Head-up display device and vehicle

Abstract

The invention discloses a head-up display device and a vehicle, the head-up display device comprises a first image generation unit, a plane mirror and a second image generation unit, the first image generation unit is used for emitting first image light, the plane mirror and the first image generation unit are oppositely arranged, and the second image generation unit is used for emitting second image light. The reflector is used for reflecting the first image light; the second image generation unit is arranged opposite to the plane mirror, is provided with a transflective surface, and is used for transmitting second image light rays through the transflective surface and reflecting the first image light rays reflected by the plane mirror through the transflective surface; wherein the transflective surface is a concave magnified curved surface. Through the above design, the design space of the image generation unit is saved, and the heat dissipation effect of the head-up display device is improved. Meanwhile, the head-up display picture is enlarged, the definition and the brightness of the picture are improved, and the display effect is improved.

Description

Technical Field

[0001] This application relates to the field of display technology, and more particularly to a head-up display device and a vehicle. Background Technology

[0002] Head-up displays (HUDs) are widely used in vehicles and other transportation tools to display information such as vehicle and road conditions on the windshield or composite mirror, placing this information in front of the driver's line of sight. This allows drivers to access this information while maintaining continuous attention to the road, thereby improving driving safety and providing a better driving experience.

[0003] A head-up display (HUD) mainly consists of two parts: a picture generation unit (PGU) and an optical display system. The PUG generates the output image for the HUD, while the optical display system displays the image. However, current PUG designs suffer from limited space, poor heat dissipation, and small, low-resolution, and low-brightness display screens, all of which negatively impact display quality. Summary of the Invention

[0004] The purpose of this application is to provide a head-up display device and a vehicle that improves the heat dissipation effect of the head-up display device while also increasing the size of the head-up display screen and improving the clarity and brightness of the screen.

[0005] This application discloses a head-up display device, which includes a first image generation unit, a plane mirror, and a second image generation unit. The first image generation unit emits a first image light, and the plane mirror is disposed opposite to the first image generation unit to reflect the first image light. The second image generation unit is disposed opposite to the plane mirror and has a translucent-reflective surface. The second image generation unit emits a second image light through the translucent-reflective surface and reflects the first image light reflected by the plane mirror through the translucent-reflective surface. The translucent-reflective surface is a concave magnified curved surface.

[0006] Optionally, the first image light is S-axis polarized light, and the second image light is P-axis polarized light.

[0007] Optionally, the second image generation unit includes a polarizing layer disposed on the transflective surface, and the polarizing axis of the polarizing layer is in the same direction as the polarization direction of the P-axis polarized light.

[0008] Optionally, the second image generation unit uses a curved display screen, and the reflective surface is the light-emitting surface of the curved display screen.

[0009] Optionally, the first image generation unit generates dynamic images, and the second image generation unit generates static images.

[0010] This application also discloses a means of transportation, which includes a windshield, a display platform, and a head-up display device as described above. The head-up display device is mounted on the display platform and projects images onto the windshield.

[0011] Optionally, the vehicle includes a quarter-wave plate disposed on the windshield and overlapping the image projected by the head-up display.

[0012] Optionally, the windshield includes a local heating component located within the heating zone of the windshield; the vehicle includes an image detection unit, a heating control unit, and a correction unit; the image detection unit is used to identify whether the image on the windshield is abnormal; the heating control unit is connected to both the local heating component and the image detection unit, and is used to control the local heating component to heat up when the image on the windshield is abnormal; the correction unit is connected to the head-up display device, and is used to control the image on the windshield from the head-up display device to overlap with the heating zone.

[0013] Optionally, the planar reflector and / or the second image generating unit are mounted on the display platform via a limiting member, and one end of the planar reflector and / or the second image generating unit is connected to the display platform via a spring; the correction unit includes a drive motor and a rotating head, the drive motor drives the rotating head to rotate, the rotating head is in contact with the other end of the planar reflector and / or the second image generating unit, and controls the rotation of the planar reflector and / or the second image generating unit to adjust the image position of the head-up display device on the windshield.

