Vehicle HUD PGU display driving system and method

Abstract

The invention provides a vehicle HUD PGU display driving system and method, and relates to the technical field of automobile intelligent cabin display. The system comprises a deserializer module which is used for receiving a serial signal input by an IVI end, deserializing an image signal in the serial signal into an image signal which can be received and displayed by an LED display module, deserializing local backlight original data in the image signal, and forwarding the local backlight original data to an MCU module; the MCU module is used for processing the local backlight original data through a preset lightweight decision algorithm and then generating a control signal; the LED driving module is used for controlling backlight partition lightening and brightness adjustment of the LED display module based on the LED lightening control signal and the LED brightness control signal; and the LED display module is used for performing partition display based on the control signal sent by the LED driving module. Backlight partition and even single-point lighting control are achieved, and the light window problem existing in an existing DLP, an existing LCOS and an existing common global dimming TFT-LCD PGU is solved.

Description

Technical Field

[0001] The present invention relates to the field of automobile intelligent cockpit display technology, and in particular to a vehicle HUD PGU display driving system and method. Background Art

[0002] With the rise and development of the smart cockpit concept in automobiles, HUD (Head-Up Display) technology, with its unique advantages, has become a key component of the smart cockpit. HUD technology uses its core component, the Picture Generation Unit (PGU), to project key data such as driving information, navigation instructions, and safety warnings directly onto the windshield in front of the driver, creating a virtual display layer. Currently, HUD PGU display driver technologies primarily include TFT-LCD, DLP, and LCOS. DLP utilizes a DMD (Digital Micromirror Device) with hundreds of thousands of ultra-micro lenses to project strong light sources after calculation and reflection by a digital system. However, this technology is patented by Texas Instruments and is relatively expensive. LCoS is a reflective liquid crystal on silicon (LCoS) display driver technology that reflects strong light sources to create images. Implemented using integrated circuit technology, it requires highly integrated circuits and display components. LCOS panels are relatively expensive and have low yield rates. TFT-LCD technology uses a liquid crystal display panel to generate images, illuminated by a backlight to achieve rich color. The TFT-LCD PGU offers excellent brightness, contrast, and resolution, meeting the requirements of most driving scenarios.

[0003] In reality, there are two main types of TFT-LCD PGU display drivers: one uses global dimming with ordinary backlight, in which all backlight lamps are controlled uniformly, and can only adjust the brightness of the entire TFT screen. The virtual image presented to the driver will have obvious light windows, which is particularly noticeable when driving at night. In addition, its image contrast, dynamic range and energy utilization are generally low. The other type uses Mini LED to achieve partition control through FPGA or TCON IC. Its hardware is complex, mass production is difficult, the software algorithm workload is large, and the investment cost is high. It is necessary to improve the display driver module circuit of the HUD PGU to obtain a display driver circuit system with a simple circuit structure, low cost, easy mass production, and the ability to achieve partition backlight control and even precise control of individual lamp beads.

[0004] Based on this, the existing technology has the following technical problems: (1) DLP PGU and LCOS PGU adopt DMD (digital micromirror chip) technology and silicon-based liquid crystal technology. First of all, both PGU solutions are reflective and need to reflect the light of the constant light source. As a result, there will be obvious light windows at the imaging end (such asFigure 1 (As shown), especially at night, the presence of light windows can affect the driver's vision. Furthermore, both PGU solutions utilize micron-level precision manufacturing processes, which incurs high R&D and investment costs. Furthermore, DLP is a patented technology from Texas Instruments in the United States, creating a technological monopoly, and LCOS has a relatively low yield rate.

[0005] (2) TFT-LCD PGU adopts the global dimming solution of ordinary backlight. When displaying the picture, all the LED lamp beads of the backlight panel must be lit, and there will also be a light window in the imaging area (such as Figure 1 (as shown). Global dimming also has low image contrast and dynamic range, relatively high power consumption, and low energy utilization. TFT-LCD PGUs use Miniled to implement partition control via FPGA or TCON IC. While local dimming is possible, both solutions require dedicated FPGA and TCON chips in addition to LED driver chips. Each chip also requires a suitable power supply chip, making the entire hardware solution more complex, the software algorithm workload large, and the investment cost high. FPGAs also require professional engineers to develop, making mass production difficult. Furthermore, TFT-LCD PGUs use Mini LEDs as backlight sources. Their micron-level light-emitting units require complex design processes, resulting in high costs and low yields. Software algorithms and hardware collaboration are also required, increasing system complexity.

