Vehicle-mounted HUD system and vehicle

Abstract

The present invention discloses an in-vehicle HUD system and vehicle. The in-vehicle HUD system includes: an LCD panel for generating a target image to be imaged under the illumination of a backlight source and projecting the image directly onto the windshield, wherein the projected light is not reflected by a curved reflector; a controller for outputting a blackening control signal to reduce the imaging brightness of the LCD panel outside the target image to less than a preset threshold, thereby projecting light less than ambient light; a visual shield and a PGU unit configured to be fixedly mounted at a specific position on the center console at a specific angle to optimize the reflection path of light from the LCD panel to the driver's eyes; a second surface conforming to the light-emitting surface of the PGU unit and shielding at least the area outside the target image of the LCD panel; and a light source for transmitting light from the target image of the LCD panel from the second surface through the first surface via a light-transmitting groove and directly projecting the light onto the windshield. This allows the in-vehicle HUD system to avoid complexity and save center console space while ensuring HUD imaging quality.

Description

Technical Field

[0001] The present invention relates to the field of HUD technology, and in particular to a vehicle-mounted HUD system and a vehicle. Background Art

[0002] With the continuous advancement of vehicle technology, the demand for vehicle convenience and safety is increasing. For example, heads-up displays (HUDs) have become widely used in vehicles. A HUD projects instrument information and / or navigation information directly into the driver's field of view. This allows the driver to see these information directly in front of their eyes, eliminating the need to look down at the instrument panel below the steering wheel or the center console display, thereby improving driving safety.

[0003] Traditional HUD systems are generally designed with hyperbolic mirrors, such as Figure 1 As shown, Figure 1 This is a schematic diagram of the optical path of a HUD system composed of a hyperbolic mirror in the prior art. The HUD system usually includes a picture generation unit (PGU), a curved reflector and a windshield. Specifically, the curved reflector includes a first curved reflector and a second curved reflector. The PGU unit generates an image, and then the optical depth of field and the magnification are increased by the first and second curved reflectors. The image is finally projected onto the windshield, and a virtual image with depth of field is formed in front of the vehicle. In the prior art, the image quality is optimized by optimizing the surface shape of the hyperbolic reflector, but this design is relatively large in size (generally, the length, width and height of the entire HUD system are: 200mm-400mm, 150mm-300mm, 100mm-200mm, respectively), and can only be applied to large cars, SUVs and other motor vehicles.

[0004] However, existing HUD systems face challenges in vehicles that need to conserve center console space, such as compact sedans and small SUVs, due to their size and installation limitations. Furthermore, the HUD system's use of center console space can limit the driver's field of view, impacting driving safety.

[0005] Therefore, how to achieve a small-size HUD and save center console space while maintaining high-quality imaging effects has become an urgent problem to be solved. Summary of the Invention

[0006] Based on the above situation, the main purpose of the present invention is to provide a vehicle-mounted HUD system and a vehicle to achieve a small-size HUD and save center console space while maintaining high-quality imaging effects.

[0007] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0008] In a first aspect, an embodiment of the present invention discloses a vehicle-mounted HUD system, which is applicable to a vehicle with a windshield. The vehicle-mounted HUD system includes: a PGU unit and a viewing cover;

[0009] The PGU unit includes: a backlight source, an LCD panel, and a controller, wherein the LCD panel is used to generate a target image to be imaged under the illumination of the backlight source and directly project the image onto the windshield, wherein the projected light is not reflected by the curved reflector;

[0010] The controller is configured to output a blackening control signal to make the imaging brightness of the LCD panel outside the target image smaller than a preset threshold, so as to project light that is smaller than ambient light;

[0011] The viewing cover and the PGU unit are configured to be fixedly mounted at a specific position on the center console at a specific angle to optimize the reflection path of light from the LCD panel to the driver's eyes, wherein the viewing cover includes a light-transmitting groove running through a first surface and a second surface, the second surface is attached to the light-emitting surface of the PGU unit and at least blocks the area outside the target image of the LCD panel, and the light of the target image of the LCD panel passes through the first surface from the second surface through the light-transmitting groove and is directly projected onto the windshield.

