Vehicle-mounted HUD system and vehicle

Abstract

The invention discloses a vehicle-mounted HUD system and a vehicle, and the system comprises an LCD panel which is used for generating a to-be-imaged target image under the irradiation of a backlight source, and directly projecting the to-be-imaged target image to a windshield glass, and the projected light is not reflected by a curved reflector; the controller is used for outputting a blackening control signal, so that the imaging brightness of the LCD panel in an area outside the target image is smaller than a preset threshold value, and light smaller than ambient light is projected; the shielding cover and the PGU are configured to be fixedly installed at the specific position of the center console at a specific angle so as to optimize the reflection path of light from the LCD panel to the eyes of a driver, and the second surface is attached to the light-emitting surface of the PGU and at least shields the area outside the target image of the LCD panel. Light of a target image of the LCD panel penetrates through the first surface from the second surface through the light-transmitting groove and is directly projected to the windshield glass. The vehicle-mounted HUD system not only can avoid complexity and save the center control space, but also can ensure the imaging effect of the HUD.

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 development of vehicle technology, higher and higher requirements are put forward for the convenience and safety of vehicle use. For example, head up display (HUD) has been widely used in vehicles. Head up display is a device that projects instrument information and / or navigation information in front of the driver's field of vision. The driver can see the instrument information and navigation information in front of the field of vision without having to look down at the instrument panel or central control display screen under the steering wheel, thereby improving driving safety.

[0003] Traditional HUD systems are generally designed with hyperbolic mirrors, such as Figure 1 As shown, Figure 1 The diagram 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. Finally, the image is 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, due to the limitations of its size and installation method, existing HUD systems also face challenges in some vehicles that need to save center console space (such as compact cars, small SUVs, etc.). In addition, after the HUD system occupies the center console space, the driver's field of vision will be limited, affecting 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 realize a small-size HUD and save center console space while maintaining high-quality imaging effects.

[0007] To achieve the above purpose, 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 used to output a blackening control signal so that the imaging brightness of the LCD panel in the area outside the target image is less than a preset threshold value, so as to project light that is less than ambient light;

[0011] The viewing cover and the PGU unit are configured to be fixedly installed 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 fits 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 from the second surface through the first 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 arc-shaped sunshade, which is arranged on the first surface and located between the LCD panel and the windshield, so as to physically enclose and block ambient light from directly hitting a target imaging area of ​​the LCD panel; and a notch is provided on the arc-shaped sunshade near the windshield to provide a light path channel for the LCD panel to project onto the windshield.

[0014] Optionally, the arc-shaped 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 outer side 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 hole is arranged corresponding to the embedded screw hole on the center console, and the fastening screw hole and the embedded screw hole cooperate to fix the PGU unit 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 dimension is adapted to the inner diameter of the fixing hole.

[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 arranged on the top of the LCD panel; and the vehicle-mounted HUD system further comprises:

[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 of the pixel data drive cable to form a accommodating space; the accommodating 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 passes through the wire groove and is connected to the main control circuit board, so that the pixel data drive cable provides a clamping 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, in which a PGU unit including a backlight source, an LCD panel and a controller directly projects the target image onto the windshield after generating the target image, 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 the traditional hyperbolic reflector, being applicable to various vehicles and saving the 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 the 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 the area outside the target imaging area, thereby effectively reducing the interference of stray light and enhancing the imaging effect of the target area, and 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, 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 omits the curved reflector, fixedly installs at a characteristic angle, 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 in the specific implementation manner through the introduction of specific technical features and technical solutions. Through the introduction of these technical features and technical solutions, those skilled in the art should be able to understand the beneficial technical effects brought about by the 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 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 car assembly disclosed in this embodiment;

[0033] Figure 4 A schematic diagram of an 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 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 confusing the essence of the present invention, known methods, processes, procedures, and components are not described in detail.

[0038] In addition, persons of ordinary skill in the art will appreciate that the drawings provided herein are for illustration purposes 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 interpreted 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 only used for descriptive purposes and cannot be understood as indicating or implying 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 the 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 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 An exploded schematic diagram of an on-vehicle HUD system and a car assembly disclosed in the present embodiment is shown. The on-vehicle HUD system includes a PGU unit 1 and a viewing cover 2. In the present 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, and the light output surface 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 are 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 and 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-size HUD system.