[0006] The above problems are in urgent need of resolution. Summary of the Invention

[0007] The purpose of the present invention is to overcome at least one technical problem existing in the prior art and to provide a vehicle HUD PGU display driving system and method.

[0008] On the one hand, an embodiment of the present invention provides a vehicle HUD PGU display driving system, which includes: an IVI end, a deserializer module, an MCU module, an LED driver module and an LED display module; the IVI end is used to send a serial signal consisting of an image signal and local backlight raw data generated based on the image signal; the deserializer module is used to receive the serial signal input by the IVI end, and deserialize the image signal therein into an image signal that the LED display module can receive and display, and at the same time deserialize the local backlight raw data therein and forward it to the MCU module; the MCU module is used to generate a control signal after processing the local backlight raw data through a preset lightweight decision algorithm, and the control signal includes an LED lighting control signal and an LED brightness control signal; the LED driver module is used to control the backlight partition lighting and brightness adjustment of the LED display module based on the LED lighting control signal and the LED brightness control signal; the LED display module is used to perform partition display based on the control signal sent by the LED driver module.

[0009] Furthermore, the IVI end is integrated with an image partition mapping module, a brightness feature extraction module and a first signal output module; the image partition mapping module is used to divide the image to be displayed into N grid partitions, each partition corresponding to the physical area of ​​the LED display module; the brightness feature extraction module is used to calculate the maximum grayscale value, average grayscale value and effective pixel ratio for each image partition; the first signal output module is used to encapsulate the maximum grayscale value, average grayscale value and effective pixel ratio of each image partition into a data packet corresponding to the image partition, and combine the data packets corresponding to the N image partitions as local backlight original data.

[0010] Furthermore, the deserializer module is used to separate the serial signal consisting of the image signal and the local backlight raw data generated based on the image signal based on the built-in deserializer; directly convert the image signal into LVDS format and transmit it to the backlight panel of the LED display module to drive the display; reorganize the local backlight raw data generated according to the image signal into the IIC communication protocol format, and transmit it to the MCU module in real time through the IIC bus.

[0011] Furthermore, the MCU module integrates a data analysis module, a dynamic switch decision module, a PWM brightness calculation module and a second signal output module; the data analysis module is used to analyze the local backlight raw data to obtain the maximum grayscale value, average grayscale value and effective pixel ratio corresponding to each partition image; the dynamic switch decision module is used to determine whether to trigger the lighting instruction based on the effective pixel ratio; the PWM brightness calculation module is used to calculate the basic brightness based on the maximum grayscale value and the average grayscale value, and dynamically adjust the basic brightness based on the ambient light compensation formula to obtain the final brightness; the second signal output module is used to output a control signal including the partition number, LED switch status and PWM duty cycle, and send it to the LED driver module via the SPI bus.

[0012] Furthermore, the basic brightness calculation formula is: ; The ambient light compensation formula is: ; Where, is the preset weight value, is the preset light intensity coefficient.

[0013] Furthermore, the system also includes an LED power driver module for converting the high voltage input to the system into the low voltage required by the LED driver module and the LED display module. The low voltage is controlled by the LED driver module to power each partition of the LED display module.

[0014] Furthermore, the system also includes a power system for outputting two low-voltage power supply lines and one high-voltage power supply line, wherein the two low-voltage power supply lines respectively power the MCU module and the deserializer module, and the one high-voltage power supply line powers the LED power driver module.

[0015] Furthermore, the LED display module structure adopts a general LED as a backlight panel of a TFT display screen and is designed with N partitions.

[0016] Furthermore, the N partitions of the LED display module are independently controlled partitions, and the N partitions are independently dynamically dimmed, and the lighting and shutting of the lamp beads in each partition are controlled accordingly according to the image display conditions of the TFT display screen.

