CN209719488U - A car audio and video device - Google Patents

Abstract

The utility model provides a kind of vehicle-mounted audio/video device, including processor, touch screen, display screen, GPS positioning module, the processor is connect with the touch screen, display screen and GPS positioning module respectively, further include: hard disk, USB connection circuit, external display circuit and vehicle-carrying display screen, wherein, the hard disk is connect by USB connection circuit with the USB interface pin of the processor, so that the processor executes read-write operation to the hard disk；The input terminal and output end of the external display circuit are connect with the high-definition media interface pin and vehicle-carrying display screen of the processor respectively, the high-definition multimedia signal that processor exports are converted to color difference components signal, and in car-mounted display screen display.After adopting the above technical scheme, having combined navigation and audio-visual amusement function；The installation space of console is saved, it is easy to operate；Two-way vehicle-carrying display screen is supported to show.

Description

A car audio and video device

technical field

The utility model relates to the field of vehicle-mounted equipment, in particular to a vehicle-mounted audio-visual device.

Background technique

With the development of automobile industry technology, in order to meet the needs of navigation and entertainment during the driving journey, various in-vehicle devices such as in-vehicle navigation equipment, in-vehicle display screens, and in-vehicle hard disk players have emerged, which have solved the above needs in terms of functions. In the prior art, especially in the application of commercial vehicles (such as passenger cars), the on-board navigation device and the on-board hard disk player are two independent devices, wherein the electrical structure block diagram of the on-board navigation device 100 is shown in FIG. 1 . , the device is installed on the center console of the vehicle, takes the processor 101 as the core, realizes the positioning and navigation functions through the GPS positioning module 106, realizes the human-computer interaction operation through the display screen 103 and the touch screen 102, and also has a USB flash drive 104 and SD memory card 105 to play video files. As shown in FIG. 2 , the in-vehicle hard disk player 200 is connected to the hard disk 202, which can store large-capacity audio and video files. The audio and video files are played and displayed on 205 for passengers to watch, and the device realizes human-computer interaction through a simple display screen 203 and a keyboard 204 .

The above equipment still has the following technical problems:

1. The in-vehicle navigation equipment and the in-vehicle hard disk player are independently installed in the center console, which occupies a large installation space and is cumbersome to operate;

2. The playback interface of the on-board hard disk player is displayed on the on-board display screen, and the staff must leave the driving seat when operating, which is inconvenient;

3. Although the vehicle navigation device has the multimedia display function, it can only be viewed by the driver's seat, and the passengers on the bus cannot watch it, and the storage medium capacity of the device is small, which cannot meet the needs of audio-visual entertainment in long-distance travel.

Therefore, it is necessary to design an in-vehicle audio-visual device for commercial vehicles, which can be compatible with navigation functions and audio-visual entertainment functions for passengers.

Utility model content

In order to overcome the above-mentioned technical defects, the purpose of the present utility model is to provide an in-vehicle audio-visual device for commercial vehicles, which can simultaneously have a navigation function and an audio-visual entertainment function for passengers, which is convenient for drivers to view the navigation interface and control the playback of audio-visual entertainment files. operate.

The utility model discloses a vehicle-mounted audio-visual device, which comprises a processor, a touch screen, a display screen and a GPS positioning module. The processor is respectively connected with the touch screen, the display screen and the GPS positioning module, and further comprises: a hard disk and a USB connection circuit , an external display circuit and a vehicle-mounted display screen, wherein the hard disk is connected with the USB interface pins of the processor through a USB connection circuit, so that the processor can perform read and write operations on the hard disk; the external display circuit The input end and the output end of the processor are respectively connected with the high-definition multimedia interface pins of the processor and the vehicle-mounted display screen, and the high-definition multimedia signal output by the processor is converted into a color difference component signal and displayed on the vehicle-mounted display screen.

Preferably, the USB connection circuit includes: a current-limiting protection element connected in series between the hard disk and the USB interface pins of the processor.

Preferably, the external display circuit includes: a signal conversion chip and an analog shunt chip, wherein the high-definition multimedia interface pins of the signal conversion chip are connected to the high-definition multimedia interface pins of the processor, and the signal conversion chip The color difference component signal output pin of the chip is connected with the input pin of the analog shunt chip, and the output pins of the analog shunt chip are respectively connected with two vehicle-mounted display screens, so that the color difference component signal is divided into two parts. for two-way display.

Preferably, the in-vehicle audio-visual device further comprises: a USB flash disk and an SD memory card, which are respectively connected to the processor.