[0012] Optionally, the controller comprises a pixel control circuit configured to set pixel values ​​outside the target imaging area to zero.

[0013] Optionally, the viewing cover includes an enclosed curved light shield, which is arranged on the first surface and located between the LCD panel and the windshield, and physically encloses and blocks the target imaging area of ​​the LCD panel from direct exposure to ambient light; and a notch is provided on the curved light shield near the windshield to provide a light path channel for the LCD panel to project onto the windshield.

[0014] Optionally, the curved sunshade is provided with a tilted piece protruding relative to the first surface, the target image area of ​​the LCD panel is arranged next to the edge of the tilted piece, and the blocking direction of the tilted piece is the light reflected by the LCD panel toward the driving seat of the windshield, and the driving seat direction is the direction from the co-pilot seat to the driving seat.

[0015] Optionally, a fitting surface that fits tightly with the LCD panel is provided on the second surface of the viewing cover; a positioning connector that matches the positioning hole of the center console is also provided on the outside of the fitting surface on the second surface, and when the connector is plugged into the center console, the fitting surface fits tightly with the LCD panel.

[0016] Optionally, the shell of the PGU unit is provided with a plurality of lugs, each lug is provided with a fastening screw hole, the fastening screw holes are arranged corresponding to the embedded screw holes on the center console, and the fastening screw holes cooperate with the embedded screw holes to fix the PGU unit on the center console; wherein, the embedded screw holes are fixing holes and embedded nuts, the fixing holes are square holes processed by a mold on the center console, and the embedded nuts are metal nuts and the outer dimensions are adapted to the inner diameter of the fixing holes.

[0017] Optionally, the backlight source includes:

[0018] A light guide plate, used to guide the external light source to the LCD panel after uniform light treatment, and a plurality of imaging electrodes are distributed on the LCD panel;

[0019] a middle frame, accommodating and covering the outer side surface of the light guide plate;

[0020] The first LED light bar and the second LED light bar are respectively fixedly arranged on the outer sides of two opposite long sides of the middle frame, and the first LED light bar and the second LED light bar respectively provide the external light source to the light guide plate.

[0021] Optionally, the data drive interface of the LCD panel is provided on the top of the LCD panel; and the vehicle-mounted HUD system further includes:

[0022] A pixel data drive cable, one end of which is connected to the data drive interface, and the other end of the pixel data drive cable is connected to a main control circuit board provided with the controller; the body of the pixel data drive cable is bent downward from one end to the other end to form a receiving space; the receiving space covers a portion of the light guide plate and a portion of the middle frame.

[0023] Optionally, a wire groove is provided on the main control circuit board, and the other end of the pixel data drive cable is connected to the main control circuit board after passing through the wire groove, so that the pixel data drive cable provides a pressing force to the light guide plate and the middle frame through one end and the other end.

[0024] In a second aspect, an embodiment of the present invention discloses a vehicle, comprising:

[0025] windshield;

[0026] The vehicle-mounted HUD system disclosed in the first aspect above.

[0027] According to an embodiment of the present invention, a vehicle-mounted HUD system is disclosed, which includes a PGU unit including a backlight source, an LCD panel and a controller. After generating a target image, the PGU unit is directly projected onto the windshield, wherein the projected light is not reflected by the curved reflector, that is, the curved mirror is omitted in the optical path of the projected light, thereby avoiding the complexity of traditional hyperbolic reflectors, being applicable to various vehicles, and saving center console space; and the PGU unit is configured by a view cover to be fixedly installed at a specific angle and position, thereby optimizing the reflection path of light from the light source to the driver's eyes, thereby improving the clarity and brightness of the virtual image; on the other hand, pixel blackening is performed in areas outside the target imaging area, thereby effectively reducing stray light interference and enhancing the imaging effect of the target area, and the second surface is adhered to the light-emitting surface of the PGU unit and at least blocks the area outside the target image of the LCD panel, so that stray light cannot enter the area outside the target image, thereby ensuring the best display effect under various lighting conditions. It can be seen that the embodiment of the present invention eliminates the need for curved reflectors, fixed installation at characteristic angles, and organically combines technical means such as bonding and blackening, so that the vehicle-mounted HUD system can avoid complexity and save central control space while ensuring the imaging effect of the HUD.

