Vehicle-mounted entertainment system and automobile

Abstract

The utility model discloses a vehicle-mounted entertainment system and an automobile, and belongs to the technical field of vehicles, the system comprises an audio input interface (AUX), an audio processing chip (DSP), an operational amplifier chip, a power amplifier chip, a loudspeaker, a Bluetooth antenna, a Bluetooth chip, a miniature coaxial connector (IPEX) and a microcontroller (MCU), the output end of the audio input interface (AUX) is connected with the input end of the audio processing chip (DSP); the output end of the audio processing chip (DSP) is connected with the input end of the operational amplifier chip; the output end of the operational amplifier chip is connected with the input end of the power amplifier chip; the output end of the power amplifier chip is connected with the input end of the loudspeaker; the Bluetooth antenna is connected with the Bluetooth chip through a miniature coaxial connector (IPEX); and the Bluetooth chip is connected with the audio processing chip (DSP). According to the technical scheme of the utility model, the music or audio playing effect of the vehicle-mounted entertainment system can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicles, and specifically relates to a vehicle-mounted entertainment system and a vehicle. Background Art

[0002] Current passenger car in-car entertainment systems offer complex functions, but in reality, they are primarily used by users for listening to music and audio, with other functions rarely used. Listening to the radio and music via FM radio is limited by the broadcast signal. Many areas with poor signal quality result in poor FM playback and excessive noise. Playing music via USB requires downloading to a USB drive first, which is a hassle if you frequently update your playlist and need to frequently unplug the USB drive. Online music is better than FM radio, but it requires the in-car entertainment system's data plan. Furthermore, configuring these features can increase the cost of the in-car entertainment system.

[0003] Patent CN116405068A discloses an in-vehicle entertainment system, a vehicle, a Bluetooth audio transmission method, and a storage medium. The system includes a Bluetooth antenna and a playback component; a Bluetooth module, which has a Bluetooth audio signal decoding function and is used to receive the Bluetooth audio signal through the Bluetooth antenna and decode the Bluetooth audio signal through the decoding function to obtain a decoded audio signal; a digital signal processor is used to transmit the decoded audio signal to the playback component and use the audio signal to drive the playback component to play the audio.

[0004] However, the technology disclosed in the above patent cannot improve the effect of playing music or audio by the in-vehicle entertainment system. Utility Model Content

[0005] The technical problem to be solved by the present invention is to provide a car entertainment system and a car in view of the deficiencies in the existing technology, so as to achieve the purpose of improving the effect of playing music or audio by the car entertainment system.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] The utility model provides an in-vehicle entertainment system, comprising an audio input interface (AUX), an audio processing chip (DSP), an operational amplifier chip, a power amplifier chip, a speaker, a Bluetooth antenna, a Bluetooth chip, a micro coaxial connector (IPEX) and a microcontroller (MCU), wherein the output end of the audio input interface (AUX) is connected to the input end of the audio processing chip (DSP); the output end of the audio processing chip (DSP) is connected to the input end of the operational amplifier chip; the output end of the operational amplifier chip is connected to the input end of the power amplifier chip; the output end of the power amplifier chip is connected to the input end of the speaker; the Bluetooth antenna is connected to the Bluetooth chip via the micro coaxial connector (IPEX); the Bluetooth chip is connected to the audio processing chip (DSP); and the microcontroller (MCU) is connected to the audio processing chip (DSP), the power amplifier chip and the Bluetooth chip respectively.

[0008] Furthermore, the system also includes a controller area network bus transceiver, a display screen driver chip and a display screen, wherein the controller area network bus transceiver is connected to the microcontroller (MCU); the display screen driver chip is connected to the microcontroller (MCU); and the display screen is connected to the display screen driver chip.

[0009] Furthermore, an audio input interface (AUX), an audio processing chip (DSP), an operational amplifier chip, a power amplifier chip, a Bluetooth chip, a micro coaxial connector (IPEX) and a microcontroller (MCU) are integrated on the same printed circuit board (PCB).

[0010] Furthermore, the controller area network bus transceiver and the display screen driver chip are also integrated on a printed circuit board (PCB).

[0011] Furthermore, the Bluetooth antenna is installed on the back of the operation panel of the in-vehicle entertainment system.

[0012] Furthermore, the audio input interface (AUX) receives an analog audio signal and transmits the received analog audio signal to the audio processing chip (DSP); the audio processing chip (DSP) processes the received analog audio signal and transmits the processed analog audio signal to the operational amplifier chip.