[0014] Optionally, the local heating component includes a metal wire distributed in the heating area; the windshield is made of laminated glass, and the metal wire is embedded inside the outer layer of the laminated glass; the vehicle includes a quarter-wave plate disposed on the inner surface of the laminated glass, overlapping the image projected by the head-up display device; the correction unit is also used to control the angle between the plane mirror and / or the second image generation unit and the quarter-wave plate.

[0015] The beneficial effects of this application embodiment are as follows: This application embodiment sets up two image generation units to achieve independent display of dual images on the windshield, meeting more display needs of users; wherein, the first image light emitted by the first image generation unit is reflected by the plane mirror and the second image generation unit to generate a first image on the windshield; the second image light emitted by the second image generation unit directly generates a second image on the windshield, so that the first image and the second image are formed side by side on the windshield, realizing independent display of dual images.

[0016] Compared to head-up display (HUD) devices that can only display one image, this embodiment can display two images, thus increasing the size of the HUD screen. Since this embodiment can display information in two images, it avoids squeezing information into a single image, enlarging the display size of each piece of information and improving image clarity. Furthermore, if a single image generation unit were used, enlarging its display screen to the size shown in this embodiment would result in light dispersion and reduced screen brightness. However, this embodiment uses two screens, so the size of each screen does not need to be enlarged; it can even be reduced, allowing for more concentrated light and thus improving screen brightness. Additionally, since this embodiment integrates the second image generation unit and the curved magnifying glass into one unit, it eliminates the need to consider the position and installation design of the curved magnifying glass's single structure, saving design space for the image generation unit and improving the heat dissipation of the HUD device. Attached Figure Description

[0017] The accompanying drawings, which form part of the specification, are used to provide a further understanding of the embodiments of this application and illustrate the implementation methods of this application, together with the textual description, to explain the principles of this application. Obviously, the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings: Figure 1 This is a schematic diagram of a head-up display device provided in the first embodiment of this application; Figure 2 This is a schematic diagram illustrating the reflectivity changes of S-axis polarized light and P-axis polarized light; Figure 3 This is a schematic diagram of a second image generation unit provided in the first embodiment of this application; Figure 4 This is a schematic diagram of a means of transportation provided in the second embodiment of this application; Figure 5 This is a schematic diagram of another means of transportation provided in the second embodiment of this application; Figure 6This is a schematic diagram of another means of transportation provided in the second embodiment of this application; Figure 7 This is a partial schematic diagram of a windshield provided in the second embodiment of this application; Figure 8 This is a schematic diagram of a correction unit design provided in the second embodiment of this application; Figure 9 This is a schematic diagram of another correction unit design provided in the second embodiment of this application.

[0018] Among them, 10 is a vehicle; 100 is a head-up display device; 110 is a first image generation unit; 120 is a plane mirror; 130 is a second image generation unit; 131 is a polarizing layer; 140 is a translucent / reflective surface; 200 is a windshield; 210 is a local heating component; 211 is a metal wire; 220 is a heating area; 221 is a first heating area; 222 is a second heating area; 300 is a display platform; 310 is a limiting component; 320 is a spring; 400 is a quarter-wave plate; 500 is an image detection unit; 600 is a heating control unit; 700 is a correction unit; 710 is a motor; and 720 is a rotating head. Detailed Implementation

[0019] It should be understood that the terminology, specific structural and functional details used herein are merely for describing particular embodiments and are representative. However, this application may be implemented in many alternative forms and should not be construed as being limited to the embodiments set forth herein.

[0020] Furthermore, unless otherwise explicitly specified and limited, "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0021] The present application will now be described in detail with reference to the accompanying drawings and optional embodiments.

[0022] Figure 1 This is a schematic diagram of a head-up display device provided in the first embodiment of this application. As a head-up display device 100 provided in the first embodiment of this application, the head-up display device 100 is used to be installed on a car for in-vehicle display. It mainly displays instrument information or route direction information at the windshield 200, so that the driver's eyes do not leave the front while obtaining information, thereby reducing the occurrence of accidents.