[0017] In the second aspect, an embodiment of the present invention provides a vehicle HUD PGU display driving method, which is applied to the above-mentioned vehicle HUD PGU display driving system, and the method includes: sending a serial signal consisting of an image signal and local backlight raw data generated based on the image signal through the IVI end; receiving the serial signal input from the IVI end through the deserializer module, and deserializing the image signal therein into an image signal that can be received and displayed by the LED display module, and at the same time forwarding the local backlight raw data therein after deserialization to the MCU module; the MCU module processes the local backlight raw data through a preset lightweight decision algorithm to generate a control signal, and the control signal includes an LED lighting control signal and an LED brightness control signal; the LED display module backlight partition lighting and brightness adjustment are controlled by the LED driver module based on the LED lighting control signal and the LED brightness control signal; the LED display module performs partition display based on the control signal sent by the LED driver module.

[0018] On the other hand, the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores one or more instructions, and the computer instructions are used to enable the computer to execute the above-mentioned vehicle HUDPGU display driving method.

[0019] On the other hand, the present invention provides an electronic device comprising: a memory and a processor; the memory stores at least one program instruction; the processor implements the above-mentioned vehicle HUD PGU display driving method by loading and executing the at least one program instruction.

[0020] The beneficial effects of the present invention are: (1) Solve the light window problem: By increasing the backlight partition and using LED with Local Dimming, partition or even single-point lighting control can be achieved, so that only key image information is displayed in the imaging area, and the backlight is turned off in the non-image area, which will not interfere with the driver's vision at night.

[0021] (2) Improved display effect: The image contrast and dynamic range are improved, with brightness reaching 3000 nit, minimum brightness 0.0001 nit, and contrast ratio 1500000:1, which is better than existing solutions.

[0022] (3) Reduce cost and complexity: Use conventional LEDs for multi-zone backlighting, which has a mature and stable process and low cost. No FPGA chip or TCON chip and corresponding power chip are required, the drive control scheme is simple, the workload of software algorithms is reduced, R&D and hardware costs are reduced, and mass production is easy.

[0023] (4) Energy saving: local lighting is achieved, consuming energy only in the illuminated area, reducing power consumption and improving energy utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings and examples.

[0025] Figure 1 It is a schematic diagram of the light window of PUG global dimming in the technical solution described in the background technology of the present invention.

[0026] Figure 2 This is a structural diagram of a vehicle HUD PGU display drive system provided in Example 1 of the present invention.

[0027] Figure 3 This is a structural diagram of another vehicle HUD PGU display drive system provided in Example 1 of the present invention.

[0028] Figure 4 This is a structural diagram of the Mini LED drive system using the FPGA solution described in the background technology of the present invention.

[0029] Figure 5 This is a structural diagram of the Mini LED drive system with the TCON solution described in the background technology of the present invention.

[0030] Figure 6 This is a schematic diagram of a matte window display provided by Example 1 of the present invention.

[0031] Figure 7 This is a flow chart of a vehicle HUD PGU display driving method provided in Example 2 of the present invention.

[0032] Figure 8 This is a partial block diagram of an electronic device provided in Example 4 of the present invention. DETAILED DESCRIPTION

[0033] Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flow charts. Although the flow charts describe the various operations as sequential processes, many of the operations therein can be implemented in parallel, concurrently, or simultaneously. In addition, the order of the various operations can be rearranged. The process can be terminated when its operation is completed, but can also have additional steps not included in the accompanying drawings. The process can correspond to a method, function, procedure, subroutine, subprogram, etc.

[0034] It should be understood that although the terms "first," "second," and the like may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used solely to distinguish one element from another. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element, without departing from the scope of the exemplary embodiments. The term "and / or" as used herein includes any and all combinations of one or more of the listed associated items.

[0035] The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the present invention in a schematic manner, and therefore only shows the components related to the present invention.