[0013] Furthermore, the Bluetooth chip receives audio data and converts the received audio data into a digital audio signal, and transmits the digital audio signal to the audio processing chip (DSP); the audio processing chip (DSP) converts the received digital audio signal into an analog audio signal, and transmits the analog audio signal to the op amp chip.

[0014] Furthermore, the operational amplifier chip performs noise reduction processing on the received analog audio signal, and transmits the analog audio signal after noise reduction processing to the power amplifier chip; the power amplifier chip amplifies the analog audio signal after noise reduction processing, and transmits the analog audio signal after amplification processing to the speaker.

[0015] The utility model also provides a car, which is equipped with the above-mentioned in-car entertainment system.

[0016] The utility model has the following advantages:

[0017] (1) The technical solution of the present invention can improve the effect of playing music or audio by the in-vehicle entertainment system.

[0018] (2) The system of the present invention only includes audio input through the Bluetooth antenna and audio input through the audio input interface (AUX). There is no situation where the audio signal is affected by the strength of the regional signal, and there is no external power amplifier chip, which can effectively reduce costs.

[0019] (3) The audio input interface (AUX) in the system of the utility model is integrated on the printed circuit board (PCB) of the in-vehicle entertainment system. The audio wiring is very short, the anti-electromagnetic interference capability is strong, and the audio playback effect is better.

[0020] (4) The Bluetooth antenna in the present invention is installed on the back of the operating panel of the in-vehicle entertainment system, so that the Bluetooth antenna can be kept away from interference from components on the printed circuit board (PCB). The Bluetooth antenna has good directional directivity, strong anti-interference ability, and better audio playback effect.

[0021] (5) In the system of the present invention, from receiving the analog audio signal through the audio input interface (AUX) to transmitting the analog audio signal to the speaker, no AD converter and DA converter are used in the process, thereby making the analog audio signal transmission lossless. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] This manual includes the following drawings, which show the following contents:

[0023] Figure 1 This is a logic structure diagram of a vehicle entertainment system of the utility model;

[0024] Figure 2 This is a hardware schematic diagram of a vehicle entertainment system of the present utility model;

[0025] Figure 3 It is a schematic diagram of an in-vehicle entertainment system of the present invention.

[0026] Explanation of the accompanying symbols: 1. Audio input interface (AUX); 2. Audio processing chip (DSP); 3. Operational amplifier chip; 4. Power amplifier chip; 5. Speaker; 6. Bluetooth antenna; 7. Bluetooth chip; 8. Micro coaxial connector (IPEX); 9. Microcontroller (MCU); 10. Controller area network bus transceiver; 11. Display driver chip; 12. Display; 13. AUX button; 14. Bluetooth button; 15. Previous song button; 16. Next song button; 17. Pause button; 18. Volume knob. DETAILED DESCRIPTION

[0027] The following is a further detailed description of the specific implementation methods of the present invention by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of the present invention and to facilitate its implementation.

[0028] Figure 1 This is a logical block diagram of an in-vehicle entertainment system according to the present invention, comprising an audio input interface (AUX) 1, an audio processing chip (DSP) 2, an op amp chip 3, a power amplifier chip 4, a speaker 5, a Bluetooth antenna 6, a Bluetooth chip 7, a micro coaxial connector (IPEX) 8, and a microcontroller (MCU) 9. The output of the audio input interface (AUX) 1 is connected to the input of the audio processing chip (DSP) 2; the output of the audio processing chip (DSP) 2 is connected to the input of the op amp chip 3; the output of the op amp chip 3 is connected to the input of the power amplifier chip 4; the output of the power amplifier chip 4 is connected to the input of the speaker 5; the Bluetooth antenna 6 is connected to the Bluetooth chip 7 via the micro coaxial connector (IPEX) 8; the Bluetooth chip 7 is connected to the audio processing chip (DSP) 2; and the microcontroller (MCU) 9 is connected to the audio processing chip (DSP) 2, the power amplifier chip 4, and the Bluetooth chip 7, respectively. Furthermore, the display screen 12 is an LCD intermittent screen; and the Bluetooth antenna 6 is connected to the micro coaxial connector (IPEX) 8 via a coaxial cable.

