W-HUD circuit board

Abstract

This utility model relates to the field of HUD circuit board technology, and discloses a W-HUD circuit board, including: a main circuit board, a CAN communication module, an MCU module, a power supply module, a video processing module, a backlight drive module, and a motor drive module; the main circuit board includes an upper surface, on which the CAN communication module, MCU module, power supply module, video processing module, backlight drive module, and motor drive module are all mounted; the MCU module is connected to the CAN communication module, power supply module, video processing module, backlight drive module, and motor drive module respectively. By concentrating the various modules on the W-HUD circuit board on the upper surface of the main circuit board, the modules are arranged compactly, meeting the miniaturization design requirements of the W-HUD circuit board.

Description

Technical Field

[0001] This utility model relates to the field of HUD circuit board technology, specifically to a W-HUD circuit board. Background Technology

[0002] With the rapid development of intelligent vehicles, more and more cars will be equipped with W-HUD (Windshield HUD). W-HUD is a technology that projects driving information onto the windshield of a car, allowing drivers to view key data such as vehicle speed, navigation, and speed limit reminders without looking down, greatly improving safety.

[0003] However, existing W-HUD circuit boards have complex structures, with various modules and electronic components scattered across both sides, resulting in a large size. Furthermore, because the modules and electrical components arranged on both sides cannot be compressed during installation, they occupy too much space in the front of the driver's seat, significantly reducing the installation space for other components. Utility Model Content

[0004] This utility model discloses a W-HUD circuit board, the purpose of which is to at least solve one of the technical problems existing in the prior art.

[0005] This utility model provides a W-HUD circuit board, including: a circuit main board, a CAN communication module, an MCU module, a power supply module, a video processing module, a backlight driving module, and a motor driving module; the circuit main board includes an upper surface, and the CAN communication module, the MCU module, the power supply module, the video processing module, the backlight driving module, and the motor driving module are all mounted on the upper surface; the MCU module is connected to the CAN communication module, the power supply module, the video processing module, the backlight driving module, and the motor driving module respectively; the power supply module is used to supply power to the CAN communication module, the MCU module, the video processing module, the backlight driving module, and the motor driving module; the backlight driving module is used to drive an external backlight module for backlight display; the motor driving module is used to drive an external motor to rotate, thereby adjusting the movement of the video signal output by the video processing module.

[0006] Furthermore, the MCU module is connected to the CAN communication module, the power supply module, the video processing module, the backlight drive module, and the motor drive module via wires inside the circuit board.

[0007] Furthermore, the power supply module, the MCU module, and the motor drive module are arranged sequentially along the first direction.

[0008] Furthermore, the video processing module and the backlight driving module are arranged sequentially along the first direction, and the video processing module is arranged on the side of the MCU module along the second direction, which is perpendicular to the first direction.

[0009] Furthermore, the video processing module includes a coaxial connector, a deserializer module, and a distortion correction module connected in sequence. The coaxial connector is used to connect to an external vehicle-mounted system and receive video signals. The deserializer module is used to perform data conversion on the video signals. The distortion correction module is used to receive the data-converted video signals, perform distortion correction on the video signals, and then project them onto an external display screen.

[0010] Furthermore, the power module includes a power input port, a power filtering module, a high-side switch interface, a first LDO chip, a second LDO chip, a first DC-DC chip, and a second DC-DC chip. One end of the power filtering module is connected to the power input port, and the other end is connected to the high-side switch interface, the first LDO chip, the second LDO chip, the first DC-DC chip, and the second DC-DC chip, respectively. The power input port is used to receive power from an external source and transmit it to the power filtering module, and the power filtering module is used to filter the received power.

[0011] Furthermore, the power filtering module includes a TVS diode, a capacitor, a reverse connection protection circuit module, a common mode inductor, and a Π-type filter module connected in sequence. The other end of the TVS diode is connected to the power input port, and the output end of the Π-type filter module is connected to the high-side switch interface, the first LDO chip, the second LDO chip, the first DC-DC chip, and the second DC-DC chip, respectively. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the W-HUD circuit board provided by this utility model;

[0013] Figure 2 This is a connection diagram of the W-HUD circuit board provided by this utility model;

[0014] Figure 3 A schematic diagram of the structure of the video processing module provided by this utility model;

[0015] Figure 4 A schematic diagram of the power module provided by this utility model;

[0016] Figure 5 A schematic diagram of the power filtering module provided by this utility model. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0018] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] The lens module provided in the embodiments of this application will be further described in detail below with reference to the accompanying drawings.

