Vehicle-mounted audio playing device, vehicle-mounted audio system and vehicle

Abstract

The utility model discloses a vehicle-mounted audio playing device, a vehicle-mounted audio system and a vehicle. The vehicle-mounted audio playing device comprises a loudspeaker, a power amplifier and a wireless communication conversion module, an output interface of the power amplifier is connected with the loudspeaker; the output interface of the wireless communication conversion module is in wired communication connection with the audio input interface of the power amplifier, and the output interface of the wireless communication conversion module comprises an audio output interface and / or a control information output interface. Wherein the input interface of the wireless communication conversion module is used for being in wireless communication connection with external equipment so as to send audio data and / or control information received from the external equipment to the power amplifier. Through the mode, the external equipment can control the power amplifier to work through wireless communication, and the convenient and personalized requirements of the vehicle-mounted audio playing device in use are met.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle-mounted audio equipment, and in particular to a vehicle-mounted audio playback device, a vehicle-mounted audio system and a vehicle. Background Art

[0002] An audio amplifier, also known as an audio power amplifier, is a device used to amplify the power of audio signals to drive speakers and reproduce sound.

[0003] More and more vehicles are equipped with in-vehicle audio playback devices. The power amplifier of the audio playback device in the conventional in-vehicle audio playback device needs to be connected to the vehicle computer to achieve audio playback, which cannot meet the needs of convenience and personalization. Utility Model Content

[0004] The main technical problem solved by the present application is to provide a vehicle-mounted audio playback device, a vehicle-mounted audio system and a vehicle, and a vehicle-mounted audio playback device, so that an external device can control the operation of a power amplifier through wireless communication, thereby meeting the needs of convenient and personalized use of the vehicle-mounted audio playback device.

[0005] In order to solve the above technical problems, a technical solution adopted by the present application is: to provide a vehicle-mounted audio playback device, including: a speaker, a power amplifier, and a wireless communication conversion module; the output interface of the power amplifier is connected to the speaker; the output interface of the wireless communication conversion module is connected to the audio input interface of the power amplifier by wired communication, and the output interface of the wireless communication conversion module includes an audio output interface and / or a control information output interface. Among them, the input interface of the wireless communication conversion module is used for wireless communication connection with an external device to send the audio data and / or control information received from the external device to the power amplifier.

[0006] The vehicle audio playback device includes an audio transfer module, the audio transfer module includes an audio input interface and a control information input interface, the audio input interface of the audio transfer module is used to connect to the vehicle system in the vehicle, the control information input interface of the audio transfer module is used to connect to the vehicle system to receive control signals, the audio transfer module includes an output interface connected to the power amplifier, and the output interface of the audio transfer module includes an audio output interface and / or a control information output interface. The wireless communication conversion module includes a control information output interface, and the control information output interface of the wireless communication conversion module is connected to the control information input interface of the audio transfer module so that the audio transfer module stops sending audio data and / or control information to the power amplifier after receiving the stop working instruction sent by the wireless communication conversion module.

[0007] The audio transfer module includes an A2B chip, and / or the wireless communication conversion module includes a WiFi chip.

[0008] Among them, the audio input interface of the audio transfer module includes an audio data interface in at least one format.

[0009] Among them, the vehicle-mounted audio playback device includes a monitoring module, the detection end of the monitoring module is connected to the power amplifier, and the monitoring module is respectively communicated with the wireless communication conversion module and the audio transfer module to send the detection results of the power amplifier to the wireless communication conversion module and / or the audio transfer module.

[0010] Among them, the device includes a power supply module, the power supply module includes a power input interface and a power output interface, the power input interface is used to connect to the power supply device in the vehicle, and the power output interface is respectively connected to the wireless communication conversion module and the audio transfer module.