Preferably, the in-vehicle audio-visual device further comprises: a clock circuit, a power supply circuit and a dynamic memory, which are respectively connected to the processor.

Preferably, the in-vehicle audio-visual device further comprises: a remote control and a signal receiving circuit, the signal receiving circuit is connected to the input interface pin of the processor, receives the control signal sent by the remote control and transmits it to the processing device.

Preferably, the vehicle-mounted audio-visual device further comprises: a cuboid-shaped box body, a front frame, a screen bracket, a drive board and a connecting bracket; the box body is sequentially assembled with a core circuit board, a hard disk bracket and a hard disk from the bottom up, wherein, The processor, the GPS positioning module, the USB connection circuit and the external display circuit are arranged on the core circuit board; after the touch screen, the front frame, the display screen, the screen bracket and the driver board are combined and fixed in the order from front to back, Then, it is assembled on the front side of the box body through the connecting bracket.

Preferably, the in-vehicle audio-visual device further comprises: two button panels, which are arranged on both sides of the front frame, and the button panels are connected with the input interface pins of the processor.

Preferably, the USB connection circuit further comprises: a hard disk interface socket with 6 pins, which are respectively connected to the power supply, ground wire and USB wire on the core circuit board; the lead wire of the hard disk is inserted into the hard disk interface socket superior.

After adopting the above-mentioned technical scheme, compared with the prior art, it has the following beneficial effects:

1. At the same time, it takes into account the functions of navigation and audio-visual entertainment;

2. Save the installation space of the center console, easy to operate;

3. Support dual-channel vehicle display display.

Description of drawings

Fig. 1 is the electrical structure block diagram of vehicle-mounted navigation equipment in the prior art;

Fig. 2 is the electrical structural block diagram of the vehicle-mounted hard disk player in the prior art;

Fig. 3 accords with the electrical structure block diagram of the vehicle-mounted audio-visual device in a preferred embodiment of the present invention;

FIG. 4 is a mechanical structure diagram of the in-vehicle audio-visual device in FIG. 3 .

Reference number:

100-car navigation equipment, 101-processor, 102-touch screen, 103-display screen, 104-USB flash drive, 105-SD memory card, 106-GPS positioning module, 200-car hard disk player, 201-processor, 202-hard disk, 203-simple display, 204-keyboard, 205-car display, 300-car audio and video device, 301-processor, 302-touch screen, 303-display, 304-USB flash drive, 305-SD storage Card, 306-GPS positioning module, 307-hard disk, 308-USB connection circuit, 309-external display circuit, 3091-signal conversion chip, 3092-analog split chip, 310-car display screen, 311-clock circuit, 312 -Power supply circuit, 313-dynamic memory, 314-signal receiving circuit, 315-remote control, 321-top cover, 322-bottom cover, 323-front frame, 324-screen bracket, 325-drive board, 326-connection bracket, 327-core circuit board, 328-hard disk bracket, 329-button panel, 330-cooling plate.

Detailed ways

It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict. The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

In order for those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained without creative work by persons of ordinary skill in the art shall belong to the protection scope of the present invention.

It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. . It is to be understood that the data so used may be interchanged under appropriate circumstances so that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", and any variations thereof, are intended to cover non-exclusive inclusion.

