Abstract
The invention discloses a wireless earphone, a charging box and a wireless earphone charging system, wherein the wireless earphone comprises: the power input carrier circuit is configured to output a charging box power supply connected with the second input end to the battery assembly when the second input end and the second output end are connected with the charging box; the power input carrier circuit is further configured to transmit the earphone communication signal loaded by the first input end to the charging box; and/or downloading the charging box communication signal received by the second input end to the earphone control circuit so as to realize the communication connection between the earphone control circuit and the charging box. According to the invention, the TX signal or the RX signal can be carried on the direct-current power supply, so that full-duplex communication is realized, and the communication efficiency between the earphone and the charging box is facilitated.
Description
Technical Field
The invention relates to the technical field of wireless earphone charging, in particular to a wireless earphone, a charging box and a wireless earphone charging system.
Background
With the development of wireless communication technology, the trend of intellectualization and wireless technology has been deeply reflected in wireless earphone products such as bluetooth earphone. Wireless headset products are typically fitted with a charging box having a receiving and charging function, the charging box having the function of charging the headset and sending pairing commands.
In order to reduce the use of earphone contact points, based on the communication design of the wireless earphone and the charging box, 3pin communication is designed, three pin needles are needed for the 3pin communication, namely a power supply end, a signal end and a grounding end, which are separated, and half-duplex communication is adopted, namely RX signals can not be transmitted when TX signals are transmitted; when the RX transmits a signal, the TX signal cannot transmit. This causes a reduction in the timeliness of the transmission of the signals, resulting in a delay in the communication between the earphone and the charging box, and a reduction in the communication efficiency between the earphone and the charging box.
Disclosure of Invention
The invention mainly aims to provide a wireless earphone, a charging box and a wireless earphone charging system, which aim to improve the communication efficiency between the earphone and the charging box.
To achieve the above object, the present invention proposes a wireless earphone including:
a battery assembly;
an earphone control circuit;
the power input carrier circuit is configured to output a charging box power supply connected with the second input end to the battery assembly when the earphone is connected with the charging box;
the power input carrier circuit is further configured to transmit the loaded earphone communication signal to the charging box; and/or downloading the received charging box communication signal to the earphone control circuit so as to realize the communication connection between the earphone control circuit and the charging box.
Optionally, the power input carrier circuit is provided with a power output end, a first input end, a first output end, a second input end and a second output end, the power output end is connected with the battery assembly, and the first output end and the first input end are respectively connected with the earphone control circuit; the second input end and the second output end are electrically connected with the charging box.
Optionally, the power input carrier circuit includes a bias circuit and an earphone transformer, and the earphone transformer includes a first primary winding, a second primary winding, a first secondary winding and a second secondary winding;
the first end of the first primary coil is a first output end of the power input carrier circuit, the first end of the second primary coil is a first output end of the power input carrier circuit, and the second end of the first primary coil and the second end of the second primary coil are respectively connected with the bias circuit; the first end of the first secondary coil is a second input end of the power input carrier circuit, and the first end of the second secondary coil is a second output end of the power input carrier circuit; the second end of the first secondary coil is a power input end of the power input carrier circuit and is connected with the second end of the second secondary coil.
Optionally, the bias circuit includes a first resistor and a second resistor, a first end of the first resistor is connected with a first direct current power supply, and a second end of the first resistor is interconnected with a first end of the second resistor and a second end of the primary winding of the transformer; the second end of the second resistor is grounded.
Optionally, the earphone control circuit includes a first bidirectional switch, a first earphone control chip and a second earphone control chip, a first transmission end of the first bidirectional switch is connected with the first earphone control chip, and a second transmission end of the first bidirectional switch is connected with the second earphone control chip; the third transmission end of the first bidirectional switch is connected with the first input end of the power input carrier circuit, and the fourth transmission end of the first bidirectional switch is connected with the second output end of the power input carrier circuit.
Optionally, the earphone control circuit further includes a charging management chip, a signal transmission end of the charging management chip is connected with the first earphone control chip, and an output end of the charging management chip is connected with the battery assembly.
The invention also provides a charging box matched with the wireless earphone, which is characterized in that the charging box comprises:
A power supply;
a charging box control circuit;
the power supply output carrier circuit is configured to output the power supply to the wireless earphone through the first output end when the wireless earphone is connected to the second input end and the second output end;
the power output carrier circuit is further configured to transmit the coupled and accessed charging box communication signal to the wireless earphone, and/or couple the received wireless earphone communication signal to the charging box control circuit so as to realize the communication connection between the charging box control circuit and the wireless earphone.
Optionally, the power output carrier circuit is provided with a power input end, a first output end, a second input end and a second output end, wherein the power input end is connected with the power supply, and the first output end and the first input end are respectively coupled and connected with the charging box control circuit; the second input end and the second output end are electrically connected with the wireless earphone.