[0011] Among them, the power supply module includes a boost circuit, a first buck circuit and a second buck circuit, and the input end of the boost circuit and the input end of the first buck circuit are both used to connect to the power input interface; the power output interface includes a boost output interface, a first buck output interface and a second buck output interface, the output end of the boost circuit is connected to the boost output interface, and the boost output interface provides a working voltage for the power amplification module; the output end of the first buck circuit is connected to the first buck output interface, the input end of the second buck circuit is connected to the first buck output interface, and the second buck output interface provides a working voltage for the audio transfer module; the output end of the second buck circuit is connected to the second buck output interface, and the second buck output interface provides a working voltage for at least one of the wireless communication conversion module and the monitoring module.

[0012] Among them, the vehicle-mounted audio playback device includes a switch module, the input end of the switch module is used to be connected to an external power supply, and the output end of the switch module is connected to a power supply module for enabling control of the power supply module.

[0013] In order to solve the above technical problems, another technical solution adopted in the present application is: to provide a car audio system, which includes any of the above-mentioned car audio playback devices.

[0014] In order to solve the above technical problem, another technical solution adopted in the present application is: providing a vehicle, which includes the above-mentioned vehicle audio system.

[0015] The beneficial effect of the present application is as follows: different from the prior art, the vehicle-mounted audio playback device of the present application is wirelessly connected to an external device through an input interface of a wireless communication conversion module, the external device communicates with the wireless communication conversion module through wireless signals, and the wireless communication conversion module is wiredly connected to the audio input interface of the power amplifier, so that the wireless communication conversion module transmits the wireless signal transmitted by the external device to the power amplifier by wire, thereby enabling the external device to control the operation of the power amplifier through wireless communication, thereby meeting the convenient and personalized needs of using the vehicle-mounted audio playback device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an embodiment of the vehicle audio playback device of the present application;

[0017] Figure 2 This is a schematic diagram of the structure of a power supply module of an embodiment of the vehicle-mounted audio playback device of the present application;

[0018] Figure 3 It is a structural schematic diagram of an embodiment of the vehicle audio system of the present application;

[0019] Figure 4 It is a structural schematic diagram of a vehicle embodiment of the present application. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings of the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0021] It should be understood that the features of the terms "first" and "second" in the specification and claims of the present application may explicitly or implicitly include one or more of the features. In addition, the "and / or" in the specification and claims is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0022] It should be understood that the terms "include", "comprises" or any other variations used herein are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "includes..." do not exclude the presence of other identical elements in the process, method, article or device that includes the elements.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In order to make the purpose, technical solution and effect of the present application clearer and more specific, the present application is further described in detail below with reference to the accompanying drawings and examples.

[0025] The present application provides a vehicle-mounted audio playback device, referring to Figure 1 , Figure 1 1 is a schematic diagram of the structure of an embodiment of the vehicle audio playback device of the present application, the vehicle audio playback device 100 comprises: a speaker 30. A power amplifier 20, the output interface of the power amplifier 20 is connected to the speaker 30. A wireless communication conversion module 70, the output interface of the wireless communication conversion module 70 is connected to the audio input interface of the power amplifier 20 by wired communication, and the output interface of the wireless communication conversion module 70 comprises an audio output interface and / or a control information output interface.

[0026] Among them, the speaker 30 can be an electroacoustic transducer, for example, an electric, capacitive, piezoelectric, electromagnetic, ionic and pneumatic speaker. The power amplifier 20 can be a device that amplifies a weak signal to drive the speaker 30 to make a sound, for example, a class A power amplifier, a class B power amplifier, a class AB power amplifier and a class D power amplifier. The wireless communication conversion module 70 can be a chip module that supports an audio transmission protocol such as a TDM protocol. The wireless communication conversion module 70 converts audio signals and wireless signals to each other, and can perform audio processing operations on an external device through the output interface of the wireless communication conversion module 70. In some application scenarios, the output interface of the wireless communication conversion module 70 includes an audio output interface, which is used to connect to the input interface of the power amplifier 20. In some application scenarios, the output interface of the wireless communication conversion module 70 includes a control information output interface, which is used to connect to the control information input interface of the power amplifier 20. In some application scenarios, the output structure of the wireless communication conversion module 70 includes an audio output interface and a control signal output interface. The audio output interface is used to connect to the audio input interface of the power amplifier 20, and the control information output interface is used to connect to the control information input interface of the power amplifier 20.

