Vehicle-mounted monitoring circuit, vehicle-mounted equipment and vehicle

Abstract

The utility model discloses a vehicle-mounted monitoring circuit, vehicle-mounted equipment and a vehicle, the vehicle-mounted monitoring circuit comprises a main controller, a resistance switching unit and a monitoring video decoding unit, the main controller is respectively connected with the resistance switching unit and the monitoring video decoding unit, the resistance switching unit comprises a first resistor and a second resistor, the first resistor is connected with the monitoring video decoding unit, and the second resistor is connected with the monitoring video decoding unit. The main controller is connected to a first resistor in the resistance switching unit and outputs an MIPI display signal to the HDMI display screen for display; or / and the main controller is connected to the second resistor in the resistor switching unit and outputs the MIPI display signal to the MIPI display screen for display. According to the circuit provided by the invention, different video channels can be used through hardware resistor selective welding and constraint design according to different scenes, so that the same hardware circuit board is adaptive to various video application scenes.

Description

Technical Field

[0001] The present application relates to the field of vehicle-mounted monitoring technology, and in particular to a vehicle-mounted monitoring circuit, a vehicle-mounted device, and a vehicle. Background Art

[0002] In order to achieve full video coverage around the vehicle, the on-board equipment is usually composed of multiple cameras, which ultimately transmit the video surveillance signal to the main control unit for processing, and display the camera video or other video signals on the display screen; depending on the application scenario and interface type, the on-board video input cameras usually include AHD protocol interface cameras and GMSL protocol cameras.

[0003] For the video solutions of GMSL protocol video input and MIPI display output or AHD protocol video input and HDMI display output, the main control device needs to consider designing a variety of different hardware circuits to adapt to video input and output devices of different protocol types. Utility Model Content

[0004] The embodiments of the present application provide a vehicle-mounted monitoring circuit, a vehicle-mounted device, and a vehicle to provide a monitoring circuit that is compatible with different video input and output devices.

[0005] The present application embodiment adopts the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides a vehicle-mounted monitoring circuit, wherein the vehicle-mounted monitoring circuit includes: a main controller, a resistance switching unit, and a monitoring video decoding unit, the main controller is respectively connected to the resistance switching unit and the monitoring video decoding unit, the resistance switching unit includes a first resistor and a second resistor, the main controller is connected to the first resistor in the resistance switching unit, and outputs a MIPI display signal to an HDMI display screen for display; the main controller is connected to the second resistor in the resistance switching unit, and outputs a MIPI display signal to the MIPI display screen for display.

[0007] In some embodiments, the input ends of the first resistor and the second resistor share a pad during PCB design, and the output ends are divided into two paths and connected to two different endpoints.

[0008] In some embodiments, the main controller includes: a first MIPI CSI controller and a second MIPI CSI controller,

[0009] The first MIPI CSI controller receives the AHD camera signal and sends it to the MIPI display screen;

[0010] The second MIPI CSI controller receives the GMSL camera signal and sends it to the HDMI display.

[0011] In some embodiments, the main controller includes: a MIPIDSI controller,

[0012] The MIPI DSI controller is directly output to the MIPI display screen through resistor welding or output to the HDMI screen display through the HDMI protocol conversion module.

[0013] In some embodiments, the monitoring video decoding unit includes a GMSL monitoring video decoding unit and an AHD monitoring video decoding unit.

[0014] The GMSL monitoring video decoding unit decodes the GMSL video into a digital video signal and packages it into the MIPI CSI protocol;

[0015] The AHD monitoring video decoding unit decodes the AHD video into a digital video signal and packages it into the MIPI CSI protocol.

[0016] In some embodiments, it also includes: an AHD camera and a GMSL camera.

[0017] In some embodiments, the first resistor includes five groups of ten signals and each group includes one CLK line and four Data lines, and the second resistor includes five groups of ten signals and each group includes one CLK line and four Data lines.

[0018] In some embodiments, the main controller, the resistance switching unit, the HDMI display screen, the MIPI display screen, and the monitoring video decoding unit use the same circuit board.

