Head-up display device and vehicle

Abstract

The embodiment of the invention provides head-up display equipment and a vehicle. The head-up display device comprises a light machine module, a light splitting and combining module, a reflector group and a windshield. The light machine module comprises an image generation unit and a light diffuser, and the light diffuser is used for carrying out partition modulation on projection light rays emitted by different display areas of the image generation unit, so that light rays of a first area and light rays of a second area form opposite deflection directions and a diffusion angle is controlled not to exceed a preset angle; the light splitting and combining module comprises a spectroscope and a reflector, the spectroscope and the reflector are obliquely arranged relative to the normal direction of the light emitting plane of the light diffuser, and the reflector deflects relative to the inclination direction of the spectroscope, so that an included angle of at least 15 degrees is formed between the spectroscope and the reflector; the reflector group is used for receiving and amplifying the projection light processed by the light splitting and combining module; and the windshield is used for reflecting the amplified projection light to the visual field of the user to form a long-shot virtual image and a close-shot virtual image with different depths of field.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of optical display technology, and more specifically, to a head-up display device and a vehicle. Background Art

[0002] Head-Up Display (HUD), an optical display technology that projects key information into the user's field of view in the form of a virtual image, has been widely used in the automotive, aviation and other fields.

[0003] Traditional HUD systems typically feature a single focal plane design, meaning the virtual image is positioned at a fixed distance from the user, such as a 2.5m W-HUD or over 10m AR-HUD. However, as demands for display content and visual interaction increase, single focal plane designs are no longer able to meet the demands of information display in complex scenarios.

[0004] Dual-focal-plane head-up display systems have emerged as a response to this need. These systems generate two images at different distances, displaying them separately based on the content at different distances, thereby enhancing the sense of depth and interactivity. However, existing dual-focal-plane head-up display systems are prone to optical crosstalk due to the spatial overlap of the two optical systems for the distant and near views. This means that the distant and near views are captured simultaneously by two optical systems, resulting in multiple virtual images and causing visual disturbances for the user. Therefore, effectively eliminating signal crosstalk is a key challenge in the design of dual-focal-plane head-up display systems. Summary of the Invention

[0005] The purpose of this application is to provide a new technical solution for a head-up display device and a vehicle.

[0006] In a first aspect, the present application provides a head-up display device, comprising: An optical machine module includes an image generation unit and a light diffuser. The light diffuser is disposed on the light-emitting side of the image generation unit and is used to perform zone-by-zone modulation on the projection light emitted from different display areas of the image generation unit, including controlling the diffusion angle and deflection direction of the light in each display area, so that the light in the first area and the light in the second area form opposite deflection directions and control the diffusion angle to be less than or equal to a preset angle. A light splitting and combining module, comprising a beam splitter and a reflector, wherein the beam splitter and the reflector are arranged obliquely relative to the normal direction of the light emitting plane of the light diffuser, and the reflector is deflected relative to the inclination direction of the beam splitter, so that an angle of at least 15° is formed between the beam splitter and the reflector, for guiding the light of the first area and the light of the second area into a long-range optical path and a near-range optical path, respectively; A reflector assembly, configured to receive and amplify the projection light processed by the light splitting and combining module; and The windshield is used to reflect the magnified projection light to the user's field of view, forming distant virtual images and near virtual images with different depths of field.

[0007] Optionally, the light diffuser is configured to: enable the light in the first area to be deflected and projected toward the beam splitter, and enable the light in the second area to be deflected and projected toward the reflector, while controlling the diffusion angles of the light in the first area and the light in the second area to be ≤10°.

[0008] Optionally, the beam splitter is a semi-transparent semi-reflective mirror or a polarizing beam splitter.

[0009] Optionally, the reflector is a total reflector.

[0010] Optionally, the light splitting and combining module further includes an angle suppression device, which is arranged on the optical path between the beam splitter and the reflector and is used to block projection light with an incident angle greater than 40°.

[0011] Optionally, the angle suppression device is perpendicular to the light emitting plane of the light diffuser.