[0027] The input interface of the wireless communication conversion module 70 is used to wirelessly connect with an external device to send the audio data and / or control information received from the external device to the power amplifier 20. The external device can be any device with a wireless communication function, such as a mobile phone, a computer, etc. This application is not limited here. Specifically, the wireless communication conversion module 70 can convert the audio data sent by the external device according to the wireless communication protocol between the wireless communication conversion module 70 and the power amplifier 20 after receiving the audio data sent by the external device, and then send the converted audio data to the power amplifier 20 according to the wired communication protocol between the wireless communication conversion module 70 and the power amplifier 20.

[0028] In the above scheme, the power amplifier 20 can obtain information through the wireless communication conversion module 70. The power amplifier 20 can obtain information sent by the external device through wireless communication. The application terminal is wirelessly connected to the wireless communication conversion module 70, so that the external device and the wireless communication conversion module 70 can communicate through wireless signals. The wireless communication conversion module 70 is connected to the power amplifier 20 by wired communication, so that the wireless communication conversion module 70 transmits the wireless signal transmitted by the external device to the power amplifier 20 by wire, so that the external device controls the power amplifier 20 to work through wireless communication, meeting the convenient and personalized needs of the vehicle audio playback device 100.

[0029] In some embodiments, the output interface of the wireless communication conversion module 70 includes an audio output interface, and the audio output interface is connected to the audio input interface of the power amplifier 20 by wired communication. The input interface of the wireless communication conversion module 70 is used to wirelessly connect with an external device to send the audio data received at the external device to the power amplifier 20. The wireless communication conversion module 70 includes an interface chip that supports the audio transmission protocol. The external device can transmit the audio data to the power amplifier 20 through the wireless communication conversion module 70, thereby controlling the speaker 30 to play music. The convenience of using the vehicle-mounted audio playback device 100 is achieved, and the external device can capture, debug, and process the audio, and the power amplifier 20 can control the speaker 30 to play the audio signal sent by the external device in real time.

[0030] In another embodiment, the wireless communication conversion module 70 includes a control information output interface, and the audio output interface is connected to the audio input interface of the power amplifier 20 by wired communication. The input interface of the wireless communication conversion module 70 is used to wirelessly connect to an external device to send the control information received from the external device to the power amplifier 20. The power amplifier 20 is controlled to drive the speaker 30 to play audio. The power amplifier 20 is used to amplify and output audio. The power amplifier 20 includes a variety of audio amplification output modules such as CLASS AB (class AB amplifier) ​​and CLASS D (class D amplifier), which enriches the functions of the power amplifier 20. In a specific embodiment, the power amplifier 20 includes one or more diagnostic chips of DC, AC, load short circuit, output short circuit to power supply, output short circuit to ground, overcurrent detection, and overvoltage monitoring. The diagnostic chip performs real-time detection to ensure the safe and stable operation of the power amplifier 20.

[0031] In another embodiment, the output interface of the wireless communication conversion module 70 includes an audio data interface and a control information output interface, and the audio output interface is connected to the audio input interface of the power amplifier 20 by wired communication. The input interface of the wireless communication conversion module 70 is used to wirelessly connect with an external device to send the audio data and control information received from the external device to the power amplifier 20. Control the power amplifier 20 to play audio. In a specific embodiment, the wireless communication conversion module 70 includes a WiFi chip, which is used to convert WiFi signals and audio signals such as TDM signals. The wireless communication conversion module 70 is wirelessly connected to the external device through the WiFi antenna interface. The external device can be matched with the WiFi antenna interface to achieve wireless connection with the vehicle-mounted audio playback device 100, thereby achieving the capture and analysis of audio signals on an external device such as a computer or a mobile phone.

