CN220440782U

CN220440782U - GMSL signal generator for HUD test

Info

Publication number: CN220440782U
Application number: CN202321997151.XU
Authority: CN
Inventors: 卢睿; 蒋明智
Original assignee: Ruisi Huachuang Suzhou Technology Co ltd
Current assignee: Ruisi Huachuang Suzhou Technology Co ltd
Priority date: 2023-07-27
Filing date: 2023-07-27
Publication date: 2024-02-02
Anticipated expiration: 2033-07-27

Abstract

The utility model discloses a GMSL signal generator for HUD test, comprising: HUD; an MCU main control module; the input end of the GMSL serializer is electrically connected with the corresponding output end of the MCU main control module, and the output end of the GMSL serializer is electrically connected with the HUD through a coaxial signal line or a twisted pair signal line; when the MCU main control module works, a test picture signal is output and is output to the GMSL serializer in a video format of RGB888, and the GMSL serializer converts the received parallel video signal into a serial GMSL format signal and outputs the serial GMSL format signal to the HUD.

Description

GMSL signal generator for HUD test

Technical Field

The utility model relates to the technical field of HUD (head-up display) tests, in particular to a GMSL (gmsk signal generator) for a HUD test.

Background

GMSL-Gigabit Multimedia Serial Link (translated into gigabit multimedia serial link), which is a high-speed serial data transmission mode proposed by Maxim corporation, and is suitable for transmission of video, audio and control signals, and the whole transmission line comprises a serializer and a deserializer, and the distance can reach 15m or longer when using a 50Ω coaxial cable or a 100deg.Ω Shielded Twisted Pair (STP) cable; more and more vehicle factories employ GMSL for transmitting image video, including vehicle body domain controllers, and GMSL for transmitting meter information to HUD products.

However, when the HUD is required to be played and tested, because the vehicle body domain control system is complex, the GMSL is used for developing and producing the HUD as a signal generator, the cost is high, the serializer development board of the original chip manufacturer is mainly purchased at present, the computer is used for playing and testing the video picture and transmitting the video picture to the serializer development board through the HDMI, and the development board outputs the GMSL signal to the HUD, so the implementation mode has the following problems at present:

1. the development board of the computer and the serializer has high cost, and a test computer is required to be matched independently;

2. the signal transmission link of the development board of the computer and the serializer is long, and the personal computer is generally consumer grade, cannot meet the requirements of the vehicle rule grade, and can interfere with HUD products when EMC test is carried out;

3. the image display brightness and the display height of the HUD product are mainly adjusted through the CAN signal communication of the vehicle body, so that a transceiver for converting a USB signal into a CAN signal and upper computer software for sending CAN instructions are also required to be added to the computer plus serial development board;

4. the display screen conventionally used in HUD products is 1.8 inch, 2.6 inch, 3.1 inch, 4.1 inches, for example, the resolution of the display screen of 1.8 inch is 240 x 480 of low resolution, and the test computer often encounters that the resolution of the compressed image output by the integrated display card is not up to the requirement, so that unstable flickering of the image displayed by the HUD occurs.

Disclosure of Invention

The utility model provides a GMSL signal generator for HUD test, which aims at the problems existing in the prior art.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

a GMSL signal generator for HUD testing, comprising:

HUD；

the MCU main control module is used for controlling the operation of the computer,

the input end of the GMSL serializer is electrically connected with the corresponding output end of the MCU main control module, and the output end of the GMSL serializer is electrically connected with the HUD through a coaxial signal line or a twisted pair signal line;

when the MCU main control module works, a test picture signal is output and is output to the GMSL serializer in a video format of RGB888, and the GMSL serializer converts the received parallel video signal into a serial GMSL format signal and outputs the serial GMSL format signal to the HUD.

Preferably, the GMSL signal generator further comprises a CAN bus transceiver, an input end of the CAN bus transceiver is electrically connected with an output end corresponding to the MCU main control module, and an output end corresponding to the CAN bus transceiver is connected with an input end of the HUD.

Preferably, the GMSL signal generator further includes a FLASH storage, the FLASH storage is set to be a W25Q256 chip, and an input end and an output end corresponding to the W25Q256 chip are electrically connected with a corresponding input end and an output end of the MCU main control module.

Preferably, the MCU master control module is set as an RT1064 micro-control chip.

Preferably, the GMSL serializer is set to a MAX9275 chip.

Preferably, the CAN bus transceiver is set as a TJA1043 chip.

Preferably, the GMSL signal generator further comprises a power management module, and the power management module is respectively used for providing working voltages for the RT1064 micro-control chip, the MAX9275 chip, the TJA1043 chip and the W25Q256 chip.

Preferably, a KEY SW KEY is further connected to the corresponding input end of the MCU main control module.

