Vehicle-mounted HUD system and vehicle

Abstract

The embodiment of the utility model provides a vehicle-mounted HUD system and a vehicle. The vehicle-mounted HUD system comprises an image display unit, an optical waveguide assembly, a reflection system and a windshield of a vehicle which are sequentially arranged in the light transmission direction. The optical waveguide assembly comprises a first optical waveguide sheet and a second optical waveguide sheet, the first optical waveguide sheet comprises a first coupling-in area, and the second optical waveguide sheet comprises a second coupling-in area; the image display unit can emit at least two beams of projection light rays which are not overlapped on the light ray propagation path, and the projection light rays are respectively projected to the first coupling-in area and the second coupling-in area; the reflection system is used for receiving the projection light from the optical waveguide assembly and reflecting the projection light to the windshield; the windshield can reflect the projection light to human eyes, and meanwhile, a reverse extension line of the projection light forms a virtual image at different scene depths in front of the windshield.

Description

Technical Field

[0001] The embodiments of the present utility model relate to the field of vehicle-mounted display technology, and more specifically, to a vehicle-mounted HUD system and a vehicle. Background Art

[0002] With the continuous advancement of automotive technology, in-vehicle HUD systems have become a key feature in modern vehicles. These systems project driving information directly onto the windshield, creating a virtual image that eliminates the need for drivers to look down at the instrument panel, thereby improving driving safety. However, most existing HUD systems only display images in a single focal plane, failing to meet drivers' needs for simultaneous access to information at varying distances. Utility Model Content

[0003] The purpose of the utility model is to provide a new technical solution for a vehicle-mounted HUD system and a vehicle.

[0004] In a first aspect, the present invention provides a vehicle-mounted HUD system. The vehicle-mounted HUD system includes an image display unit, an optical waveguide component, a reflection system, and a vehicle windshield, which are sequentially arranged along a light transmission direction;

[0005] The optical waveguide assembly includes a first optical waveguide plate and a second optical waveguide plate, wherein the first optical waveguide plate includes a first coupling-in region and the second optical waveguide plate includes a second coupling-in region;

[0006] The image display unit is capable of emitting at least two beams of projection light that do not overlap each other on the light propagation path, and projecting them onto the first coupling region and the second coupling region respectively;

[0007] The reflection system is used to receive the projection light from the optical waveguide assembly and reflect the projection light to the windshield;

[0008] The windshield can reflect the projection light to the human eye, and at the same time, the reverse extension line of the projection light forms a virtual image at different depths of field in front of the windshield.

[0009] Optionally, the first optical waveguide plate and the second optical waveguide plate are spaced apart along the light propagation direction and staggered perpendicular to the light propagation direction.

[0010] Optionally, the image display unit includes at least one image source and a projection lens;

[0011] The image source is used to emit projection light;

[0012] The projection lens is located on the light exit path of the image source;

[0013] The first coupling-in area and the second coupling-in area are respectively located on both sides of the exit pupil position of the projection lens, and the first coupling-in area and the second coupling-in area are staggered in a direction perpendicular to the light transmission direction.

[0014] Optionally, the image source is provided as one, and the image source is capable of emitting at least two beams of projection light, and the light cone angles of each beam of the projection light do not overlap with each other in space.

[0015] Optionally, the number of the image sources is two and they are arranged in an upper and lower spaced relationship;

[0016] Each of the image sources can emit a beam of projection light, and the light cone angles of each beam of projection light do not overlap with each other in space.

[0017] Optionally, in a field of view less than or equal to 20°, along the optical axis of the projection lens, an axial distance between any one of the first coupling region and the second coupling region and an exit pupil position of the projection lens is L, and L≤25 mm.

