Novel vehicle-mounted back row entertainment system integrated plate

Abstract

The embodiment of the utility model discloses a novel vehicle-mounted back-row entertainment system integrated board which comprises a circuit board. An Android system core board module circuit, an MCU, a digital audio processing circuit, a dual four-way audio analog switch circuit, a dual-track digital power amplifier circuit, a Bluetooth chip circuit, a wireless microphone receiving chip circuit, a radio chip circuit, an HDMI to MIPI chip circuit, an audio U-segment transmitting circuit, an audio Bluetooth transmitting module circuit and a power management circuit are integrated on the circuit board. A capacitive screen and an MIPI display screen. Compared with a traditional vehicle-mounted navigation system, the vehicle-mounted navigation system has the advantages that the audio U-band transmitting circuit and the audio Bluetooth transmitting module circuit which are better in tone quality are added, high-definition audio and video external equipment input, a double-wireless-microphone karaoke system and the like are supported, and passengers on the back row can experience more practical functions of high-tech products; the system is high in integration level, has multiple functions, and is beneficial to secondary development and large-scale popularization.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile navigation multimedia, in particular to a novel integrated board for a rear-seat entertainment system on a vehicle. Background Art

[0002] An increasing number of cars are now equipped with in-car entertainment systems, not just for the front seats but also for the rear seats. The front center console primarily provides navigation and a reverse camera, while the rear entertainment system can connect to video devices and headphones, allowing passengers to surf the internet, work, watch movies, and even perform karaoke, adding a touch of fun to long journeys.

[0003] The existing integrated boards for in-vehicle rear-seat entertainment systems have low integration and few functions, and are not conducive to secondary development and large-scale promotion. Utility Model Content

[0004] The technical problem to be solved by the embodiments of the present invention is to provide a new integrated board for a rear-seat entertainment system in a vehicle to improve the integration level.

[0005] In order to solve the above technical problems, an embodiment of the present utility model proposes a new type of vehicle rear entertainment system integrated board, including a circuit board, an Android system core board module circuit is integrated on the circuit board, and the circuit board is also integrated with an MCU, a digital audio processing circuit, a dual four-channel audio analog switch circuit, a two-channel digital power amplifier circuit, a Bluetooth chip circuit, a wireless microphone receiving chip circuit, a radio chip circuit, an HDMI to MIPI chip circuit, an audio U-segment transmitting circuit, an audio Bluetooth transmitting module circuit, a power management circuit, a capacitive screen, and a MIPI display. The wireless microphone receiving chip circuit, the radio chip circuit, the dual four-channel audio analog switch circuit, the digital audio processing circuit, and the power management circuit are electrically connected to the MCU, the Bluetooth chip circuit, the HDMI to MIPI chip circuit, the audio U-segment transmitting circuit, the audio Bluetooth transmitting module circuit, the power management circuit, the capacitive screen, and the MIPI display are electrically connected to the Android system core board module circuit, the digital audio processing circuit is electrically connected to the wireless microphone receiving chip circuit and the audio U-segment transmitting circuit, and the two-channel digital power amplifier circuit is electrically connected to the dual four-channel audio analog switch circuit.

[0006] Furthermore, it also includes a USB OTG device, which is electrically connected to the Android system core board module circuit.

[0007] Furthermore, it also includes a UART1 peripheral, which is electrically connected to the Android system core board module circuit.

[0008] Furthermore, it also includes a CAN plug-in box, which is electrically connected to the MCU.

[0009] Furthermore, a reset button is included, and the reset button is electrically connected to the MCU.

[0010] Furthermore, it also includes an ACC ILL port, which is electrically connected to the MCU.

[0011] Furthermore, it also includes a USB fast charging chip circuit, which is electrically connected to the Android system core board module circuit.