[0023] like Figure 1As shown, the head-up display device 100 includes a first image generation unit 110, a plane mirror 120, and a second image generation unit 130. The first image generation unit 110 emits a first image light, and the plane mirror 120 is disposed opposite to the first image generation unit 110 to reflect the first image light. The second image generation unit 130 is disposed opposite to the plane mirror 120 and has a transflective surface 140. The second image generation unit 130 emits a second image light through the transflective surface 140 and reflects the first image light reflected by the plane mirror 120 through the transflective surface 140. The transflective surface 140 is a concave magnified curved surface.

[0024] This embodiment of the application sets up two image generation units to achieve independent display of dual images on the windshield 200, meeting more display needs of users; wherein, the first image light emitted by the first image generation unit 110 is reflected by the plane mirror 120 and the second image generation unit 130 to generate a first image on the windshield 200; the second image light emitted by the second image generation unit 130 directly generates a second image on the windshield 200, so that the first image and the second image are formed side by side on the windshield 200, realizing independent display of dual images.

[0025] Compared to the head-up display device 100, which can only display one image, the embodiments of this application can display two images, thus increasing the size of the head-up display screen. Furthermore, the first image generation unit 110 and the second image generation unit 130 can work independently, and one of them can be controlled to work to achieve single image display, thereby meeting more usage needs.

[0026] Because this embodiment can display information in two images without squeezing it into a single image, the display size of each piece of information is enlarged, thereby improving the clarity of the image. Furthermore, if a single image generation unit is used and its display screen is enlarged to the size described in this application, it would cause light dispersion and reduced screen brightness. However, this embodiment uses two images for display, so the size of each image does not need to be enlarged; it can even be reduced, making the light more concentrated and thus improving screen brightness. In addition, because this embodiment combines the image generation unit and the curved magnifying glass in a conventional solution into a second image generation unit 130, the position and installation design of the curved magnifying glass structure do not need to be considered, saving design space for the image generation unit and improving the heat dissipation of the head-up display device 100.

[0027] In this embodiment, the head-up display device 100 can be an AR-HUD, in which case displaying stereoscopic images on the windshield 200 by the head-up display device 100 improves the user experience. Of course, the head-up display device 100 can also refer to a general planar HUD used to display flat images on the windshield 200. Regardless of the type of head-up display device 100 used, it can achieve the effect of increasing the size of the head-up display screen and improving the clarity and brightness of the image.

[0028] It should be noted that when light penetrates the surface of an optical element at a non-perpendicular angle, both reflection and transmission characteristics depend on polarization. In this case, the coordinate system used is defined by the plane containing the input and reflected beams. If the polarization vector of the light ray lies in this plane, it is called p-axis polarization; if the polarization vector is perpendicular to the plane, it is called s-axis polarization. Any input polarization state can be expressed as the vector sum of the s and p components.

[0029] In some embodiments, the first image light is S-axis polarized light, and the second image light is P-axis polarized light.

[0030] like Figure 2 As shown, under different incident angles, the reflectivity of S-axis polarized light is greater than that of P-axis polarized light. With increasing incident angle, the reflectivity of S-axis polarized light gradually increases, while the reflectivity of P-axis polarized light first decreases and then increases, especially at increasing incident angles. Between 55° and 60°, the reflectivity of P-axis polarized light is zero, after which the reflectivity of P-axis polarized light increases rapidly.

[0031] For the first image light, since it needs to be reflected by the plane mirror 120 and the transflective surface 140 before the image can be displayed on the windshield 200, the first image light must only undergo reflection; otherwise, light loss will occur, affecting the displayed image. For the second image light, since it only needs to pass through the transflective surface 140 to be displayed on the windshield 200, the second image light must only undergo transmission; otherwise, light loss will also occur, affecting the displayed image. Based on this, by using S-axis polarized light for the first image light, which has a high reflectivity, the first image light has good reflectivity, reducing light loss. At the same time, by using P-axis polarized light for the second image light, which has a low reflectivity, the second image light can pass through the transflective surface 140 better without excessive reflection, also reducing light loss. Therefore, by using S-axis polarized light for the first image light and P-axis polarized light for the second image light, the first image light has high reflectivity and the second image light has high transmittance, reducing light loss and improving the brightness and clarity of both the first and second images.