Optionally, the power output carrier circuit includes a coupling circuit and a charging box transformer, and the earphone transformer includes a first primary winding, a second primary winding, a first secondary winding and a second secondary winding;
the first end of the coupling circuit is a first input end of the power output carrier circuit, the second end of the coupling circuit is a second output end of the power output carrier circuit, the third end of the coupling circuit is connected with the first primary coil, and the fourth end of the coupling circuit is connected with the second primary coil;
The first end of the first secondary coil is a first output end of the power output carrier circuit, the first end of the second secondary coil is a second input end of the power output carrier circuit, and the second end of the first secondary coil is a power input end of the power output carrier circuit and is connected with the second end of the second secondary coil.
Optionally, the coupling circuit includes a first coupling capacitor and a second coupling capacitor, where a first end of the first coupling capacitor is a first end of the coupling circuit, and a second end of the second coupling capacitor is connected to a first end of the first primary coil;
the first end of the second coupling capacitor is a second end of the coupling circuit, and the second end of the second coupling capacitor is connected with the first end of the second primary coil.
Optionally, the charging box control circuit includes a second bidirectional switch, a first charging box control chip and a second charging box control chip, a first transmission end of the second bidirectional switch is connected with the first charging box control chip, and a second transmission end of the second bidirectional switch is connected with the second charging box control chip; the third transmission end of the second bidirectional switch is connected with the first input end of the power output carrier circuit, and the fourth transmission end of the second bidirectional switch is connected with the second output end of the power output carrier circuit.
Optionally, the charging box control circuit further includes a charging management chip, a signal transmission end of the charging management chip is connected with the first charging box control chip, and an output end of the charging management chip is connected with the power supply.
The invention also provides a wireless earphone charging system, which comprises:
a wireless headset as described above; and/or a charging cartridge as described above.
According to the wireless earphone, the battery assembly, the earphone control circuit and the power input carrier circuit are arranged, and when the wireless earphone is placed in the charging box, the charging box power supply connected to the second input end is output to the battery assembly through the power input carrier circuit; transmitting the earphone communication signal loaded by the first input end to a charging box; and/or downloading the charging box communication signal received by the second input end to the earphone control circuit so as to realize the communication connection between the earphone control circuit and the charging box. The invention realizes the communication connection between the wireless earphone and the charging box when the charging box charges the wireless earphone. The invention can transmit the TX and RX control signals at the same time when transmitting the voltage, and the TX signal or RX signal is carried to the direct current power supply, thereby realizing full duplex, improving the communication efficiency, reducing the time delay, ensuring the timeliness of signal transmission and having simple circuit design.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic circuit diagram of an embodiment of a wireless headset and a charging box of the present invention applied to a wireless headset charging system;
fig. 2 is a schematic circuit diagram of an embodiment of the wireless headset in fig. 1;
fig. 3 is a schematic circuit diagram of an embodiment of the charging box in fig. 1.
Reference numerals illustrate:
the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
The invention provides a wireless earphone and an earphone charging box matched with the wireless earphone for use, and the wireless earphone is hereinafter called as a charging box for short.
With the rapid development of earphone technology, wireless earphones, particularly bluetooth earphones, are increasingly widely applied, and the newly-appearing TWS (True Wireless Stereo ) earphone is a product which is more typical in wireless earphones and has a good combination of intelligentization and wireless trend, the TWS earphone has a certain occupancy rate in the earphone market by virtue of wearing free feeling and good sound quality, the wireless earphone is also increasingly frequently used in various occasions, and the single use time is also increasingly longer. In the actual use process, people often establish a communication link between the wireless earphone and the intelligent electronic device, such as a mobile phone, a smart watch and the like, play voice by using the wireless earphone, such as talking or playing a music lamp, collect voice of a user, and output the voice to the intelligent electronic device through a wireless communication module configured in the wireless earphone. TWS earphone is small and convenient, but has stronger battery capacity than traditional string neck type and head type Bluetooth earphone, and Bluetooth transmission between two ears is avoided not becoming a power consumption point. Wireless headsets are often internally self-powered, such as batteries, but are typically limited in their self-powered capacity, and therefore typically require a headset charging device to charge the wireless headset. The earphone charging device is mostly arranged in a charging box shape, and the wireless earphone can be stored in the charging box when not in use so as not to be lost. The charging box can communicate with the earphone, and the functions of forced pairing, box opening and closing action, OTA upgrading and the like of the TWS earphone are realized.
Currently, when a charging device is used to charge a wireless headset, most wireless headsets and charging boxes start to charge after the headset is placed on the charging device. However, in this placement process, there is a problem that the connection between the earphone and the charging box is unstable, or vibration is generated, and these may cause contact failure at the moment of contact. Therefore, the charging and communication of the earphone are controlled by the control box, however, the charging and communication of the traditional earphone usually adopts USB communication or UART communication, and the charging and communication functions of the earphone can be realized only by 4 wires (namely, VCC, D+, D-and GND wires) when the traditional earphone adopts USB communication. The in-ear wireless earphone has very small structural space, so that a USB (universal serial bus) or 4 contact points, namely VCC, TX, RX and GND (GND) are arranged in the in-ear wireless earphone with very small structural space, and the design difficulty of the earphone is increased.