[0029] Figure 1 The system also includes a controller area network bus transceiver 10, a display driver chip 11, and a display screen 12. The controller area network bus transceiver 10 is connected to the microcontroller (MCU) 9; the display driver chip 11 is connected to the microcontroller (MCU) 9; and the display screen 12 is connected to the display driver chip 11. Furthermore, the system of the present invention receives CAN signals via the controller area network bus transceiver 10 and converts the received CAN signals into TXD and RXD signals, and then transmits the TXD and RXD signals to the microcontroller (MCU) 9, thereby enabling communication with other vehicle components.

[0030] Figure 1The audio input interface (AUX) 1, audio processing chip (DSP) 2, operational amplifier chip 3, power amplifier chip 4, Bluetooth chip 7, micro coaxial connector (IPEX) 8 and microcontroller (MCU) 9 are integrated on the same printed circuit board (PCB); the controller local area network bus transceiver 10 and the display driver chip 11 are also integrated on the above-mentioned printed circuit board (PCB); and the above-mentioned printed circuit board (PCB) is the mainboard of the in-vehicle entertainment system.

[0031] Figure 2 This is a hardware schematic diagram of a car entertainment system of the utility model. Figure 2 The working principle of the system of the present invention is introduced. The audio input of the present invention is divided into two parts, namely the audio input through the Bluetooth antenna 6 and the audio input through the audio input interface (AUX) 1.

[0032] After the Bluetooth antenna 6 of the in-vehicle entertainment system is connected to the Bluetooth of the mobile phone, the audio data is transmitted to the Bluetooth chip 7 through the Bluetooth of the mobile phone and the Bluetooth antenna 6 via the coaxial cable and the micro coaxial connector (IPEX) 8; the Bluetooth chip 7 receives the audio data and converts the received audio data into a digital audio signal (I2S / PCM audio signal), and transmits the digital audio signal (I2S / PCM audio signal) to the audio processing chip (DSP) 2; the audio processing chip (DSP) 2 converts the received digital audio signal (I2S / PCM audio signal) into an analog audio signal, and transmits the analog audio signal to the operational amplifier chip 3; the operational amplifier chip 3 performs noise reduction processing on the received analog audio signal, and transmits the analog audio signal after noise reduction processing to the power amplifier chip 4; the power amplifier chip 4 amplifies the analog audio signal after noise reduction processing, and transmits the amplified analog audio signal to the speaker 5, thereby realizing the playback of the audio input through the Bluetooth antenna 6. Because the Bluetooth antenna 6 in the system of the present invention is not a board-mounted antenna, but is connected to the Bluetooth antenna 6 by welding a micro coaxial connector (IPEX) 8 on a printed circuit board (PCB), and then the micro coaxial connector (IPEX) 8 is connected to the Bluetooth antenna 6 through a coaxial line, and the Bluetooth antenna 6 is installed on the operation panel of the in-vehicle entertainment system (see Figure 3 ), so that the Bluetooth antenna 6 can be kept away from interference from components on the printed circuit board (PCB), the Bluetooth antenna 6 has good directionality, strong anti-interference ability, and better audio playback effect.

[0033] After the audio input interface (AUX) 1 is connected to a mobile phone or MP3 via a 3.5mm audio cable, an analog audio signal is received through the audio input interface (AUX) 1 and the received analog audio signal is transmitted to the audio processing chip (DSP) 2; wherein, before the analog audio signal is transmitted from the audio input interface (AUX) 1 to the audio processing chip (DSP) 2, the analog audio (left / right channel) signal played by the mobile phone or MP3 needs to be filtered by a filtering circuit; then the received analog audio signal is processed by the audio processing chip (DSP) 2, and the processed analog audio signal is transmitted to the operational amplifier chip 3; the operational amplifier chip 3 performs noise reduction processing on the received analog audio signal, and transmits the analog audio signal after noise reduction processing to the power amplifier chip 4; the power amplifier chip 4 amplifies the analog audio signal after noise reduction processing, and transmits the amplified analog audio signal to the speaker 5, thereby realizing the playback of the audio input through the audio input interface (AUX) 1. Because the output end of the audio input interface (AUX) 1 is on the printed circuit board (PCB), that is, on the mainboard of the in-car entertainment system, the audio trace is very short, the anti-electromagnetic interference ability is strong, and the audio playback effect is better.