[0043] In this embodiment, after saving two curved mirrors, the device size of the HUD system can be greatly reduced, and accordingly, 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 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 5Schematic diagram of a bottom-view structure of a viewing cover disclosed in this embodiment, Figure 6 The schematic diagram of the top view structure of a viewing cover disclosed in the present embodiment is shown in FIG. The viewing 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 viewing cover 2 includes a light-transmitting groove 23 that passes through the first surface 21 and the second surface 22, and 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 first surface 21 from the second surface 22 through the light-transmitting groove 23 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 viewing cover can be modeled according to 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 the present embodiment, the viewing cover 2 can be integrally formed by injection molding to ensure positioning accuracy. In the specific implementation process, a positioning piece 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 piece, so that the light-emitting surface of the PGU unit emits light to 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 part 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, and 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, thereby reducing the stray light reflected from the area outside the target image to the windshield, eliminating the impact of stray light, improving the brightness difference between the target image and the environment, and thus improving the imaging effect.

[0047] In the specific embodiment, please refer to Figure 5, 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. Specifically, a plug hole that matches the connector 25 can be provided 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 positioning of the viewing cover 2 and the center console is achieved through the connector 25 and the plug hole, and 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 to the windshield at a specific angle. In the 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 , a plurality of lugs 14 are provided on the shell of the PGU unit 1, 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 and the embedded screw hole cooperate 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. Specifically, the relative position relationship between the center console and the windshield 100 is determined, so it is only necessary to position the PGU unit and the viewing cover 2 on the center console, so that the PGU unit can emit light to the windshield 100 at a specific angle. In this embodiment, the square hole is processed on the center console by a mold, which can ensure the positioning accuracy on the one hand, and prevent the nut in the square hole 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 precisely guaranteed and not easily offset, that is, the position of the PGU unit 1 relative to the center console is precisely guaranteed, and the optical path of the light emitted from the light-emitting surface of the PGU unit 1 is precisely achieved. 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 offset caused by the locking screws, and then ensuring the accuracy of the output light path.

[0049] Please refer to Figure 6In an optional embodiment, the viewing cover 2 includes an enclosed arc-shaped light shield 26, which is disposed on the first surface 21 and located between the LCD panel 13 and the windshield, and physically encloses and shields the target imaging area of ​​the LCD panel 13 from direct ambient light; 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 be projected onto the windshield. In this embodiment, the enclosed arc-shaped light shield 26 with the notch can, on the one hand, shield the target imaging area of ​​the LCD panel 13 from direct ambient light, that is, avoid the interference of stray light, and on the other hand, enable the light of the target imaging area to be smoothly projected onto the windshield.

[0050] Please refer to Figure 6 In an optional embodiment, the arc-shaped sunshade 26 is provided with a tilting piece 26a protruding relative to the first surface 21, the target image area of ​​the LCD panel 13 is arranged next to the edge of the tilting piece, and the tilting piece blocks 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. Specifically, the tilting piece 26a can be a part of the arc-shaped sunshade 26, which is directly formed during injection molding; the tilting piece 26a can be perpendicular to the surface where the LCD panel 13 is located. In this way, ambient light can be prevented from being incident on the LCD panel 13. In this embodiment, the setting position of the lift tab 26a can be determined according to the position of the driving seat, mainly to avoid the light reflected from the LCD panel 13 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 avoid the light from being reflected on the windshield in front of the driving seat, thereby reducing the visual interference to the driver; specifically, for left-hand drive vehicles, it avoids the light from being reflected to the left front of the driving seat, reducing the light interference to the driver, thereby improving the driver's vision; for right-hand drive vehicles, it should avoid the light from being reflected to the right front of the driving seat.

[0051] Please refer to Figure 4 and Figure 7 , Figure 7 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 a 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 being able to prevent 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, by setting the LED light board on the back of the light guide plate 111, in this embodiment, the LED light bar is 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 opposite to each other 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 driving interface of the LCD panel 13 is arranged on the top of the LCD panel 13; the vehicle-mounted HUD system further includes: a pixel data driving cable 131, one end of which is connected to the data driving interface, and the other end of the pixel data driving cable 131 is connected to a main control circuit board 15 provided with a controller; the body of the pixel data driving cable 131 is bent downward from one end of the pixel data driving cable 131 to the other end 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, the LCD panel 13 and the main control circuit board 15 are connected by FPC, which can save space; and a storage space is formed between one end and the other end of the FPC by bending, through which part of the light guide plate 111 and part of the middle frame 112 can be stored, that is, the light guide plate 111 and the part of the top of the middle frame 112 can be covered, so as to avoid the misalignment of the various components / components stacked between the LCD panel 13 and the main control circuit board 15, that is, the position limitation between the various components / components stacked between the LCD panel 13 and the main control circuit board 15 is realized by reusing FPC. It not only saves space, but also protects the various stacked components.