In order to reduce the use of earphone contact points, based on the communication design of the wireless earphone and the charging box, 3pin communication is designed, three pin needles are needed for the 3pin communication, namely a power supply end, a signal end and a grounding end, which are separated, and half-duplex communication is adopted, namely RX signals can not be transmitted when TX signals are transmitted; when the RX transmits a signal, the TX signal cannot transmit. This reduces the timeliness of the signal transmission, which results in delays in communication between the headset and the charging cartridge, and reduces the efficiency of communication between the headset and the charging cartridge.
Referring to fig. 1, in an embodiment of the present invention, the wireless headset 100 includes:
a battery assembly 110;
an earphone control circuit 120;
a power input carrier circuit 130 configured to output the power supply 210 of the charging box 200 to which the second input terminal EI2 is connected to the battery assembly 110 when the earphone is connected to the charging box 200;
the power input carrier circuit 130 is further configured to transmit the earphone communication signal loaded by the first input end EI1 to the charging box 200; and/or, downloading the communication signal of the charging box 200 received by the second input end EI2 to the earphone control circuit 120, so as to realize the communication connection between the earphone control circuit 120 and the charging box 200.
In this embodiment, the wireless earphone 100 may be a wireless earphone 100 such as a bluetooth earphone, a TWS earphone (True Wireless Stereo, a real wireless earphone 100), or an infrared earphone. The battery assembly 110 in the wireless headset 100 is used to power an electrical load in the headset, which may be a speaker, microphone, indicator light, micro-motor, etc. The battery assembly 110 includes a battery for storing electric power, and a power conversion chip for converting the power supply 210 outputted from the charging cartridge 200 into the battery storing electric power. The input end of the power conversion chip is connected with the electric connector, and the output end of the power conversion chip is connected with the battery. The range of the stored electric energy of the battery can be set to 3.5-4.3V, and the battery can be realized by adopting rechargeable batteries such as dry batteries, lithium ion storage batteries or nickel-hydrogen batteries.
The earphone control circuit 120 may implement communication control and charging control of the wireless earphone 100, and implement communication connection with the charging box 200 through the power input carrier circuit 130.
The power input carrier circuit 130 has a power output end VDD1, a first input end EI1, a first output end EO1, a second input end EI2, and a second output end EO2, wherein the power output end VDD1 is connected to the battery assembly 110, and the first output end EO1 and the first input end EI1 are respectively connected to the earphone control circuit 120; the second input terminal EI2 and the second output terminal EO2 are electrically connected to the charging box 200.
In some embodiments, the electrical connector is optionally implemented by a pogo pin connector, and the electrical connector is provided with a conductive terminal connected to the second input end EI2, the second output end EO2, and the ground end of the power input carrier circuit 130, and the conductive terminal of the electrical connector is connected to the power end and the communication end of the charging box 200, so as to access the power supply 210 output by the charging box 200 for charging, and simultaneously implement a communication connection with the charging box 200. It can be understood that when the earphone is placed in the charging box 200, the battery assembly 110 of the wireless earphone 100 stores different amounts of electricity, in this embodiment, after information interaction such as the amount of electricity and the working state can be implemented between the wireless earphone 100 and the charging box 200, the charging box 200 supplies power to the wireless earphone 100, that is, the charging box 200 performs handshake communication with the wireless earphone 100, and after waiting for handshake, it can be determined that the earphone is in good contact with the charging box 200 at this time, and at this time, the charging box 200 can be triggered to charge the battery assembly 110 of the wireless earphone 100. The invention realizes the communication connection between the wireless earphone 100 and the charging box 200 when the charging box 200 charges the wireless earphone 100. It is also possible that the charging box 200 starts charging the wireless headset 100 once the headset is put into the charging box 200. The charging box 200 and the earphone can be compatible with each other in the above-mentioned priority selection scheme of charging and communication, that is, charging and communication can be simultaneously realized, so that the problem that charging and communication can only be selected and communication can not be realized while charging can be solved.
The connector can be arranged at the tail part of the earphone shell, and the electric connector can also be realized by adopting a metal probe, a metal spring plate and the like and is positioned at the tail part of the earphone shell in practical application. The second input end EI2 of the power input carrier circuit 130 may receive the power supply 210 output by the charging box 200, or may receive the communication signal sent by the charging box 200, and the second output end EO2 may send the communication signal of the earphone side. By the arrangement, the earphone and the charging box 200 can send and receive communication signals to the opposite side at the same time under the condition of charging, so that the transmission speed of the communication signals is improved, and the communication efficiency of the earphone and the charging box is improved.