[0034] Among them, the above-mentioned filtering circuit adopts the existing traditional filtering circuit; in addition, the microcontroller (MCU) 9 communicates with the display driver chip 11 through the I2C protocol; the microcontroller (MCU) 9 communicates with the power amplifier chip 12 through the I2C protocol; the microcontroller (MCU) 9 communicates with the audio processing chip (DSP) 2 through the SPI / I2C protocol (SPI or I2C protocol); the microcontroller (MCU) 9 communicates with the Bluetooth chip 7 through the I2C / UART protocol (I2C or UART protocol).

[0035] Figure 3 This is a schematic diagram of a vehicle entertainment system of the present invention. Figure 3 As can be seen in the figure, the operation panel of the in-car entertainment system has an input port of the audio input interface (AUX) 1, a display screen 12, an AUX button 13, a Bluetooth button 14, a previous song button 15, a next song button 16, a pause button 17, and a volume knob 18. There is a Bluetooth antenna 6 on the back of the operation panel of the in-car entertainment system. Among them, the previous song button 15 can be used to switch to the previous song, the next song button 16 can be used to switch to the next song, the pause button 17 can be used to pause the playback function, and the volume knob 18 can be used to increase or decrease the volume.

[0036] In addition, the utility model also provides a car, which is equipped with the above-mentioned in-car entertainment system.

[0037] The above description of the present invention is provided as an example, in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described method. Any non-substantial improvements made using the method concepts and technical solutions of the present invention, or any application of the above-described concepts and technical solutions of the present invention to other situations without modification, are all within the scope of protection of the present invention.

Claims

1. An in-vehicle entertainment system, characterized by: The system comprises an audio input interface (AUX), an audio processing chip (DSP), an operational amplifier chip, a power amplifier chip, a speaker, a Bluetooth antenna, a Bluetooth chip, a micro coaxial connector (IPEX) and a microcontroller (MCU). The output end of the audio input interface (AUX) is connected to the input end of the audio processing chip (DSP); the output end of the audio processing chip (DSP) is connected to the input end of the operational amplifier chip; the output end of the operational amplifier chip is connected to the input end of the power amplifier chip; the output end of the power amplifier chip is connected to the input end of the speaker; the Bluetooth antenna is connected to the Bluetooth chip via the micro coaxial connector (IPEX); the Bluetooth chip is connected to the audio processing chip (DSP); and the microcontroller (MCU) is respectively connected to the audio processing chip (DSP), the power amplifier chip and the Bluetooth chip.

2. The in-vehicle entertainment system according to claim 1, wherein: The system also includes a controller area network bus transceiver, a display screen driver chip and a display screen. The controller area network bus transceiver is connected to the microcontroller (MCU); the display screen driver chip is connected to the microcontroller (MCU); and the display screen is connected to the display screen driver chip.

3. The in-vehicle entertainment system according to claim 1, wherein: The audio input interface (AUX), audio processing chip (DSP), operational amplifier chip, power amplifier chip, Bluetooth chip, micro coaxial connector (IPEX) and microcontroller (MCU) are integrated on the same printed circuit board (PCB).

4. The in-vehicle entertainment system according to claim 3, wherein: The controller area network bus transceiver and display screen driver chip are also integrated on the printed circuit board (PCB).

5. The in-vehicle entertainment system according to claim 1, wherein: The Bluetooth antenna is installed on the back of the operation panel of the in-vehicle entertainment system.

6. The in-vehicle entertainment system according to claim 1, wherein: The audio input interface (AUX) receives an analog audio signal and transmits the received analog audio signal to the audio processing chip (DSP); the audio processing chip (DSP) processes the received analog audio signal and transmits the processed analog audio signal to the operational amplifier chip.

7. The in-vehicle entertainment system according to claim 1, wherein: The Bluetooth chip receives audio data and converts the received audio data into a digital audio signal, and transmits the digital audio signal to the audio processing chip (DSP); the audio processing chip (DSP) converts the received digital audio signal into an analog audio signal, and transmits the analog audio signal to the operational amplifier chip.

8. The in-vehicle entertainment system according to any one of claims 6 to 7, characterized in that: The operational amplifier chip performs noise reduction processing on the received analog audio signal and transmits the analog audio signal after noise reduction processing to the power amplifier chip; the power amplifier chip amplifies the analog audio signal after noise reduction processing and transmits the analog audio signal after amplification processing to the speaker.

9. An automobile, characterized in that: The car is equipped with the in-car entertainment system according to any one of claims 1 to 8.

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