[0036] Example 1 To facilitate understanding, before describing the embodiments of the present invention in detail, a brief overview of the operating principles of this system is provided. This embodiment aims to address existing issues such as light window issues, high hardware complexity, high cost, and poor display quality. It provides a vehicle HUD (Head-Up Display) display driver system and method, achieving a simple circuit structure, low cost, easy mass production, and the ability to implement zoned backlight control. The driver system primarily consists of an IVI terminal, a deserializer module, an MCU module, an LED driver module, and an LED display module. Its core principle is to achieve precise display control of the HUD (Head-Up Display) through modular collaboration, while also integrating zoned dynamic dimming technology to improve display quality and energy efficiency. The specific principles are as follows: Based on the linked control of image signals and backlight zones, after receiving external image and dimming raw data, signal processing and algorithm analysis are performed to generate zone control signals, ultimately achieving dynamic lighting and brightness adjustment of the backlight zones to meet the image display requirements of the TFT display. The collaborative principle of each module: Signal reception and processing: The deserializer module receives the image signal and local backlight raw data from the IVI input, converts and processes the image signal to adapt it to the TFT display, and forwards the dimming raw data to the MCU module. Dimming Signal Generation: The MCU module performs algorithmic processing on raw dimming data to generate control signals for LED lighting and brightness, enabling precise backlight control logic. Zoned Backlight Control: Based on the control signals, the LED driver module uses PWM modulation to power each zone of the LED display module, controlling the lighting / off and brightness of each zone. The multi-zone design of the LED display module supports independent dynamic dimming, which can be adjusted based on the TFT display content, illuminating areas with images and dimming areas without images, with brightness matching the image grayscale. Power Supply Adaptation: Voltage conversion and distribution are achieved through the LED power driver module and the power system, providing appropriate voltages for each module and ensuring stable system operation. Communication and Power Supply Support: Inter-module communication utilizes I2C (between the deserializer module and the MCU module) and SPI (between the MCU module and the LED driver module) to ensure efficient signal transmission. The power supply system is divided into low-voltage (3.3V) and high-voltage (12V) to adapt to the power requirements of different modules and ensure coordinated operation. In short, this invention uses the "signal reception-processing-analysis-control" process combined with zoned dynamic dimming technology to make the HUD display more adapted to the image content, improving display quality while reducing energy consumption.

[0037] The specific implementation is as follows: like Figure 2 As shown in the figure, it is a structural diagram of a vehicle HUD PGU display drive system provided by the present invention.

[0038] As an example, the system includes: an IVI end 1, a deserializer module 2, an MCU module 3, an LED driver module 4 and an LED display module 5; the IVI end 1 is used to send a serial signal consisting of an image signal and local backlight raw data generated based on the image signal; the deserializer module 2 is used to receive the serial signal input by the IVI end, and deserialize the image signal therein into an image signal that can be received and displayed by the LED display module 5, and at the same time deserialize the local backlight raw data therein and forward it to the MCU module 3; the MCU module 3 is used to generate a control signal after processing the local backlight raw data through a preset lightweight decision algorithm, and the control signal includes an LED lighting control signal and an LED brightness control signal; the LED driver module 4 is used to control the backlight partition lighting and brightness adjustment of the LED display module 5 based on the LED lighting control signal and the LED brightness control signal; the LED display module 5 is used to perform partition display based on the control signal sent by the LED driver module 4.

[0039] Preferably, the IVI terminal 1 and the deserializer module 2 perform signal transmission via a radio frequency signal connector 6 .

[0040] In some feasible embodiments, the IVI terminal 1 is integrated with an image partition mapping module 10, a brightness feature extraction module 11 and a first signal output module 12; the image partition mapping module 10 is used to divide the image to be displayed into N grid partitions, each partition corresponding to the physical area of ​​the LED display module 5; the brightness feature extraction module 11 is used to calculate the maximum grayscale value, average grayscale value and effective pixel ratio for each image partition; the first signal output module 12 is used to encapsulate the maximum grayscale value, average grayscale value and effective pixel ratio of each image partition into a data packet corresponding to the image partition, and combine the data packets corresponding to the N image partitions as local backlight original data.