[0021] In this embodiment, as Figure 1 As shown in the figure, this utility model embodiment proposes a W-HUD circuit board, which includes a main circuit board 10, a CAN communication module 20, an MCU module 30, a power supply module 40, a video processing module 50, a backlight drive module 60, and a motor drive module 70. The main circuit board 10 includes an upper surface 11, on which the CAN communication module 20, MCU module 30, power supply module 40, video processing module 50, backlight drive module 60, and motor drive module 70 are all mounted. Compared to setting modules and electronic components on both sides of the main circuit board 10, by concentrating the various modules on the W-HUD circuit board on the upper surface 11 of the main circuit board 10, the modules are arranged compactly. At the same time, the lower surface of the main circuit board 10 is left empty, making it easier to mount the lower surface of the main circuit board 10 onto other structures and preventing the W-HUD circuit board from occupying too much space at the front of the driver's seat of the car.

[0022] Specifically, the MCU module 30 is connected to the CAN communication module 20, power supply module 40, video processing module 50, backlight driver module 60, and motor driver module 70. It should be noted that the MCU module 30 is the microcontroller unit on the W-HUD circuit board, the core control component, responsible for processing data, driving the display, coordinating the work of various modules, and ensuring the real-time performance and accuracy of information. Specifically, the MCU module 30 implements intelligent control and data processing with other modules, communicating with the registers of each module via I2C or SPI lines, modifying the registered parameters to meet user control requirements, issuing control signals to control the opening and closing of each module, and detecting interrupt signals from each module to determine whether each module is operating normally, etc.

[0023] like Figure 2 As shown, one end of the CAN communication module 20 is connected to an external CAN bus, and the other end is connected to the MCU module 30. The CAN communication module 20 acts as a signal converter between the CAN bus and the MCU module 30. It is mainly responsible for sending, receiving and filtering data frames. It can convert the digital signal output by the MCU module 30 into the physical signal required by the CAN bus at a rate of 5Mbps, and convert the received physical signal into a digital signal.

[0024] One end of the power module 40 is connected to an external power source, and the other end is connected to the MCU module 30. The power module 40 supplies power to the CAN communication module 20, MCU module 30, video processing module 50, backlight driver module 60, and motor driver module 70 through an external power source, providing the voltage required for each module to operate.

[0025] The backlight driver module 60 is connected to an external backlight module at one end and to the MCU module 30 at the other end. The backlight driver module 60 receives signal commands from the MCU module 30 and drives the external backlight module for backlight display. Specifically, the backlight driver module 60 controls the brightness of the backlight module by controlling the output current to adapt to different ambient light conditions, improving the adaptability of the W-HUD circuit board and ensuring clear W-HUD imaging.

[0026] One end of the motor drive module 70 is connected to an external motor, and the other end is connected to the MCU module 30. The motor drive module 70 receives signal commands from the MCU module 30 and drives the external motor to rotate, thereby moving the video signal output by the video processing module 50, i.e., adjusting the image generated by the video signal output by the video processing module 50 on the display screen. The motor drive module 70 controls the forward and reverse rotation of the motor to control the movement of the video signal. Its application scenarios include moving the video from the driver's blind spot to the center of their field of vision, and returning the video from the center of the driver's field of vision after the vehicle is turned off. This allows it to adapt to drivers of different heights, ensuring that the image projected by the W-HUD appears precisely within the driver's desired field of vision.

[0027] The video processing module 50 is connected to the vehicle's infotainment system on one end and to the MCU module 30 on the other. Video signals from the vehicle's infotainment system are transmitted to the video processing module 50. After receiving signal instructions from the MCU module 30, the video processing module 50 processes and corrects the video signals, and finally projects them onto an external display screen. The display screen refers to the car's windshield.

[0028] In one embodiment, the MCU module 30 is connected to the CAN communication module 20, power supply module 40, video processing module 50, backlight drive module 60, and motor drive module 70 via wires inside the circuit board 10. That is, the wires connecting the CAN communication module 20, power supply module 40, video processing module 50, backlight drive module 60, and motor drive module 70 to the MCU module 30 are hidden within the circuit board 10, ensuring stable connections between modules and preventing damage to the wires during installation, thus improving the quality and lifespan of the W-HUD circuit board.

[0029] In one embodiment, please refer again Figure 1 The power supply module 40, MCU module 30, and motor drive module 70 are arranged sequentially along the first direction (X direction). By arranging the power supply module 40, MCU module 30, and motor drive module 70 along the first direction, the three modules are compactly arranged, shortening the connection distance between them and meeting the requirements of miniaturization design.

