Portable vehicle-mounted screen projection intelligent terminal

Abstract

The embodiment of the utility model discloses a portable vehicle-mounted screen projection intelligent terminal. The intelligent terminal comprises a mainboard, a television receiving antenna, a radio frequency receiving module and a display screen, wherein an operating system runs on the mainboard, and a screen projection application program and a digital television application program are installed in the operating system; the television receiving antenna is connected to the radio frequency receiving module through an antenna feeder and is used for receiving digital television signals; the radio frequency receiving module is used for demodulating the digital television signal and sending the demodulated signal to the mainboard in the form of TS stream data; and the main board is used for decoding the demodulated signal to obtain a video signal and outputting the video signal to the display screen. According to the technical scheme provided by the embodiment of the utility model, the disassembly and installation of a vehicle are avoided, and the function of a digital television is realized on the basis of realizing various high-end configuration functions through the projection screen.

Description

Technical Field

[0001] The embodiment of the utility model relates to the field of automobile intelligent technology, and in particular to a portable vehicle-mounted screen projection intelligent terminal. Background Art

[0002] With the development of automobile intelligence, in-vehicle intelligent systems have gradually attracted the attention of users. Whether it is a native car system or a modified third-party car system, it can make the driving process more intelligent. Various functions of high-end configurations, such as navigation, reversing images, assisted driving, and in-car entertainment, are also becoming more and more popular.

[0003] However, there are still some low-end cars on the market, whose in-car electronics may only have a CD player, and their functions may only realize CD / FM / USB and other music media functions. If you want to realize the functions of the above high-end configurations, and at the same time, some user groups also have the need for digital TV functions, in this case, it is often necessary to replace the car system. However, the labor cost required to replace the car system is high, and because the center console in the car needs to be disassembled to a certain extent, the replacement process is also likely to cause damage to the vehicle. Utility Model Content

[0004] The embodiment of the utility model provides a portable vehicle-mounted screen projection intelligent terminal to avoid dismantling the vehicle for installation, and realizes the functions of digital television on the basis of realizing a variety of high-end configuration functions through screen projection.

[0005] The utility model embodiment provides a portable vehicle-mounted screen projection intelligent terminal, which includes: a mainboard, a television receiving antenna, a radio frequency receiving module and a display screen; wherein,

[0006] An operating system is running on the mainboard, and a screen projection application and a digital TV application are installed in the operating system;

[0007] The television receiving antenna is connected to the radio frequency receiving module via an antenna feeder line for receiving digital television signals;

[0008] The radio frequency receiving module is used to demodulate the digital television signal and send the demodulated signal to the main board in the form of TS stream data;

[0009] The mainboard is used for decoding the demodulated signal to obtain a video signal, and outputting the video signal to the display screen.

[0010] Optionally, the radio frequency receiving module is an MTV818A chip.

[0011] Optionally, the RF receiving module is connected to the mainboard through an SPI interface; the SPI_MOSI pin of the SPI interface is connected to the GPD3 pin of the RF receiving module, for outputting a control signal of the mainboard to the RF receiving module; the SPI_MISO pin of the SPI interface is connected to the GPD0 pin of the RF receiving module, for receiving output data of the RF receiving module; the SPI_CS pin of the SPI interface is connected to the GPD1 pin of the RF receiving module, for enabling the RF receiving module to operate; the RST pin of the SPI interface is connected to the EN pin of the RF receiving module, for resetting the RF receiving module when the terminal is powered on; the VSYS_EN pin, VSYS1 pin and VSYS2 pin of the SPI interface are used to provide working power for the RF receiving module.

[0012] Optionally, the television receiving antenna is a retractable rod antenna, and the length in the extended state is 16-25 cm.

[0013] Optionally, the operating system is an embedded Linux operating system, and the main control chip adopts a CV7357 chip.