[0028] Other beneficial effects of the present invention will be explained through the introduction of specific technical features and technical solutions in the specific implementation methods. Those skilled in the art should be able to understand the beneficial technical effects brought about by the introduction of these technical features and technical solutions. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The embodiments of the present invention will be described below with reference to the accompanying drawings.

[0030] Figure 1 A schematic diagram of the optical path of a HUD system composed of a hyperbolic mirror in the prior art;

[0031] Figure 2 This is a schematic diagram of a HUD optical path disclosed in this embodiment;

[0032] Figure 3 An exploded schematic diagram of an in-vehicle HUD system and a vehicle assembly disclosed in this embodiment;

[0033] Figure 4 This is a schematic diagram of the internal explosion structure of a PGU unit disclosed in this embodiment;

[0034] Figure 5 This is a schematic diagram of an upward-looking structure of a viewing cover disclosed in this embodiment;

[0035] Figure 6 This is a schematic diagram of a top view structure of a viewing cover disclosed in this embodiment;

[0036] Figure 7This is a schematic diagram of the internal structure of a PGU unit disclosed in this embodiment. DETAILED DESCRIPTION

[0037] The present invention is described below based on the following embodiments, but the present invention is not limited to these embodiments. In the following detailed description of the present invention, some specific details are described in detail. In order to avoid obscuring the essence of the present invention, well-known methods, processes, procedures, and components are not described in detail.

[0038] Furthermore, persons of ordinary skill in the art will appreciate that the figures provided herein are for illustration purposes only and are not necessarily drawn to scale.

[0039] Unless the context clearly requires otherwise, throughout the specification and claims, the words "include," "comprising," and similar words should be construed in an inclusive sense rather than an exclusive or exhaustive sense; that is, in the sense of "including but not limited to."

[0040] In the description of the present invention, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood to indicate or imply relative importance. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0041] In order to realize a small-size HUD and save center console space while maintaining high-quality imaging effects, this embodiment discloses a vehicle-mounted HUD system suitable for vehicles with windshields. In the solution disclosed in this embodiment, the target image generated by the PGU unit is directly projected onto the windshield. Please refer to Figure 2 , Figure 2 This is a schematic diagram of a HUD optical path disclosed in this embodiment, compared with Figure 1 It can be seen that in this solution, there is no curved reflector in the light path of the light emitted by the PGU unit, thereby reducing the size of the HUD device. Figure 3 , Figure 3 This is an exploded schematic diagram of an in-vehicle HUD system and a car assembly disclosed in this embodiment. The in-vehicle HUD system includes: a PGU unit 1 and a viewing cover 2. In this embodiment, the viewing cover 2 and the PGU unit 1 are fixedly installed at a specific angle at a specific position on the center console 200. The light output of the PGU unit 1 faces the windshield 100, so that the target image generated by the PGU unit 1 is directly projected (without reflection) onto the windshield 100 at a specific angle.

[0042] Please refer to Figure 4 , Figure 4This is a schematic diagram of the internal explosion structure of a PGU unit disclosed in this embodiment. The PGU unit 1 includes: a backlight source 11, an LCD panel 13 and a controller (reference numerals not shown in the figure). The LCD panel 13 is used to generate a target image to be imaged under the illumination of the backlight source, and directly project it onto the windshield, wherein the projected light is not reflected by the curved reflector. Specifically, the LCD panel 13 can be implemented by, for example, TFT technology. The working principle of TFT-LCD is that after the LCD is illuminated by the backlight source, the thin-film transistor integrated behind each pixel of the LCD panel drives the liquid crystal molecules to rotate to change the polarization state of the light source, thereby presenting different light and dark grayscales, and then presenting a color image through the RGB color filter. Compared with other imaging methods in the prior art, LCD imaging is smaller in size and thinner in thickness, thereby enabling the realization of a small-sized HUD system.