It will be appreciated that the power supply 210 provided by the charging box 200 to the wireless headset 100 is dc power, and the signal for communication between the charging box 200 and the wireless headset 100 is typically an alternating signal, i.e. ac power. In this embodiment, the earphone control circuit 120 is coupled to the power input carrier circuit 130, and the communication signal of the earphone control circuit 120 can be carried to the dc signal of the power supply 210, so that the transmission of the communication signal is realized through the power line of the wireless earphone 100, and the earphone control circuit 120 can also receive the communication signal of the charging box 200 sent by the charging box 200 through coupled connection to the power input carrier circuit 130, and meanwhile avoid the output of the power voltage signal to the earphone control circuit 120.
The wireless earphone 100 of the invention is provided with the battery assembly 110, the earphone control circuit 120 and the power input carrier circuit 130, and when the wireless earphone 100 is placed in the charging box 200, the charging box 200 connected with the second input end EI2 is supplied with power 210 by the power input carrier circuit 130 and is output to the battery assembly 110; transmitting the earphone communication signal loaded by the first input terminal EI1 to the charging box 200; and/or, downloading the communication signal of the charging box 200 received by the second input end EI2 to the earphone control circuit 120, so as to realize the communication connection between the earphone control circuit 120 and the charging box 200. The invention realizes the communication connection between the wireless earphone 100 and the charging box 200 when the charging box 200 charges the wireless earphone 100. The invention can transmit the TX and RX control signals at the same time when transmitting the voltage, and the TX signal or RX signal is carried to the direct current power supply, thereby realizing full duplex, improving the communication efficiency, reducing the time delay, ensuring the timeliness of signal transmission and having simple circuit design.
Referring to fig. 1 and 2, in an embodiment, the power input carrier circuit 130 includes a bias circuit 131 and a headset transformer 132, the headset transformer 132 includes a first primary winding, a second primary winding, a first secondary winding, and a second secondary winding;
The first end of the first primary coil is a first output end EO1 of the power input carrier circuit 130, the first end of the second primary coil is a first output end of the power input carrier circuit 130, and the second end of the first primary coil and the second end of the second primary coil are respectively connected with the bias circuit 131; the first end of the first secondary winding is the second input end EI2 of the power input carrier circuit 130, and the first end of the second secondary winding is the second output end EO2 of the power input carrier circuit 130; the second end of the first secondary winding is a power input end of the power input carrier circuit 130, and is connected to the second end of the second secondary winding.
In this embodiment, since the power supply 210 output by the charging box 200 is usually dc voltage, and the communication signal is ac voltage, and the transformer coil plays a role of passing dc and blocking ac, the power supply 210 is already led out at the left side (the first secondary winding and the second secondary winding) of the earphone end, and does not pass through the right side (the first primary winding and the second primary winding) of the earphone transformer 132, and therefore, the bias circuit 131 is used to provide dc bias for the ac communication signal, so as to implement loading/downloading of the communication signal, so that the earphone control circuit 120 can load the communication signal into the transformer, or download the communication signal of the charging box 200 output by the charging box 200 from the transformer. The transformer is used for coupling in/out communication signals and the power supply 210 of the charging box 200. It can be understood that the input/output of the communication signal is realized through the transformer, and the problem of mismatching of the voltage of the communication signal between the charging box 200 and the wireless earphone 100 can be solved, so that the voltage adaptation of the communication signal between the charging box 200 and the wireless earphone 100 is realized.
Referring to fig. 1 and 2, in an embodiment, the bias circuit 131 includes a first resistor R1 and a second resistor R2, a first end of the first resistor R1 is connected to a first direct current power supply, and a second end of the first resistor R1 is interconnected with a first end of the second resistor R2 and a second end of the primary winding of the transformer; the second end of the second resistor R2 is grounded.
In this embodiment, the first resistor R1 and the second resistor R2 form a voltage dividing circuit, and the bias voltage of the dc bias can be adjusted by adjusting the resistance values of the first resistor R1 and the second resistor R2, so as to adapt to different communication signal voltages.
Referring to fig. 1 and 2, in an embodiment, the headset control circuit 120 includes a first bidirectional switch 121, a first headset control chip U11, and a second headset control chip U12, where a first transmission end of the first bidirectional switch 121 is connected to the first headset control chip U11, and a second transmission end of the first bidirectional switch 121 is connected to the second headset control chip U12; the third transmission end of the first bidirectional switch 121 is connected to the first input end EI1 of the power input carrier circuit 130, and the fourth transmission end of the first bidirectional switch 121 is connected to the second output end EO2 of the power input carrier circuit 130.
In this embodiment, the first earphone control chip U11 may be a control chip for implementing earphone charging control, and the second earphone control chip U12 may be a wireless communication chip, for example, a bluetooth chip. The first two-way switch 121 is provided with 5 pins, which are respectively two groups of data transmission pins and a strobe pin, each group of data transmission pins is provided with a data input pin and a data output pin, and the communication signals of the two control chips can be transmitted through the two groups of data transmission pins. The first bidirectional switch 221 may be a 2-way digital switch or a 2-way analog switch. According to the gating of the 2-way digital switch, the input/output of signals can be realized. The TX and RX signals are communicated through the 2-way digital switch to gate the first headset control chip U11 or the second headset control chip U12 so as to adapt to different voltage values of the first headset control chip U11 or the second headset control chip U12.