[0014] Optionally, the smart terminal further includes a front shell and a bottom shell, the display screen is embedded in the front shell, a receiving cavity is formed between the display screen and the bottom shell, and the mainboard, the TV receiving antenna and the radio frequency receiving module are fixed in the receiving cavity.

[0015] Optionally, the smart terminal further includes a bracket and a base, one end of the bracket is adjustably mounted on the bottom shell, and the other end is fixed to the base.

[0016] Optionally, the smart terminal further includes a bolt, a bracket rotating head, a bracket buckle and a knob, and the bolt sequentially passes through the bottom shell, the bracket rotating head, the bracket buckle and the bracket and then cooperates with the knob to be connected.

[0017] Optionally, the smart terminal further includes a touch screen, which is embedded in the face shell and disposed on the outer side of the display screen.

[0018] Optionally, the intelligent terminal further includes a lens module, and the lens module is connected to the mainboard via a lens cable; a driving record application is also installed in the operating system; wherein,

[0019] The lens module is used to receive the optical signal in front of the lens, and convert the optical signal into original dot matrix data and send it to the main board;

[0020] The mainboard is also used to generate a video file based on the original dot matrix data, and output the video file to the display screen and / or SD memory card.

[0021] The embodiment of the utility model provides a portable vehicle-mounted screen projection intelligent terminal, including a mainboard, a TV receiving antenna, a radio frequency receiving module and a display screen. An operating system is running on the mainboard. By installing a screen projection application in the operating system, many high-end configuration functions can be realized through screen projection. At the same time, a digital TV application is also installed in the operating system, and the digital TV signal is received and processed through the TV receiving antenna, the radio frequency receiving module and the mainboard, and then output to the display screen for display, so that the digital TV function can also be realized, enriching the application scenarios of the intelligent terminal, solving the needs of a certain user group for digital TV functions, and meeting people's concerns about real-time news and life entertainment dynamics, thereby increasing the market sales of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of a portable vehicle-mounted screen projection intelligent terminal provided in Embodiment 1 of the present utility model;

[0023] Figure 2 A schematic diagram of the structure of another portable vehicle-mounted screen projection intelligent terminal provided in the first embodiment of the utility model;

[0024] Figure 3 A structural schematic diagram of another portable vehicle-mounted screen projection intelligent terminal provided in the first embodiment of the utility model;

[0025] Figure 4 A digital TV control circuit diagram of a portable vehicle-mounted screen projection intelligent terminal provided in Embodiment 1 of the present utility model;

[0026] Figure 5 An exploded diagram of the structure of a portable vehicle-mounted projection screen smart terminal provided in Embodiment 1 of the present utility model;

[0027] Figure 6 An exploded view of another portable vehicle-mounted projection screen intelligent terminal structure provided in Embodiment 1 of the present utility model;

[0028] Figure 7 The signal connection relationship of the exemplary portable vehicle-mounted projection screen smart terminal provided in the first embodiment of the utility model;

[0029] Figure 8 This is a schematic diagram of the structure of an exemplary portable vehicle-mounted projection smart terminal provided in Example 1 of the utility model. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0031] Embodiment 1

[0032] Figure 1 This is a schematic diagram of the structure of a portable vehicle-mounted screen projection intelligent terminal provided in the first embodiment of the utility model. This embodiment is applicable to situations where a user needs to use functions such as navigation, audio and video, and digital TV when driving a vehicle. Figure 1 As shown, the smart terminal includes: a mainboard 100, a TV receiving antenna 200, a radio frequency receiving module 300 and a display screen 400; wherein, an operating system is run on the mainboard 100, and a screen projection application and a digital TV application are installed in the operating system; the TV receiving antenna 200 is connected to the radio frequency receiving module 300 through an antenna feeder to receive a digital TV signal; the radio frequency receiving module 300 is used to demodulate the digital TV signal and send the demodulated signal to the mainboard 100 as TS stream data; the mainboard 100 is used to decode the demodulated signal to obtain a video signal, and output the video signal to the display screen 400.