[0043] In this embodiment, after saving two curved mirrors, the device size of the HUD system can be greatly reduced. Correspondingly, its imaging quality will also be reduced. In order to improve the imaging effect of the HUD system, this embodiment improves the imaging effect by organically combining means such as a viewing cover and a controller. The details are as follows:

[0044] The controller is used to output a blackening control signal so that the imaging brightness of the LCD panel 13 in the area outside the target image is less than a preset threshold value, so as to project light that is less than the ambient light. Specifically, the LCD panel 13 uses a row and column scanning drive method to control the brightness change of each pixel. The LCD controller controls the orientation of the liquid crystal molecules of each pixel according to the input image signal to adjust its light transmittance, thereby realizing the display of the image. In a specific embodiment, the controller includes a pixel control circuit configured to set the pixel value outside the target imaging area to zero (of course, a certain error is allowed). The pixel control circuit can also directly turn off the pixels outside the target imaging area to achieve blackening processing.

[0045] In this embodiment, after obtaining the target image of the LCD panel 13, the controller controls the imaging brightness of the area outside the target image area to be less than a preset threshold (or set to 0), so that the light projected from the area outside the target image is less than the ambient light, so that the imaging brightness difference of the target image relative to the surrounding is the difference between the target image brightness and the ambient brightness. In the method of not controlling the area outside the target image, the imaging brightness difference is the difference between the target image brightness and the sum of the ambient brightness and the stray light in the area outside the target image. It can be seen that compared with the method of not controlling the area outside the target image, this embodiment can eliminate the influence of stray light, improve the brightness difference between the target image and the environment, and thus improve the imaging effect.

[0046] Please refer to Figure 5 and Figure 6 , Figure 5This is a schematic diagram of a bottom-view structure of a viewing cover disclosed in this embodiment. Figure 6 This is a schematic diagram of the top view structure of a view cover disclosed in this embodiment. The view cover 2 is configured to fix the PGU unit at a specific position on the center console at a specific angle to optimize the reflection path of light from the LCD panel 13 to the driver's eyes, wherein the view cover 2 includes a light-transmitting groove 23 that passes through the first surface 21 and the second surface 22. The second surface 22 fits the light-emitting surface of the PGU unit and at least blocks the area outside the target image of the LCD panel 13; the light of the target image of the LCD panel 13 passes through the light-transmitting groove 23 from the second surface 22 through the first surface 21 and is directly projected onto the windshield. Specifically, after the light path of the HUD system is determined using simulation software, the PGU unit and the view cover can be modeled based on the light path and the position of the light source, so that the PGU unit is located at a specific light source position and emits light toward a specific angle. In this embodiment, the view cover 2 can be integrally injection molded to ensure positioning accuracy. In the specific implementation process, a positioning member can be set on the second surface. During the assembly process, the viewing cover is directly installed at a specific position of the center console through the positioning member, so that the light-emitting surface of the PGU unit emits light toward the windshield at a specific angle. In this embodiment, the contour of the position corresponding to the PGU unit on the second surface 22 matches the light-emitting surface of the PGU unit, so that the second surface 22 is closely attached to the light-emitting surface of the PGU unit, and the attached portion at least blocks the area outside the target image of the LCD panel 13. Please refer to Figure 5 A plane matching the PGU unit is set on the periphery of the light-transmitting groove 23. The plane fits and blocks the area outside the target image of the LCD panel 13, thereby preventing stray light from entering the area outside the target image of the LCD panel 13. This reduces the stray light reflected from the area outside the target image to the windshield, eliminates the impact of stray light, improves the brightness difference between the target image and the environment, and thus improves the imaging effect.