[0041] Preferably, the image partition mapping module 10: The IVI terminal 1 divides the image to be displayed (such as navigation arrows or vehicle speedometer) into a number of grid partitions (e.g., a 12×8 grid of 96 partitions), each of which corresponds to the physical area of ​​the backlight panel of the LED display module 5. The brightness feature extraction module 11: Calculates three key parameters for each image partition: maximum grayscale value (the brightness of the brightest pixel in the partition (0-255 levels)); average grayscale value (the average brightness of all pixels in the partition); and effective pixel ratio (the area ratio of non-pure black pixels in the partition). The first signal output module 12: Encapsulates these parameters into binary data packets (each partition occupies 4 bytes), forming a local backlight raw data stream.

[0042] In some feasible embodiments, the deserializer module 2 is used to separate a serial signal consisting of an image signal and local backlight raw data generated based on the image signal based on a built-in deserializer; directly convert the image signal into LVDS format and transmit it to the backlight panel of the LED display module 5 to drive the display; reorganize the local backlight raw data generated according to the image signal into an IIC communication protocol format, and transmit it to the MCU module 3 in real time through the IIC bus.

[0043] Preferably, the deserializer module 2 receives the high-speed serial signal (including image data and local backlight raw data) transmitted by the IVI. The built-in deserializer separates two types of data: the image signal, which is directly converted into LVDS format and transmitted to the TFT panel to drive the display. The local backlight raw data is reorganized into the IIC communication protocol format. Data forwarding: The reorganized local backlight raw data is transmitted to the MCU module 5 in real time via the IIC bus. This single-chip implementation of data separation and protocol conversion eliminates the intermediate FPGA / TCON processing required in traditional solutions.

[0044] In some feasible embodiments, the MCU module 3 integrates a data analysis module 30, a dynamic switch decision module 31, a PWM brightness calculation module 32, and a second signal output module 33; the data analysis module 30 is used to analyze the local backlight raw data to obtain the maximum grayscale value, average grayscale value, and effective pixel ratio corresponding to each partition image; the dynamic switch decision module 31 is used to determine whether to trigger a lighting instruction based on the effective pixel ratio; the PWM brightness calculation module 32 is used to calculate the basic brightness based on the maximum grayscale value and the average grayscale value, and dynamically adjust the basic brightness based on the ambient light compensation formula to obtain the final brightness; the second signal output module 33 is used to output a control signal including the partition number, LED switch status, and PWM duty cycle, and send it to the LED driver module 4 via the SPI bus. Among them, the maximum grayscale value is the brightness of the brightest pixel in the partition, the average grayscale value is the average brightness of all pixels in the partition, and the effective pixel ratio is the area ratio of non-pure black pixels in the partition.

[0045] Preferably, the basic brightness calculation formula is: ; The ambient light compensation formula is: Where, is the preset weight value, is the preset light intensity coefficient. More specifically, Preferably 0.7, Preferably it is 0.005.

[0046] Preferably, the dynamic switch decision includes: if the effective pixel ratio of the partition is greater than 1% (i.e., there is image information), then triggering the lighting instruction; if the background is pure black (effective pixels ≈ 0%), then turning off the power of the partition.

[0047] In some feasible embodiments, combined with Figure 3 As shown, the system also includes an LED power driver module 7 for converting the high voltage input to the system into the low voltage required by the LED driver module 4 and the LED display module 5. The low voltage is controlled by the LED driver module 4 to power the various sections of the LED display module 5. The system also includes a power system 8 for outputting two low-voltage power supply lines and one high-voltage power supply line. The two low-voltage power supply lines respectively power the MCU module 3 and the deserializer module 2, and the one high-voltage power supply line powers the LED power driver module 7.

[0048] Preferably, the power system 8 is divided into two low-voltage power supply lines and one high-voltage power supply line. The two low-voltage 3.3V power supply lines respectively power the MCU module 3 and the deserializer module 2, and the high-voltage 12V power supply line powers the LED power driver module 7. The LED power driver module 7 converts the high-voltage power supply into a low-voltage 3.3V power supply for the LED driver module 4 and the LED display module 5. The LED driver module 4 adjusts the power supply to each LED in the LED display module 5 through PWM.