[0033] Specifically, for the screen projection function, you can install CarPlay and / or Android-AUTO and other screen projection applications on the smart terminal, and use all or part of the screen projection protocols such as Air Play and / or Andriod Play. By connecting with mobile terminals such as mobile phones, you can map the content on the mobile terminal to the smart terminal. The mobile terminal and the smart terminal can operate each other, so that the smart terminal has rich APP applications like mobile terminals, such as navigation, music, video, phone, Internet access, etc. Figure 2As shown, in terms of hardware, the smart terminal can include a WIFI / Bluetooth (BT) antenna 101 and a WIFI / Bluetooth (BT) module embedded in the mainboard 100 to cooperate with the screen projection application to realize the screen projection function. The WIFI / Bluetooth antenna 101 can be connected to the mainboard 100 through a shielded line 102 for receiving and transmitting WIFI / Bluetooth signals. The WIFI / Bluetooth module can be used to modulate the data stream sent by the mainboard 100 or demodulate the received external WIFI / Bluetooth signal. Accordingly, the mainboard 100 can be used to decode the data stream demodulated by the WIFI / Bluetooth module according to the WIFI / Bluetooth protocol, or transmit the data stream to the WIFI / Bluetooth module for modulation. Then the smart terminal can be used as a terminal (STA), the WIFI / Bluetooth module can be used as an access point (AP), and the main control chip of the mainboard 100 can be connected to the WIFI / Bluetooth module through the UART_SD1 interface to establish communication between the main control chip and the WIFI / Bluetooth module, and then modulate or demodulate through the WIFI / Bluetooth module to achieve communication with external WIFI or Bluetooth devices to establish a CarPlay or Android-AUTO session. Among them, Bluetooth can be used to discover devices and initialize connections. Users can search for Bluetooth devices by operating the settings function in the mobile terminal to find the Bluetooth name of the smart terminal and establish a connection with it. The smart terminal can then send WIFI credentials to the mobile terminal via Bluetooth to establish a WIFI connection between the mobile terminal and the smart terminal. Subsequently, audio streams, touch events, mapped images, etc. can be transmitted via WIFI, and phone calls can be implemented through the standard Bluetooth hands-free protocol (HFP), thereby realizing the screen projection function.

[0034] In terms of sound transmission, the smart terminal can transmit audio signals through FM frequency modulation, and can achieve audio transmission by adjusting the original car machine to the corresponding frequency for reception. It can also transmit audio signals through a wired connection with the original car machine through an audio and video cable, so that the original car machine of the car can be used to amplify the audio output to solve the defect of insufficient sound effect of the small speaker of the smart terminal itself. In terms of power supply, the car charger can be used to power the smart terminal, so that it can be used when the car machine is started and shut down when the car machine is turned off, reducing power consumption and improving convenience.

[0035] On the basis of supporting the screen projection function, a digital TV application corresponding to the digital TV function can be embedded in the operating system, so that the user can realize the digital TV function by directly operating the digital TV application on the smart terminal. Among them, optionally, the operating system is an embedded Linux operating system, and the main control chip adopts the CV7357 chip. That is, in terms of software, the mainboard 100 can adopt a lightweight embedded Linux operating system, and in terms of hardware, the mainboard 100 can select the CV7357 chip as the main control chip, which is a high-performance processor Cortex A53 core using ARM's V8 instruction set architecture, with a main frequency of 1.2GHZ and an internal integration of 256MB of DRAM. This structure greatly improves the CPU's computing speed and performance, and provides strong hardware support for the embedding of digital TV functions. In terms of operation, the user can click on the digital TV application through the UI operation interface to trigger the corresponding event, and then the digital TV application calls the driver of the RF receiving module 300 through the kernel API to enter the application.