In order to combine the in-vehicle navigation function and the in-vehicle audio-visual function into one, the inventor improved the in-vehicle navigation equipment in the prior art, and added a hard disk and related hardware circuits to the existing in-vehicle navigation equipment to support the Read function and video file playback function. Specifically, as shown in FIG. 3 , the core component of the in-vehicle audio-visual equipment 300 is the processor 301, the model of which can be selected as TCC7871, which is a high-performance CPU with multimedia data processing capability and can run the Android operating system. Around the processor 301, a touch screen 302, a display screen 303 and a GPS positioning module 306 are respectively connected, and the processor 301 interacts with the touch screen 302 and the display screen 303 through the driver board 325 shown in FIG. Operation identification; the processor 301 is connected to the GPS positioning module 306 through the serial port pins to obtain positioning information to support the navigation function. The processor 301 is also connected to the clock circuit 311 , the power circuit 312 and the dynamic memory 313 respectively, so as to realize the basic support required for the operation of the processor 301 . The application implementation of the above-mentioned components and modules is common knowledge in the art, and those skilled in the art can implement the programming application of the above-mentioned component modules according to the technical manual of the above-mentioned processor 301 , which will not be repeated herein. The improvement of this embodiment is that a USB connection circuit 308 and an external display circuit 309 are added, the electrical connection between the processor 301 and the hard disk 307 is realized through the USB connection circuit 308, and the processor 301 and the vehicle-mounted display circuit 309 are realized through the external display circuit 309. Electrical connections between display screens 310 . Specifically, the USB connection circuit 308 is an electrical path including two USB connection lines, one end of which is connected to the USB interface pin of the processor 301 , and the other end of which is connected to the hard disk 307 . In order to achieve better electrical protection, the USB connection circuit 308 further includes a current-limiting protection element, which is connected in series between the hard disk 307 and the USB interface pins of the processor 301. The current-limiting protection element may be a high-voltage protection element. resistance value of resistance. The above-mentioned electrical structure realizes the electrical connection between the processor 301 and the hard disk 307, so that the processor 301 can perform read and write operations on the hard disk 307, that is, it can read the large-capacity audio and video files stored in the hard disk 307, such as movies, TV dramas and other files. At the same time, the touch screen 302 and the display screen 303 are used to realize human-computer interaction, so that the operation of the navigation function and the hard disk playback function is unified, and the operation is convenient for the user.

After the processor 301 obtains the audio and video files, it also needs to transmit the video signal to the vehicle-mounted display screen 310, and the output format of the above-mentioned processor 301 is a high-definition multimedia format, that is, the HDMI format, and the format supported by the vehicle-mounted display screen 310 is the color difference component. The signal format, that is, the YPBPR signal format, also needs an external display circuit 309 for signal conversion. The input end and the output end of the external display circuit 309 are respectively connected with the high-definition multimedia interface pins of the processor 301 and the vehicle-mounted display screen 310, and the high-definition multimedia signal output by the processor 301 is converted into a color difference component signal, and is displayed on the vehicle. displayed on the display screen 310 . Specifically, the external display circuit 309 includes a signal conversion chip 3091, whose model can be selected as CH7103B, whose high-definition multimedia interface pins are connected to the high-definition multimedia interface pins of the processor 310, and whose color difference component signal output pins are connected to The vehicle-mounted display screen 310 is connected, thereby realizing the conversion and playback of the video signal. In addition, in a large passenger car, there are two on-board display screens 310 in the car, so the video signal needs to be split and displayed, so the external display circuit 309 also includes an analog split chip 3092, the model of which can be selected as AD8142, with four Channel analog shunt function, the color difference component signal output pin of the signal conversion chip 3091 is connected with the input pin of the analog shunt chip 3092, and the output pin of the analog shunt chip 3092 is respectively connected with the two 310 on-board display screens are connected, so that the color difference component signal can be divided into two channels for display.

In other embodiments, in addition to the hard disk 307, other types of storage media can also be added to the vehicle-mounted audio-visual equipment 300, such as a USB flash disk 304 and an SD memory card 305, which are respectively connected to the processor 301, so that the above storage media can be selected. The medium stores navigation maps, music files, and other files with slightly smaller capacity or files that need to be copied frequently. In addition, in order to enrich user operation modes, the vehicle audio-visual device 300 further includes a remote control 315 and a signal receiving circuit 314, and optical signals, such as infrared rays, can be used for information transmission between the two. The signal receiving circuit 314 is connected to the input interface pin of the processor 301, and transmits the received control signal sent by the remote controller 315 to the processor 301, thereby realizing the remote control function.

In addition to the improvement of the hardware circuit, the inventor also made further improvements in the mechanical structure to optimize the installation layout of the device. Specifically, refer to FIG. 4 , which is a mechanical structure diagram of the vehicle-mounted audio-visual device 300 in FIG. 3 . The main structure of the vehicle-mounted audio-visual device 300 is a rectangular box body composed of a top cover 321 , a bottom cover 322 and a radiator 330 . In the case, the core circuit board 327 , the hard disk bracket 328 and the hard disk 307 are sequentially assembled from the bottom to the top, so that the space of the case is fully utilized to realize the installation of the hard disk 307 . The processor 301 , the GPS positioning module 306 , the USB connection circuit 308 and the external display circuit 309 are arranged on the core circuit board 327 . In order to support the user's operation, the in-vehicle audio-visual device 300 also includes a touch screen 302 , a front frame 323 , a display screen 303 , a screen bracket 324 , and a drive board 325 . The front side of the box is for the user to perform interactive operations from the front side. When the in-vehicle audio-visual equipment 300 is installed on the center console of the vehicle, its front side is exposed on the surface of the center console. Through the above structural improvement, the installation space of the existing equipment is fully utilized, no additional installation structure needs to be added, and the cost is saved; the operation is also simplified and user-friendly.