[0012] The beneficial effects of this utility model are as follows: it provides users with a convenient, simple, and stable all-in-one vehicle rear-seat entertainment system solution, saving users development costs. Compared with traditional vehicle navigation systems, this utility model adds a higher-quality audio U-band transmission circuit and an audio Bluetooth transmission module circuit, supports high-definition audio and video input from external devices, and a dual wireless microphone karaoke system, allowing rear passengers to experience the more practical functions of high-tech products. The high integration and multifunctionality of this utility model are conducive to secondary development and large-scale promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of a novel vehicle rear-seat entertainment system integrated board according to an embodiment of the present utility model.

[0014] Figure 2 It is a structural diagram of the audio part of an embodiment of the present utility model.

[0015] Figure 3 It is a circuit diagram of the Android system core board module circuit of an embodiment of the utility model.

[0016] Figure 4 It is a circuit diagram of the MCU of an embodiment of the present utility model.

[0017] Figure 5 This is a circuit diagram of a wireless microphone receiving chip circuit according to an embodiment of the present invention.

[0018] Figure 6 It is a circuit diagram of a digital audio processing circuit according to an embodiment of the present utility model.

[0019] Figure 7 It is a circuit diagram of a dual four-way audio analog switch circuit according to an embodiment of the present utility model.

[0020] Figure 8 It is a circuit diagram of a dual-channel digital power amplifier circuit according to an embodiment of the present utility model.

[0021] Figure 9 It is a circuit diagram of the Bluetooth chip circuit of an embodiment of the present utility model.

[0022] Figure 10It is a circuit diagram of the radio chip circuit of an embodiment of the utility model.

[0023] Figure 11 It is a circuit diagram of the HDMI to MIPI chip circuit according to an embodiment of the present invention.

[0024] Figure 12 It is a circuit diagram of an HDMI signal input circuit according to an embodiment of the present utility model.

[0025] Figure 13 It is a circuit diagram of the audio Bluetooth transmitter module circuit of an embodiment of the present utility model.

[0026] Figure 14 This is a circuit diagram of a USB fast charging chip circuit according to an embodiment of the present invention.

[0027] Figure 15 It is a circuit diagram of the MIPI display screen according to an embodiment of the present utility model.

[0028] Figure 16 1 is a circuit diagram of a power management circuit according to an embodiment of the present utility model. DETAILED DESCRIPTION

[0029] It should be noted that, unless there is a conflict, the embodiments in this application and the features described in the embodiments can be combined with each other. The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] In the embodiments of the present invention, if there are directional indications (such as up, down, left, right, front, back, etc.), they are only used to explain the relative position relationship and movement status of the various components under a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, in this utility model, the terms "first," "second," etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one of these features.

[0032] Please refer to Figures 1 to 16 The new vehicle rear entertainment system integrated board of the embodiment of the present utility model includes a circuit board.

[0033] The circuit board integrates the Android system core board module circuit, MCU, digital audio processing circuit, dual four-channel audio analog switch circuit, dual-channel digital power amplifier circuit, Bluetooth chip circuit, wireless microphone receiving chip circuit, radio chip circuit, HDMI to MIPI chip circuit, audio U-segment transmitting circuit, audio Bluetooth transmitting module circuit, power management circuit, capacitive screen, and MIPI display.

[0034] The wireless microphone receiving chip circuit, the radio chip circuit, the dual four-channel audio analog switch circuit, the digital audio processing circuit, and the power management circuit are electrically connected to the MCU (the MCU is preferably a 32-bit MCU); the Bluetooth chip circuit, the HDMI to MIPI chip circuit, the audio U-segment transmitting circuit, the audio Bluetooth transmitting module circuit, the power management circuit, the capacitive screen, and the MIPI display are electrically connected to the Android system core board module circuit; the digital audio processing circuit is electrically connected to the wireless microphone receiving chip circuit and the audio U-segment transmitting circuit; and the dual-channel digital power amplifier circuit is electrically connected to the dual four-channel audio analog switch circuit.