[0019] In a second aspect, an embodiment of the present application further provides a vehicle-mounted device, which includes the vehicle-mounted monitoring circuit described in the first aspect.

[0020] In a third aspect, an embodiment of the present application further provides a vehicle, which includes the vehicle-mounted equipment described in the second aspect.

[0021] At least one of the above technical solutions adopted in the embodiments of the present application can achieve the following beneficial effects: the main controller, the resistor switching unit, and the monitoring video decoding unit in the vehicle-mounted monitoring circuit, the main controller is respectively connected to the resistor switching unit and the monitoring video decoding unit. Through the resistor switching unit, one MIPI output display signal of the main controller can be switched to two signal outputs after resistor welding, so that one signal is directly output to the MIPI display screen, and the other signal is output to the HDMI display screen after HDMI protocol conversion. Through the above-mentioned vehicle-mounted monitoring circuit, the GMSL camera / AHD camera video input and MIPI display / HDMI display output circuit are integrated on a hardware circuit board, and different video paths are used according to different scenarios through hardware resistor welding and constraint design, so that a variety of video application scenarios can be adapted on the same hardware circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0023] Figure 1 The schematic diagram of the vehicle monitoring circuit structure of the video solution with GMSL protocol video input and MIPI display output;

[0024] Figure 2 A schematic diagram of the structure of the vehicle monitoring circuit with AHD protocol video input and HDMI display output video solution;

[0025] Figure 3 This is a schematic diagram of the internal structure of the vehicle-mounted monitoring circuit in an embodiment of the present application;

[0026] Figure 4 Schematic diagram of the circuit principle of the vehicle-mounted monitoring circuit in the embodiment of the present application. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0028] The technical solutions provided by various embodiments of the present application are described in detail below in conjunction with the accompanying drawings.

[0029] The embodiment of the present application provides a vehicle-mounted monitoring circuit 300, such as Figure 3As shown, a schematic diagram of the internal structure of the vehicle-mounted monitoring circuit in an embodiment of the present application is provided, and the vehicle-mounted monitoring circuit includes: a main controller 310, a resistance switching unit 320, and a monitoring video decoding unit 330. The main controller 310 is respectively connected to the resistance switching unit 320 and the monitoring video decoding unit 330. The resistance switching unit 320 includes a first resistor and a second resistor. When the main controller 310 is welded to the first resistor in the resistance switching unit, the MIPI display signal of the main controller is output to the HDMI display screen for display; when the main controller 310 is welded to the second resistor in the resistance switching unit, the MIPI display signal of the main controller is output to the MIPI display screen for display.

[0030] The main controller 310 includes two MIPI CSI controllers, which respectively receive decoded multi-channel AHD or multi-channel GMSL camera signals. According to the needs of the main controller 310, the multi-channel camera signals or other videos are sent to the MIPI display or HDMI display for presentation. Figure 3 As shown, four-channel AHD or multi-channel GMSL camera signal access is adopted, and the four-channel is only for example and is not intended to limit the scope of protection of this application.

[0031] It should be noted that in Figure 1 or Figure 2 In the solution, a CSI controller is usually used to only receive the MIPI CSI signal sent by the GMSL or AHD decoding chip. In the embodiment of the present application, two CSI controllers are used to directly receive two video signals. Although there is only one MIPI DSI control interface for the display part, the resistor switching unit 320 can switch the one-way MIPI output display signal of the main controller 310 to two-way signal output after resistor welding, and directly output it to the MIPI display screen through resistor welding or send it to the HDMI screen display after protocol conversion.

[0032] like Figure 4 As shown, the resistor switching unit 320 can be used to switch one MIPI output display into two outputs after hardware resistor selection and welding, one of which is directly output to the MIPI display screen and the other is output to the HDMI screen display after protocol conversion.