[0032] In one embodiment, the vehicle audio playback device 100 includes an audio transfer module 10, and the audio transfer module 10 includes an audio input interface and a control information input interface. The audio input interface of the audio transfer module 10 is used to connect to the vehicle system in the vehicle. The control information input interface of the audio transfer module 10 is used to connect to the vehicle system to receive a control signal, and the audio transfer module 10 includes an output interface connected to the power amplifier 20. The power amplifier 20 interacts with the vehicle system through the audio transfer module 10, and the audio input interface of the audio transfer module 10 is used to receive audio information of the vehicle system. In one embodiment, the audio input interface of the audio transfer module 10 includes an audio data interface in at least one format, such as I2S, TDM, and PDM. The control information input interface of the audio transfer module 10 is used to receive control information of the vehicle system, and the output interface of the audio transfer module 10 is connected to the power amplifier 20 for transmitting the control information and / or audio data of the vehicle system to the power amplifier 20. In some embodiments, the output interface of the audio transfer module 10 includes an audio output interface and / or a control information output interface. The audio output interface of the audio transfer module 10 is used to transmit the audio data of the vehicle system to the power amplifier 20, and the control information output interface of the audio transfer module 10 is used to transmit the control information of the vehicle system to the power amplifier 20, so that the vehicle controls the power amplifier 20 to play audio.

[0033] The vehicle system and the audio transfer module 10 can be connected by wire or by wireless connection. In a specific embodiment, the audio transfer module 10 includes an A2B chip, and the audio transfer module 10 communicates with the vehicle system through the A2B protocol. Specifically, the audio transfer module 10 transmits audio data and control information to the vehicle system. The A2B chip uses a high-bandwidth bidirectional digital audio bus to realize the transmission of audio data. The format of the audio data can support I2S, TDM and PDM, etc., and the control information can use I2C signals. For example, in actual operation, a twisted pair can be used to transmit audio data, control information, clock and power supply signals, and the wiring is simple and convenient.

[0034] In one embodiment, the control information output interface of the wireless communication conversion module 70 is connected to the control information input interface of the audio transfer module 10 so that the audio transfer module 10 stops sending audio data and / or control information to the power amplifier 20 after receiving the stop working instruction sent by the wireless communication conversion module 70. The control information output interface of the wireless communication conversion module 70 is used to send control information to the control information of the audio transfer module 10, and the control information may include a stop working instruction. In a specific embodiment, the stop working instruction may include a stop audio data output instruction, a stop control information output instruction, and a stop all data output instruction. For example, after receiving the stop audio output instruction sent by the wireless communication conversion module 70, the audio transfer module 10 stops sending audio data to the power amplifier 20. Alternatively, after receiving the stop control information output instruction sent by the wireless communication conversion module 70, the audio transfer module 10 stops sending control information to the power amplifier 20. Alternatively, after receiving the stop all data output instruction sent by the wireless communication conversion module 70, the audio transfer module 10 stops sending all data information including audio data and control information to the power amplifier 20.

[0035] In a specific embodiment, the wireless communication conversion module 70 includes a WiFi chip, the audio transfer module 10 includes an A2B chip, and the control information output interface of the WiFi chip is connected to the control information output interface of the A2B chip. After the mobile phone is wirelessly connected to the antenna interface of the WiFi chip, the WiFi chip sends an I2C signal indicating an instruction to stop all data output to the audio transfer module 10 through the control information output interface. After receiving the I2C signal, the A2B chip stops sending all data information including audio data and control information to the power amplifier 20.

[0036] In another specific embodiment, the wireless communication conversion module 70 includes a Bluetooth chip, the audio transfer module 10 includes an A2B chip, and the control information output interface of the Bluetooth chip is connected to the control information output interface of the A2B chip. After the mobile phone is wirelessly connected to the Bluetooth chip, the Bluetooth chip sends an I2C signal indicating an instruction to stop all data output to the audio transfer module 10 through the control information output interface. After receiving the I2C signal, the A2B chip stops sending all data information including audio data and control information to the power amplifier 20.

