CN205105379U - Bluetooth speaker , voice data line and bluetooth speaker system - Google Patents
Bluetooth speaker , voice data line and bluetooth speaker system Download PDFInfo
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Abstract
The utility model relates to a bluetooth speaker, its matching voice data line and bluetooth speaker system. Bluetooth speaker includes: audio output selection circuit and data interface circuit, audio output selection circuit includes audio signal input, control signal input, an audio signal output and the 2nd audio signal output, the data interface circuit includes bluetooth speaker charge interface, audio signal output interface and control signal output interface, the data interface circuit with audio output selection circuit connects for a control signal and the 2nd control signal that will insert the voice data line and produce export to audio output selection circuit. A bluetooth speaker system, includes above -mentioned bluetooth speaker and voice data line. Implement the utility model discloses can make bluetooth speaker charge the interface and not only for bluetooth speaker charges, have the audio signal output function simultaneously, and this scheme does not change the bluetooth speaker appearance design, do not change former product software design, can effectively practice thrift the cost.
Description
Technical Field
The utility model relates to a bluetooth speaker field, more specifically say, relate to a bluetooth speaker, audio data line and bluetooth speaker system.
Background
Along with the popularization of portable devices such as mobile phones and tablets, the sales volume of the Bluetooth sound box is also increased year by year; terminal users enjoy music and change from the previous mode of purchasing compact discs, downloading from compact discs to mobile phones and purchasing from the internet, and most users have tended to play music on portable devices.
In this context, music is enjoyed through bluetooth devices is a good solution. The bluetooth speaker is a mobile audio playing device which is commonly used at present, and is convenient to carry.
Meanwhile, many families also purchase sound equipment with a high price in the DVD era, but the existing equipment cannot meet modern requirements due to the fact that the existing equipment cannot be connected with equipment such as a mobile phone and a tablet and the like through Bluetooth because the existing equipment does not have a Bluetooth receiving and processing function. Moreover, the current bluetooth speaker is limited to a low power design (less than 10W), and the playing volume and the sound quality of the current bluetooth speaker cannot be compared with those of a high power hi-fi speaker.
How to make the sound equipment without the bluetooth circuit access the audio signal through the audio playing equipment with the bluetooth circuit is very necessary. The existing Bluetooth sound box is used as intermediate equipment, so that the existing Bluetooth sound box outputs audio signals to the sound box without a Bluetooth receiving circuit, and the existing Bluetooth sound box is a practical solution.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in providing a selectable output audio signal's bluetooth speaker.
The to-be-solved technical problem of the utility model is to provide a can match with bluetooth speaker, select output audio signal's audio data line.
The to-be-solved technical problem of the present invention is to provide a bluetooth speaker system capable of selectively outputting audio signals.
The utility model provides a technical scheme that its technical problem adopted is: construct a bluetooth speaker and match this bluetooth speaker's audio data line, bluetooth speaker includes:
the Bluetooth sound box comprises a Bluetooth receiving and processing circuit, an audio playing circuit and a power supply, and is characterized by further comprising an audio output selection circuit and a data interface circuit;
the audio output selection circuit comprises an audio signal input end, a control signal input end, a first audio signal output end and a second audio signal output end;
the data interface circuit is connected with the audio output selection circuit and outputs a control signal generated by accessing the audio data line to the audio output selection circuit;
the audio output selection circuit has an audio signal input end connected with the output end of the Bluetooth receiving processing circuit, a control signal input end connected with the data interface circuit, and a first audio signal output end communicated with the audio playing circuit to output audio signals or a second audio signal output end communicated with the data interface circuit to output audio signals according to the control signal.
In the bluetooth speaker of the present invention, the data interface circuit includes a charging interface, a ground interface, an audio signal interface and a control signal output interface of the bluetooth speaker, and the control signal includes a first control signal and a second control signal;
when the control signal input end of the audio output selection circuit receives the first control signal, the audio output selection circuit selects the first audio signal output end to output the audio signal;
when the control signal input end of the audio output selection circuit receives the second control signal, the audio output selection circuit selects the second audio signal output end to output the audio signal.