[0012] Optionally, the angle suppression device is a privacy film or a diffraction grating, which includes an optical microstructure layer, and the optical microstructure layer includes periodically arranged microstructure units; The angle suppression device is configured as follows: Allows light with an incident angle of 0° to 40° to pass through; At the same time, it can absorb or reflect light with an incident angle greater than 40° to block the crosstalk light transmission between the distant light path and the near light path.

[0013] Optionally, the angle between the beam splitter and the reflector ranges from 15° to 40°.

[0014] Optionally, the reflector group includes a first reflector and a second reflector, and the first reflector and the second reflector are both curved reflectors; The image generation unit is a DLP PGU, an LCOS PGU or a TFT PGU.

[0015] In a second aspect, the present application provides a vehicle, comprising: The head-up display device according to the first aspect.

[0016] The beneficial effects of this application are as follows: The head-up display device provided in the embodiments of the present application utilizes a light diffuser to perform zoned modulation of the projection light from different display areas of the image generation unit, causing the light from the first area and the light from the second area to be deflected in opposite directions (e.g., one deflected to the right and the other to the left) while controlling the diffusion angle. Combined with the design of a tilted angle of at least 15° between the beam splitter and the reflector in the light splitting and combining module, this effectively achieves effective physical separation of the distant and near view light paths. This optical architecture significantly reduces the light signal crosstalk problem caused by the mutual intrusion of distant and near view light in a dual-focal plane head-up display system, avoiding overlapping interference of virtual images. Furthermore, through the coordination of the reflector assembly and the windshield, the user's visual experience is clearly presented with distant and near view virtual images of varying depths of field, significantly enhancing the interactive experience and imaging quality of the display system. In short, the head-up display device provided in the present application, through its novel optical design, solves the light signal crosstalk problem in a dual-focal plane head-up display system and enhances the user's visual experience.

[0017] 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

[0018] 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.

[0019] Figure 1 This is a schematic diagram of the structure of a traditional coaxial dual-focal plane head-up display system; Figure 2 Schematic diagram of the optical path of a traditional coaxial dual-focal plane head-up display system; Figure 3 One of the schematic diagrams of the structure and optical path of the head-up display device provided in an embodiment of the present application; Figure 4 The second schematic diagram of the structure and optical path of the head-up display device provided in an embodiment of the present application; Figure 5 A schematic diagram of a light diffuser provided in an embodiment of the present application; Figure 6 This is the ideal light diffusion intensity distribution diagram after passing through the light diffuser.

[0020] Description of reference numerals: 100. Optical machine module; 101. Image generation unit; 102. Light diffuser; 200, reflecting mirror assembly; 201, first reflecting mirror; 202, second reflecting mirror; 301, windshield; 401. Human eye; 501a, distant virtual image; 501b, near virtual image; 501c, abnormal distant virtual image; 601a, first area light; 601b, second area light; 601c, first crosstalk light; 601d, second crosstalk light; 611, initial light; 621, deflected light; 622, scattered light a; 623, scattered light b; 700, light splitting and combining module; 701, beam splitter; 702, reflector; 703, angle suppression device. DETAILED DESCRIPTION

[0021] Various exemplary embodiments of the present application 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 application.

[0022] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, its application, or uses.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] The following describes in detail a head-up display device and a vehicle provided in an embodiment of the present application in conjunction with the accompanying drawings.

[0027] According to one embodiment of the present application, a head-up display device is provided. Figure 3As shown, the head-up display device includes: an optical engine module 100, a light splitting and combining module 700, a reflector assembly 200, and a windshield 301. The optical engine module 100 includes an image generation unit 101 and a light diffuser 102. The light diffuser 102 is arranged on the light-emitting side of the image generation unit 101 and is used to perform zone-by-zone modulation on the projection light emitted from different display areas of the image generation unit 101, including controlling the diffusion angle and deflection direction of the light in each display area, so that the first area light 601a and the second area light 601b form opposite deflection directions and control the diffusion angle to be less than or equal to a preset angle. The light-splitting and light-combining module 700 includes a beam splitter 701 and a reflector 702. The beam splitter 701 and the reflector 702 are tilted relative to the normal direction of the light-emitting plane of the light diffuser 102, and the reflector 702 is deflected relative to the tilt direction of the beam splitter 701, so that an angle of at least 15° is formed between the beam splitter 701 and the reflector 702, which is used to guide the first area light 601a and the second area light 601b into a distant light path and a near light path, respectively. The reflector group 200 is used to receive and amplify the projection light processed by the light-splitting and light-combining module 700. The windshield 301 is used to reflect the amplified projection light to the user's field of view, forming a distant virtual image 501a and a near virtual image 501b with different depths of field.