[0032] Furthermore, the angle between the first image ray emitted by the first image generation unit 110 and the plane mirror 120 is 70°-80°, and the angle between the first image ray reflected by the plane mirror 120 and the translucent-reflective surface 140 is 70°-80°. By designing the incident angle of the first image ray, the reflection effect of the first image ray can be improved while ensuring that the first image ray enters the target structure.

[0033] The angle between the second image light emitted by the second image generation unit 130 and the reflective surface 140 is 55°-60°, and can be further 57°. At this time, the reflectivity of the second image light entering the reflective surface 140 is 0. Therefore, the second image light will not be reflected, but will pass through the reflective surface 140 and form an image on the windshield 200, thereby improving the penetration effect of the second image light.

[0034] like Figure 3 As shown, the second image generation unit 130 includes a polarizing layer 131 (i.e., a polarizer), which is disposed on the transflective surface 140. Furthermore, the polarization axis of the polarizing layer 131 is aligned with the polarization direction of the P-axis polarized light, preventing S-axis polarized light from passing through the polarizing layer 131 and causing total internal reflection; while P-axis polarized light passes entirely through the polarizing layer 131. This design ensures that the first image light rays and the second image light rays do not interfere with each other, each forming its own corresponding image, further improving the clarity of both the first and second images.

[0035] The specific process of polarizing layer 131 is as follows: First, a layer of water-based adhesive is coated on the glass surface of the second image generating unit 130. Then, taking advantage of the strong hydrophilicity of polyvinyl alcohol (PVA) film, polyvinyl alcohol (PVA) immersed in periodide ions is placed in water. Next, the glass surface of the second image generating unit 130 is immersed in water so that the polyvinyl alcohol (PVA) adheres to the glass surface of the second image generating unit 130. Then, cellulose triacetate (TAC) is submerged in water and attached to the surface of polyvinyl alcohol (PVA) for protection, thus obtaining polarizing layer 131.

[0036] In some embodiments, the second image generation unit 130 employs a curved display screen, and the reflective surface 140 is the light-emitting surface of the curved display screen. By using a single curved screen to simultaneously generate the second image light and reflect the first image light, and to magnify both the first and second images, the space required for the image generation unit and the head-up display device 100 is greatly reduced. There is no need for a separate external structure with the reflective surface 140, nor is it necessary to consider the installation of this structure or its positional relationship with the display screen. This simplifies the installation process of the head-up display device 100 and improves its stability.

[0037] In some embodiments, the second image generation unit 130 may also employ a design combining a flat panel display with a magnifying lens, with the magnifying lens serving as a light-emitting surface 140 on the flat panel display. In this case, the flat panel display emits second image light rays, which pass through the magnifying lens to form an image on the windshield 200; the first image light rays are reflected by the flat mirror 120 and then reflected again by the magnifying lens onto the windshield 200 to form an image. Since flat panel displays are relatively inexpensive, this design avoids increasing the cost of the head-up display device 100. Furthermore, after fixing the flat panel display, the position of the magnifying lens can be adjusted independently, thereby adjusting the imaging effect of the first and second image light rays. Additionally, it overcomes the limitations imposed by the flat panel display on the size and curvature of the magnifying lens, allowing the magnifying lens to reflect all the first image light rays and transmit all the second image light rays, preventing light loss. It also improves the light convergence effect of the first and second image light rays, increasing the brightness of the image generated on the windshield 200.

[0038] The magnifying lens can be attached to the surface of the flat panel display screen, or the magnifying lens and the flat panel display screen can be fixed separately by a bracket. The specific design is not limited here and can be selected according to the actual situation.