In the bluetooth speaker of the present invention, the data interface circuit includes a Micro-USB interface; wherein,
the charging interface of the Bluetooth sound box is a power pin (VBUS) of a Micro-USB interface;
the Bluetooth sound box grounding interface is a grounding pin (GND) of the Micro-USB interface;
the audio signal interface is a data pin (D-, D +) of the Micro-USB interface;
the control signal output interface is an ID pin (ID) of the Micro-USB interface;
the ID pin is connected with a power supply through a pull-up resistor, and the control signal is a voltage signal of the ID pin and is output to the control signal input end to be connected.
In the bluetooth speaker, the data pin includes left channel signal pin and right channel signal pin.
In the bluetooth sound box of the utility model, the bluetooth receiving and processing circuit comprises a stereo output circuit which comprises a left sound channel output end and a right sound channel output end;
the audio output selection circuit comprises a left channel audio output selection circuit and a right channel audio output selection circuit; wherein,
the left channel audio output selection circuit comprises a left channel audio signal input end connected with the left channel output end, a left channel control signal input end connected with the control signal input end, a left channel first audio signal output end which is communicated with the audio playing circuit according to the control signal selection, and a left channel second audio signal output end which is communicated with the data interface circuit according to the control signal selection;
the right channel audio output selection circuit comprises a right channel audio signal input end connected with the right channel output end, a right channel control signal input end connected with the control signal input end, a right channel first audio signal output end which is communicated with the audio playing circuit according to the control signal selection, and a right channel second audio signal output end which is communicated with the data interface circuit according to the control signal selection.
The utility model discloses still construct an audio data line, include the data connection who matches with the data interface circuit of the bluetooth speaker that constructs.
In the audio data line of the present invention, the data connector includes a Micro-USB interface, and the Micro-USB interface includes a first pin, a second pin, a third pin, a fourth pin, and a fifth pin; the first pin is a null pin, and the fourth pin and the fifth pin are grounded together;
the first pin corresponds to a Bluetooth sound box charging interface of the data interface circuit;
the second pin and the third pin correspond to an audio signal interface of the data interface circuit;
the fourth pin corresponds to a control signal output interface of the data interface circuit;
the fifth pin corresponds to a ground interface of the data interface circuit.
Among the audio data line, second pin and third pin are left channel signal pin and right channel signal pin respectively.
The utility model discloses still construct a bluetooth speaker system, include bluetooth speaker and the audio data line that matches with bluetooth speaker.
In the bluetooth speaker system of the utility model,
when the audio data line is not connected with the audio data interface circuit, the control signal output end of the data interface circuit is connected with a power supply of the Bluetooth sound box through a pull-up resistor, the control signal output end of the data interface circuit outputs a first control signal to the control signal input end of the audio output selection circuit, and the audio selection circuit selects the first audio signal output end to be communicated with the audio playing circuit to output an audio signal;
when the audio data line is connected with the audio data interface circuit, the control signal output end of the data interface circuit is grounded through the audio data line, the control signal output end of the data interface circuit outputs a second control signal to the control signal input end of the audio output selection circuit, and the audio selection circuit selects the second audio signal output end to be communicated with the data interface circuit to output an audio signal.