[0018] Optionally, the first optical waveguide plate includes a first outcoupling region, and the second optical waveguide plate includes a second outcoupling region;

[0019] The image display unit is capable of emitting a first light ray and a second light ray;

[0020] The first optical waveguide is used to transmit the first light coupled into the first coupling region to the first outcoupling region and couple out the light with pupil expansion, so as to form a distant virtual image;

[0021] The second optical waveguide is used to transmit the second light coupled in through the second coupling-in region to the second coupling-out region and couple out the light with pupil expansion, so as to form a near-field virtual image.

[0022] Optionally, the reflection system is a curved surface reflection system.

[0023] Optionally, the image source is any one of a transmissive image source, a reflective image source and a self-luminous source array.

[0024] In a second aspect, the present invention provides a vehicle, comprising:

[0025] the vehicle body, including the windscreen; and

[0026] As described in the first aspect, the vehicle-mounted HUD system is arranged on the vehicle body.

[0027] The beneficial effects of the utility model are:

[0028] An embodiment of the present invention provides an in-vehicle HUD system, a multi-focal-plane optical waveguide HUD system designed to address the inability of existing single-focal-plane HUD systems to meet diverse information display needs. This in-vehicle HUD system cleverly incorporates an optical waveguide assembly comprising two optical waveguide plates between the image display unit and the reflective system, enabling the simultaneous display of information at varying distances. This design enables the driver to simultaneously access information at varying distances, significantly improving information acquisition efficiency and safety during driving. Furthermore, the optical waveguide plates not only effectively transmit light but also expand it, further enhancing the display quality and performance of the in-vehicle HUD system.

[0029] Other features and advantages of the present specification will become apparent from the following detailed description of exemplary embodiments of the present specification with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the specification and, together with the description, serve to explain the principles of the specification.

[0031] Figure 1 A schematic diagram of the structure of the vehicle-mounted HUD system provided in an embodiment of the present utility model;

[0032] Figure 2 This is one of the structural diagrams of the image display unit of the vehicle-mounted HUD system provided in an embodiment of the present utility model;

[0033] Figure 3 This is the second structural diagram of the image display unit of the vehicle-mounted HUD system provided in an embodiment of the present utility model.

[0034] Description of reference numerals:

[0035] 1a, distant virtual image; 1b, near virtual image;

[0036] 2. Windshield;

[0037] 3. Human eye;

[0038] 4. Reflection system;

[0039] 51. First optical waveguide plate; 52. Second optical waveguide plate; 5a. First coupling region; 5b. Second coupling region;

[0040] 6. Image display unit; 61. Image source; 66. Projection lens; 6a. First light ray; 6b. Second light ray; 6c. Exit pupil position. DETAILED DESCRIPTION

[0041] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0042] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0043] Techniques and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the techniques and equipment should be considered part of the specification.

[0044] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0045] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0046] The following describes in detail the vehicle-mounted HUD system and vehicle provided by the embodiments of the present invention in conjunction with the accompanying drawings.

[0047] According to one embodiment of the present invention, a vehicle-mounted HUD system is provided. Figure 1 The vehicle-mounted HUD system includes an image display unit 6, an optical waveguide component, a reflection system 4, and a vehicle windshield 2, which are arranged in sequence along the light transmission direction; the optical waveguide component includes a first optical waveguide plate 51 and a second optical waveguide plate 52, the first optical waveguide plate 51 includes a first coupling region 5a, and the second optical waveguide plate 52 includes a second coupling region 5b; the image display unit 6 is capable of emitting at least two beams of projection light that do not overlap with each other on the light propagation path and project them onto the first coupling region 5a and the second coupling region 5b respectively; the reflection system 4 is used to receive the projection light from the optical waveguide component and reflect the projection light onto the windshield 2; the windshield 2 is capable of reflecting the projection light toward the human eye 3, and at the same time, the reverse extension line of the projection light forms a virtual image at different depths of field in front of the windshield 2.