[0035] The power management circuit consists of 5V power supply, 3.8V power supply, DSP power supply, MCU power supply, etc. After the circuit board is powered on with 12V input, one path outputs 3V8 through the 12V to 3.8V circuit to provide the power supply voltage required by the Android system core board module circuit; another path outputs 5V through the 12V to 5V circuit to provide the power supply voltage required by each functional circuit module; the third path outputs 3V3 through the 12V to 3.3V circuit to provide the power supply voltage for the 32-bit MCU circuit; the 32-bit MCU (STM32_MCU) sends a boot command to each chip, and the main control CPU of the Android system core board module circuit reads the boot program from the eMMC memory, reads the CPU internal RAM to execute the boot program, and completes the initialization configuration of the memory during the execution of the boot program; after initialization is completed, the system in the eMMC memory is copied to the DDR memory, and the operating system is run in the DDR memory. During the running of the system, the initialization of other peripheral chips is completed. At this time, the external MIPI display screen displays the boot screen. When the operating system completes normal startup, the MIPI display screen displays normally and enters the operation interface. At this time, the capacitive touch screen can be used to operate the interface. Click the corresponding program icon to run the corresponding function.

[0036] Android system core board module circuit: 8-core CortexTM A55 processor, main frequency can reach 1.6GHz, GPU: PowerVR Fentale GE8322 up to 550MHz; display supports MIPI interface, up to FULL HD2160x1080 resolution, can be connected to 3 sets of USB peripherals, built-in WIFI 2.4G / 5G, 2.4G supports IEEE802.11b / g / n, 5G supports HT20 / HT40 / VHT20 / VHT40 / VHT80, and can support WIFI hotspot; built-in Bluetooth version 5.0, supports Bluetooth phone book, A2DP, as well as Bluetooth OBD, mouse, gamepad, keyboard and other external Bluetooth auxiliary devices.

[0037] The audio part of the present utility model is as follows Figure 2As shown in the figure, the audio U-band transmitting circuit adopts a monolithic U-band wireless audio transmitting chip, which can realize full integration from RF to baseband. The chip has low power consumption, high performance, and high integration. It operates in the 550MHz-960MHz frequency band and can realize intelligent frequency selection. When binding, the chip can avoid interference channels, thereby realizing high-quality communication channels. At the same time, the chip also adopts digital modulation and high-performance audio DAC, combined with extremely low-latency audio decoding, to realize digital audio transmission.

[0038] Digital audio processing (DSP) chip circuit: The circuit uses a single digital audio processing chip. This chip only requires simple peripheral circuits to easily implement all functions from audio data acquisition, audio algorithm processing to analog audio output. It has low power consumption and high performance, integrating an oscillator, a phase-locked loop (PLL), a programmable amplifier (PGA), an audio ADC, a digital signal processor (DSP), an audio DAC, a Class AB power amplifier, etc., and has a built-in 4M bito FLASH, allowing internal programs and algorithms to be modified through the UART serial port. The chip's built-in high-performance DSP is powerful and has multiple built-in algorithms. The system offers features such as Auto Tune, Pitch Shift, Howling Suppressing, Frequency Shift, Echo, Reverb, EQ, Dry / Wet output selection, Vocal Cut, Surround, Music Ducking, MP3 decoding and output, Dynamic Range Compression (DRC), Noise Gate, Mixer, and left / right channel signal swapping. Flash memory allows for further algorithm expansion and custom program creation. The Flash memory can also store various sound effects and notification tones, automatically preserving the sound effect configuration from the last shutdown.

[0039] Two-channel digital power amplifier circuit: Adopts a new type of uncoupled output and low-pass filter-free Class D stereo audio power amplifier chip. This chip has a short-circuit protection function. Once it detects an output-to-output or output-to-ground short circuit, the chip will automatically shut down immediately to avoid chip damage. If the short circuit is eliminated, the device will turn on again. Under the conditions of a 4 ohm load and a 5V power supply, it can provide 3W output power to directly drive the speaker, reducing the cost of this solution and the occupied PCB space.