[0036] Correspondingly, in terms of hardware, a radio frequency receiving module 300 can be embedded in the smart terminal to cooperate with the digital TV application to realize the digital TV function. Optionally, the radio frequency receiving module 300 is an MTV818A chip. RAONTECH's MTV818A chip integrates the baseband and radio frequency, effectively reducing costs and improving signal processing performance. It supports a frequency range of 470-806MHz and is suitable for ISDB-T's one-segment, that is, low-resolution (QVGA 320×240 / 320×180) programs for mobile terminals. The radio frequency receiving module 300 can obtain digital TV signals through the TV receiving antenna 200, demodulate the obtained digital TV signals, and then send the demodulated signals to the mainboard 100 as TS stream data. Then the mainboard 100 can decode the demodulated signal to obtain a video signal, and output it to the display screen 400 for playback.

[0037] Optionally, the TV receiving antenna 200 is a retractable rod antenna, and the length in the extended state is 16-25 cm. Specifically, according to the 1 / 4 wavelength theory, the minimum frequency of ISDB-T is 473.143 MHz, so the length of the selected TV receiving antenna 200 should be greater than (3*10^8 / (473.143*10^6))=0.15856 meters. Combined with the appropriate size of the smart terminal, the length of the TV receiving antenna 200 can be selected to be 16-25 cm, preferably 207 mm. At the same time, a retractable rod antenna can be selected to facilitate the use and protection of the TV receiving antenna 200. Figure 2 and Figure 3As shown, the mainboard 100, the TV receiving antenna 200 and the RF receiving module 300 can be placed at appropriate positions on the bottom shell 620 of the smart terminal, and the TV receiving antenna 200 and the RF receiving module 300 are connected through the antenna feeder 210, and the RF receiving module 300 and the mainboard 100 are connected through the TV cable 310. Optionally, the antenna feeder 210 is a coaxial shielded wire with an impedance of 50 ohms, thereby ensuring good signal reception. Among them, the TV receiving antenna 200 can be well fitted into the structure of the bottom shell 620, so that the TV receiving antenna 200 can be well fixed inside the bottom shell 620 in the retracted state, and at the same time, an antenna hole can be correspondingly set on the bottom shell 620, so that the user can pull the TV receiving antenna 200 out through the antenna hole to use it in an extended state.

[0038] When the MTV818A chip is used as the RF receiving module 300, further optional, such as Figure 4 As shown, the RF receiving module 300 is connected to the mainboard 100 through the SPI interface; the SPI_MOSI pin of the SPI interface is connected to the GPD3 pin of the RF receiving module 300, so as to output the control signal of the mainboard 100 to the RF receiving module 300; the SPI_MISO pin of the SPI interface is connected to the GPD0 pin of the RF receiving module 300, so as to receive the output data of the RF receiving module 300; the SPI_CS pin of the SPI interface is connected to the GPD1 pin of the RF receiving module 300, so as to enable the RF receiving module 300 to work; the RST pin of the SPI interface is connected to the EN pin of the RF receiving module 300, so as to reset the RF receiving module 300 when the terminal is powered on; the VSYS_EN pin, VSYS1 pin and VSYS2 pin of the SPI interface are used to provide working power for the RF receiving module 300. Specifically, when the user opens the digital TV application, the mainboard 100 outputs an enable signal through the VSYS_EN pin of the SPI interface, and based on the voltage value VSYS output by the VSYS1 pin and the VSYS2 pin, outputs the working power VDD3V3 of the RF receiving module 300 under the triggering of the enable signal.

[0039] On the basis of the above technical solution, optionally, Figure 5As shown, the smart terminal further includes a face shell 610 and a bottom shell 620, the display screen 400 is embedded in the face shell 610, a receiving cavity is formed between the display screen 400 and the bottom shell 620, and the main board 100, the TV receiving antenna 200 and the RF receiving module 300 are fixed in the receiving cavity. Furthermore, an antenna cap 220 may be provided at the end of the TV receiving antenna 200 to protect the TV receiving antenna 200, and an antenna small board 230 may also be provided to ensure the quality of signal reception.