[0039] In some embodiments, the first image generation unit 110 generates dynamic images, and the second image generation unit 130 generates static images; furthermore, the first image light can be designed as S-axis polarized light, and the second image light can be designed as P-axis polarized light.

[0040] First, the head-up display device 100 can simultaneously display static and dynamic images on the windshield 200. The static images can display temperature, humidity, address information, road information, and travel distance, while the dynamic images can display navigation routes, information about other vehicles on the road, and road congestion. By combining static and dynamic images, users can intuitively and holistically understand all travel information, thus improving the user's driving experience.

[0041] Secondly, the first image light is S-axis polarized light, generating a corresponding dynamic image, while the second image light is P-axis polarized light, generating a corresponding static image. Since the vibration direction of S-axis polarized light is fixed, there is a clear distinction between S-axis and P-axis polarized light. This results in a clear separation between the dynamic and static images generated by S-axis polarized light, leading to high contrast and no crosstalk between them. Furthermore, the state of S-axis polarized light (such as vibration direction and intensity) can be rapidly controlled by elements such as polarizers and liquid crystal molecules in the first image generation unit 110. The response speed matches the requirements of high-speed dynamic images, ensuring smooth transitions even during rapid image switching, thus improving the quality of dynamic display images. Meanwhile, P-axis polarized light effectively blocks stray light reflections from other polarization directions in the environment, preventing glare on the image. Even under direct sunlight, static images maintain clear details, thus improving the quality of static display images.

[0042] Of course, in other embodiments, the first image generation unit 110 can generate a static image, and the second image generation unit 130 can generate a dynamic image. Alternatively, both the first image generation unit 110 and the second image generation unit 130 can generate static images; or both the first image generation unit 110 and the second image generation unit 130 can generate dynamic images.

[0043] like Figure 4 As shown, a vehicle 10 provided as a second embodiment of this application includes a windshield 200, a display platform 300, and a head-up display device 100 as described above. The head-up display device 100 is mounted on the display platform 300 and projects images onto the windshield 200. The vehicle 10 can be a car, bus, or public transport vehicle.

[0044] like Figure 5 As shown, the vehicle 10 includes a quarter-wave plate 400 disposed on the windshield 200 and overlapping with the image projected by the head-up display device 100.

[0045] Considering that users may wear sunglasses to avoid sunlight affecting their vision while driving vehicle 10, if the polarization direction of the sunglasses is perpendicular to the polarized light emitted by the head-up display 100, the image on the windshield 200 will be invisible to the user. Therefore, by adding a quarter-wave plate 400 to the windshield 200, the polarized light emitted by the head-up display 100 is converted into circular light visible in all directions, thus preventing the image from being invisible to the user when viewing the windshield 200 while wearing sunglasses.

[0046] Since the optical axis of the quarter-wave plate 400 is parallel to the surface of the plate, when the linearly polarized light emitted by the head-up display device 100 is incident perpendicularly on the quarter-wave plate 400, it will be decomposed into o-light and e-light with different propagation speeds. When the two propagate in the quarter-wave plate 400, they will generate a phase difference. When the thickness of the quarter-wave plate 400 is designed so that the optical path difference between the o-light and e-light is λ / 4 (corresponding to a phase difference of π / 2), if the linearly polarized light emitted by the head-up display device 100 is incident on the quarter-wave plate 400 at 45°, the amplitudes of the o-light and e-light will be equal. The π / 2 phase difference will cause the linearly polarized light emitted by the head-up display device 100 to be converted into circularly polarized light.

[0047] In the specific propagation of light, if the first and second image rays are incident on the fast / slow axis of the quarter-wave plate 400 at a 45° angle, they will be decomposed into two orthogonal components of equal amplitude (parallel and perpendicular to the optical axis). When the first and second image rays pass through the quarter-wave plate 400 for the first time, the two orthogonal components produce a phase difference of +90° (π / 2), and the first and second image rays change from linearly polarized light to circularly polarized light. The circularly polarized light is reflected by the mirror behind the quarter-wave plate 400 and returns along the original path, passing through the quarter-wave plate 400 again. This second passage produces another phase difference of +90° (π / 2). The total phase difference between the two passages through the quarter-wave plate 400 is 180° (π). This π phase difference, combined with the inherent phase change of light during reflection, ultimately converts left-handed circularly polarized light into right-handed circularly polarized light (or vice versa), and it exits in a direction parallel to the original incident light, allowing the user to see circular light visible in all directions.