[0040] The HDMI-to-MIPI chip circuit utilizes a high-performance single-chip HDMI 1.4-to-MIPI processor with one high-speed clock channel and four high-speed data channels. Each data channel supports a maximum operating speed of 1.5 Gbps and a maximum total bandwidth of 12 Gbps. The chip supports burst-mode DSI video data transmission and flexible video data mapping paths. The new in-vehicle rear-seat entertainment system integrated board also includes HDMI signal input circuitry.

[0041] The new in-vehicle rear entertainment system integrated board also includes a TFT backlight driver circuit, which is mainly composed of a boost circuit, a VGH & VGL generation circuit, a VCOM circuit, an LVDS display interface circuit, a MIPI interface, etc.; the TFT backlight driver circuit mainly outputs the various voltages required by the LCD display: negative voltage 8V2 (VGL), positive voltage 18V (VGH), 10V (AVDD), and 3V3-5V (CVOM).

[0042] As an implementation method, the new vehicle rear entertainment system integrated board also includes a USB OTG device, and the USB OTG device is electrically connected to the Android system core board module circuit.

[0043] As an implementation method, the new vehicle rear-seat entertainment system integrated board also includes a UART1 peripheral, and the UART1 peripheral is electrically connected to the Android system core board module circuit.

[0044] As an implementation method, the new vehicle rear entertainment system integrated board also includes a CAN plug-in box, which is electrically connected to the 32-bit MCU.

[0045] As an implementation method, the new vehicle rear entertainment system integrated board also includes a reset button, which is electrically connected to the 32-bit MCU.

[0046] As an implementation method, the new vehicle rear entertainment system integrated board further includes an ACC ILL port, which is electrically connected to the 32-bit MCU.

[0047] As an implementation method, the new vehicle rear entertainment system integrated board also includes a USB fast charging chip circuit, and the USB fast charging chip circuit is electrically connected to the Android system core board module circuit.

[0048] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A new type of integrated board for rear-seat entertainment system in a vehicle, including a circuit board, on which an Android system core board module circuit is integrated, characterized in that: The circuit board also integrates MCU, digital audio processing circuit, dual four-channel audio analog switch circuit, two-channel digital power amplifier circuit, Bluetooth chip circuit, wireless microphone receiving chip circuit, radio chip circuit, HDMI to MIPI chip circuit, audio U-segment transmitting circuit, audio Bluetooth transmitting module circuit, power management circuit, capacitive screen, MIPI display screen. The wireless microphone receiving chip circuit, radio chip circuit, dual four-channel audio analog switch circuit, digital audio processing circuit, and power management circuit are electrically connected to the MCU. The Bluetooth chip circuit, HDMI to MIPI chip circuit, audio U-segment transmitting circuit, audio Bluetooth transmitting module circuit, power management circuit, capacitive screen, and MIPI display screen are electrically connected to the Android system core board module circuit. The digital audio processing circuit is electrically connected to the wireless microphone receiving chip circuit and the audio U-segment transmitting circuit. The two-channel digital power amplifier circuit is electrically connected to the dual four-channel audio analog switch circuit.

2. The novel integrated board for the rear-seat entertainment system as claimed in claim 1, characterized in that: It also includes a USB OTG device, which is electrically connected to the Android system core board module circuit.

3. The novel vehicle rear entertainment system integrated panel as claimed in claim 1, characterized in that: It also includes a UART1 peripheral, which is electrically connected to the Android system core board module circuit.

4. The novel vehicle rear entertainment system integrated panel as claimed in claim 1, characterized in that: It also includes a CAN plug-in box, which is electrically connected to the MCU.

5. The novel integrated board for rear-seat entertainment system as claimed in claim 1, characterized in that: It also includes a reset button, which is electrically connected to the MCU.

6. The novel integrated board for the rear-seat entertainment system of claim 1, characterized in that: It also includes an ACC ILL port, which is electrically connected to the MCU.

7. The novel integrated board for rear-seat entertainment system as claimed in claim 1, characterized in that: It also includes a USB fast charging chip circuit, which is electrically connected to the Android system core board module circuit.

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