[0048] The vehicle-mounted HUD system provided by the embodiment of the present invention can realize the simultaneous display of information at different distances by introducing a set of optical waveguide components between the image display unit 6 and the reflection system 4, and the optical waveguide component includes at least two optical waveguide sheets: a first optical waveguide sheet 51 and a second optical waveguide sheet 52. That is, the human eye 3 can see the information at the same time. Figure 1 The near view virtual image 1a and the distant view virtual image 1b are shown in FIG.

[0049] In the vehicle-mounted HUD system provided by the embodiment of the present utility model, see Figure 1 The light generated by the image display unit 6 is directed to the first coupling-in region 5a of the first optical waveguide plate 51 and the second coupling-in region 5b of the second optical waveguide plate 52. These two optical waveguide plates independently transmit and process the light they receive, ultimately generating virtual images (e.g., a distant virtual image 1a and a near virtual image 1b) at different depths of field in front of the windshield 2.

[0050] It should be noted that both the first optical waveguide plate 51 and the second optical waveguide plate 52 include an incoupling region and an outcoupling region for transmitting light.

[0051] Specifically, see Figures 1 to 3 The first optical waveguide 51 processes the first light 6a projected by the image display unit 6. This light is regulated to form a distant image 1a at a farther depth of field. Simultaneously, the second optical waveguide 52 independently processes the second light 6b from the image display unit 6, ultimately forming a near-field image 1b at a closer depth of field. This design not only ensures the simultaneous display of near- and far-field information, but also significantly enhances the layering and readability of the information, providing the driver with more intuitive and comprehensive driving assistance information.

[0052] In the embodiment of the present invention, the optical waveguide component plays a vital role as one of the core components of the entire vehicle-mounted HUD system.

[0053] Specifically, the optical waveguide assembly used in the present invention is mainly composed of at least two optical waveguide plates arranged in a specific manner, each of which can be used to guide at least one beam of light, and the light can be transmitted by total reflection within the corresponding optical waveguide plate.

[0054] It should be noted that after the incident light is injected into the coupling-in area of ​​the optical waveguide plate, the light is tilted inside the optical waveguide plate, and then is transmitted by total reflection inside the optical waveguide plate. This feature ensures that the light can propagate along the preset path inside the optical waveguide plate and will not escape easily. Since the light has a certain diffusion angle, when the light propagates in the optical waveguide plate, it will gradually expand. This feature enables the optical waveguide plate to expand the light from the image display unit 6, thereby forming a larger light-emitting area. When the light reaches the coupling-out area of ​​the corresponding optical waveguide plate, through a specific structural design, the coupling-out area no longer meets the total reflection condition, and part of the light can be emitted from the coupling-out area. These emitted light rays are reflected by the reflection system 4 and the windshield 2 of the vehicle in turn, and finally form a clear virtual image in front of the driver's eyes.

[0055] The optical waveguide design incorporated into this utility model not only considers light guidance and expansion, but also focuses on improving image quality and clarity. By precisely controlling the optical waveguide's coupling region, the image display unit's exit pupil position (real image exit pupil), and the light propagation path within the waveguide, image display quality and clarity can be optimized.

[0056] Thus, the optical waveguide plays a crucial role in the technical solution provided by this utility model. It not only guides and expands the light beam, but also enables multi-focal display and optimizes image quality and clarity. These features enable the in-vehicle HUD system to provide richer and clearer driver assistance information, thereby improving safety and convenience during driving.

[0057] An embodiment of the present invention provides an in-vehicle HUD system, a multi-focal-plane optical waveguide HUD system designed to address the inability of existing single-focal-plane HUD systems to meet diverse information display needs. This in-vehicle HUD system cleverly incorporates an optical waveguide assembly comprising two optical waveguide plates between the image display unit and the reflective system, enabling the simultaneous display of information at varying distances. This design enables the driver to simultaneously access information at varying distances, significantly improving information acquisition efficiency and safety during driving. Furthermore, the optical waveguide plates not only effectively transmit light but also expand it, further enhancing the display quality and performance of the in-vehicle HUD system.