[0049] Preferably, the power supply end is connected to the power system 8 via a power connector 9 .

[0050] In some feasible embodiments, the LED display module 5 is structured to use general-purpose LEDs as the backlight panel of a TFT display and is designed with N partitions. The N partitions of the LED display module 5 are independently controlled and independently dynamically dimmed, with the lighting and shutoff of the lamp beads in each partition controlled according to the image displayed on the TFT display.

[0051] Combine Figures 3 to 5 As shown, the bottleneck of the traditional solution is that MiniLED relies on FPGA / TCON to process image data in real time, resulting in high computational load, high latency (>5ms), and high cost. However, the innovations of this embodiment include: forward computing power: using the IVI to pre-generate local backlight raw data (redundant computing power for the vehicle computer); lightweight MCU decision-making: only switching judgment and PWM calculation are performed (latency <1ms). While eliminating the FPGA / TCON, it still meets automotive-grade real-time requirements. This significantly reduces the computational load, solves the problem of computing latency, and further reduces production costs.

[0052] Combine Figure 6As shown, it can be seen that by adopting the technical solution described in this embodiment, the cost of conventional LED partition modules is only 1 / 5 of that of MiniLED, achieving a similar visual experience. The partition control can accurately cover the content to be displayed, avoiding the situation of light windows in the display content in the existing technology.

[0053] In order to more specifically explain the technical advantages of this embodiment compared to the prior art, technicians designed comparative experiments and obtained the following implementation data as shown in Table 1: Table 1:

[0054] Specifically, the experimental subjects were: Subject 1: a conventional global backlight automotive HUD PGU display driver system; Subject 2: a MiniLED local dimming automotive HUD PGU display driver system; and Subject 3: an automotive HUD PGU display driver system according to the present invention (LED with local dimming). The experimental equipment included a luminance meter (accuracy: ±0.0001 nit); a power consumption meter (accuracy: ±0.1W); a standard test image source (including full white, full black, and grayscale gradient test images); and a constant temperature test chamber (controlled at 25°C to eliminate the impact of temperature on LED performance). The experimental steps included: Brightness test: Each of the three HUD PGU systems was connected to the same image source and displayed a full white image (maximum brightness scenario). Using a luminance meter, three test points were measured in the center of the system's projected virtual image. The brightness values ​​were recorded and averaged to form the "brightness" parameter for each solution. Minimum brightness test: The image source was switched to a full black image (minimum brightness scenario). Use a luminance meter to take 3 test points in the center area of ​​the same virtual image, record the brightness value and take the average value as the "minimum brightness" parameter of the solution. Contrast calculation: According to the formula "contrast = brightness ÷ minimum brightness", calculate the contrast of the three solutions respectively. Power consumption tests include: Ordinary global backlight solution: Under a completely black screen, use a power consumption tester to measure the real-time power consumption of the system when it is working stably (because the global backlight is always on, this is its typical power consumption). MiniLED Localdimming and the solution of the present invention: When displaying a 50% area image (simulating a medium load scenario), use a power consumption tester to measure the real-time power consumption of the system when it is working stably (only the energy consumption of the lit area).

[0055] It can be seen that the brightness of the present invention can reach at least 3000 nit, which is higher than the 550 nit of ordinary global backlight and even higher than the 1000 nit of MiniLED solution. When displaying a pure black screen, the minimum brightness of the present invention can reach 0.0001 nit, which is almost completely black, far lower than the 0.4 nit of ordinary global backlight solutions and lower than the 0.001 nit of MiniLED solutions. This shows that the light window problem of DLP, LCOS and ordinary global backlight solutions has been solved. The contrast parameter is also better than that of ordinary global backlight solutions and MiniLED solutions. At the same time, it can achieve lower power consumption and be more energy-efficient. Through the above comparison, it can be concluded that the present invention achieves better display effects.

[0056] It is worth noting that all modules involved in this embodiment are logical units. In actual applications, a logical unit can be a physical unit, a part of a physical unit, or a combination of multiple physical units. Furthermore, to highlight the innovations of this invention, this embodiment does not include units that are not closely related to solving the technical problems proposed by this invention. However, this does not mean that other units do not exist in this embodiment.

