Head-up display system and vehicle
By introducing movable auxiliary optical elements and reflector assemblies into the vehicle-mounted head-up display system and adjusting the magnification of the virtual image, the problems of large system size and difficult imaging are solved, achieving the effect of large-size clear imaging and reduced size.
Patent Information
- Application Number
- CN202520370646.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-04
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-03-04
AI Technical Summary
Existing in-vehicle head-up display systems are bulky, making it difficult to achieve large-size, clear imaging within the limited space of the vehicle's center console.
By employing an image source device, a reflector assembly, and movable auxiliary optical elements, a virtual image is reflected through the windshield, and the magnification of the virtual image is adjusted by the auxiliary optical elements to achieve large-size clear imaging while reducing the system size.
While maintaining the virtual image magnification, the overall size of the head-up display system has been reduced, improving imaging quality and flexibility, and simplifying the structural design.
Smart Images
Figure CN223955890U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of vehicle head-up display technology, in particular to a head-up display system and a vehicle. BACKGROUND
[0002] A vehicle head-up display (HUD) is used to project vehicle information (vehicle speed, fuel consumption, vehicle condition monitoring, etc.) in front of the driver, which can make the driver's attention focused on the front and ensure driving safety. In order to realize long-distance and high-magnification projection of virtual images, the volume of the vehicle HUD system becomes larger and larger. However, the space of the vehicle center console is limited, which is not convenient for installation and is difficult to meet the requirement of realizing large-size clear imaging in the limited installation space. CONTENT OF THE UTILITY MODEL
[0003] The present application provides a head-up display system and a vehicle, which is beneficial to reduce the overall volume of the head-up display system.
[0004] The present application provides a head-up display system. The head-up display system comprises an image source device, the image source device being configured to output image source light. The head-up display system further comprises a mirror assembly, the mirror assembly being configured to reflect the image source light to a windshield of a vehicle, the image source light being reflected to a driver via the windshield so that the driver can observe a virtual image. The head-up display system further comprises an auxiliary optical element, the auxiliary optical element being movably arranged in a propagation path of the image source light, the auxiliary optical element being configured to assist in adjusting a magnification of the virtual image, the image source light being configured to propagate through the auxiliary optical element.
[0005] In an embodiment of the present application, the auxiliary optical element is movably arranged between the image source device and the mirror assembly, a distance between the auxiliary optical element and the image source device being configured to make the image source light propagate through the auxiliary optical element.
[0006] In an embodiment of the present application, a maximum length of a display area of the image source device is h, a divergence angle of the image source light is θ, an optical aperture of the auxiliary optical element is W, and a maximum distance between the auxiliary optical element and the image source device is D, which satisfy: W = h + 2Dtan(θ / 2).
[0007] In an embodiment of the present application, the maximum distance between the auxiliary optical element and the image source device is equal to a focal length of the auxiliary optical element.
[0008] In an embodiment of the present application, the mirror assembly comprises a first mirror and a second mirror, the image source light is reflected to the windshield through the first mirror and the second mirror in sequence, and the auxiliary optical element is movably arranged between the image source device and the first mirror.
[0009] In an embodiment of the present application, the focal length of the auxiliary optical element is f, the focal length of the first mirror is f1, and the following condition is met: 0.5≤|f1| / |f|≤1.8.
[0010] In an embodiment of the present application, the first mirror has negative optical power, the focal length of the first mirror is f1, the second mirror has positive optical power, the focal length of the second mirror is f2, and the following condition is met: 1≤|f1| / |f2|≤3.
[0011] In an embodiment of the present application, the focal length of the auxiliary optical element is f, the focal length of the optical system composed of the image source device, the mirror assembly, the auxiliary optical element, and the windshield glass is F, and the following condition is met: 1≤|f| / |F|≤3.
[0012] In an embodiment of the present application, the virtual image is configured to be converted between a first magnification and a second magnification by moving the auxiliary optical element, wherein the first magnification is smaller than the second magnification; when the magnification of the virtual image is converted to the first magnification, the focal length of the optical system composed of the image source device, the mirror assembly, the auxiliary optical element, and the windshield glass is Fn, and when the magnification of the virtual image is converted to the second magnification, the focal length of the optical system composed of the image source device, the mirror assembly, the auxiliary optical element, and the windshield glass is Fm, and the following condition is met: 1≤|Fm| / |Fn|≤1.4.