[0048] In some embodiments, the quarter-wave plate 400 is a birefringent crystal, which may be made of materials such as quartz or mica.

[0049] In some embodiments, the quarter-wave plate 400 is fabricated only at the display position of the windshield 200 to ensure the angle and light projection position. The quarter-wave plate 400 may be fabricated on the inner side of the windshield 200 or within the interlayer of the windshield 200.

[0050] In the actual use of the head-up display device 100, since the head-up display device 100 in this embodiment of the application displays dual images on the windshield 200, these two images may have abnormal display problems such as overlap, layering or distortion. Based on this, in some embodiments, this problem is solved by detecting, identifying and calibrating these abnormal display conditions.

[0051] like Figure 6 and Figure 7As shown, the windshield 200 includes a local heating component 210 located within the heating area 220 of the windshield 200; the vehicle 10 includes an image detection unit 500, a heating control unit 600, and a correction unit 700. The image detection unit 500 is used to identify whether the image on the windshield 200 is abnormal; the heating control unit 600 is connected to the local heating component 210 and the image detection unit 500 respectively, and is used to control the local heating component 210 to heat up when the image on the windshield 200 is abnormal; the correction unit 700 is connected to the head-up display device 100 and is used to control the image on the windshield 200 of the head-up display device 100 to overlap with the heating area 220.

[0052] The image detection unit 500, acting as an anomaly detector, can specifically be a camera positioned at the rearview mirror location in the vehicle 10. It captures or photographs images on the windshield 200 in real-time or after the head-up display 100 is activated. When overlap, layering, or distortion is detected between the first image generated by the first image generation unit 110 and the second image generated by the second image generation unit 130 on the windshield 200, the image detection unit 500 sends a command to the heating control unit 600, causing the heating control unit 600 to control the local heating component 210 to begin heating. At this time, the temperature of the heating area 220 where the local heating component 210 is located is higher than the temperature of other areas on the windshield 200. The subsequent correction unit 700, using the heating area 220 as a reference, observes the heating area 220 using an infrared camera or other thermal identifier and controls the head-up display 100 to move the first and second images into the corresponding heating area 220, thus resolving issues such as image overlap, layering, or distortion.

[0053] More specifically, the heating area 220 is divided into a first heating region 221 and a second heating region 222. The local heating component 210 also includes an independently operating first heating part and a second heating part. The first heating part is located within the first heating region 221 and controls the heating of the first heating region 221; the second heating part is located within the second heating region 222 and controls the heating of the second heating region 222. Under normal circumstances, the first image is located within the first heating region 221, and the second image is located within the second heating region 222. Moreover, when the first image and the second image have differences in shape or size, the first heating region 221 and the second heating region 222 can also be designed with different shapes or different sizes.

[0054] In some embodiments, the first heating element and the second heating element are driven independently. When the image detection unit 500 detects overlap, layering, or distortion between the first image generated by the first image generation unit 110 on the windshield 200 and the second image generated by the second image generation unit 130 on the windshield 200, the heating control unit 600 can first control the first heating element to heat up. If a misalignment is found between the first image and the first heating area 221, the correction unit 700 controls the head-up display device 100 to ensure that the first image falls entirely within the first heating area 221. If normal display is restored at this point, there is no need to control the second heating element to heat up again. However, if the first and second images still have overlap, layering, or distortion issues, the second heating element is then controlled to heat up. If a misalignment is found between the second image and the second heating area 222, the correction unit 700 controls the head-up display device 100 to ensure that the second image falls entirely within the second heating area 222, restoring normal display. This technology avoids simultaneously activating both heating elements during each detection and correction, reducing energy loss and enabling more precise movement of the image to the corresponding heating area.