[0028] The head-up display device (HUD) provided in the embodiment of the present application specifically solves the core problems of virtual image overlap interference, reduced imaging clarity and user visual fatigue caused by crosstalk between far and near view light in traditional dual-focal plane HUD systems. Through the collaborative light angle control technology of the light splitting and combining module 700 and the light diffuser 102, effective separation of the far view light path and the near view light path is achieved.

[0029] Specifically, the head-up display device provided in the embodiment of the present application, wherein the light splitting and combining module 700 adopts a light splitter 701-reflector 702 optical architecture design with an angle of at least 15 degrees, and cooperates with a light diffuser 102 (diffuser device) with a zone angle modulation, so that the first area light 601a ( Figure 3 The right side area light) and the second area light 601b ( Figure 3 The light in the middle left area is deflected in the opposite direction and the diffusion angle is controlled within a preset angle (e.g., within 10°), effectively blocking the abnormal light path, namely the crosstalk light transmission path. While ensuring the depth of field difference of the dual-focal plane display, it completely eliminates the virtual image ghosting phenomenon caused by light signal crosstalk, significantly improving the interactive reliability of multi-level information.

[0030] The following describes the main components of the head-up display device provided in the embodiment of the present application.

[0031] The head-up display device (HUD) provided in the embodiment of the present application achieves stable projection of dual-focal plane virtual images through the collaborative design of multiple modules, and can form a distant virtual image 501a and a near virtual image 501b with different depths of field within the user's field of view (human eye 401), and the formed distant virtual image 501a and near virtual image 501b are both clear and interference-free.

[0032] In the head-up display device provided in the embodiment of the present application, the optical engine module 100 serves as the core optical engine, which adopts the collaborative architecture of the image generation unit 101 and the light diffuser 102 (Diffuser device), see Figure 3 . Among them, the image generation unit 101 is responsible for projecting projection light that integrates distant view and near view information, and the light diffuser 102 performs partitioned spatial modulation on the projection light projected by the image generation unit 101 on its light output side. The light diffuser 102, for example, performs differentiated light control on the first area light 601a and the second area light 601b projected by the image generation unit 101 through a built-in specific microstructure unit array: on the one hand, the two area lights can form a transmission path with reverse deflection, and on the other hand, the diffusion angle of each light is constrained within a preset angle (for example, ≤10°). This optical isolation mechanism constructed from the light source end eliminates the possibility of cross-intrusion of distant and near view lights through physical angle separation, thereby blocking the optical path formation basis for signal crosstalk.

[0033] The head-up display device provided in the embodiment of the present application includes a light splitting and combining module 700, see Figure 3 As shown, the light splitting and combining module 700 includes a beam splitter 701 and a reflector 702. In the head-up display device provided in the embodiment of the present application, the light splitting and combining module 700 innovatively adopts a special tilting structure design, see Figure 3 Its core components, the beam splitter 701 and the reflector 702, are arranged non-parallel at an angle of ≥15°, breaking through the structural limitations of the coaxial parallel optical path of the traditional dual-focal-plane head-up display system. Figure 1 and Figure 2 This angle differentiation design in the present application achieves physical isolation of the distant view light path and the near view light path through geometric optics.

[0034] It should be noted that, in the present application, the reflector 702 and the beam splitter 701 are not arranged in parallel, but the reflector 702 is deflected relative to the beam splitter 701, the two are not in the same direction, and an angle of at least 15° is formed between them.