[0040] Further optional, such as Figure 5 As shown, the smart terminal further includes a bracket 700 and a base 800, one end of the bracket 700 is adjustably mounted on the bottom shell 620, and the other end is fixed on the base 800. 3M glue 810 can be pasted under the base 800 to fix the smart terminal on the car center console.

[0041] Further optional, such as Figure 5 As shown, the smart terminal further includes a bolt 710, a bracket rotating head 720, a bracket buckle 730 and a knob 740. The bolt 710 sequentially passes through the bottom shell 620, the bracket rotating head 720, the bracket buckle 730 and the bracket 700 and then cooperates with the knob 740 to connect. Thus, the bracket 700 is adjustable, so that the user can adjust the angle of the smart terminal as needed when using it.

[0042] Further optional, such as Figure 5 As shown, the smart terminal further includes a touch screen 900, which is embedded in the face shell 610 and disposed on the outside of the display screen 400. The touch screen 900 provides a good human-computer interaction function for the user, so that the user can conveniently control the smart terminal through touch operation, such as clicking to enter the screen projection application or digital TV application, etc.

[0043] In addition, if Figure 5 As shown, the smart terminal may further include a button 1000, a button PCBA 1010, and a speaker cavity cover 1100. The button 1000 may realize functions such as power on and off through the button PCBA 1010, and a speaker may be provided in the speaker cavity cover 1100 to realize the sound of the machine.

[0044] On the basis of the above technical solution, optionally, Figure 2 and Figure 6As shown, the smart terminal also includes a lens module 103, and the lens module 103 is connected to the main board 100 via a lens cable 104; a driving record application is also installed in the operating system; wherein, the lens module 103 is used to receive the light signal in front of the lens, and convert the light signal into raw dot matrix data and send it to the main board 100; the main board 100 is also used to generate a video file based on the raw dot matrix data, and output the video file to the display screen 400 and / or SD memory card.

[0045] Specifically, Figure 6 As shown, the lens module 103 may include a lens ring 1031, a lens PCBA 1032, and a lens cover 1033. A CMOS sensor may be provided on the lens PCBA 1032, and the lens module 103 may generate a RAW native signal, i.e., original dot matrix data, according to the received light signal through the lens and the CMOS sensor. The mainboard 100 may select the CV7357 chip as the main control chip, and the lens module 103 may be specifically connected to the CV7357 chip through the MIPI_DSI interface. The CV7357 chip has its own ISP, supports HDR wide dynamic, 3D noise reduction, defogging, fisheye expansion and other image enhancement and correction algorithms, and can directly process the RAW native signal generated by the CMOS sensor to generate high-quality video image data. The CV7357 chip integrates the H.264 / 265 video compression codec, of which the maximum resolution of H.264 codec is 2880x1620@30fps and the maximum resolution of H.265 codec is 2880x1620@30fps. It supports multiple bit rate control modes such as CBR / VBR / FIXQP and supports region of interest (ROI) encoding. In terms of audio, the audio codec protocol (G.711, G.726, ADPCM) is integrated through software, and audio 3A (AEC, ANR, AGC) functions are supported. The mainboard 100 can process the original dot matrix data through the ISP inside the CV7357 chip to generate image data, and then generate the corresponding MOV or MP4 video file through the H.264 / 265 Codec codec and output it to the standard output stream (usually pointing to the text console, that is, the display screen 400). At the same time, the generated video file can be output to the SD memory card (such as TF card) through the pointer pointing, so as to realize the real-time storage of the video file, thereby realizing the DVR function. In summary, the signal connection relationship of the smart terminal is as follows: Figure 7 As shown, the structure of the whole machine is as follows Figure 8 shown.