In some embodiments, the first earphone control chip U11 may obtain the electric quantity of the battery assembly 110 to realize the charge control of the battery assembly 110, and may also perform over-voltage and under-voltage protection on the battery according to the current electric quantity of the battery. And, the first earphone control chip U11 may be communicatively connected to the charging box 200 and output a communication signal to trigger the charging box 200 to supply power to the battery assembly 110, or trigger the charging box 200 to stop supplying power to the battery assembly 110 when the charging is finished.
It will be appreciated that the wireless headset 100 is typically used in pairs, and that pairing is typically required prior to use, and that the wireless headset 100 may also be paired with a smart electronic device such as a smart bracelet, smart watch, cell phone, etc. In some embodiments, the second earphone control chip U12 may be paired with, that is, wirelessly connected to, a wireless chip of another wireless earphone 100 provided in a pair through the charging box 200, or may be wirelessly connected to other devices through the charging box 200. Of course, the second earphone control chip U12 may also perform other functions, which are not limited herein.
Referring to fig. 1 and 2, in an embodiment, the headset control circuit 120 further includes a charging management chip U13, a signal transmission end of the charging management chip U13 is connected to the first headset control chip U11, and an output end of the charging management chip U13 is connected to the battery assembly 110.
The charging management chip U13 is based on the control of the first earphone control chip U11, the battery assembly 110 is connected with the transformer through the dc bus, and when the dc bus VBUS is connected to the power supply voltage, the charging management chip U13 performs charging control on the battery assembly 110. Typically have a dormant state, i.e., a standby state, a normal operating state, and an off state. The charge management chip U13 may further include a DC-DC conversion circuit to convert the power supply voltage into the stored energy voltage of the battery assembly 110 and output the stored energy voltage. The charge management chip U13 may also perform trickle charge, constant current charge, or constant voltage charge on the battery assembly 110 to implement a charging mode such as fast charge or slow charge on the battery assembly 110. The battery assembly 110 may be implemented by a rechargeable battery such as a dry battery, a lithium ion storage battery, or a nickel hydrogen battery. The charge management chip U13 may also operate or enter a sleep state depending on the operating state of the headset.
The invention also proposes a charging box 200 for use with the wireless headset 100 as described above.
Referring to fig. 1 and 3, the charging cartridge 200 includes:
a power supply 210;
a charging box control circuit 220;
a power output carrier circuit 230 configured to output the power supply 210 to the wireless earphone 100 via the first output terminal PO1 when the second input terminal PI2 and the second output terminal PO2 are connected to the wireless earphone 100;
the power output carrier circuit 230 is further configured to transmit the communication signal of the charging box 200 to which the first input terminal PI1 is coupled to the wireless headset 100, and/or couple the communication signal of the wireless headset 100 received by the second input terminal PI2 to the charging box control circuit 220, so as to implement the communication connection between the charging box control circuit 220 and the wireless headset 100.
In this embodiment, the charging box 200 is provided with a box body, the power supply 210 may be a storage battery, the power supply 210 is controlled by the charging box control circuit 220, and is used for providing a charging voltage for the wireless earphone 100, and providing working voltages for other circuit modules in the charging device, the power supply 210 may be implemented by using a direct current power supply, and the voltage value of the power supply 210 may be 12v,24v, which may be specifically set according to the type of the charging box 200, which is not limited herein. An electric control board is further arranged in the box body, the power output carrier circuit 230 and the charging box control circuit 220 are arranged on the electric control board, and the storage battery and the charging box control circuit 220 can be electrically connected through a flexible circuit board. The shape and the size of the accommodating cavity in the box body can be matched with those of a storage battery, an electric control board, an earphone and the like which are placed in the box body, and the accommodating cavity can be in a round shape, a square shape and the like, and is not limited. The material of the box body can be light and insulating. Or in some embodiments, a charging switch or a touch switch, such as a touch screen, may be further disposed on the lower shell of the charging box 200, where the charging switch is electrically connected to the electric control board, so as to control the battery to charge the wireless earphone 100200 or stop charging when receiving a charging switch signal input by a user.
The charging box 200 may be provided with a groove, in which a corresponding metal interface or metal probe, that is, a charging contact is configured, the charging contact is adapted to the electrical connector 120 of the wireless headset 100, when the wireless headset 100 is placed in the groove of the charging box 200, the electrical connector 120 of the wireless headset 100 contacts with the charging contact, and the elastic sheet and the metal interface are both conductive materials, so that the wireless headset 100 is electrically connected with the charging box 200. Since the wireless earphone 100 is generally used for the human ear, the wireless earphone 100 may include a pair of symmetrical shells, and two charging interfaces may be corresponding in the charging box 200. The charging cartridge 200 may also be used to house headphones when the wireless headset 100 is in a non-charging state. In some embodiments, the charging contacts may also be provided with magnetic conductors to ensure that the charging contacts are securely connected to the electrical connector 120 of the wireless headset 100 when the headset is placed on the charging contacts of the charging cartridge 200, thereby further preventing the electrical connector 120 from coming into poor contact with the charging contacts and damaging the wireless headset or the charging cartridge 200.