[0035] Specifically, after the light diffuser 102 modulates the projection light, the first area light 601a (i.e., distant view light) is directed toward the reflector 702. After being reflected by the reflector 702, it is transmitted along the distant view optical path, ultimately forming a distant view virtual image 501a in the user's field of view. The second area light 601b, on the other hand, passes through the beam splitter 701 and is transmitted along the near view optical path, forming a near view virtual image 501b. Due to the angle of 15° or greater between the two mirror bodies (beam splitter 701 and reflector 702), the transmission directions of the distant view light and the near view light are deflected in different directions, i.e., in opposite directions, and their spatial separation angle can reach over 10°. Please continue to refer to Figure 3 This geometric optical path isolation mechanism fundamentally blocks the cross-intrusion of abnormal optical paths and effectively eliminates the signal crosstalk problem in dual-focal plane display.

[0036] In the traditional coaxial dual-focal plane head-up display system, see Figure 1 In the optical structure shown, there is a high degree of spatial overlap between the long-range and short-range optical systems, which makes the signal crosstalk problem difficult to solve by physical shielding. Figure 2 : When the left half of the optical module 100 projects near-view light, the second area light 601b should form a near-view virtual image 501b at the terminal after being reflected by the reflector group 200 and the windshield 301. However, due to the coaxial design of the near- and far-view optical systems, and the fact that the reflector 702 and the beam splitter 701 are parallel to each other, part of the second area light 601b will form a first crosstalk light 601c, and pass through the abnormal reflection path of the reflector 702 and the beam splitter 701, and form an abnormal far-view virtual image 501c after being refracted by the same reflector group 200, thus generating a "near-view far-view" crosstalk phenomenon. Similarly, "far-view near-view" crosstalk also exists in the far-view display area. This cross-intrusion of optical paths causes the terminal virtual image to appear ghosting and blurred, which interferes with the driver's visual judgment.

[0037] This application aims to propose an optical architecture for a dual-focal-plane head-up display device without signal crosstalk. Figure 3 , the angle between the beam splitter 701 and the reflector 702 is changed from the traditional parallel arrangement to an inclined configuration with an angle of ≥15° between the two, so that the transmission directions of the near and far field light are deflected in the opposite direction (the spatial separation angle can be ≥10°). This design makes the incident angle of abnormal light paths, such as the first crosstalk light 601c, exceed the effective receiving range of the reflector 702, thus blocking the establishment of the crosstalk light path from the source. In addition, the light diffuser 102 is integrated in the optical machine module 100, which can implement differential modulation on the emitted first area light 601a and second area light 601b - so that the two area lights are deflected in the opposite direction and the diffusion angle is controlled within a certain range (such as within 10°), see Figure 5shown.

[0038] The head-up display device provided in the embodiment of the present application includes a reflector assembly 200, see Figure 3 As shown, the reflector assembly 200 receives the two light beams (near view light and distant view light) output by the light splitting and combining module 700 and amplifies them to ensure that the size of the formed virtual image meets the requirements of the vehicle display. The formed virtual image includes a near view virtual image 501b and a distant view virtual image 501a.

[0039] The head-up display device provided in this embodiment also includes a vehicle windshield 301. The windshield 301 acts as a final reflective surface to project the amplified light toward the human eye 401, simultaneously presenting a distant virtual image 501a and a near virtual image 501b in the user's field of view, achieving a dual-focal-plane display effect.

[0040] The head-up display device provided in the embodiment of the present application systematically solves the virtual image ghosting problem caused by the mutual intrusion of near and far scene light in the traditional dual-focal plane HUD through the dual mechanisms of angle modulation of the light diffuser 102 and angle separation of the light splitting and combining module 700.

[0041] The head-up display device provided in this embodiment utilizes a light diffuser 102 to modulate the projection light from different display areas of the image generation unit 101. This modulates the light from the first area 601a and the second area 601b into opposite deflection directions (e.g., one deflected to the right and the other to the left), and controls the diffusion angle. Combined with the design of a beam splitter 701 and reflector 702 in the light-splitting and light-combining module 700, which are tilted at an angle of at least 15°, this effectively achieves physical separation of the distant and near view light paths. This optical architecture significantly reduces the crosstalk caused by the mutual intrusion of distant and near view light in a dual-focal-plane head-up display system, preventing overlapping virtual images. Furthermore, through the coordination of the reflector assembly 200 and the windshield 301, the user's field of view is clearly presented with distant and near view virtual images 501a and 501b having different depths of field, significantly enhancing the interactive experience and imaging quality of the display system.