Implement the utility model discloses following beneficial effect has: the data interface circuit is connected to the audio data line to generate a control signal, and the audio output selection circuit selects the output of the audio signal according to the control signal, so that the function of the data interface circuit of the Bluetooth sound box is expanded, the Bluetooth sound box can be charged, and the audio output selection circuit has an audio signal output function, so that the appearance design of the Bluetooth sound box is prevented from being changed, and a new die is not needed; and moreover, the system has automatic identification and switching functions, does not change the original product software design, and can effectively save the cost.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is a schematic structural view of the bluetooth sound box of the present invention;
fig. 2 is a chip schematic diagram of the first embodiment of the audio output selection circuit of the bluetooth speaker of the present invention;
FIG. 3 is a schematic diagram of the system of the present invention in which the audio output selection circuit outputs audio of the Bluetooth speaker is a single channel;
FIG. 4 is a schematic view of the connection of the Micro-USB audio data line according to the first embodiment of the present invention;
FIG. 5 is a schematic diagram of the stereo system according to the present invention;
fig. 6 is a schematic diagram of a second embodiment of the present invention illustrating a Micro-USB audio data line connection.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, it is an embodiment of the bluetooth speaker system of the present invention, which includes a bluetooth speaker and an audio data line 500 matching with the bluetooth speaker. The audio data line 500 is matched with the interface of the data interface circuit 400 of the bluetooth speaker.
The bluetooth speaker comprises a bluetooth receiving processing circuit 100, an audio playing circuit 300 and a power supply 600, and further comprises an audio output selection circuit 200 and a data interface circuit 400. The audio output selection circuit 200 selects the audio playback circuit 300 or the data interface circuit 400 to output the audio signal according to the control signal.
The audio output end of the bluetooth receiving processing circuit 100 is connected to the audio signal input end 201 of the audio output selecting circuit 200, and is configured to process the received bluetooth audio signal and output the processed audio signal to the audio signal input end 201 of the audio output selecting circuit 200. The bluetooth receiving processing circuit can be a single-channel circuit or a stereo circuit, so that the audio signal output by the processing circuit can be a single-channel audio signal or a stereo audio signal.
The audio output selection circuit 200 includes an audio signal input 201, a control signal input 202, a first audio signal output 203, and a second audio signal output 204. The audio signal input terminal 201 is connected to the audio output terminal of the bluetooth receiving processing circuit 100, and is used for accessing the audio signal processed by the bluetooth receiving processing circuit 100.
The control signal input terminal 202 is connected to the control signal output terminal 402 of the data interface module 400, and is used for accessing a control signal to select the first audio signal output terminal 203 or the second audio signal output terminal 204 to output an audio signal.
The first audio signal output terminal 203 is connected to the audio playing circuit 300 of the bluetooth speaker, the second audio signal output terminal 204 is connected to the audio signal interface of the data interface circuit 400, and the first audio signal output terminal is selected to be connected to the audio playing circuit to output audio signals according to the control signal, or the second audio signal output terminal is selected to be connected to the data interface circuit to output audio signals.
The audio playing circuit 300 is a bluetooth sound box connected to the first audio output terminal 203 of the audio output selection circuit, and is an audio playing circuit of the bluetooth sound box itself, which may be a monaural audio playing circuit or a stereo audio playing circuit; when the circuit is a stereo playing circuit, a left channel audio input interface and a right channel audio input interface are included.
The data interface circuit 400 comprises a bluetooth sound box charging interface, a grounding interface, an audio signal interface and a control signal output interface, wherein the control signal comprises a first control signal and a second control signal;
when the control signal input end of the audio output selection circuit receives the first control signal, the audio output selection circuit selects the first audio signal output end to output the audio signal;
when the control signal input end of the audio output selection circuit receives the second control signal, the audio output selection circuit selects the second audio signal output end to output the audio signal.
The data interface circuit 400 may be a common interface circuit of a charging interface and a data interface. When the data interface circuit 400 is inserted through a charging wire, the Bluetooth sound box is charged, and the data interface circuit of the Bluetooth sound box does not output a control signal and an audio signal in the charging process; when the data interface circuit 400 is connected through the audio data line 500, the audio signal is output through the data interface circuit 400 and is output to the external device through the audio data line 500.
The power supply 600 is a power supply unit of the bluetooth speaker, and can select energy storage batteries such as lithium batteries and compound batteries, and supplies power for the bluetooth speaker after charging.