In order to provide various operation modes, in other embodiments, the in-vehicle audio-visual device 300 may further include two key panels 329 disposed on both sides of the front frame 323 to allow the user to perform key operations. Correspondingly, in terms of hardware circuit, the key panel 329 is connected with the input interface pins of the processor 301 .

In order to facilitate the plug-in operation of the hard disk 307 , the USB connection circuit 308 further includes a hard disk interface socket, which is arranged on the core circuit board 327 , and the socket has 6 pins, which are respectively connected with the power supply, the ground wire and the ground wire on the core circuit board 327 . The USB cable is connected to supply power to the hard disk 307 and connect the USB data path. The socket also reserves an input and output interface so that the processor 301 can send out control signals or read status signals. When the hard disk 307 is connected, the leads of the hard disk 307 are plugged into the hard disk interface socket, so as to realize quick plugging and convenient operation.

It should be noted that the embodiments of the present utility model have better practicability, and do not limit the present utility model in any form. Any person skilled in the art may use the above disclosed technical content to change or modify it to be equivalently effective. Embodiments, as long as they do not depart from the content of the technical solutions of the present invention, any modifications or equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still belong to the scope of the technical solutions of the present invention.

Claims (9)

1. a kind of vehicle-mounted audio/video device, including processor, touch screen, display screen, GPS positioning module, the processor respectively with The touch screen, display screen and GPS positioning module connection, which is characterized in that further include: it is hard disk, USB connection circuit, external aobvious Showing circuit and vehicle-carrying display screen, wherein the hard disk is connect by USB connection circuit with the USB interface pin of the processor, So that the processor executes read-write operation to the hard disk；The input terminal and output end of the external display circuit respectively with institute High-definition media interface pin and the vehicle-carrying display screen connection for stating processor, the high-definition multimedia signal of processor output is converted For color difference components signal, and in car-mounted display screen display.

2. vehicle-mounted audio/video device as described in claim 1, which is characterized in that the USB connection circuit includes: current-limiting protection member Part is serially connected between the hard disk and the USB interface pin of the processor.

3. vehicle-mounted audio/video device as described in claim 1, which is characterized in that the external display circuit includes: signal conversion Chip and analog quantity branch chip, wherein the high-definition media interface pin of the signal conversion chip and the processor The connection of high-definition media interface pin, the color difference components signal output pin of the signal conversion chip and the analog quantity branch The input pin of chip connects, and the output pin of the analog quantity branch chip is connect with two vehicle-carrying display screens respectively, so that The color difference components signal is divided into two-way and shows.

4. vehicle-mounted audio/video device as described in any one of claims 1-3, which is characterized in that further include: USB flash drive and SD are deposited Card storage is connected to the processor respectively.

5. vehicle-mounted audio/video device as described in any one of claims 1-3, which is characterized in that further include: clock circuit, power supply electricity Road and dynamic memory, are connected to the processor respectively.

6. vehicle-mounted audio/video device as described in any one of claims 1-3, which is characterized in that further include: remote controler and signal connect Circuit is received, the signal receiving circuit is connect with the input interface pin of the processor, receives the control that the remote controler issues Signal processed is simultaneously transmitted to the processor.

7. vehicle-mounted audio/video device as described in claim 1, which is characterized in that further include: the cabinet of rectangular-shape, front plane frame, Screen mount, driving plate and connecting bracket；Successively be equipped with upwards from bottom in the cabinet core circuit plate, hard disk bracket and Hard disk, wherein the processor, GPS positioning module, USB connection circuit and external display circuit are set to the core circuit plate On；After the touch screen, front plane frame, display screen, screen mount, driving plate are fixed according to order combination from front to back, then lead to Cross the leading flank that connecting bracket is assemblied in the cabinet.

8. vehicle-mounted audio/video device as claimed in claim 7, which is characterized in that further include: two key panels, before described Surface frame two sides, the key panel are connect with the input interface pin of the processor.

9. vehicle-mounted audio/video device as claimed in claim 7, which is characterized in that the USB connection circuit further include: hard-disk interface Socket is 6 stitch, connect respectively with power supply, ground wire and the USB line on the core circuit plate；The lead grafting of the hard disk In on the hard-disk interface socket.