[0042] In short, the head-up display device provided in this application solves the problem of optical signal crosstalk in the dual-focal plane head-up display system through a new optical design, thereby improving the user's visual experience.

[0043] In some examples provided in the present application, the light diffuser 102 is configured to: enable the first area light 601a to be deflected and projected toward the spectrometer 701, and enable the second area light 601b to be deflected and projected toward the reflector 702, while controlling the diffusion angles of the first area light 601a and the second area light 601b to be ≤10°.

[0044] In the example provided in this application, the light diffuser 102 is designed with a microstructure unit array, for example.

[0045] In specific applications, the required microstructure unit array can be pre-customized based on the specific requirements for the light deflection direction and diffusion angle. It should be noted that this application does not impose any detailed restrictions or limitations on the specific design content of the microstructure unit array on the light diffuser 102, which falls within the professional scope of microstructure design.

[0046] In this application, the functions of the light diffuser 102 are described as follows: (1) Control of light deflection direction: Through the specific microstructure design of different areas on the light diffuser 102, the first area light 601a (i.e., distant view light) and the second area light 601b (i.e., near view light) projected by the image generation unit 101 can be deflected in opposite directions (the deflection directions of the two are different). Specifically, see Figure 3 : The first area light 601a is deflected to the right and projected onto the reflector 702, and the second area light 601b is deflected to the left and projected onto the beam splitter 701.

[0047] (2) Diffusion angle constraint: The diffusion angles of the first area light 601a (distant view light) and the second area light 601b (near view light) are controlled within the range of ≤10° to ensure that the light energy is concentrated in the normal transmission path.

[0048] See also Figure 5 The light diffuser 102 is a light distribution modulation device. The initial light 611 (i.e., projection light) output by the image generation unit 101 passes through the microstructure unit array of the light diffuser 102 to achieve light angle deflection and diffusion: (1) forming a deflected light 621; (2) forming a scattered light a622 and a scattered light b623; wherein the angle formed by the scattered light a622 and the scattered light b623 is the diffusion range.

[0049] The arrangement and shape of the microstructure units of the light diffuser 102 can control the light diffusion angle and deflection angle. Through the light diffuser 102, the angle between the scattered light a622 and the scattered light b623 is controlled within a certain angle range, which can be determined according to the situation of the head-up display device. For a dual-focal-plane head-up display device, the longitudinal FOV is usually not greater than 5°, so the diffusion angle can be controlled within 10°, so that most of the light can be controlled to form an image in a normal path, and there is almost no crosstalk caused by light at a large angle. At the same time, through the angle deflection of the light diffuser 102, it can be achieved Figure 3 The reverse transmission effect of the first area light 601a and the second area light 601b.

[0050] For ideal light diffusion intensity distribution, see Figure 6 As shown, the uniform intensity distribution is concentrated within a certain angular range. At angles exceeding the specified range, the energy is sharply attenuated, forming a standard rectangular flat-top square wave. However, the actual light energy distribution attenuation of the light diffuser 102 has a certain slope. To ensure the intensity requirement within the effective angle, light overflow will still occur at angles outside the specified range. Therefore, crosstalk can be improved by adjusting the angular positions of the internal beam splitter 701 and reflector 702 of the light splitting and combining module 700, as well as controlling the angle of the light diffuser 102.

[0051] The light diffuser 102 introduced in this application can suppress crosstalk between distant and near-field light. The reverse deflection design deflects the incident angle of anomalous light paths, such as the first crosstalk ray 601c in the near-field light, away from the effective range of the reflector 702, thereby reducing the impact of crosstalk. The 10° diffusion angle limit ensures that light energy is concentrated in the main light path, avoiding blurry virtual images caused by excessive diffusion.