[0058] In some examples of the present invention, see Figure 1 The first optical waveguide plate 51 and the second optical waveguide plate 52 are arranged at intervals along the light propagation direction and are staggered perpendicular to the light propagation direction.

[0059] The in-vehicle HUD system provided by the present invention employs at least two optical waveguides, such as a first optical waveguide 51 and a second optical waveguide 52, between the image display unit 6 and the reflective system 4. These waveguides are spaced apart along the light propagation direction and staggered perpendicularly to the light propagation direction. This allows for simultaneous display of information at different distances. Each optical waveguide independently processes corresponding light rays to form virtual images at varying depths of field.

[0060] The in-vehicle HUD system provided by this embodiment incorporates optical waveguide technology, enabling light to tilt and undergo total internal reflection after entering the corresponding waveguide slice. Through structural control, some light is emitted from the outcoupling region, creating an expanded light-exiting area. Furthermore, the staggered placement of the different waveguide slices in the direction of the light ensures that light entering different waveguide slices does not interfere with each other, resulting in independent imaging. This ensures the independence and clarity of each virtual image.

[0061] Thus, the in-vehicle HUD system provided by the present invention, through the introduction of a specially configured optical waveguide assembly, enables simultaneous display of information at different distances, not only improving driving safety and convenience but also optimizing the application of optical waveguide technology. Furthermore, this in-vehicle HUD system boasts technical advantages such as strong compatibility, high flexibility, and clear image quality, and has broad market prospects and application potential.

[0062] See also Figures 1 to 3 The image display unit 6 provided by the present invention can project at least two beams of light, and different beams of light will not interfere with or overlap each other on the propagation path.

[0063] Specifically, see Figure 2 and Figure 3 The image display unit 6 can project a first light 6a and a second light 6b. The first light 6a is directed to the first coupling-in region 5a of the first optical waveguide 51, and the second light 6b is directed to the second coupling-in region 5b of the second optical waveguide 5b. Because the two light beams (i.e., the first light 6a and the second light 6b) do not overlap in their propagation paths, they can be processed by the first optical waveguide 51 and the second optical waveguide 52, respectively, forming two distinct light-emitting areas. This enables the in-vehicle HUD system to simultaneously display virtual images at two different distances, near and far, satisfying the driver's need for real-time near- and far-distance information while driving.

[0064] According to this embodiment of the present invention, image quality and clarity are improved because the separated light paths reduce interference between light rays, thereby improving image purity and contrast.

[0065] Each optical waveguide sheet in the optical waveguide assembly can independently optimize its internal optical path and output conditions to further improve the clarity and quality of the image.

[0066] The simultaneous display of near and far views allows the driver to more intuitively obtain information about the road ahead and the surrounding environment, improving driving safety and comfort. The clear image quality and undisturbed light path also provide the driver with a more pleasant visual experience.

[0067] The technical solution of the present invention can further expand the display function of the vehicle-mounted HUD system by increasing the number of additional image sources and optical waveguides, thereby achieving more diversified information display.

[0068] In some examples of the present invention, see Figure 2 and Figure 3 The image display unit 6 includes at least one image source 61 and a projection lens 66; the image source 61 is used to emit projection light; the projection lens 66 is located on the light output path of the image source 61; the first coupling area 5a and the second coupling area 5b are respectively located on both sides of the exit pupil position 6c of the projection lens 66, and the first coupling area 5a and the second coupling area 5b are staggered perpendicular to the light transmission direction.

[0069] See also Figure 2 and Figure 3 When only one projection lens 66 is used in the image display unit 6, the image display unit 6 has a real image exit pupil, namely, an exit pupil position 6c.