The power output carrier circuit 230 has a power input end, a first input end PI1, a first output end PO1, a second input end PI2, and a second output end PO2, where the power input end is connected to the power supply 210, and the first output end PO1 and the first input end PI1 are respectively coupled to the charging box control circuit 220; the second input terminal PI2 and the second output terminal PO2 are electrically connected to the wireless earphone 100.
The first output terminal PO1 of the power output carrier circuit 230 may output the power supply 210 output by the charging box 200, or may send a communication signal of the charging box 200, and the second input terminal PI2 may receive a communication signal of the earphone side. By the arrangement, the earphone and the charging box 200 can send and receive communication signals to the opposite side at the same time under the condition of charging, so that the transmission speed of the communication signals is improved, and the communication efficiency of the earphone and the charging box is improved.
It will be appreciated that the power supply 210 provided by the charging box 200 to the wireless headset 100 is dc power, and the signal for communication between the charging box 200 and the wireless headset 100 is typically an alternating signal, i.e. ac power. In this embodiment, the charging box control circuit 220 is coupled to the power input carrier circuit 130, and the communication signal of the charging box control circuit 220 can be carried to the dc signal of the power supply 210, so that the transmission of the communication signal is realized through the power line of the charging box 200, and the charging box control circuit 220 can also be coupled to the power output carrier circuit 230 to receive the wireless communication signal of the charging box 200, and avoid the output of the power voltage signal to the charging box control circuit 220.
The charging box 200 of the present invention is provided with a power supply 210, a charging box control circuit 220 and a power supply output carrier circuit 230, and when the wireless earphone 100 is placed in the charging box 200, the power supply 210 is output to the wireless earphone 100 through the first output end PO1 by the power supply output carrier circuit 230; through the power output carrier circuit 230, the communication signal of the charging box 200 coupled to the first input end PI1 may be transmitted to the wireless earphone 100, and/or the communication signal of the wireless earphone 100 received by the second input end PI2 may be coupled to the charging box control circuit 220, so as to implement communication connection with the wireless earphone 100, the charging box 200 performs handshake communication with the wireless earphone 100, after the handshake is completed, it may be determined that the earphone and the charging box 200 are in good contact at this time, and at this time, the power supply 210 may be triggered to charge the battery assembly 110 of the wireless earphone 100. The present invention enables communication between the wireless headset 100 and the charging box 200 during charging. The invention can transmit the TX and RX control signals at the same time when transmitting the voltage, and the TX signal or RX signal is carried to the direct current power supply, thereby realizing full duplex, improving the communication efficiency, reducing the time delay, ensuring the timeliness of signal transmission and having simple circuit design.
Referring to fig. 1 and 3, in some embodiments, the charging cartridge 200 may also be provided with a cartridge in detection sensor. The in-box detection sensor may send out ultrasonic wave, infrared ray, etc. signals based on the control of the charging box control circuit 220 to detect whether an earphone is put in, control the power output of the power supply 210 according to whether the earphone is put in, or other control, such as the wake-up of the charging box 200, and the sleep of the charging box 200.
Referring to fig. 1 and 3, in an embodiment, the power output carrier circuit 230 includes a coupling circuit 231 and a charging box transformer 232, and the earphone transformer 132 includes a first primary winding, a second primary winding, a first secondary winding, and a second secondary winding;
the first end of the coupling circuit 231 is a first output end of the power output carrier circuit 230, the second end of the coupling circuit 231 is a first input end of the power output carrier circuit 230, a third end of the coupling circuit 231 is connected with the first primary coil, and a fourth end of the coupling circuit 231 is connected with the second primary coil;
the first end of the first secondary winding is the second output end PO2 of the power output carrier circuit 230, and the second end of the first secondary winding is the power input end of the power output carrier circuit 230 and is connected to the second end of the second secondary winding.
In this embodiment, since the power supply 210 output by the charging box 200 is usually dc voltage, the communication signal is ac voltage, and the transformer coil plays a role of passing dc and blocking ac, for this purpose, the charging box control circuit 220 can load the communication signal into the transformer or download the earphone communication signal output by the wireless earphone 100 from the wireless earphone 100 by the coupling circuit 231. The transformer is used for coupling in/out communication signals and the power supply 210 of the charging box 200. It can be understood that the input/output of the communication signal is realized through the transformer, and the problem of mismatching of the voltage of the communication signal between the charging box 200 and the wireless earphone 100 can be solved, so that the voltage adaptation of the communication signal between the charging box 200 and the wireless earphone 100 is realized.