The utility model discloses the bluetooth speaker system of structure includes the bluetooth speaker of structure and rather than the audio data line that matches, and its working process is:
when the audio data line 500 is not connected to the audio data interface circuit 400, the data interface circuit 400 controls the signal output terminal 402 to be connected to the power supply 600 of the bluetooth speaker through the pull-up resistor R, the data interface circuit 400 controls the signal output terminal 402 to output a first control signal to the control signal input terminal 202 of the audio output selection circuit 200, and the audio selection circuit 200 selects the first audio signal output terminal 203 to be connected to the audio playback circuit 300 to output an audio signal;
when the audio data line 500 is connected to the audio data interface circuit 400, the data interface circuit 400 controls the signal output terminal 402 to be grounded via the audio data line 500, the data interface circuit 400 controls the signal output terminal 402 to output a second control signal to the control signal input terminal 202 of the audio output selection circuit 200, and the audio selection circuit 200 selects the second audio signal output terminal 204 to be connected to the data interface circuit 400 to output an audio signal.
As shown in fig. 1, fig. 2, fig. 3, and fig. 4, for the first preferred embodiment of the present invention, the bluetooth speaker audio output selection circuit 200 selects a bcadchip 4157 chip of Broadchip company, the bluetooth speaker data interface circuit 400 selects a Micro-USB interface, and the bluetooth receiving processing circuit of the bluetooth speaker outputs audio signals as monaural signals. It is understood that other chips with similar functions may be used for the bluetooth speaker audio output selection circuit 200.
In the preferred embodiment, the internal block of the BCT4157 chip used is shown in fig. 2, which has 6 pins: power supply positive (VCC), Ground (GND), switch pin (S), B0 output, B1 output, a input.
The input a is an audio signal input terminal 201 of the audio output selection circuit, the switch pin is a control signal input terminal 202 of the audio output selection circuit 200, and the outputs B0 and B1 are respectively an audio output selection circuit first audio output terminal 204 and a second audio output terminal 203.
The truth table of the BCT4157 chip used in this example is:
| logic input (S) | Function(s) |
| 0 | B0 is connected to A |
| 1 | B1 is connected to A |
As can be seen from the table, the low level of the BCT4157 chip switching pin corresponds to the B0 output pin, and the B0 output pin is connected to the Micro-USB audio signal output pin; the output pin of B1 is connected to the input end of audio playing circuit of Bluetooth speaker.
Pin a of the chip is connected to the audio output terminal of the bluetooth reception processing circuit 100, and receives the audio signal processed by the bluetooth reception processing circuit 100.
The switching pin of the chip is the control signal output terminal (ID pin) of the data interface circuit 400, and the control signal output terminal 402 of the data interface circuit 400 is connected to the power supply 600 of the bluetooth speaker through the pull-up resistor R.
The data interface circuit selected in this embodiment is a Micro-USB interface, and includes a first pin, a second pin, a third pin, a fourth pin, and a fifth pin, where standard pins of the interface are defined as follows:
the first pin is a positive power supply (VBUS), the fifth pin is a common ground GND, the second pin and the third pin are data D-and D +, the fourth pin is an ID pin, the pin is an extended function pin, and most products are not connected. The power supply positive (VBUS) corresponds to a charging interface of the Bluetooth sound box, the public ground GND corresponds to a grounding interface, the data D-and D + correspond to an audio signal interface, and the ID pin corresponds to a control signal output interface.
In the present embodiment, this ID pin is used to identify whether the Micro-USB signal line is inserted. The specific implementation process is as follows:
the Bluetooth sound box mainboard comprises a Micro-USB interface, an ID pin of the Micro-USB interface is connected to a mainboard main power supply (+ 3.3-5V) through a pull-up resistor, and the resistance value of the pull-up resistor is 10 kilohms or a proper resistance value is selected according to requirements.
The audio data line interface adopted in this embodiment is matched with the data interface circuit interface of the bluetooth sound box, that is, the interface is a Micro-USB interface, and the specific audio data line connection mode is as shown in fig. 4.