[0047] In the specific embodiment, please refer to Figure 5The second surface of the viewing cover 2 is provided with a fitting surface 24 that is tightly fitted with the LCD panel 13; a positioning connector 25 that matches the positioning hole of the center console is also provided on the outside of the fitting surface 24 on the second surface. When the connector 25 is plugged into the center console, the fitting surface 24 is tightly fitted with the LCD panel 13. Specifically, a plug hole that matches the connector 25 can be set at a corresponding position on the center console. When the connector 25 is plugged into the plug hole of the center console, the relative position of the viewing cover 2 and the center console is positioned by the connector 25 and the plug hole. The light-transmitting groove 23 of the viewing cover 2 matches the light-emitting surface of the PGU unit, thereby achieving the light-emitting surface of the PGU unit emitting light toward the windshield at a specific angle. In a specific implementation process, when there is a glass panel outside the LCD panel 13, the fitting surface 24 is tightly fitted with the glass panel. At this time, the glass panel is tightly fitted with the LCD panel 13, that is, the LCD panel 13 is always tightly fitted.

[0048] In the specific embodiment, please refer to Figure 4 The shell of the PGU unit 1 is provided with a number of lugs 14, and each lug 14 is provided with a fastening screw hole. The fastening screw holes are arranged corresponding to the embedded screw holes on the center console, and the fastening screw holes and the embedded screw holes cooperate to fix the PGU unit 1 on the center console; wherein, the embedded screw holes are fixing holes and embedded nuts, and the fixing holes are square holes processed by the mold on the center console, and the embedded nuts are metal nuts and the outer dimensions are adapted to the inner diameter of the fixing holes. Specifically, the relative positional relationship between the center console and the windshield 100 is fixed, so it is only necessary to position the PGU unit and the view cover 2 on the center console to enable the PGU unit to emit light toward the windshield 100 at a specific angle. In this embodiment, the square holes are processed on the center console using a mold, which can ensure positioning accuracy on the one hand and prevent the nuts in the square holes from shifting on the other hand. Since the square hole is precisely positioned and the metal nut pre-embedded in the square hole is not easily deformed, the position of the PGU unit 1 relative to the square hole is ensured to be precise and not prone to positional displacement. In other words, the position of the PGU unit 1 relative to the center console is ensured to be precise, and the optical path of the light emitted from the light-emitting surface of the PGU unit 1 is precise. It should be noted that, compared with the conventional self-tapping nuts or screw holes in the prior art, the pre-embedded metal nuts are not easily deformed, thereby avoiding the displacement caused by the locking screws, and thus ensuring the accuracy of the output light path.

[0049] Please refer to Figure 6In an optional embodiment, the viewing cover 2 includes an enclosed curved light shield 26. The light shield 26 is disposed on the first surface 21 between the LCD panel 13 and the windshield, physically enclosing and shielding the target imaging area of ​​the LCD panel 13 from ambient light. A notch is provided in the curved light shield 26 near the windshield to provide a light path for the LCD panel 13 to project onto the windshield. In this embodiment, the enclosed curved light shield 26 with the notch notches not only shields the target imaging area of ​​the LCD panel 13 from ambient light, thus preventing interference from stray light, but also allows light from the target imaging area to be smoothly projected onto the windshield.

[0050] Please refer to Figure 6 In an optional embodiment, the curved light shield 26 is provided with a tab 26a protruding from the first surface 21. The target image area of ​​the LCD panel 13 is positioned adjacent to the edge of the tab. The tab blocks light reflected from the LCD panel 13 toward the driver's seat of the windshield. The driver's seat direction is the direction from the passenger seat toward the driver's seat. Specifically, the tab 26a can be a portion of the curved light shield 26, formed directly during the injection molding process. The tab 26a can be perpendicular to the surface of the LCD panel 13. This arrangement prevents ambient light from entering the LCD panel 13. In this embodiment, the setting position of the tilting piece 26a can be determined according to the position of the driving seat, mainly to prevent the LCD panel 13 from reflecting light toward the driving seat direction of the windshield. The so-called driving seat direction is the direction from the co-pilot seat to the driving seat. It can prevent light from being reflected on the windshield in front of the driving seat, thereby reducing visual interference to the driver; specifically, for left-hand drive vehicles, it prevents light from being reflected to the left front of the driving seat, reducing light interference to the driver, thereby improving the driver's vision; for right-hand drive vehicles, it should prevent light from being reflected to the right front of the driving seat.