[0046] The portable vehicle-mounted screen projection intelligent terminal provided by the embodiment of the utility model includes a mainboard, a TV receiving antenna, a radio frequency receiving module and a display screen. An operating system is running on the mainboard. By installing a screen projection application in the operating system, many high-end configuration functions can be realized through screen projection. At the same time, a digital TV application is also installed in the operating system, and the digital TV signal is received and processed through the TV receiving antenna, the radio frequency receiving module and the mainboard, and then output to the display screen for display, so that the digital TV function can also be realized, enriching the application scenarios of the intelligent terminal, solving the needs of a certain user group for digital TV functions, and meeting people's concerns about real-time news and life entertainment dynamics, thereby increasing the market sales of the product.

[0047] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A portable vehicle-mounted screen projection intelligent terminal, characterized in that: include: Mainboard, TV receiving antenna, RF receiving module and display screen; among them, An operating system is running on the mainboard, and a screen projection application and a digital TV application are installed in the operating system; The television receiving antenna is connected to the radio frequency receiving module via an antenna feeder line for receiving digital television signals; The radio frequency receiving module is used to demodulate the digital television signal and send the demodulated signal to the main board in the form of TS stream data; The mainboard is used for decoding the demodulated signal to obtain a video signal, and outputting the video signal to the display screen.

2. The portable vehicle-mounted screen projection intelligent terminal according to claim 1 is characterized in that: The radio frequency receiving module is an MTV818A chip.

3. The portable vehicle-mounted screen projection intelligent terminal according to claim 2 is characterized in that: The RF receiving module is connected to the main board through an SPI interface; the SPI_MOSI pin of the SPI interface is connected to the GPD3 pin of the RF receiving module, so as to output the control signal of the main board to the RF receiving module; the SPI_MISO pin of the SPI interface is connected to the GPD0 pin of the RF receiving module, so as to receive the output data of the RF receiving module; the SPI_CS pin of the SPI interface is connected to the GPD1 pin of the RF receiving module, so as to enable the RF receiving module to work; the RST pin of the SPI interface is connected to the EN pin of the RF receiving module, so as to reset the RF receiving module when the terminal is powered on; the VSYS_EN pin, VSYS1 pin and VSYS2 pin of the SPI interface are used to provide working power for the RF receiving module.

4. The portable vehicle-mounted screen projection intelligent terminal according to claim 1, characterized in that: The television receiving antenna is a retractable rod antenna, and the length in the extended state is 16-25 cm.

5. The portable vehicle-mounted screen projection intelligent terminal according to claim 1, characterized in that: The operating system is an embedded Linux operating system, and the main control chip adopts a CV7357 chip.

6. The portable vehicle-mounted screen projection intelligent terminal according to claim 1, characterized in that: The smart terminal also includes a front shell and a bottom shell. The display screen is embedded in the front shell. A receiving cavity is formed between the display screen and the bottom shell. The mainboard, the TV receiving antenna and the radio frequency receiving module are fixed in the receiving cavity.

7. The portable vehicle-mounted screen projection intelligent terminal according to claim 6, characterized in that: The intelligent terminal further comprises a bracket and a base, one end of the bracket is adjustably mounted on the bottom shell, and the other end is fixed on the base.

8. The portable vehicle-mounted screen projection intelligent terminal according to claim 7, characterized in that: The smart terminal further comprises a bolt, a bracket rotating head, a bracket buckle and a knob. The bolt sequentially passes through the bottom shell, the bracket rotating head, the bracket buckle and the bracket and then is matched and connected with the knob.

9. The portable vehicle-mounted screen projection intelligent terminal according to claim 6, characterized in that: The intelligent terminal further comprises a touch screen, which is embedded in the face shell and arranged on the outer side of the display screen.

10. The portable vehicle-mounted screen projection intelligent terminal according to any one of claims 1 to 9, characterized in that: The intelligent terminal also includes a lens module, which is connected to the mainboard via a lens cable; a driving record application is also installed in the operating system; wherein, The lens module is used to receive the optical signal in front of the lens, and convert the optical signal into original dot matrix data and send it to the main board; The mainboard is also used to generate a video file based on the original dot matrix data, and output the video file to the display screen and / or SD memory card.

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