The ports are defined as follows:
Micro-USB interface pin definition (Bluetooth speaker side)
| Pin number | Definition of functions |
| 1 | Rear positive VBUS |
| 2 | Monophonic signal V |
| 3 | Monophonic signal V |
| 4 | Signal detection ID |
| 5 | Ground GND |
Micro USB interface pin definition (wire side)
| Pin number | Definition of functions |
| 1 | Hollow foot |
| 2 | Monophonic signal V |
| 3 | Monophonic signal V |
| 4 | Ground GND |
| 5 | Ground GND |
Under the definition, the Micro-USB interface on the Bluetooth sound box side has a conventional Micro-USB charging function, is compatible with all Micro-USB charging wires on the market and also has a unique USB audio output function. When the Micro-USB interface on the wire side is matched with the scheme for use, all functions of the scheme can be completed, and the Micro-USB interface can not be influenced when being mistakenly accessed into the traditional USB equipment.
Through the BCT4157 chip, the Micro-USB interface and the Micro-USB audio data line, the specific working process of the embodiment is as follows:
when the Micro-USB audio data line 500 is not connected to the Micro-USB interface of the bluetooth speaker, the ID pin of the Micro-USB interface of the bluetooth speaker is connected to the power supply through the pull-up resistor, so as to obtain a high potential (i.e., a first control signal), i.e., the switch pin of the BCT4157 chip obtains a high potential, and according to the truth table of the BCT4157 chip, the chip selects B1 to output an audio signal to the audio playing circuit 300 of the bluetooth speaker itself.
When the Micro-USB audio data line 500 is connected with the Micro-USB interface of the Bluetooth sound box, the ID pin of the Micro-USB interface of the Bluetooth sound box is grounded through the audio data line to obtain a low potential (namely, a second control signal), namely, the switching pin of the BCT4157 chip obtains the low potential, and according to the truth table of the BCT4157 chip, the chip selection B0 outputs an audio signal to the data pin D-or D + of the Micro-USB interface of the Bluetooth sound box, and then outputs the audio signal to the sound box without the Bluetooth receiving processing circuit through the Micro-USB audio data line 500.
When the Bluetooth sound box does not need to output audio signals, only the Micro-USB audio data line 500 needs to be pulled out, the ID pin of the Micro-USB interface of the Bluetooth sound box is connected with a power supply through a pull-up resistor, high potential is obtained, namely the switching pin of the BCT4157 chip obtains high potential, and according to the truth table of the BCT4157 chip, the chip selection B1 outputs audio signals to the audio playing circuit 300 of the Bluetooth sound box.
According to the working process, the Bluetooth sound box only needs to be inserted into an audio data line without software operation to output the audio signal from the charging interface; when audio signal output is not needed, only the audio data line needs to be pulled out, the Bluetooth sound box can automatically switch the audio signal output port to output to the audio playing circuit of the Bluetooth sound box, and software operation is not needed.
In another preferred embodiment of the present technical solution, as shown in fig. 5 and fig. 6, the output audio signal of the bluetooth speaker bluetooth receiving processing circuit is stereo, and at this time, the audio output selection circuit includes a left channel audio output selection circuit and a right channel audio output selection circuit.
The Bluetooth receiving and processing circuit comprises a stereo output circuit which comprises a left sound channel output end L and a right sound channel output end R.
The left channel audio output selection circuit comprises a left channel audio signal input end, a left channel control signal input end, a left channel first audio signal output end and a left channel second audio signal output end;
the right channel audio output selection circuit comprises a right channel audio signal input end, a right channel control signal input end, a right channel first audio signal output end and a right channel second audio signal output end.