[0051] Please refer to Figure 4 and Figure 7 , Figure 7 This is a schematic diagram of the internal structure of a PGU unit disclosed in this embodiment. In an optional embodiment, the backlight source 11 includes: a light guide plate 111, a middle frame 112, a first LED light bar 113a and a second LED light bar 113b, wherein:

[0052] The light guide plate 111 is used to guide the external light source to the LCD panel 13 after uniform light treatment. A plurality of imaging electrodes are distributed on the LCD panel 13 .

[0053] The middle frame 112 accommodates and covers the outer side of the light guide plate 111. For details, please refer to Figure 7The light guide plate 111 is arranged in the middle frame 112, that is, the side of the light guide plate 111 is covered by the frame to fix the light guide plate 111, thereby saving space perpendicular to the direction of the LCD panel 13, making the structure of the PGU unit compact, and preventing stray light from entering from the side of the light guide plate 111.

[0054] Please refer to Figure 4 and Figure 7 The first LED light bar 113a and the second LED light bar 113b are respectively fixedly arranged on the outside of the two opposite long sides of the middle frame 112, and the first LED light bar 113a and the second LED light bar 113b are respectively provided as external light sources to the light guide plate 111. Specifically, compared with the prior art method of setting an LED light board on the back of the light guide plate 111, in this embodiment, the LED light bars are set on the outside of the two opposite long sides of the middle frame 112. On the one hand, it can save space perpendicular to the direction of the LCD panel 13, making the structure of the PGU unit compact. On the other hand, by setting the first LED light bar 113a and the second LED light bar 113b on the outside of the two long sides, the brightness of the light source can be guaranteed.

[0055] Please refer to Figure 4 and Figure 7 In an optional embodiment, the data drive interface of the LCD panel 13 is set at the top of the LCD panel 13; the vehicle-mounted HUD system also includes: a pixel data drive cable 131, one end of which is connected to the data drive interface, and the other end of the pixel data drive cable 131 is connected to the main control circuit board 15 equipped with a controller; the body of the pixel data drive cable 131 is bent downward from one end to the other end of the pixel data drive cable 131 to form an accommodating space; the accommodating space covers a portion of the light guide plate 111 and a portion of the middle frame 112. In this embodiment, an FPC is used to connect the LCD panel 13 and the main control circuit board 15, saving space. A folded space is formed between one end of the FPC and the other end, which accommodates a portion of the light guide plate 111 and a portion of the middle frame 112. In other words, the space covers the tops of the light guide plate 111 and the middle frame 112, thereby preventing the various components stacked between the LCD panel 13 and the main control circuit board 15 from being misaligned. In other words, the reuse of the FPC allows the various components stacked between the LCD panel 13 and the main control circuit board 15 to be positioned relative to each other. This saves space while protecting the stacked components.

[0056] In the specific embodiment, please refer to Figure 7The main control circuit board 15 is provided with a wire groove 150. The other end of the pixel data drive cable 131 passes through the wire groove 150 and is then connected to the main control circuit board 15, so that the pixel data drive cable 131 can provide a pressing force to the light guide plate 111 and the middle frame 112 through its one end and the other end. The main control circuit board 15 is generally fixed to the HUD device housing by screws or other means. In this embodiment, after the pixel data drive cable 131 passes through the wire groove 150, the main control circuit board 15 can provide a pressing force to the bent accommodation space, so that the LCD panel 13 and the stacked devices / components between it and the main circuit board 15 can be better limited by the bent accommodation space, thereby better ensuring the stacking tightness of the stacked devices / components.