[0070] Please continue to see Figure 2 and Figure 3 The image display unit 6 has two coupling regions behind it: a first coupling region 5a and a second coupling region 5b. In other words, a single exit pupil position 6c must match both the first coupling region 5a and the second coupling region 5b. Based on this, the first light 6a projected by the image display unit 6 can enter the first optical waveguide 51 through the first coupling region 5a at a suitable location behind the exit pupil 6c. The second light 6b projected by the image display unit 6 can enter the second optical waveguide 52 through the second coupling region 5b at a suitable location in front of the exit pupil 6c.

[0071] Although the first coupling zone 5a and the second coupling zone 5b are slightly misaligned with the exit pupil position 6c in the axial direction, the imaging quality can still meet the needs of the human eye. Only the brightness uniformity may be slightly reduced, but it does not affect the driver's visual experience at all.

[0072] That is to say, by controlling the first coupling area 5a and the second coupling area 5b to be slightly misaligned with the exit pupil position 6c in the axial direction, the two beams of light emitted by the image display unit 6 can be projected onto the first coupling area 5a and the second coupling area 5b respectively, so as to form two virtual images with different depths of field and ensure that the imaging quality meets the requirements of the human eye.

[0073] In some examples of the present invention, see Figure 2 , the image source 61 is set to be one, and the image source 61 can emit at least two beams of projection light, and the light cone angles of each beam of the projection light do not overlap with each other in space.

[0074] See also Figure 2 When the image source 61 is set to one, the image source 61 can generate at least two beams of light. In the example of the present invention, the number of the image sources 61 is small, which can reduce the production cost and weight of the entire vehicle HUD system.

[0075] The single image source 61 can emit at least two projection light beams, and the light cone angles of these light beams in space do not overlap, which means that their respective light beam paths are independent and will not interfere with each other.

[0076] It should be noted that the light cone angle refers to the angle of the cone-shaped light beam formed in space after the light is emitted from the image source 61. When the light cone angles of two or more light beams do not overlap in space, they can independently enter different optical paths without mixing or interfering with each other.

[0077] By controlling the different light beams emitted by a single image source 61 to enter different optical waveguides, image display at multiple focal planes can be achieved. Each optical waveguide corresponds to a specific focal plane, and because the light cone angles do not overlap, each beam of light accurately enters its corresponding optical waveguide, enabling independent display of images at multiple focal planes.

[0078] In this example of the present invention, by using a single image source 61 instead of multiple image sources, the structure of the in-vehicle HUD system can be significantly simplified, reducing manufacturing costs and complexity. Because each beam of light can independently enter its corresponding optical waveguide, interference and overlap between images with different focal planes can be avoided, thereby improving image quality. The multi-focal plane HUD system can simultaneously display image information at different distances, providing drivers with richer navigation, driving information, and safety warnings, thereby enhancing the user experience and driving safety.

[0079] In some examples of the present invention, see Figure 3, the image sources 61 are set to two and are arranged in an upper and lower interval; each of the image sources 61 can emit a beam of projection light, and the light cone angles of each beam of projection light do not overlap with each other in space.

[0080] In this example, see Figure 3 Two image sources 61 are used, spaced apart from each other. This configuration allows each image source 61 to independently generate a beam of projection light. The light cone angles of the light emitted by each image source 61 do not overlap in space, meaning the two light beams have independent beam paths and can enter different optical paths without interfering with each other.

[0081] See also Figure 3 Since the light cone angles of the light emitted by the two image sources 61 do not overlap in space, they can be guided to different light waveguides respectively, thereby realizing the display of multi-focal plane images.

[0082] By directing the light emitted by the two image sources 61 to different optical waveguides, images with two focal planes can be displayed. Each optical waveguide corresponds to a specific focal plane, and because the light cone angles do not overlap, the light from each image source can accurately enter its corresponding optical waveguide, thus achieving independent display of multi-focal plane images.

[0083] Using two independent image sources makes the in-vehicle HUD system more flexible and scalable. For example, the number of image sources can be increased or decreased as needed to meet the needs of different vehicle models or drivers.