As shown in fig. 5, the output audio signal end of the bluetooth receiving and processing circuit of the bluetooth speaker is divided into a left channel audio output end L and a right channel audio output end R, and the left channel audio output end and the right channel audio output end are respectively connected with an audio input end a of a BCT4157 chip;
the control signal input ends S of the two BCT4157 chips are connected with the ID pins of the Micro-USB;
the left sound channel BCT4157 chip audio signal output end B1 is connected with an audio playing circuit of the Bluetooth sound box, and the left sound channel BCT4157 chip audio signal output end B0 is connected with a left sound channel pin of a Micro-USB;
the audio signal output end B1 of the right channel BCT4157 chip is connected with an audio playing circuit of the Bluetooth sound box, and the audio signal output end B0 of the right channel BCT4157 chip is connected with a right channel pin of the Micro-USB;
the audio data line interface adopted in this embodiment is matched with the data interface circuit interface of the bluetooth sound box, that is, the interface is a Micro-USB interface, and the specific audio data line connection mode is as shown in fig. 6.
The specific working process of the Bluetooth sound box is the same as that of the previous preferred embodiment, namely when the Micro-USB interface is not connected with the audio data line, the Bluetooth sound box selects the audio playing circuit to play audio signals; when the Micro-USB interface is connected with the audio data line, the Bluetooth sound box selects the Micro-USB interface to output audio signals, and details are not repeated.
The audio selection circuit selected by the preferred embodiment in the scheme is a BCT4157 chip, and other chips with the technical characteristics of the audio selection circuit in the technical scheme can also be selected.
The data interface circuit selected by the preferred embodiment in the present solution is a Micro-USB interface, and an interface having the technical characteristics of the data interface circuit in the present technical solution may also be selected.
This scheme still includes a bluetooth speaker system, and this bluetooth speaker system includes above-mentioned bluetooth speaker and the audio data line that matches with bluetooth speaker.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and implement the present invention accordingly, which can not limit the protection scope of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention shall fall within the scope of the claims of the present invention.
Claims (10)
1. A Bluetooth sound box comprises a Bluetooth receiving and processing circuit (100), an audio playing circuit (300) and a power supply (600), and is characterized by further comprising an audio output selection circuit (200) and a data interface circuit (400);
the audio output selection circuit (200) comprises an audio signal input (201), a control signal input (202), a first audio signal output (203) and a second audio signal output (204);
the data interface circuit (400) is connected with the audio output selection circuit (200) and outputs a control signal generated by accessing an audio data line (500) to the audio output selection circuit (200);
an audio signal input end (201) of the audio output selection circuit (200) is connected with an output end of the Bluetooth receiving processing circuit (100), a control signal input end (202) of the audio output selection circuit (200) is connected with the data interface circuit (400), and the audio output selection circuit (200) selects the first audio signal output end (203) to be communicated with the audio playing circuit (300) to output an audio signal or the second audio signal output end (204) to be communicated with the data interface circuit (400) to output an audio signal according to the control signal.
2. The bluetooth speaker of claim 1, wherein the data interface circuit (400) comprises a bluetooth speaker charging interface, a ground interface, an audio signal interface (401), and a control signal output interface (402), and wherein the control signals comprise a first control signal and a second control signal;
when the control signal input end (202) of the audio output selection circuit (200) receives the first control signal, the audio output selection circuit (200) selects the first audio signal output end (203) to output an audio signal;
when the control signal input end (202) of the audio output selection circuit (200) receives the second control signal, the audio output selection circuit (200) selects the second audio signal output end (204) to output an audio signal.
3. The bluetooth speaker of claim 2, wherein the data interface circuit (400) comprises a Micro-USB interface; wherein,
the Bluetooth sound box charging interface is a power pin (VBUS) of the Micro-USB interface;
the Bluetooth sound box grounding interface is a grounding pin (GND) of the Micro-USB interface;
the audio signal interface (401) is a data pin (D-, D +) of the Micro-USB interface;
the control signal output interface (402) is an ID pin (ID) of the Micro-USB interface;
the ID pin (ID) is connected with the power supply (600) through a pull-up resistor (R), and the control signal is a voltage signal of the ID pin (ID) and is output to the control signal input end (202) for connection.