[0057] This embodiment uses the windshield as the imaging surface to form a virtual image. Specifically, using the principle of light reflection, after the light emitted from the screen is reflected by the windshield, the actual light enters the human eye, and its reverse extension line converges at a point, eventually presenting a dotted line. However, since the surface shape of the windshield is fixed, it is impossible to optimize the surface shape. That is, since the windshield is not a plane but a curved surface, the image formed will produce a large distortion, so it is necessary to correct the distortion and correct the virtual image into a regular image. Specifically, according to the distortion algorithm, the target image can be inversely processed according to the distortion algorithm and then projected onto the windshield. In summary, in the vehicle-mounted HUD system disclosed in this embodiment, the controller performs distortion correction processing on the target image and also blackens the pixels in the area outside the target image on the LCD panel.

[0058] This embodiment also discloses a vehicle, comprising:

[0059] Windshield and the vehicle-mounted HUD system disclosed in the above embodiment.

[0060] According to an embodiment of the present invention, a vehicle-mounted HUD system is disclosed, which includes a PGU unit including a backlight source, an LCD panel and a controller. After generating a target image, the PGU unit is directly projected onto the windshield, wherein the projected light is not reflected by the curved reflector, that is, the curved mirror is omitted in the optical path of the projected light, thereby avoiding the complexity of traditional hyperbolic reflectors, being applicable to various vehicles, and saving center console space; and the PGU unit is configured by a view cover to be fixedly installed at a specific angle and position, thereby optimizing the reflection path of light from the light source to the driver's eyes, thereby improving the clarity and brightness of the virtual image; on the other hand, pixel blackening is performed in areas outside the target imaging area, thereby effectively reducing stray light interference and enhancing the imaging effect of the target area, and the second surface is adhered to the light-emitting surface of the PGU unit and at least blocks the area outside the target image of the LCD panel, so that stray light cannot enter the area outside the target image, thereby ensuring the best display effect under various lighting conditions. It can be seen that the embodiment of the present invention eliminates the need for curved reflectors, fixed installation at characteristic angles, and organically combines technical means such as bonding and blackening, so that the vehicle-mounted HUD system can avoid complexity and save central control space while ensuring the imaging effect of the HUD.

[0061] It will be understood by those skilled in the art that, under the premise of no conflict, the above-mentioned preferred embodiments can be freely combined and superimposed. Among them, the flowcharts and block diagrams in the accompanying drawings illustrate the possible implementation architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, program segment, or part of the code, which contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart, can be implemented with a dedicated hardware-based system that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions. The numbering of each step in this article is only for the convenience of description and reference, and is not used to limit the order of execution. The specific execution order is determined by the technology itself, and those skilled in the art can determine various allowable and reasonable orders based on the technology itself.

[0062] Those skilled in the art will appreciate that, provided there is no conflict, the above preferred solutions can be freely combined and superimposed.

[0063] It should be understood that the above-mentioned embodiments are merely illustrative and non-restrictive. Without departing from the basic principles of the present invention, various obvious or equivalent modifications or substitutions that can be made by those skilled in the art to the above-mentioned details will be included in the scope of the claims of the present invention.