[0084] In some examples of the present invention, at a field of view less than or equal to 20°, along the optical axis direction of the projection lens 66, the axial distance between any one of the first coupling zone 5a and the second coupling zone 5b and the exit pupil position 6c of the projection lens 66 is L, and L≤25mm.

[0085] The layout design in this example of the present invention is applicable to a field of view angle of less than or equal to 20° because at a large field of view angle, the requirements for the layout of optical elements and coupling efficiency are higher.

[0086] Regarding the limitation of axial distance L:

[0087] Along the optical axis of the projection lens 66, the axial distance L between the first coupling-in region 5a or the second coupling-in region 5b and the exit pupil 6c of the projection lens 66 is limited to L ≤ 25 mm. This limitation helps ensure that light can effectively exit the projection lens 66 and enter the corresponding optical waveguide, while also reducing light loss and distortion during the coupling process.

[0088] In the multi-focal-plane light waveguide HUD system provided by the present invention, the light waveguide's coupling efficiency is a key factor affecting image quality and brightness. By limiting the axial distance between each light waveguide's coupling region and the exit pupil of the projection lens 66 to a reasonable range, the angle and position of light coupling can be optimized, thereby improving the light waveguide's coupling efficiency.

[0089] Since the light coupling conditions are optimized and the coupling efficiency of the optical waveguide is improved, the image quality and brightness displayed by the vehicle in the HUD system of the present invention can be significantly improved.

[0090] It should be noted that limiting the axial distance L helps to ensure that the imaging quality meets the requirements of the human eye.

[0091] In some examples of the present invention, the first optical waveguide plate 51 includes a first outcoupling region, and the second optical waveguide plate 52 includes a second outcoupling region; the image display unit can emit a first light 6a and a second light 6b; the first optical waveguide plate 51 is used to transmit the first light 6a coupled in through the first coupling-in region 5a to the first outcoupling region and couple out with pupil expansion to form a distant virtual image 1a; the second optical waveguide plate 52 is used to transmit the second light 6b coupled in through the second coupling-in region 5b to the second outcoupling region and couple out with pupil expansion to form a near virtual image 1b.

[0092] See also Figure 2 and Figure 3 The first optical waveguide 51 can, for example, transmit the first light 6a emitted by the image display unit 6 and achieve pupil expansion outcoupling in its first outcoupling region. The second optical waveguide 52 can, for example, transmit the second light 6b emitted by the image display unit 6 and achieve pupil expansion outcoupling in its second outcoupling region. The light is diffused or widened during outcoupling, forming a larger output light spot or beam.

[0093] By designing two separate optical waveguides, the present invention enables the entire image display system to more effectively manage and control the transmission paths and outcoupling methods of two different light beams. This helps reduce interference between the beams, improving light utilization and overall system performance.

[0094] In some examples of the present invention, the reflection system 4 is a curved surface reflection system.

[0095] The reflection system 4 of the present invention is not limited to a single-curved surface HUD system, and may also be a double-curved surface or multi-curved surface HUD system, which is not specifically limited in the present invention.

[0096] In some examples of the present invention, the image source 61 is any one of a transmissive image source, a reflective image source, and a self-luminous image source.

[0097] In the present invention, the image source 61 can be a transmissive image source, such as a TFT. The image source 61 can also be a reflective image source, such as a DMD or LCOS. The image source 61 can also be a self-luminous image source, such as an LED, OLED, or Micro LED.

[0098] According to another embodiment of the present invention, a vehicle is provided, comprising a vehicle body and the vehicle-mounted HUD system as described above, wherein the vehicle body comprises a windshield 2 , and the vehicle-mounted HUD system is arranged on the vehicle body.

[0099] The in-vehicle HUD system provided by the present invention overcomes the limitation of traditional HUD systems that can only display information on a single focal plane, making the driving experience smoother and more comfortable. Specifically, the driver can obtain information about the distance and nearness of the vehicle in front of the vehicle at the same time, thereby improving driving safety.