Referring to fig. 1 and 3, in an embodiment, the coupling circuit 231 includes a first coupling capacitor C1 and a second coupling capacitor C2, wherein a first end of the first coupling capacitor C1 is a first end of the coupling circuit 231, and a second end of the second coupling capacitor C2 is connected to the first end 2300 of the first primary coil;
The first end of the second coupling capacitor C2 is a second end of the coupling circuit 231, and the second end of the second coupling capacitor C2 is connected to the first end of the second primary coil.
In this embodiment, the first coupling capacitor C1 is used for coupling the communication signal of the charging box 200 output by the charging box control circuit 220 to the transformer, and the second coupling capacitor C2 is used for coupling the received communication signal of the wireless earphone 100 to the charging box control circuit 220, and by setting the first coupling capacitor C1 and the second coupling capacitor C2, synchronous communication between the charging box 200 and the wireless earphone 100 can be achieved, so that transmission efficiency and stability between the charging box 200 and the wireless earphone 100 can be solved.
Referring to fig. 1 and 3, in an embodiment, the charging box control circuit 220 includes a second bidirectional switch 221, a first charging box control chip U21, and a second charging box control chip U22, a first transmission end of the second bidirectional switch 221 is connected to the first earphone control chip U11, a second transmission end of the second bidirectional switch 221 is connected to the second charging box control chip U22, and a third transmission end of the second bidirectional switch 221 is connected to the first output end of the power output carrier circuit 230.
In this embodiment, the first charging box control chip U21 is a charging controller, and is specifically implemented by using a microprocessor such as a single-chip microcomputer, a DSP, and an FPGA, where after the electric quantity information of the earphone is obtained, the first charging box control chip U21 can determine whether the earphone needs to be charged according to the current electric quantity information of the earphone, for example, a charging threshold can be set in the charging controller, and when the current electric quantity information is smaller than the charging threshold, the electric quantity of the power supply 210 is output to the earphone, so as to provide the charging power for the earphone, so as to obtain the electric quantity information and the working state of the earphone. The second bidirectional switch 221 may be a 2-way digital switch or a 2-way analog switch. According to the gating of the 2-way digital switch, the input/output of signals can be realized.
The second charging box control chip U22 can be connected with communication of a mobile phone, a smart watch, a smart bracelet and the like through an earphone. In some embodiments, the second charging box control chip U22 may implement wireless chip pairing, i.e. wireless connection, of the wireless headset 100 with another wireless headset 100 that is paired with the wireless headset, or wireless connection with other devices through the charging box 200. Of course, the second charging box control chip U22 may also perform other functions, which are not limited herein.
When the earphone is put into the charging box 200, the direct current power VDD output by the power supply 210 in the charging box 200 is transmitted to the earphone transformer 132 through the charging box transformer 232; meanwhile, TX or RX signals are transmitted, a VDD direct current power supply is used as a reference carrier, and the TX and RX signals are reduced in voltage through a transformer, so that the TX and RX signals have smaller amplitude, and the transmission efficiency and stability can be improved; the earphone receiving end separates the direct current power supply VDD of the power supply 210 through a transformer to charge the system, so that the wires can transmit the power supply signal and the TX signal or the power supply signal and the RX signal at the same time; the TX and RX signals gate the first charging box control chip U21 or the second charging box control chip U22 through a 2-way digital switch, and perform communication transmission so as to adapt to different voltage values of the first charging box control chip U21 or the second charging box control chip U22.
Referring to fig. 1 and 3, in an embodiment, the charging box control circuit 220 further includes a charging management chip U13, a signal transmission end of the charging management chip U13 is connected to the first charging box control chip U21, and an output end of the charging management chip U13 is connected to the power supply 210.
In this embodiment, the charging management chip U13 is based on the control of the first charging box control chip U21, the battery assembly 110 is connected to the transformer through the dc bus, and when the dc bus VBUS is connected to the power supply voltage, the charging management chip U13 performs charging control on the battery assembly 110. Typically have a dormant state, i.e., a standby state, a normal operating state, and an off state. The charge management chip U13 may further include a DC-DC conversion circuit to convert the power supply voltage into the stored energy voltage of the battery assembly 110 and output the stored energy voltage.
The invention also provides a wireless earphone charging system, which comprises:
such as a wireless headset; and/or, as above, the charging cartridge.
The detailed structures of the wireless earphone 100 and the charging box 200 can be referred to the above embodiments, and will not be described herein again; it can be understood that, since the wireless earphone 100 and the charging box 200 are used in the wireless earphone 100 charging system of the present invention, the embodiment of the wireless earphone 100 charging system of the present invention includes all the technical solutions of all the embodiments of the wireless earphone 100 and the charging box 200, and the achieved technical effects are identical, and are not repeated herein.