Claims

1. A vehicle-mounted HUD system, suitable for a vehicle with a windshield, characterized in that: The vehicle-mounted HUD system comprises: a PGU unit (1) and a viewing cover (2); The PGU unit (1) comprises: a backlight source (11), an LCD panel (13) and a controller, wherein the LCD panel (13) is used to generate a target image to be imaged under the illumination of the backlight source and directly project the image onto the windshield, wherein the projected light is not reflected by the curved reflector; The controller is used to output a blackening control signal so that the imaging brightness of the LCD panel (13) in an area outside the target image is less than a preset threshold value, so as to project light that is less than ambient light; The viewing cover (2) and the PGU unit are configured to be fixedly mounted at a specific position on the center console at a specific angle to optimize the reflection path of light from the LCD panel (13) to the driver's eyes, wherein the viewing cover (2) includes a light-transmitting groove (23) that passes through a first surface (21) and a second surface (22), the second surface is attached to the light-emitting surface of the PGU unit and at least blocks an area outside the target image of the LCD panel (13), and light of the target image of the LCD panel (13) passes from the second surface (22) through the first surface (21) through the light-transmitting groove (23) and is directly projected onto the windshield; the controller includes a pixel control circuit configured to set the pixel value outside the target imaging area to zero; The viewing cover (2) includes an enclosed arc-shaped light shield (26), which is arranged on the first surface (21) and located between the LCD panel (13) and the windshield, and physically encloses and shields a target imaging area of ​​the LCD panel (13) from ambient light directly incident on the LCD panel (13); and a notch is provided on the arc-shaped light shield (26) near the windshield to provide a light path for the LCD panel (13) to project onto the windshield; The backlight source (11) comprises: A light guide plate (111) is used to guide an external light source to an LCD panel (13) after uniform light processing, wherein a plurality of imaging electrodes are distributed on the LCD panel (13); a middle frame (112) for accommodating and covering the outer side surface of the light guide plate (111); A first LED light bar (113a) and a second LED light bar (113b) are respectively fixedly arranged on the outsides of two opposite long sides of the middle frame (112), the first LED light bar (113a) and the second LED light bar (113b) respectively providing the external light source to the light guide plate (111); The data drive interface of the LCD panel (13) is arranged on the top of the LCD panel (13); the vehicle-mounted HUD system further comprises: A pixel data drive cable (131) has one end connected to the data drive interface, and the other end of the pixel data drive cable (131) is connected to a main control circuit board (15) provided with the controller; the body of the pixel data drive cable (131) is bent downward from one end to the other end of the pixel data drive cable (131) to form a receiving space; the receiving space covers a portion of the light guide plate (111) and a portion of the middle frame (112).

2. The vehicle-mounted HUD system according to claim 1, wherein: The arc-shaped sunshade (26) is provided with a tilting piece formed by protruding relative to the first surface (21), the target image area of ​​the LCD panel (13) is arranged adjacent to the edge of the tilting piece, and the blocking direction of the tilting piece is the light reflected by the LCD panel (13) toward the driving position of the windshield, and the driving position direction is the direction from the co-pilot seat to the driving position.

3. The vehicle-mounted HUD system according to claim 1, wherein: A fitting surface (24) that is tightly fitted with the LCD panel (13) is provided on the second surface of the viewing cover (2); a positioning connector (25) that matches the positioning hole of the center console is also provided on the outside of the fitting surface (24) on the second surface; when the connector (25) is plugged into the center console, the fitting surface (24) is tightly fitted with the LCD panel (13).

4. The vehicle-mounted HUD system according to claim 3, wherein: The shell of the PGU unit (1) is provided with a plurality of lugs (14), each lug (14) is provided with a fastening screw hole, the fastening screw hole is arranged corresponding to the embedded screw hole on the center console, and the fastening screw hole cooperates with the embedded screw hole to fix the PGU unit (1) on the center console; wherein the embedded screw hole is a fixing hole and an embedded nut, the fixing hole is a square hole processed by a mold on the center console, and the embedded nut is a metal nut and the outer size is adapted to the inner diameter of the fixing hole.

5. The vehicle-mounted HUD system according to claim 1, wherein: The main control circuit board (15) is provided with a wire groove (150), and the other end of the pixel data drive cable (131) passes through the wire groove (150) and is connected to the main control circuit board (15), so that the pixel data drive cable (131) provides a pressing force to the light guide plate (111) and the middle frame (112) through one end and the other end.

6. A vehicle, characterized in that: include: windshield; The vehicle-mounted HUD system according to any one of claims 1 to 5.

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