[0037] In one embodiment, the vehicle audio playback device 100 includes a monitoring module 40, and the detection end of the monitoring module 40 is connected to the power amplifier 20. The monitoring module 40 is used to detect the power amplifier 20 and generate a detection result. The monitoring module 40 is respectively connected to the wireless communication conversion module 70 and the audio transfer module 10 to send the detection result of the power amplifier 20 to the wireless communication conversion module 70 and / or the audio transfer module 10. So that the wireless communication conversion module 70 and / or the audio conversion module receive the abnormal detection result and turn off the power amplifier 20 in time. The monitoring module 40 is connected to the wireless communication conversion module 70 and the audio transfer module 10 for transmitting control signals and detection results. Among them, the control signal can be transmitted using an I2C signal. In some embodiments, the monitoring module 40 detects the input voltage and temperature parameters of the power amplifier 20 to prevent damage to the device under unsuitable working conditions. If an abnormal detection result is generated, it is fed back to the wireless communication conversion module and / or the audio transfer module 10 in time to turn off the power amplifier 20 for protection. In some specific embodiments, the monitoring module 40 detects an abnormal detection result, and the audio data input source of the current power amplifier 20 is the audio output end of the audio relay module 10. The monitoring module 40 sends the abnormal detection result to the audio relay module 10. The audio relay module 10 can send the abnormal detection result to the vehicle system through a communication connection with the vehicle system, and can generate control information through the vehicle system to control the power amplifier 20 to shut down through the audio relay module 10, thereby protecting the system.

[0038] In one embodiment, the vehicle-mounted audio playback device 100 includes a power supply module 50, and the power supply module 50 includes a power input interface and a power output interface. The power input interface is used to connect the power supply device in the vehicle, and the power output interface is respectively connected to the wireless communication conversion module 70 and the audio transfer module 10. The power supply device in the vehicle can be a vehicle battery, or a vehicle system, etc., which is not limited in this application. The power output interface provides working voltage for the wireless communication conversion module 70 and the audio transfer module 10. In some embodiments, the power output interface is also connected to the monitoring module 40 to provide a power supply voltage for the monitoring module 40. It can be understood that the power supply voltages required by the wireless communication conversion module 70, the audio transfer module 10 and the monitoring module 40 may be different, and the power supply voltages provided by the power supply module 50 to the wireless communication conversion module 70, the audio transfer module 10 and the monitoring module 40 may be different.

[0039] Specifically, the power supply module 50 includes a boost circuit, a first buck circuit and a second buck circuit, and the input end of the boost circuit and the input end of the first buck circuit are both used to connect to the power input interface; the power output interface includes a boost output interface, a first buck output interface and a second buck output interface, the output end of the boost circuit is connected to the boost output interface, and the boost output interface provides a working voltage for the power amplifier module; the output end of the first buck circuit is connected to the first buck output interface, the input end of the second buck circuit is connected to the first buck output interface, and the second buck output interface provides a working voltage for the audio transfer module 10; the output end of the second buck circuit is connected to the second buck output interface, and the second buck output interface provides a working voltage for at least one of the wireless communication conversion module 70 and the monitoring module 40. The boost circuit boosts the input voltage of the power output interface to generate a first boost voltage for the power amplifier module to work. The first buck circuit bucks the input voltage of the power output interface to generate a first buck voltage for the audio transfer module 10 to work. The second step-down circuit steps down the first step-down voltage to provide the wireless communication conversion module 70 and the monitoring module 40 with working.

[0040] In a specific embodiment, the boost circuit may be a BOOST circuit 51, and the buck circuit may be a BUCK circuit 53 or an LDO circuit 52, which may be configured according to the power supply requirements of the corresponding connection module. Figure 2 , Figure 2 It is a schematic diagram of the power supply module structure of an embodiment of the vehicle audio playback device 100 of the present application. The power input interface of the power supply module 50 is connected to the vehicle battery. The power supply module 50 is composed of a BOOST circuit 51, a BUCK circuit 53 and an LDO circuit 52. The input end of the BOOST circuit 51 is connected to the vehicle battery. The BOOST circuit 51 boosts the vehicle battery voltage to 24V and outputs it to the power amplifier module for power supply. The input end of the BUCK circuit 53 is connected to the vehicle battery. The BUCK circuit 53 steps down the vehicle battery voltage to 8.5V to power the audio transfer module 10. The input end of the LDO circuit 52 is connected to the output end of the BUCK circuit 53, and the 8.5V voltage is reduced to 3.3 to power the wireless communication conversion module 70 and the monitoring module 40.