The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (8)
1. A wireless headset, the wireless headset comprising:
a battery assembly;
an earphone control circuit;
the power input carrier circuit is configured to output the power supply of the connected charging box to the battery assembly when the earphone is connected to the charging box;
The power input carrier circuit is further configured to transmit the loaded earphone communication signal to the charging box; and/or downloading the received charging box communication signal to the earphone control circuit so as to realize the communication connection between the earphone control circuit and the charging box; the power input carrier circuit is provided with a power output end, a first input end, a first output end, a second input end and a second output end, wherein the power output end is connected with the battery assembly, and the first output end and the first input end are respectively connected with the earphone control circuit; the second input end and the second output end are electrically connected with the charging box; the power input carrier circuit comprises a bias circuit and an earphone transformer, wherein the earphone transformer comprises a first primary coil, a second primary coil, a first secondary coil and a second secondary coil;
the first end of the first primary coil is a first output end of the power input carrier circuit, the first end of the second primary coil is a first output end of the power input carrier circuit, and the second end of the first primary coil and the second end of the second primary coil are respectively connected with the bias circuit; the first end of the first secondary coil is a second input end of the power input carrier circuit, and the first end of the second secondary coil is a second output end of the power input carrier circuit; the second end of the first secondary coil is a power input end of the power input carrier circuit and is connected with the second end of the second secondary coil.
2. The wireless headset of claim 1, wherein the bias circuit comprises a first resistor and a second resistor, a first end of the first resistor being connected to a first direct current power supply, a second end of the first resistor being interconnected with a first end of the second resistor and a second end of the transformer primary winding; the second end of the second resistor is grounded.
3. The wireless headset of claim 1, wherein the headset control circuit comprises a first bi-directional switch, a first headset control chip, and a second headset control chip, a first transmission end of the first bi-directional switch being connected to the first headset control chip, a second transmission end of the first bi-directional switch being connected to the second headset control chip; the third transmission end of the first bidirectional switch is connected with the first input end of the power input carrier circuit, and the fourth transmission end of the first bidirectional switch is connected with the second output end of the power input carrier circuit.
4. A charging cartridge for use with a wireless headset according to any one of claims 1 to 3, the charging cartridge comprising:
a power supply;
a charging box control circuit;
A power output carrier circuit configured to output the power supply to the wireless earphone when the wireless earphone is connected to the charging box;
the power output carrier circuit is further configured to transmit the coupled and accessed charging box communication signal to the wireless earphone, and/or couple the received wireless earphone communication signal to the charging box control circuit so as to realize the communication connection between the charging box control circuit and the wireless earphone.
5. The charging cartridge of claim 4, wherein the power output carrier circuit has a power input, a first output, a second input, and a second output, the power input being coupled to the power supply, the first output and the first input being coupled to the charging cartridge control circuit, respectively; the second input end and the second output end are electrically connected with the wireless earphone.
6. The charging box of claim 5, wherein the power output carrier circuit comprises a coupling circuit and a charging box transformer, the earphone transformer comprising a first primary winding, a second primary winding, a first secondary winding, and a second secondary winding;
the first end of the coupling circuit is a first input end of the power output carrier circuit, the second end of the coupling circuit is a second output end of the power output carrier circuit, the third end of the coupling circuit is connected with the first primary coil, and the fourth end of the coupling circuit is connected with the second primary coil;
The first end of the first secondary coil is a first output end of the power output carrier circuit, the first end of the second secondary coil is a second input end of the power output carrier circuit, and the second end of the first secondary coil is a power input end of the power output carrier circuit and is connected with the second end of the second secondary coil.
7. The charging cartridge of claim 4, wherein the charging cartridge control circuit comprises a second bidirectional switch, a first charging cartridge control chip, and a second charging cartridge control chip, a first transmission end of the second bidirectional switch being connected to the first charging cartridge control chip, a second transmission end of the second bidirectional switch being connected to the second charging cartridge control chip; the third transmission end of the second bidirectional switch is connected with the first input end of the power output carrier circuit, and the fourth transmission end of the second bidirectional switch is connected with the second output end of the power output carrier circuit.
8. A wireless headset charging system, the wireless headset charging system comprising: a wireless headset according to any one of claims 1 to 3; and/or a charging cartridge as claimed in any one of claims 4 to 7.
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| CN111490806A (en) * | 2020-04-20 | 2020-08-04 | 歌尔科技有限公司 | Communication method, earphone and earphone communication system |
| CN112104945B (en) * | 2020-09-30 | 2022-07-22 | 歌尔科技有限公司 | Communication method, charging box, wireless earphone and computer storage medium |
| CN114430517A (en) * | 2020-10-29 | 2022-05-03 | 华为技术有限公司 | Earphone assembly |
| CN112511945B (en) * | 2020-12-03 | 2022-11-22 | 歌尔科技有限公司 | Wireless earphone box with intelligent voice function |
| CN112511944B (en) * | 2020-12-03 | 2022-09-20 | 歌尔科技有限公司 | Multifunctional earphone charging box |
| CN113179108B (en) * | 2021-04-09 | 2023-01-03 | Oppo广东移动通信有限公司 | Signal transmission method and device, electronic equipment and readable storage medium |
| CN114531178B (en) * | 2022-01-28 | 2023-03-21 | 珠海昇生微电子有限责任公司 | Charging and bidirectional communication system and method |
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