[0030] In one embodiment, the video processing module 50 and the backlight driving module 60 are arranged sequentially along a first direction, and the video processing module 50 is positioned on the side of the MCU module 30 along a second direction (Y direction), which is perpendicular to the first direction. By also arranging the video processing module 50 and the backlight driving module 60 along the first direction, the two modules are arranged compactly, shortening the connection distance between them and meeting the requirements of miniaturization design. Simultaneously, arranging the video processing module 50 and the backlight driving module 60 in two rows with the power module 40, the MCU module 30, and the motor driving module 70 makes the modules on the W-HUD circuit board more compact, improving the aesthetics of the W-HUD circuit board.

[0031] In one embodiment, such as Figure 3 As shown, the video processing module 50 includes a coaxial connector 51, a deserializer module 52, and a distortion correction module 53 connected in sequence. The coaxial connector 51 is used to connect to an external vehicle infotainment system and receive video signals. The deserializer module 52 is used to convert the data format of the input video signal. The distortion correction module 53 is used to receive the video signal after data format conversion, correct the distortion of the video signal, and then transmit it to an external display screen. Specifically, the video signal source is the vehicle infotainment system, which can be a central control system or a domain controller. The video signal contains the content to be displayed. The video signal is transmitted to the deserializer module 52 in the video processing module 50 through the coaxial connector 51. The deserializer module 52 decodes the video signal, that is, it converts the video signal from high-speed serial interface data into four low-voltage differential signaling (LVDS) data and one LVDS clock pair (FPD-Link). After data conversion, the video signal enters the distortion correction module 53. The distortion correction module 53 performs distortion processing on the relevant image data, supporting functions such as moving, rotating, cropping, enlarging, and shrinking the image at any position to meet the output display requirements of W-HUD. After distortion correction processing is completed, the video signal is transmitted and projected onto an external display screen for display.

[0032] In one embodiment, such as Figure 4As shown, the power module 40 includes a power input port 41, a power filtering module 42, a high-side switch interface 43, a first LDO chip 44, a second LDO chip 45, a first DC-DC chip 46, and a second DC-DC chip 47. One end of the power filtering module 42 is connected to the power input port 41, and the other end is connected to the high-side switch interface 43, the first LDO chip 44, the second LDO chip 45, and the first DC-DC chip 46, respectively. The second DC-DC chip 47 is connected to the first DC-DC chip 46. The power input port 41 is used to receive power from an external source and transmit it to the power filtering module 42, which is used to filter the received power. It should be noted that an LDO chip (Low Dropout Regulator) is an integrated circuit used for power management, capable of converting an input voltage into a stable, lower-value output voltage, and has low requirements for the input / output voltage difference. A DC-DC chip (DCDC Converter) is a switching power management chip used to efficiently convert a DC input voltage into different DC output voltages (boost, buck, or buck-boost). Compared to LDO chips, DC-DC chips offer higher efficiency and higher current output capability, but also generate more noise, making them suitable for power-sensitive applications. Therefore, in this embodiment, different chips are designed in the power module 40 to control the power supply voltage according to the needs of different modules, ensuring that each module operates normally and efficiently.

[0033] Power supplied by an external power source enters the power module 40 through the power input port 41. It then undergoes filtering by the power filter module 42 to remove external interference before being supplied to each module, thus protecting them. Considering the different voltage requirements of each module, a high-side switch interface 43, a first LDO chip 44, a second LDO chip 45, a first DC-DC chip 46, and a second DC-DC chip 47 are designed to control and regulate the voltage of each module. Specifically, the high-side switch interface 43 controls the power requirements of the backlight drive module 60 and the motor drive module 70; the first LDO chip 44 controls the power requirements of the MCU module 30; the second LDO chip 45 controls the power requirements of the CAN communication module 20; and the first DC-DC chip 46 and the second DC-DC chip 47 work together to control the power requirements of the video processing module 50. Furthermore, the activation and deactivation of the first DC-DC chip 46 and the second DC-DC chip 47 are controlled by the MCU module 30. For example, the 12V power supply after passing through the power filter module 42 is divided into four paths. The first path supplies power to the backlight driver module 60 and the motor driver module 70 via the high-side switch interface 43, which is controlled by the MCU module 30. The second path, after being stepped down by the first LDO chip 44, provides 3.3V power for the operation of the MCU module 30. The third path, after being stepped down by the second LDO chip 45, provides 5V power for the operation of the CAN communication module 20. The fourth path, first controlled by the first DC-DC chip 46, steps down the power supply to 3.3V and supplies power to the deserializer module 52 and the distortion correction module 53. Since the distortion correction module 53 requires more than 3.3V power, the power supply to the distortion correction module 53 is then controlled by the second DC-DC chip 47, which steps down the power supply from 3.3V to 1.2V to supply the distortion correction module 53.