[0056] In the specific embodiment, please refer to Figure 7, a wire groove 150 is provided on the main control circuit board 15, and the other end of the pixel data driving cable 131 passes through the wire groove 150 and is connected to the main control circuit board 15, so that the pixel data driving cable 131 provides a pressing force to the light guide plate 111 and the middle frame 112 through one end and the other end. The main control circuit board 15 is generally fixed to the HUD device housing by screws or the like. In this embodiment, after the pixel data driving cable 131 passes through the wire groove 150, the main control circuit board 15 can provide a pressing force for the bent accommodation space, so that the LCD panel 13 and the stacked devices / components between it and the main control 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 an 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 one 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 embodiments.

[0060] According to an embodiment of the present invention, a vehicle-mounted HUD system is disclosed, in which a PGU unit including a backlight source, an LCD panel and a controller directly projects the target image onto the windshield after generating the target image, 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 the traditional hyperbolic reflector, being applicable to various vehicles and saving the 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 the 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 the area outside the target imaging area, thereby effectively reducing the interference of stray light and enhancing the imaging effect of the target area, and 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, 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 omits the curved reflector, fixedly installs at a characteristic angle, 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 appreciated by those skilled in the art that, under the premise of no conflict, the above-mentioned preferred solutions can be freely combined and superimposed. Among them, the flowcharts and block diagrams in the accompanying drawings illustrate the possible 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, a program segment, or a part of a code, and the module, program segment, or a part of a code 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 a 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, without conflict, the above-mentioned preferred solutions can be freely combined and superimposed.

[0063] It should be understood that the above-mentioned embodiments are merely illustrative and not 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 all 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) 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 in contact with the light-emitting surface of the PGU unit and at least blocks the area outside the target image of the LCD panel (13), and the light of the target image of the LCD panel (13) passes through the first surface (21) from the second surface (22) through the light-transmitting groove (23) and is directly projected onto the windshield.

2. The vehicle-mounted HUD system according to claim 1, characterized in that: The controller includes a pixel control circuit configured to set pixel values ​​outside a target imaging area to zero.

3. The vehicle-mounted HUD system according to claim 1, characterized in that: The viewing cover (2) comprises an enclosed arc-shaped shading cover (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 direct ambient light; and a notch is provided on the arc-shaped shading cover (26) near the windshield to provide a light path channel for the LCD panel (13) to be projected onto the windshield.

4. The vehicle-mounted HUD system according to claim 3, characterized in that: The arc-shaped sunshade (26) is provided with a flap protruding relative to the first surface (21), the target image area of ​​the LCD panel (13) is arranged adjacent to the edge of the flap, and the shielding direction of the flap 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.

5. The vehicle-mounted HUD system according to claim 1, characterized in that: A fitting surface (24) that fits tightly 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 outer side of the fitting surface (24) on the second surface; when the connector (25) is plugged into the center console, the fitting surface (24) fits tightly with the LCD panel (13).

6. The vehicle-mounted HUD system according to claim 5, characterized in that: 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.

7. The vehicle-mounted HUD system according to any one of claims 1 to 6, characterized in that: The backlight source (11) comprises: A light guide plate (111) used for guiding an external light source to an LCD panel (13) after light homogenization, 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); The first LED light bar (113a) and the 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 provide the light guide plate (111) with the external light source.

8. The vehicle-mounted HUD system according to claim 7, characterized in that: 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), one end of which is connected to the data drive interface, and the other end of which 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 of the pixel data drive cable (131) to the other end 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).

9. The vehicle-mounted HUD system according to claim 8, characterized in that: 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 for the light guide plate (111) and the middle frame (112) through one end and the other end thereof.

10. A vehicle, characterized in that: include: Windshield; The vehicle-mounted HUD system as described in any one of claims 1 to 9.

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