[0033] Furthermore, the monitoring video decoding unit 330 can be implemented using a mature decoding chip to decode multiple GMSL or multiple AHD videos into digital video signals and package them into the MIPI CSI protocol, which will not be described in detail in this application.

[0034] In one embodiment of the present application, when an HDMI display screen is used, a first resistor is welded; when a MIPI display screen is used, a second resistor is welded, wherein the input ends of the first resistor and the second resistor share a pad during PCB design, and the output ends are divided into two paths and connected to two different endpoints.

[0035] In one case, the display end uses an HDMI display screen. In this case, the first resistor is soldered.

[0036] Another case is that the display end uses a MIPI display screen. In this case, the second resistor is welded.

[0037] When considering and designing the first resistor and the second resistor, the input ends of the first resistor and the second resistor share a pad when designing the PCB (printed circuit board), and the output ends are divided into two paths and connected to two different endpoints. In specific implementation, a common pad design is adopted in hardware, that is, the input ends of the two resistors use a pad, and the outputs are divided into two paths and connected to two different endpoints, which can minimize the high-speed signal integrity problem caused by bifurcated routing.

[0038] In one embodiment of the present application, the main controller includes: a first MIPI CSI controller and a second MIPI CSI controller, the first MIPI CSI controller receives an AHD camera signal and sends it to a MIPI display; the second MIPI CSI controller receives a GMSL camera signal and sends it to an HDMI display.

[0039] like Figure 4 As shown, resistors R1 and R2 play the role of signal coupling switching. The two resistors separate the main control signal into two outputs. The input ends of the two resistors are connected together, and the outputs are connected to two MIPI display outputs. One is directly output to the MIPI display, and the other is output to the HDMI screen after protocol conversion.

[0040] In one embodiment of the present application, the main controller includes: a MIPI DSI controller, and the MIPI DSI controller is directly output to the MIPI display screen through resistor welding or sent to the HDMI screen display through an HDMI protocol conversion module.

[0041] like Figure 4 As shown in the figure, when using an HDMI display, solder the R1 resistor, and when using a MIPI display, solder the R2 resistor. The input ends of R1 and R2 share a pad during PCB design. In this way, by selecting the corresponding video input and output channels through resistor selection, a hardware circuit board can be adapted to four GMSL cameras and four AHD surveillance camera inputs.

[0042] In one embodiment of the present application, the monitoring video decoding unit includes a GMSL monitoring video decoding unit and an AHD monitoring video decoding unit. The GMSL monitoring video decoding unit decodes the GMSL video into a digital video signal and packages it into the MIPI CSI protocol; the AHD monitoring video decoding unit decodes the AHD video into a digital video signal and packages it into the MIPI CSI protocol.

[0043] In one embodiment of the present application, it also includes: an AHD camera and a GMSL camera.

[0044] like Figure 4 As shown, an AHD camera and a GMSL camera are also connected in the display channel, so that the video solution of GMSL protocol video input and MIPI display output or the video solution of AHD protocol video input and HDMI display output can be compatible.

[0045] In one embodiment of the present application, the AHD camera includes at least four AHD cameras.

[0046] like Figure 4 As shown, four channels are used as the preferred access for camera signals. Based on AHD technology, AHD cameras can achieve reliable transmission of high-definition video signals over ultra-long distances, such as 500 meters, on existing analog transmission lines. In addition, AHD cameras use Y / C signal separation and analog filtering technology, which can effectively reduce color noise in high-frequency areas and provide better restoration of monitoring images.

[0047] In one embodiment of the present application, the GMSL camera includes at least four GMSL cameras.

[0048] like Figure 4 As shown, four channels are preferably used for accessing camera signals.

[0049] In one embodiment of the present application, the first resistor includes five groups of ten signals, each group includes one CLK line and four Data lines, and the second resistor includes five groups of ten signals, each group includes one CLK line and four Data lines.