[0052] In some examples provided in this application, see Figure 3 and Figure 4 The beam splitter 701 is a semi-transparent and semi-reflective mirror or a polarizing beam splitter.

[0053] In the head-up display device of the present application, the beam splitter 701 can be in the following two forms: Semi-transparent and semi-reflective mirror solution: A coating process can be used to impart both transmissive and reflective properties to the lens surface. For example, a typical transmission-reflectance ratio is 50:50 (this ratio is adjustable). The optical engine module 100 projects projection light: the left-half region, or second-region light 601b, is transmitted through the semi-transparent and semi-reflective mirror before entering the reflector assembly 200, forming a near-field virtual image 501b. The right-half region, or first-region light 601a, is reflected by the total reflection mirror 702 before being reflected by the semi-transparent and semi-reflective mirror and entering the reflector assembly 200, forming a far-field virtual image 501a.

[0054] Polarization beamsplitters: Utilizing the properties of polarized light, they allow only light with a specific polarization direction to transmit (e.g., P polarization) while reflecting all other light (e.g., S polarization). This solution can be used in conjunction with a polarizer for more efficient optical path separation.

[0055] In some examples provided in this application, see Figure 3 and Figure 4 , the reflector 702 is a total reflector.

[0056] See also Figure 3The light in the right half of the optical engine module 100, namely the first region light 601a, is first reflected by the reflector 702 (total reflector) to the beam splitter 701, and then reflected by the beam splitter 701 into the reflector assembly 200. This design creates an angle of more than 15° between the distant view light (the first region light 601a) and the near view light (the second region light 601b), reducing crosstalk by separating the optical paths.

[0057] The high reflectivity of the total reflection mirror ensures good brightness uniformity of the distant virtual image 501a. Combined with the 15° angle formed with the beam splitter 701, the incident angle of abnormal light paths, such as the first crosstalk light 601c in the near-field light, deviates from the effective range, thereby improving the crosstalk suppression rate.

[0058] In the present application, by adjusting the arrangement angle of the reflector 702 , it is possible to form an angle of at least 15° with the beam splitter 701 .

[0059] In this application, the beam splitter 701 achieves initial optical path separation through transmission / reflection or polarization selection, which is the basis for generating dual focal planes. The reflector 702 ensures the complete transmission of the distant optical path through its total reflection characteristics, and cooperates with the beam splitter 701 to form an optical path angle of more than 15°, forming a first-level crosstalk suppression architecture. The reflector 702 and the beam splitter 701, together with the reflector assembly 200 and the windshield 301, form a coaxial dual-focal plane optical system, achieving crosstalk-free display of virtual images of the near and far distances.

[0060] In some examples provided in this application, see Figure 4 The light splitting and combining module 700 further includes an angle suppression device 703 , which is disposed on the optical path between the beam splitter 701 and the reflector 702 and is used to block projection light with an incident angle greater than 40°.

[0061] The angle suppression device 703 is provided in the light splitting and combining module 700, specifically located on the optical path between the beam splitter 701 and the reflector 702, see Figure 4 Its main function is to selectively block projection light with an incident angle greater than 40°, which is used to solve the crosstalk problem caused by the high overlap of optical paths in coaxial dual-focal plane head-up display devices / systems. The specific optical path control logic is as follows.

[0062] Normal optical path (no crosstalk): Near-field light path: After being projected from the optical engine module 100, the second region light 601b is transmitted through the beam splitter 701, amplified by the reflector assembly 200, reflected by the windshield 301, and finally reaches the human eye 401, forming a near-field virtual image 501b. This path does not pass through the angle suppression device 703 and is unobstructed.

[0063] Long-range light path: First-region light 601a is projected from optical engine module 100, reflected by reflector 702, angle suppression device 703 (incident angle 0° to 30°), beam splitter 701, reflector assembly 200, windshield 301, and eye 401, forming long-range virtual image 501a. Since the incident angle is ≤40°, it passes normally.

[0064] Crosstalk optical path, which is suppressed in this application, see Figure 5 : Optical path of the first crosstalk light 601c in the near-field light: Due to the high system overlap, the first crosstalk light 601c may be reflected by the reflector 702 and enter the angle suppression device 703 at a large angle (>40°), and be blocked and absorbed by the internal microstructure of the angle suppression device 703.