[0034] In one embodiment, such as Figure 5As shown, the power supply filtering module 42 includes a TVS diode 421, a capacitor 422, a reverse connection protection circuit module 423, a common-mode inductor 424, and a Π-type filter module 425 connected in sequence. One end of the TVS diode 421 is connected to the capacitor 422, and the other end of the TVS diode 421 is connected to the power input port 41. The output terminal of the Π-type filter module 425 is connected to the high-side switch interface 43, the first LDO chip 44, the second LDO chip 45, and the first DC-DC chip 46, respectively. It should be noted that the TVS diode 421 is a transient voltage suppressor diode, a semiconductor device used to protect circuits from damage caused by transient high voltage. It can clamp abnormal high voltage to a safe level within nanoseconds, protecting sensitive electronic components. Optionally, the reverse connection protection circuit module 423 can adopt any one of the following: a series diode scheme, a parallel diode scheme, or a MOSFET reverse connection protection scheme. The Π-type filter module 425 uses a combination of filter capacitors and inductors to achieve LC-type filtering, resulting in good high-frequency filtering performance, low DC loss, and further filtering out high-frequency interference in the power supply.

[0035] The power supply from the power input port 41 first passes through a TVS diode 421, then through a capacitor 422 for filtering to remove high-frequency and low-frequency components. It then passes through a reverse connection protection circuit module 423 and enters a common-mode inductor 424 to filter out common-mode interference. Finally, it enters a Π-type filter module 425 for secondary filtering. The conduction voltage of the TVS diode 421 can be selected between 24-30V. When the W-HUD is first turned on or when the external power supply is subjected to strong interference, the input external power supply voltage will fluctuate instantaneously, resulting in high-frequency and high-voltage interference. The function of the TVS diode 421 is to intercept this high-voltage energy. The capacitor 422 acts as a primary filter to remove high-frequency and low-frequency components from the power supply. The reverse connection protection circuit module 423 prevents the positive and negative terminals of the power supply from being reversed, which could short-circuit and burn out the electronic components in the W-HUD circuit board.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A W-HUD circuit board, characterized in that, include: Circuit board, CAN communication module, MCU module, power supply module, video processing module, backlight driver module and motor driver module; The circuit board includes an upper surface, on which the CAN communication module, the MCU module, the power module, the video processing module, the backlight drive module, and the motor drive module are all mounted. The MCU module is connected to the CAN communication module, the power supply module, the video processing module, the backlight drive module, and the motor drive module, respectively. The power supply module is used to supply power to the CAN communication module, the MCU module, the video processing module, the backlight drive module, and the motor drive module; The backlight driver module is used to drive an external backlight module for backlight display. The motor drive module is used to drive an external motor to rotate, thereby moving the video signal output by the video processing module.

2. The W-HUD circuit board according to claim 1, characterized in that, The MCU module is connected to the CAN communication module, the power supply module, the video processing module, the backlight drive module, and the motor drive module via wires inside the circuit board.

3. The W-HUD circuit board according to claim 1, characterized in that, The power supply module, the MCU module, and the motor drive module are arranged sequentially along the first direction.

4. The W-HUD circuit board according to claim 3, characterized in that, The video processing module and the backlight driving module are arranged sequentially along the first direction, and the video processing module is arranged on the side of the MCU module along the second direction, which is perpendicular to the first direction.

5. The W-HUD circuit board according to claim 1, characterized in that, The video processing module includes a coaxial connector, a deserializer module, and a distortion correction module connected in sequence. The coaxial connector is used to connect to an external vehicle-mounted system and receive video signals. The deserializer module is used to convert the data format of the input video signal. The distortion correction module is used to receive the video signal after data format conversion, correct the distortion of the video signal, and then project it onto an external display screen.

6. The W-HUD circuit board according to claim 1, characterized in that, The power module includes a power input port, a power filtering module, a high-side switch interface, a first LDO chip, a second LDO chip, a first DC-DC chip, and a second DC-DC chip. One end of the power filtering module is connected to the power input port, and the other end is connected to the high-side switch interface, the first LDO chip, the second LDO chip, and the first DC-DC chip, respectively. The second DC-DC chip is connected to the first DC-DC chip. The power input port is used to receive power from an external source and transmit it to the power filtering module. The power filtering module is used to filter the received power.

7. The W-HUD circuit board according to claim 6, characterized in that, The power filtering module includes a TVS diode, a capacitor, a reverse connection protection circuit module, a common mode inductor, and a Π-type filter module connected in sequence. The other end of the TVS diode is connected to the power input port. The output end of the Π-type filter module (425) is connected to the high-side switch interface, the first LDO chip, the second LDO chip, and the first DC-DC chip, respectively.

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