[0050] The resistor plays the role of signal coupling switching. Through two resistors (the first resistor and the second resistor), the main control signal is separated into two outputs. The input ends of the two resistors are connected together, and the outputs are connected to two MIPI display outputs, that is, one is directly output to the MIPI display screen, and the other is output to the HDMI screen after protocol conversion. In this way, 5 groups of 10 signals require a total of 20 such switching resistors (the first resistor and the second resistor), and each group includes 1 CLK line and 4 Data lines.

[0051] In one embodiment of the present application, the main controller, the resistance switching unit, the HDMI display screen, the MIPI display screen and the monitoring video decoding unit use the same circuit board.

[0052] Deploying the main controller, the resistance switching unit, the HDMI display screen, the MIPI display screen and the monitoring video decoding unit on the same circuit board can achieve an integrated design, effectively save hardware costs and facilitate hardware management and maintenance.

[0053] In an embodiment of the present application, a vehicle-mounted device is further provided, including the vehicle-mounted monitoring circuit, wherein the vehicle-mounted monitoring circuit includes: a main controller, a resistance switching unit, and a monitoring video decoding unit, wherein the main controller is connected to the resistance switching unit and the monitoring video decoding unit respectively, and the resistance switching unit includes a first resistor and a second resistor.

[0054] When the first resistor in the resistor switching unit is welded, the MIPI display signal of the main controller is output to the HDMI display screen for display;

[0055] When the second resistor in the resistor switching unit is welded, the MIPI display signal of the main controller is output to the MIPI display screen for display.

[0056] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A vehicle monitoring circuit, wherein: The vehicle-mounted monitoring circuit comprises: a main controller, a resistance switching unit, and a monitoring video decoding unit, wherein the main controller is connected to the resistance switching unit and the monitoring video decoding unit respectively, and the resistance switching unit comprises a first resistor and a second resistor. The main controller is connected to the first resistor in the resistor switching unit to output the MIPI display signal to the HDMI display screen for display; or / and, The main controller is connected to the second resistor in the resistor switching unit to output the MIPI display signal to the MIPI display screen for display.

2. The vehicle-mounted monitoring circuit as claimed in claim 1, wherein: The input ends of the first resistor and the second resistor share a pad during PCB design, and the output ends are divided into two paths and connected to two different endpoints.

3. The vehicle-mounted monitoring circuit as claimed in claim 1, wherein: The main controller includes: a first MIPI CSI controller and a second MIPI CSI controller, The first MIPI CSI controller receives the AHD camera signal and sends it to the MIPI display; The second MIPI CSI controller receives the GMSL camera signal and sends it to the HDMI display.

4. The vehicle-mounted monitoring circuit as claimed in claim 3, wherein: The main controller includes: a MIPIDSI controller, The MIPI DSI controller is directly output to the MIPI display screen through resistor welding or output to the HDMI screen display through the HDMI protocol conversion module.

5. The vehicle-mounted monitoring circuit as claimed in claim 1, wherein: The monitoring video decoding unit includes a GMSL monitoring video decoding unit and an AHD monitoring video decoding unit. The GMSL monitoring video decoding unit decodes the GMSL video into a digital video signal and stores it in the MIPI CSI protocol; The AHD monitoring video decoding unit decodes the AHD video into a digital video signal and stores it in the MIPI CSI protocol.

6. The vehicle-mounted monitoring circuit as claimed in claim 5, wherein: Also includes: AHD camera and GMSL camera.

7. The vehicle-mounted monitoring circuit as claimed in claim 2, wherein: The first resistor includes five groups of ten signals, and each group includes one CLK line and four Data lines. The second resistor includes five groups of ten signals, and each group includes one CLK line and four Data lines.

8. The vehicle-mounted monitoring circuit as claimed in claim 1, wherein: The main controller, the resistance switching unit, the HDMI display screen, the MIPI display screen and the monitoring video decoding unit use the same circuit board.

9. A vehicle-mounted device, wherein: The vehicle-mounted monitoring circuit comprises the vehicle-mounted monitoring circuit as claimed in any one of claims 1 to 8.

10. A vehicle, wherein: Comprising the vehicle-mounted device as claimed in claim 9.

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