The technical scheme of the utility model has the following beneficial effects:

(1) When the GMSL signal generator is powered on and started, the MCU main control module invokes a test picture from a program and outputs the test picture to the GMSL serializer in a RGB888 video format, the GMSL serializer receives parallel video signals and converts the parallel video signals into serial GMSL format signals, the serial GMSL format signals are output to the HUD through a coaxial signal line or a twisted pair signal line, the GMSL deserializer of the HUD demodulates the signals after receiving the signals sent by the serializer, and the signals are restored into RGB888 video signals to the PGU of the HUD to generate images, so the design mode of the GMSL signal generator is simple in design and low in cost;

(2) The MCU main control module of the GMSL signal generator CAN send CAN instructions to the CAN transceiver through the serial port according to the CAN protocol, the CAN transceiver converts the CAN instructions into differential signals according to the CAN protocol and sends the differential signals to the CAN bus, and the CAN transceiver of the HUD product receives the CAN signals from the bus, so that the GMSL signal generator integrates the CAN communication function, is an integrated signal source, does not need other equipment such as an external computer, CAN output GMSL test signals after being powered on and started, and CAN meet EMC test requirements;

(3) According to the utility model, the test pictures with different resolutions can be stored through the W25Q256 chip, and the test pictures are switched by using the key SW key to adapt to HUD products with different resolutions (for example, the resolution of a 1.8 inch screen is 240 x 480, and the resolution of a 3.1 inch screen is 480 x 800).

Drawings

FIG. 1 is a schematic block diagram of the present utility model;

fig. 2 is a schematic diagram of a GMSL signal generator and HUD signal processing block of the present utility model;

fig. 3 is a schematic block diagram of another embodiment of the present utility model.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, a first feature is "on" or "to a second feature unless explicitly specified and defined otherwise

"under" may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact by another feature therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

Referring to fig. 1, a GMSL signal generator for HUD test according to the present utility model includes:

HUD；

Referring to fig. 2, in this embodiment, the GMSL signal generator further includes a CAN bus transceiver, an input end of the CAN bus transceiver is electrically connected to an output end corresponding to the MCU main control module, and an output end corresponding to the CAN bus transceiver is connected to an input end of the HUD;

the MCU main control module of the GMSL signal generator CAN send CAN instructions to the CAN transceiver through the serial port according to a CAN protocol, the CAN transceiver converts the CAN instructions into differential signals according to the CAN protocol and sends the differential signals to the CAN bus, the CAN transceiver of the HUD product receives the CAN signals from the bus, then the CAN transceiver of the HUD product receives the CAN signals from the bus and converts the CAN signals into serial port data to the MCU of the HUD product, and the MCU analyzes and then executes the CAN instructions.

Referring to fig. 1 and 3, in this embodiment, the GMSL signal generator further includes a FLASH storage, the FLASH storage is set to be a W25Q256 chip, an input end and an output end corresponding to the W25Q256 chip are electrically connected to a corresponding input end and an output end of the MCU master control module, the MCU master control module is set to be an RT1064 micro-control chip, the GMSL serializer is set to be an MAX9275 chip, the CAN bus transceiver is set to be a TJA1043 chip, the GMSL signal generator further includes a power management module, the power management module is respectively configured to provide working voltages for the RT1064 micro-control chip, the MAX9275 chip, the TJA1043 chip, and the FLASH chip, and the corresponding input end of the MCU master control module is further connected to a KEY SW KEY;

the power management module comprises a power supply DC12V, LDO (L7805), an LDO chip (AMS 1117-3.3), a DC/DC chip (TPS 54240) and a power supply chip LDO (AMS 1117-1.8); the output end of the power supply DC12V is respectively and electrically connected with the input end of a corresponding LDO (L7805) and the input end of a DC/DC chip (TPS 54240), and the output end of the LDO (L7805) and the output end of the DC/DC chip (TPS 54240) are respectively and electrically connected with the input end of a corresponding LDO chip (AMS 1117-3.3) and the input end of an LDO (AMS 1117-1.8);

the power supply chip LDO (L7805) is used for providing a 5V working power supply for the CAN transceiver chip TJA1043, the LDO chip (AMS 1117-3.3) is used for providing a 3.3V working power supply in a low power consumption mode for the RT1064 micro-control chip, the DC/DC chip (TPS 54240) is used for providing a 3.3V working power supply for the RT1064 micro-control chip and the W25Q256 chip, and the power supply chip LDO (AMS 1117-1.8) is used for providing a 1.8V working power supply for the serializer MAX9275 chip.

In addition, the FLASH chip is used for storing test pictures with different resolutions, and the key SW key is used for switching the test pictures to adapt to HUD products with different resolutions.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims

1. A GMSL signal generator for HUD testing, comprising:

HUD；

an MCU main control module;

2. The GMSL signal generator for HUD testing according to claim 1, further comprising a CAN bus transceiver, wherein an input of the CAN bus transceiver is electrically connected to an output of the MCU host module, and wherein an output of the CAN bus transceiver is connected to an input of the HUD.

3. The GMSL signal generator for HUD testing according to claim 1, further comprising a FLASH memory, wherein the FLASH memory is configured as a W25Q256 chip, and an input end and an output end corresponding to the W25Q256 chip are electrically connected to corresponding input ends and output ends of the MCU host module.

4. A GMSL signal generator for HUD testing according to claim 3, wherein the MCU master control module is set as an RT1064 micro-control chip.

5. The GMSL signal generator for HUD testing of claim 4, wherein the GMSL serializer is configured as a MAX9275 chip.

6. A GMSL signal generator for HUD testing according to claim 2, wherein the CAN bus transceiver is provided as a TJA1043 chip.

7. The GMSL signal generator for HUD testing according to claim 1, further comprising a power management module for providing operating voltages to the RT1064 micro-control chip, the MAX9275 chip, the TJA1043 chip, and the W25Q256 chip, respectively.

8. The GMSL signal generator for HUD testing according to claim 1, wherein a KEY SW KEY is further connected to a corresponding input end of the MCU main control module.