[0065] Optical path of the second crosstalk light 601 d in the distant view light: The second crosstalk light 601 d is incident on the angle suppression device 703 at a large angle (>40°) due to scattering and other reasons, and is also blocked and absorbed.

[0066] By introducing the angle suppression device 703 into the light splitting and combining module 700 , crosstalk light is further reduced, and the separation between near view and far view is significantly enhanced.

[0067] In some examples provided in this application, see Figure 4 , the angle suppression device 703 is perpendicular to the light emitting plane of the light diffuser 102 .

[0068] The angle suppression device 703 (such as a privacy film or a diffraction grating) and the light diffuser 102 (Diffuser device) may be in a perpendicular relationship.

[0069] The function of the light diffuser 102 is to diffuse and deflect the projection light projected by the image generating unit 101 so that the near-view light and the far-view light are output in opposite directions, thereby preliminarily reducing crosstalk.

[0070] Synergistic effect of vertical layout: After the angle suppression device 703 is placed vertically with the light diffuser 102, the crosstalk light (such as the first crosstalk light 601c and the second crosstalk light 601d) is doubly intercepted when passing through the light diffuser 102 and the angle suppression device 703 at a large angle (>40°).

[0071] Of course, the angle suppression device 703 (such as a privacy film or a diffraction grating) and the light diffuser 102 (Diffuser device) can also be approximately perpendicular to each other, such as forming an angle of 85° to 90°. The core of this is to achieve double crosstalk suppression through spatial angle separation.

[0072] In some examples provided in the present application, the angle suppression device 703 is an anti-peep film or a diffraction grating, which includes an optical microstructure layer, and the optical microstructure layer contains periodically arranged microstructure units; the angle suppression device 703 is configured to: allow light with an incident angle of 0° to 40° to pass through, and at the same time be able to absorb or reflect light with an incident angle greater than 40° to block the crosstalk light transmission between the distant light path and the near light path.

[0073] The privacy film is, for example, formed by stacking multiple layers of transparent dielectric films, and a nanoscale grating structure can be formed between the film layers to control the transmission angle through the interference effect.

[0074] The diffraction grating uses the diffraction principle to achieve angle selectivity.

[0075] When light is incident at an angle between 0° and 40°, the angle suppression device 703 can transmit the incident light along its original direction. For crosstalk light, such as the first crosstalk light 601c in the near-view light and / or the second crosstalk light 601d in the far-view light, when incident at an angle greater than 40°, the angle suppression device 703 can block and absorb it.

[0076] In some examples provided in this application, the angle between the beam splitter 701 and the reflector 702 ranges from 15° to 40°.

[0077] In existing dual-focal-plane head-up display systems, the optical systems for the far-field and near-field views overlap significantly, easily leading to crosstalk between signals. This occurs when light from the far field intrudes into the near-field optical system, or vice versa, causing the user to perceive virtual images of both the far and near fields interfering with each other. This problem is particularly acute in coaxial dual-focal-plane head-up display systems, as physical shielding through structural components cannot effectively isolate the images.

[0078] In the existing optical architecture, see Figure 1 and Figure 2 The reflector 702 is positioned nearly parallel to the beam splitter 701, causing light rays emitted from different regions of the image, such as the first region light 601a and the second region light 601b, to be approximately parallel, with a very small angle difference, for example, only about 5°. This small angle difference makes it easy for crosstalk light, such as the first crosstalk light 601c, to pass through the reflector 702 and beam splitter 701 and enter the human eye 401, causing interference.

[0079] A 15° angle is used as the lower limit to ensure basic crosstalk suppression effect; a 40° angle is used as the upper limit to take into account both system volume and cost control (too large an angle may increase system volume and production costs).

[0080] Optionally, the angle between the beam splitter 701 and the reflector 702 may be 15°, 20°, 25°, 30°, 35°, or 40°.

[0081] It should be noted that the angle between the beam splitter 701 and the reflector 702 is generally not more than 35°, and is not more than 40° at most, otherwise the entire system will be larger in size.