[0055] Of course, in other embodiments, when there are display problems such as overlap, layering, or distortion between the first and second images, the second heating element can be heated first, and if the display is still abnormal, the first heating element can then be heated. The specific choice can be made according to the actual situation and is not limited here.

[0056] In some embodiments, the local heating assembly 210 includes a metal wire 211 distributed in the heating zone 220; the windshield 200 is made of laminated glass, and the metal wire 211 is embedded in the inner part of the outer layer of the laminated glass.

[0057] Because the diameter of the metal wire is small, it is not easily observed by the human eye when it is installed in the windshield 200, thus not affecting the user's line of sight. Moreover, the heat generated by a single metal wire is limited and will form a clear temperature boundary with the surrounding area. Therefore, the solution of using metal wire to form a heating area 220 can make the temperature of the heating area 220 significantly different from the surrounding temperature, avoiding the image from deviating from the heating area 220 during image correction.

[0058] In the heating zone 220, the metal wires can be arranged in a grid pattern, in a coil pattern, or in an irregular pattern. There is no limitation on this, as long as the heating zone 220 can be clearly distinguished from the surrounding area when heat is sensed.

[0059] Furthermore, after the metal wire 211 is embedded inside the outer layer of the laminated glass, when the vehicle 10 includes a quarter-wave plate 400, the quarter-wave plate 400 is disposed on the inner surface of the laminated glass, overlapping with the image projected by the head-up display device 100. At this time, the metal wire 211 is embedded inside the outer glass, and the quarter-wave plate 400 is located on the inner surface of the inner glass. A layer of glass separates the metal wire 211 and the quarter-wave plate 400 to prevent the heat generated by the metal wire 211 from affecting the quarter-wave plate 400. Moreover, after the first image light and the second image light pass through the quarter-wave plate 400, they can be reflected back by the metal wire behind the quarter-wave plate 400. At this time, the metal wire acts as part of the reflective structure, improving the light emission effect.

[0060] This application also provides a specific design for the correction unit 700, such as... Figure 8 As shown, the plane mirror 120 is mounted on the display platform 300 via a limiting member 310, and one end of the plane mirror 120 is connected to the display platform 300 via a spring 320. The correction unit 700 includes a drive motor 710 and a rotating head 720. The drive motor 710 drives the rotating head 720 to rotate, and the rotating head 720 is in contact with the other end of the plane mirror 120, controlling the rotation of the plane mirror 120 to adjust the image position of the head-up display device 100 on the windshield 200.

[0061] In this embodiment, the rotating head 720 controls the rotation of one end of the plane mirror 120, which enables fine-tuning of the angle of the plane mirror 120, thereby controlling the subtle movement of the displayed image on the windshield 200 and achieving a high-precision correction effect.

[0062] The rotating head 720 can be elliptical, triangular, square or other shapes, so that the plane mirror 120 can rotate when the rotating head 720 rotates, thereby realizing image position adjustment.

[0063] This embodiment of the application controls the rotation of the plane mirror 120 to adjust its angle, thereby adjusting the incident angle of the light from the first image and ultimately achieving position adjustment of the first image. Specifically, during the adjustment process, the image detection unit 500 and the heat identifier identify the degree of deviation of the displayed image from the heating area 220. The chip analyzes the required time or angle for controlling the rotation of the rotating head 720 and generates corresponding code. The control current passes through the drive motor 710, causing the rotating head 720 to rotate, so that the plane mirror 120 rotates to the specified amplitude. At this point, the first image is exactly located within the heating area 220. Afterwards, the drive motor 710 is de-energized, allowing the plane mirror 120 to maintain its designated position.

[0064] In other embodiments, such as Figure 9 As shown, the rotating head 720 in the correction unit 700 is attached to the second image generation unit 130, and controls the second image generation unit 130 to rotate in order to adjust the position of the second image on the windshield 200.