[0041] In one embodiment, the in-vehicle audio playback device 100 includes a switch module 60, the input end of the switch module 60 is used to be connected to an external power source, and the output end of the switch module 60 is connected to the power supply module 50, for enabling control of the power supply module 50. In some embodiments, the switch module 60 includes a power conversion module, one end of the power conversion module is connected to the ACC level signal, and the other end of the power conversion module is connected to the power supply module 50. The power conversion module converts the external ACC level signal to make it suitable for the power amplifier 20, thereby preventing the power amplifier 20 from being damaged.

[0042] The power amplifier 20 provided in this application can include at least the following two usage scenarios:

[0043] The first usage scenario: the power supply module 50 is connected to the vehicle battery, and the switch module 60 controls the power supply module 50 to power on. The vehicle system sends a control signal to the A2B chip, and after receiving the control signal, the A2B chip initializes the power amplifier 20. After the initialization is completed, the A2B chip transmits audio data to the power amplifier 20 through TDM communication, and the power amplifier 20 outputs the audio data and plays it through the speaker 30. After the WiFi chip is connected to the mobile phone, the WiFi chip sends a control signal to the A2B chip, and the A2B chip stops transmitting audio data to the power amplifier 20. The WiFi chip receives the audio data wirelessly transmitted by the mobile phone, and transmits the audio data to the power amplifier 20 through TDM communication. The power amplifier 20 outputs the audio data to the speaker 30 for playback.

[0044] The second usage scenario: the switch module 60 controls the power supply module 50 to power on, the WiFi chip is connected to the mobile phone, the WiFi chip sends a control signal to initialize the power amplifier 20, the WiFi chip receives the audio data wirelessly transmitted by the mobile phone, and transmits the audio data to the power amplifier 20 through TDM communication, and the power amplifier 20 outputs the audio data to the speaker 30 for playback.

[0045] The vehicle-mounted audio playback device 100 in the above scheme is wirelessly connected to an external device through the input interface of the wireless communication conversion module 70, the external device communicates with the wireless communication conversion module 70 through wireless signals, and the wireless communication conversion module 70 is connected to the audio input interface of the power amplifier 20 through wired communication, so that the wireless communication conversion module 70 transmits the wireless signal transmitted by the external device to the power amplifier 20 by wire, thereby enabling the external device to control the operation of the power amplifier 20 through wireless communication, thereby meeting the convenient and personalized needs of using the vehicle-mounted audio playback device 100.

[0046] Please also see Figure 3 , Figure 3 It is a structural schematic diagram of an embodiment of the vehicle audio system of the present application. The vehicle audio system 1 includes a vehicle audio playback device 100 of any of the above embodiments. The vehicle audio playback device is wirelessly connected to an external device through an input interface of a wireless communication conversion module 70, and the external device communicates with the wireless communication conversion module 70 through wireless signals. The wireless communication conversion module 70 is connected to the audio input interface of the power amplifier 20 through wired communication, so that the wireless communication conversion module 70 transmits the wireless signal transmitted by the external device to the power amplifier 20 through wired transmission, thereby realizing that the external device controls the power amplifier 20 to work through wireless communication, and meeting the convenient and personalized needs of the vehicle audio playback device.

[0047] Please also see Figure 4 , Figure 4 1 is a schematic diagram of the structure of a vehicle according to an embodiment of the present application. The vehicle 2 includes the vehicle audio system 1. The vehicle audio system 1 includes the vehicle audio playback device 100 according to any of the above embodiments.