[0100] The in-vehicle HUD system provided by this utility model utilizes a specially configured image display system to simultaneously display information at different distances, enhancing driving safety and convenience while also optimizing the application of optical waveguide technology. Furthermore, this in-vehicle HUD system boasts technical advantages such as strong compatibility, high flexibility, and clear image quality, and has broad market prospects and application potential.

[0101] The specific implementation of the vehicle of the embodiment of the utility model can refer to the various embodiments of the vehicle-mounted HUD system described above, and therefore at least has all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described one by one here.

[0102] The above embodiments focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0103] Although some specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art will appreciate that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art will appreciate that modifications may be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A vehicle-mounted HUD system, characterized in that: It comprises an image display unit (6), an optical waveguide component, a reflection system (4), and a vehicle windshield (2) which are sequentially arranged along a light transmission direction; The optical waveguide component comprises a first optical waveguide plate (51) and a second optical waveguide plate (52), wherein the first optical waveguide plate (51) comprises a first coupling region (5a), and the second optical waveguide plate (52) comprises a second coupling region (5b); The image display unit (6) is capable of emitting at least two beams of projection light that do not overlap each other on the light propagation path, and projecting them onto the first coupling-in area (5a) and the second coupling-in area (5b) respectively; The reflection system (4) is used to receive the projection light from the optical waveguide component and reflect the projection light to the windshield (2); The windshield (2) is capable of reflecting the projection light to the human eye (3), and simultaneously, the reverse extension line of the projection light forms a virtual image at different depths of field in front of the windshield (2); The image display unit (6) includes at least one image source (61) and a projection lens (66); The first coupling-in area (5a) and the second coupling-in area (5b) are respectively located on both sides of an exit pupil position (6c) of the projection lens (66), and the first coupling-in area (5a) and the second coupling-in area (5b) are staggered in a direction perpendicular to the light transmission direction; The image sources (61) are provided in two numbers and are arranged in an upper and lower spaced relationship; Each of the image sources (61) is capable of emitting a beam of projection light, and the light cone angles of each beam of projection light do not overlap with each other in space; Under a field of view less than or equal to 20°, along the optical axis direction of the projection lens (66), the axial distance between any one of the first coupling-in area (5a) and the second coupling-in area (5b) and the exit pupil position (6c) of the projection lens (66) is L, and L≤25mm.

2. The vehicle-mounted HUD system according to claim 1, characterized in that: The first optical waveguide plate (51) and the second optical waveguide plate (52) are arranged at intervals along the light propagation direction and are staggered perpendicular to the light propagation direction.

3. The vehicle-mounted HUD system according to claim 2, characterized in that: The image source (61) is used to emit projection light; The projection lens (66) is located on the light exit path of the image source (61).

4. The vehicle-mounted HUD system according to claim 3, characterized in that: The first optical waveguide plate (51) includes a first outcoupling region, and the second optical waveguide plate (52) includes a second outcoupling region; The image display unit is capable of emitting a first light ray (6a) and a second light ray (6b); The first optical waveguide plate (51) is used to transmit the first light (6a) coupled in through the first coupling-in region (5a) to the first coupling-out region and couple out the light in a pupil-expanding manner, so as to form a distant virtual image (1a); The second optical waveguide plate (52) is used to transmit the second light (6b) coupled in through the second coupling-in region (5b) to the second coupling-out region and couple out the light in a pupil-expanding manner, so as to form a near-field virtual image (1b).

5. The vehicle-mounted HUD system according to claim 1, characterized in that: The reflection system (4) is a curved surface reflection system.

6. The vehicle-mounted HUD system according to claim 3, characterized in that: The image source (61) is any one of a transmissive image source, a reflective image source and a self-luminous source array.

7. A vehicle, characterized in that: include: a vehicle body including a windshield (2); and The vehicle-mounted HUD system according to any one of claims 1 to 6, wherein the vehicle-mounted HUD system is arranged on the vehicle body.

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