[0065] In some embodiments, the rotating head 720 in the correction unit 700 is simultaneously attached to the plane mirror 120 and the second image generation unit 130, and both are controlled to rotate simultaneously to adjust the positions of the first image and the second image on the windshield 200. Alternatively, two rotating heads 720 can be attached to the plane mirror 120 and the second image generation unit 130 respectively, and their rotation can be controlled separately to adjust the positions of the first image and the second image on the windshield 200 respectively.

[0066] In some embodiments, the rotating head 720 in the correction unit 700 may also be attached to the first image generation unit 110 to control the rotation of the first image generation unit 110 in order to adjust the position of the first image on the windshield 200.

[0067] In some embodiments, the correction unit 700, in addition to controlling the rotation of the plane mirror 120 and / or the second image generation unit 130, also controls the rotation of the quarter-wave plate 400 to adjust the angle between the plane mirror 120 and / or the second image generation unit 130 and the quarter-wave plate 400, so that the first image light and the second image light can better enter the quarter-wave plate 400.

[0068] The above description, in conjunction with specific optional embodiments, provides a further detailed explanation of this application and should not be construed as limiting the specific implementation of this application to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of this application, and all such modifications or substitutions should be considered within the scope of protection of this application.

Claims

1. A head-up display device, characterized in that, include: The first image generation unit is used to emit first image light; A plane mirror is disposed opposite to the first image generation unit and is used to reflect the light from the first image; as well as The second image generation unit is disposed opposite to the plane mirror and has a transparent and reflective surface. The second image generation unit is used to emit a second image light through the transparent and reflective surface and reflect the first image light reflected by the plane mirror through the transparent and reflective surface. The transparent and reflective surface is an enlarged concave curved surface.

2. The head-up display device as claimed in claim 1, characterized in that, The first image light is S-axis polarized light, and the second image light is P-axis polarized light.

3. The head-up display device as described in claim 2, characterized in that, The second image generation unit includes a polarizing layer disposed on the transflective surface, and the polarizing axis of the polarizing layer is in the same direction as the polarization direction of the P-axis polarized light.

4. The head-up display device as claimed in claim 1, characterized in that, The second image generation unit uses a curved display screen, and the reflective surface is the light-emitting surface of the curved display screen.

5. The head-up display device as claimed in claim 1, characterized in that, The first image generation unit generates dynamic images, and the second image generation unit generates static images.

6. A means of transportation, characterized in that, It includes a windshield, a display platform, and a head-up display device as described in any one of claims 1-5, wherein the head-up display device is mounted on the display platform and projects an image onto the windshield.

7. The means of transport as described in claim 6, characterized in that, The vehicle includes a quarter-wave plate disposed on the windshield and overlapping the image projected by the head-up display.

8. The means of transport as described in claim 6, characterized in that, The windshield includes a local heating component located within the heat-generating area of ​​the windshield. The vehicle includes an image detection unit, a heating control unit, and a correction unit. The image detection unit is used to identify whether the image on the windshield is abnormal. The heating control unit is connected to the local heating component and the image detection unit respectively, and is used to control the local heating component to heat up when the image on the windshield is abnormal. The correction unit is connected to the head-up display device and is used to control the image of the head-up display device on the windshield to overlap with the heating area.

9. The means of transport as described in claim 8, characterized in that, The plane mirror and / or the second image generating unit are mounted on the display platform by a limiting member, and one end of the plane mirror and / or the second image generating unit is connected to the display platform by a spring; The correction unit includes a drive motor and a rotating head. The drive motor drives the rotating head to rotate. The rotating head is attached to the other end of the plane mirror and / or the second image generation unit, and controls the plane mirror and / or the second image generation unit to rotate, so as to adjust the image position of the head-up display device on the windshield.

10. The means of transport as claimed in claim 8, characterized in that, The local heating component includes metal wires distributed in the heating area; the windshield is made of laminated glass, and the metal wires are embedded inside the outer layer of the laminated glass. The vehicle includes a quarter-wave plate disposed on the inner surface of the laminated glass, which overlaps with the image projected by the head-up display device. The correction unit is also used to control the angle between the plane mirror and / or the second image generation unit and the quarter-wave plate.

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