[0082] In some examples provided in this application, the reflector assembly 200 includes a first reflector 201 and a second reflector 202 , and both the first reflector 201 and the second reflector 202 are curved reflectors.

[0083] The first reflector 201 is close to the image generating unit 101 (PGU) and is responsible for preliminary reflection and adjustment of the propagation direction of light.

[0084] The second reflector 202 is close to the windshield 301 and is responsible for secondary reflection. Its curvature needs to match the curvature of the windshield 301 to reduce distortion.

[0085] In some examples provided in this application, the image generation unit 101 is a DLP PGU, an LCOS PGU, or a TFT PGU.

[0086] According to another embodiment of the present application, a vehicle is provided, comprising the head-up display device as described above.

[0087] The specific implementation of the vehicle in the embodiment of the present application can refer to the various embodiments of the above-mentioned head-up display device, and therefore at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0088] 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.

[0089] Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It should be understood by those skilled in the art that the above examples may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A head-up display device, characterized in that: include: An optical machine module (100) comprises an image generating unit (101) and a light diffuser (102), wherein the light diffuser (102) is arranged on the light-emitting side of the image generating unit (101) and is used to perform zoning modulation on the projection light emitted from different display areas of the image generating unit (101), including controlling the diffusion angle and deflection direction of the light in each display area, so that the light in the first area (601a) and the light in the second area (601b) form opposite deflection directions and control the diffusion angle to be less than or equal to a preset angle; A light splitting and combining module (700) comprises a beam splitter (701) and a reflector (702), wherein the beam splitter (701) and the reflector (702) are arranged to be tilted relative to the normal direction of the light emitting plane of the light diffuser (102), and the reflector (702) is deflected relative to the tilt direction of the beam splitter (701), so that an angle of at least 15° is formed between the beam splitter (701) and the reflector (702), and is used to guide the first area light (601a) and the second area light (601b) into a distant view light path and a near view light path, respectively; A reflector assembly (200) for receiving and amplifying the projection light processed by the light splitting and combining module (700); and The windshield (301) is used to reflect the magnified projection light to the user's field of view, forming a distant virtual image (501a) and a near virtual image (501b) with different depths of field.

2. The head-up display device according to claim 1, characterized in that: The light diffuser (102) is configured to: enable the first region light (601a) to be deflected and projected toward the beam splitter (701), and enable the second region light (601b) to be deflected and projected toward the reflector (702), while simultaneously controlling the diffusion angles of the first region light (601a) and the second region light (601b) to be ≤10°.

3. The head-up display device according to claim 1, characterized in that: The beam splitter (701) is a semi-transparent, semi-reflective mirror or a polarizing beam splitter.

4. The head-up display device according to claim 1, characterized in that: The reflector (702) is a total reflector.

5. The head-up display device according to any one of claims 1 to 4, characterized in that: The light splitting and combining module (700) further comprises an angle suppression device (703), which is arranged on the optical path between the beam splitter (701) and the reflector (702) and is used to block projection light with an incident angle greater than 40°.

6. The head-up display device according to claim 5, characterized in that: The angle suppression device (703) is perpendicular to the light emitting plane of the light diffuser (102).

7. The head-up display device according to claim 5, characterized in that: The angle suppression device (703) is a privacy film or a diffraction grating; The angle suppression device (703) is configured to allow light with an incident angle between 0° and 40° to pass through, while being able to absorb or reflect light with an incident angle greater than 40°, so as to block crosstalk light transmission between the distant view light path and the near view light path.

8. The head-up display device according to claim 1, characterized in that: The angle between the beam splitter (701) and the reflector (702) ranges from 15° to 40°.

9. The head-up display device according to claim 1, characterized in that: The reflector assembly (200) comprises a first reflector (201) and a second reflector (202), and both the first reflector (201) and the second reflector (202) are curved reflectors; The image generation unit (101) is a DLP PGU, an LCOS PGU or a TFT PGU.

10. A vehicle, characterized in that: include: The head-up display device according to any one of claims 1 to 9.

Images