[0057] Example 2 See also Figure 7 , which is a flow chart of a vehicle HUD PGU display driving method provided by an embodiment of the present invention.

[0058] As an example, the method is applied to the vehicle HUD PGU display drive system described in Example 1, and the method includes: S1. Sending a serial signal consisting of an image signal and local backlight raw data generated based on the image signal through an IVI terminal.

[0059] S2. Receive the serial signal input from the IVI end through the deserializer module, and deserialize the image signal into an image signal that can be received and displayed by the LED display module. At the same time, deserialize the local backlight original data and forward it to the MCU module.

[0060] S3. The MCU module processes the local backlight raw data using a preset lightweight decision algorithm to generate a control signal, where the control signal includes an LED lighting control signal and an LED brightness control signal.

[0061] S4. Controlling the backlight partition lighting and brightness adjustment of the LED display module based on the LED lighting control signal and the LED brightness control signal through the LED driving module.

[0062] S5. The LED display module performs partition display based on the control signal sent by the LED driving module.

[0063] It is not difficult to find that this embodiment is a method example corresponding to the first embodiment, and this embodiment can be implemented in conjunction with the first embodiment. The relevant technical details mentioned in the first embodiment are still valid in this embodiment, and to reduce repetition, they are not repeated here. Accordingly, the relevant technical details mentioned in this embodiment can also be applied to the first embodiment.

[0064] Example 3 An embodiment of the present invention further provides a storage medium storing a method for driving a vehicle HUD PGU display. When executed by a processor, the program for driving the vehicle HUD PGU display implements the steps of the method described above. Because this storage medium incorporates all the technical solutions of all the aforementioned embodiments, it possesses at least all the beneficial effects of the technical solutions of these embodiments, and therefore will not be further elaborated upon here.

[0065] Example 4 See also Figure 8 An embodiment of the present invention further provides an electronic device, comprising: a memory and a processor; the memory stores at least one program instruction; the processor implements the vehicle HUD PGU display driving method provided in Example 2 by loading and executing the at least one program instruction.

[0066] The memory 702 and processor 701 are connected using a bus. The bus can include any number of interconnected buses and bridges, connecting various circuits of one or more processors 701 and memory 702. The bus can also connect various other circuits such as peripheral devices, voltage regulators, and power management circuits. These are all well known in the art and, therefore, are not described further herein. The bus interface provides an interface between the bus and the transceiver. The transceiver can be a single component or multiple components, such as multiple receivers and transmitters, providing a unit for communicating with various other devices over a transmission medium. Data processed by the processor 701 is transmitted over a wireless medium via an antenna. Furthermore, the antenna receives data and transmits it to the processor 701.

[0067] The processor 701 is responsible for managing the bus and general processing, and can also provide various functions, including timing, peripheral interfaces, voltage regulation, power management, and other control functions. The memory 702 can be used to store data used by the processor 701 when performing operations.

[0068] The above is only an embodiment of the present invention. Common knowledge such as the known specific structures and characteristics in the scheme is not described in detail here. Ordinary technicians in the field are aware of all common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all existing technologies in the field, and have the ability to apply conventional experimental means before that date. Ordinary technicians in the field can improve and implement this scheme in combination with their own abilities under the inspiration given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A vehicle HUD PGU display drive system, characterized in that: The system includes: an IVI terminal, a deserializer module, an MCU module, an LED driver module and an LED display module; The IVI terminal is used to send a serial signal consisting of an image signal and local backlight raw data generated based on the image signal; The deserializer module is used to receive the serial signal input from the IVI end, and deserialize the image signal therein into an image signal that can be received and displayed by the LED display module, and at the same time deserialize the local backlight original data therein and forward it to the MCU module; The MCU module is used to generate a control signal after processing the local backlight raw data through a preset lightweight decision algorithm, and the control signal includes an LED lighting control signal and an LED brightness control signal; The LED driving module is used to control the backlight partition lighting and brightness adjustment of the LED display module based on the LED lighting control signal and the LED brightness control signal; The LED display module is used to perform partition display based on the control signal sent by the LED driving module.