[0048] In the above scheme, the vehicle-mounted audio playback device adopted in this application is wirelessly connected to the external device through the input interface of the wireless communication conversion module 70, the external device communicates with the wireless communication conversion module 70 through wireless signals, and the wireless communication conversion module 70 is connected to the audio input interface of the power amplifier 20 through wired communication, so that the wireless communication conversion module 70 transmits the wireless signal transmitted by the external device to the power amplifier 20 by wire, thereby realizing that the external device controls the operation of the power amplifier 20 through wireless communication, thereby meeting the convenient and personalized needs of using the vehicle-mounted audio playback device.

[0049] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A vehicle-mounted audio player, characterized in that: include: speaker; A power amplifier, wherein an output interface of the power amplifier is connected to the speaker; A wireless communication conversion module, wherein an output interface of the wireless communication conversion module is connected to the audio input interface of the power amplifier by wired communication, and the output interface of the wireless communication conversion module includes a control information output interface; The input interface of the wireless communication conversion module is used for wireless communication connection with an external device so as to send control information received from the external device to the power amplifier.

2. The vehicle-mounted audio player according to claim 1, characterized in that: The output interface of the wireless communication conversion module also includes an audio output interface, and the input interface of the wireless communication conversion module is also used to wirelessly connect to an external device to send audio data received from the external device to the power amplifier.

3. The vehicle-mounted audio player according to claim 1, characterized in that: The vehicle-mounted audio playback device includes an audio transfer module, the audio transfer module includes an audio input interface and a control information input interface, the audio input interface of the audio transfer module is used to connect to a vehicle system in the vehicle, the control information input interface of the audio transfer module is used to connect to the vehicle system to receive a control signal, the audio transfer module includes an output interface connected to the power amplifier, and the output interface of the audio transfer module includes an audio output interface and / or a control information output interface; The control information output interface of the wireless communication conversion module is connected to the control information input interface of the audio transfer module so that the audio transfer module stops sending audio data and / or control information to the power amplifier after receiving the stop working instruction sent by the wireless communication conversion module.

4. The vehicle-mounted audio player according to claim 3, characterized in that: The audio transfer module includes an A2B chip, and / or the wireless communication conversion module includes a WiFi chip.

5. The vehicle-mounted audio player according to claim 3, characterized in that: The audio input interface of the audio transfer module includes an audio data interface in at least one format.

6. The vehicle-mounted audio player according to any one of claims 3 to 5, characterized in that: The vehicle-mounted audio playback device includes a monitoring module, the detection end of the monitoring module is connected to the power amplifier, and the monitoring module is respectively communicated with the wireless communication conversion module and the audio transfer module to send the detection result of the power amplifier to the wireless communication conversion module and / or the audio transfer module.

7. The vehicle-mounted audio player according to any one of claims 3 to 5, characterized in that: The device includes a power supply module, which includes a power input interface and a power output interface. The power input interface is used to connect to a power supply device in a vehicle, and the power output interface is respectively connected to the wireless communication conversion module and the audio transfer module.

8. The vehicle-mounted audio player according to claim 7, characterized in that: The power supply module includes a boost circuit, a first buck circuit and a second buck circuit, the input end of the boost circuit and the input end of the first buck circuit are both used to connect to the power input interface; the power output interface includes a boost output interface, a first buck output interface and a second buck output interface, the output end of the boost circuit is connected to the boost output interface, and the boost output interface provides a working voltage for the power amplification module; the output end of the first buck circuit is connected to the first buck output interface, the input end of the second buck circuit is connected to the first buck output interface, and the second buck output interface provides a working voltage for the audio transfer module; the output end of the second buck circuit is connected to the second buck output interface, and the second buck output interface provides a working voltage for at least one of the wireless communication conversion module and the monitoring module.

9. The vehicle-mounted audio player according to claim 8, characterized in that: The vehicle-mounted audio playback device comprises a switch module, an input end of the switch module is used to be connected to an external power supply, and an output end of the switch module is connected to the power supply module for enabling control of the power supply module.

10. A car audio system, characterized in that: The vehicle audio system includes the vehicle audio playback device as described in any one of claims 1-9.

11. A vehicle, characterized in that: The vehicle includes the vehicle audio system according to claim 10 .

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