4. The Bluetooth speaker of claim 3, wherein the data pins (D-, D +) include a left channel signal pin (D-), and a right channel signal pin (D +).
5. The Bluetooth speaker of claim 4, wherein the Bluetooth reception processing circuit (200) comprises a stereo output circuit comprising a left channel output and a right channel output;
the audio output selection circuit (200) comprises a left channel audio output selection circuit and a right channel audio output selection circuit; wherein,
the left channel audio output selection circuit comprises a left channel audio signal input end connected with the left channel output end, a left channel control signal input end connected with the control signal input end (202), a left channel first audio signal output end which is communicated with the audio playing circuit (300) according to the control signal, and a left channel second audio signal output end which is communicated with the data interface circuit (400) according to the control signal;
the right channel audio output selection circuit comprises a right channel audio signal input end connected with the right channel output end, a right channel control signal input end connected with the control signal input end (202), a right channel first audio signal output end communicated with the audio playing circuit (300) according to the control signal, and a right channel second audio signal output end communicated with the data interface circuit (400) according to the control signal.
6. An audio data cable comprising a data connector for mating with the data interface circuit (400) of the bluetooth speaker of any one of claims 1-5.
7. The audio data line of claim 6, wherein the data connector comprises a Micro-USB interface, and the Micro-USB interface comprises a first pin, a second pin, a third pin, a fourth pin, and a fifth pin; the first pin is a null pin, and the fourth pin and the fifth pin are grounded together;
the first pin corresponds to a Bluetooth sound box charging interface of the data interface circuit (400);
the second pin and the third pin correspond to an audio signal interface of the data interface circuit (400);
the fourth pin corresponds to a control signal output interface of the data interface circuit (400);
the fifth pin corresponds to a ground interface of the data interface circuit (400).
8. The audio data line (500) of claim 7, wherein the second pin and the third pin are a left channel signal pin and a right channel signal pin, respectively.
9. A bluetooth speaker system, comprising the bluetooth speaker of any one of claims 1 to 5 and the audio data line of any one of claims 6 to 8.
10. The Bluetooth speaker system of claim 9,
when the audio data line (500) is not connected with the audio data interface circuit (400), the data interface circuit (400) controls the signal output end (402) to be connected with the power supply (600) of the Bluetooth speaker through a pull-up resistor (R), the data interface circuit (400) controls the signal output end (402) to output the first control signal to the control signal input end (202) of the audio output selection circuit (200), and the audio selection circuit (200) selects the first audio signal output end (203) to be communicated with the audio playing circuit (300) to output an audio signal;
when the audio data line (500) is connected with the audio data interface circuit (400), the control signal output end (402) of the data interface circuit (400) is grounded through the audio data line (500), the control signal output end (402) of the data interface circuit (400) outputs a second control signal to the control signal input end (202) of the audio output selection circuit (200), and the audio selection circuit (200) selects the second audio signal output end (204) to be communicated with the data interface circuit (400) to output an audio signal.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106792357A (en) * | 2016-12-31 | 2017-05-31 | 深圳市优必选科技有限公司 | Bluetooth sound box circuit and robot interaction system |
| CN109362012A (en) * | 2018-12-11 | 2019-02-19 | 深圳创维数字技术有限公司 | Wire and wireless signal transmits conversion method, loudspeaker and storage medium |
| CN114866115A (en) * | 2022-04-25 | 2022-08-05 | 哲库科技(上海)有限公司 | Bluetooth conversion equipment, charging bin and audio playing system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106792357A (en) * | 2016-12-31 | 2017-05-31 | 深圳市优必选科技有限公司 | Bluetooth sound box circuit and robot interaction system |
| CN109362012A (en) * | 2018-12-11 | 2019-02-19 | 深圳创维数字技术有限公司 | Wire and wireless signal transmits conversion method, loudspeaker and storage medium |
| CN114866115A (en) * | 2022-04-25 | 2022-08-05 | 哲库科技(上海)有限公司 | Bluetooth conversion equipment, charging bin and audio playing system |
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