2. The vehicle HUD PGU display drive system according to claim 1, characterized in that: The IVI terminal is integrated with an image partition mapping module, a brightness feature extraction module and a first signal output module; The image partition mapping module is used to divide the image to be displayed into N grid partitions, each partition corresponding to the physical area of ​​the LED display module; The brightness feature extraction module is used to calculate the maximum grayscale value, average grayscale value and effective pixel ratio for each image partition; The first signal output module is used to encapsulate the maximum grayscale value, average grayscale value and effective pixel ratio of each image partition into a data packet corresponding to the image partition, and combine the data packets corresponding to N image partitions as local backlight original data.

3. The vehicle HUD PGU display drive system according to claim 2, characterized in that: The deserializer module is used to separate a serial signal consisting of an image signal and local backlight raw data generated based on the image signal based on a built-in deserializer; Convert the image signal directly into LVDS format and transmit it to the backlight panel of the LED display module for driving the display; The local backlight raw data generated according to the image signal is reorganized into an IIC communication protocol format and transmitted to the MCU module in real time via the IIC bus.

4. The vehicle HUD PGU display drive system according to claim 3, characterized in that: The MCU module is integrated with a data analysis module, a dynamic switch decision module, a PWM brightness calculation module and a second signal output module; The data analysis module is used to analyze the local backlight raw data to obtain the maximum grayscale value, average grayscale value and effective pixel ratio corresponding to each subarea image; The dynamic switch decision module is used to determine whether to trigger a lighting instruction based on the effective pixel ratio; The PWM brightness calculation module is used to calculate the basic brightness based on the maximum grayscale value and the average grayscale value, and dynamically adjust the basic brightness based on the ambient light compensation formula to obtain the final brightness; The second signal output module is used to output a control signal including a partition number, an LED switch state and a PWM duty cycle, and send the control signal to the LED driver module via the SPI bus.

5. The vehicle HUD PGU display drive system according to claim 4, characterized in that: The basic brightness calculation formula is: ； The ambient light compensation formula is: ； Where, is the preset weight value, is the preset light intensity coefficient.

6. The vehicle HUD PGU display drive system according to claim 1, characterized in that: The system also includes an LED power drive module for converting the high voltage input to the system into a low voltage required by the LED drive module and the LED display module. The low voltage is controlled by the LED drive module to power each partition of the LED display module.

7. The vehicle HUD PGU display drive system according to claim 6, characterized in that: The system also includes a power system for outputting two low-voltage power supply lines and one high-voltage power supply line, wherein the two low-voltage power supply lines respectively power the MCU module and the deserializer module, and the one high-voltage power supply line powers the LED power driver module.

8. The vehicle HUD PGU display drive system according to claim 1, characterized in that: The LED display module structure adopts general LED as the backlight panel of the TFT display screen and is designed with N partitions.

9. The vehicle HUD PGU display drive system according to claim 8, characterized in that: The N partitions of the LED display module are independently controlled partitions, and the N partitions are independently dynamically dimmed. The lighting and shutoff of the lamp beads in each partition are controlled accordingly according to the image display status of the TFT display screen.

10. A vehicle HUD PGU display driving method, the method being applied to the vehicle HUD PGU display driving system according to any one of claims 1 to 9, characterized in that: The method comprises: Sending a serial signal consisting of an image signal and local backlight raw data generated based on the image signal through the IVI terminal; The deserializer module receives the serial signal input from the IVI end and deserializes the image signal into an image signal that can be received and displayed by the LED display module. At the same time, the local backlight raw data is deserialized and forwarded to the MCU module. The MCU module processes the local backlight raw data through a preset lightweight decision algorithm to generate a control signal, wherein the control signal includes an LED lighting control signal and an LED brightness control signal; Controlling the backlight partition lighting and brightness adjustment of the LED display module based on the LED lighting control signal and the LED brightness control signal through the LED driving module; The LED display module performs partition display based on the control signal sent by the LED driving module.

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