[0013] Correspondingly, the present application also provides a vehicle comprising a windshield and the head-up display system as described in the above embodiments.
[0014] The present application has the following beneficial effects: Different from the prior art, the present application provides a head-up display system and a vehicle. The head-up display system comprises an image source device and a mirror assembly, the mirror assembly reflects image source light to a windshield of the vehicle, the image source light is reflected by the windshield to a driver, so that the driver can observe a virtual image. The head-up display system further comprises an auxiliary optical element, the auxiliary optical element is movably arranged in the propagation path of the image source light, and the auxiliary optical element is used for assisting in adjusting the magnification of the virtual image, so that large-size clear imaging of the virtual image can be realized. Moreover, the image source light is configured to propagate through the auxiliary optical element, i.e., the image source light is received by the auxiliary optical element, which is conducive to reducing the overall volume of the head-up display system on the basis of ensuring the magnification of the virtual image. BRIEF DESCRIPTION OF DRAWINGS
[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort.
[0016] Figure 1 is a schematic diagram of working principle of an embodiment of the head-up display system of the present application;
[0017] Figure 2 is Figure 1 is a schematic diagram of adjusting magnification of a virtual image of the head-up display system shown in the figure;
[0018] Figure 3 is a schematic diagram of an embodiment of the image source device and auxiliary optical element of the present application.
[0019] Explanation of reference signs:
[0020] 10 head-up display system; 11 image source device; 12 mirror assembly; 121 first mirror; 122 second mirror; 13 auxiliary optical element; 20 windshield. DETAILED DESCRIPTION
[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise stated and limited, the terms such as "connected", "connected", "stacked" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0022] In the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "stacked" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0023] The present application provides a head-up display system and a vehicle, which are described in detail below. It should be noted that the description order of the following embodiments is not limited as the preferred order of the embodiments of the present application. In the following embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.
[0024] To solve the technical problem of large volume of the vehicle HUD system in the prior art, an embodiment of the present application provides a head-up display system. The head-up display system comprises an image source device, the image source device is configured to output image source light. The head-up display system further comprises a mirror assembly, the mirror assembly is configured to reflect the image source light to the windshield of the vehicle, and the image source light is reflected to the driver via the windshield, so that the driver can observe the virtual image. The head-up display system further comprises an auxiliary optical element, the auxiliary optical element is movably arranged in the propagation path of the image source light, and the auxiliary optical element is configured to assist in adjusting the magnification of the virtual image. The image source light is configured to propagate through the auxiliary optical element. Details are described below.
[0025] Please refer to Figure 1 and Figure 2 , Figure 1 is a schematic diagram of the working principle of an embodiment of the head-up display system of the present application, Figure 2 is Figure 1 a schematic diagram of an embodiment of adjusting the magnification of the virtual image of the head-up display system shown in
[0026] In an embodiment, the vehicle comprises a windshield 20 and a head-up display system 10, the head-up display system 10 projects vehicle information into the driver's forward field of view through the windshield 20. Specifically, the head-up display system 10 comprises an image source device 11 and a mirror assembly 12, the image source device 11 is configured to output image source light 14, and the mirror assembly 12 is configured to reflect the image source light 14 to the windshield 20 of the vehicle. The image source light 14 is reflected to the driver via the windshield 20, so that the driver can observe the virtual image 15, and the vehicle information is projected into the driver's forward field of view.
[0027] The head-up display system 10 further comprises an auxiliary optical element 13, the auxiliary optical element 13 is movably arranged in the propagation path of the image source light 14, and the auxiliary optical element 13 is configured to assist in adjusting the magnification of the virtual image 15. The image source light 14 is configured to propagate through the auxiliary optical element 13.
[0028] In the above manner, the auxiliary optical element 13 of the present embodiment is movably arranged in the propagation path of the image source light 14, and the auxiliary optical element 13 can assist in adjusting the magnification of the virtual image 15, so that large-size clear imaging of the virtual image 15 can be realized. By introducing the auxiliary optical element 13, the factors affecting imaging are increased, the degree of freedom is increased, and the imaging quality and the correction of aberration are more conducive to improvement. Moreover, the image source light 14 is configured to propagate through the auxiliary optical element 13, that is, the image source light 14 is received by the auxiliary optical element 13. On the basis of ensuring the magnification of the virtual image 15, it is conducive to reducing the overall volume of the head-up display system 10.
[0029] In an embodiment, the auxiliary optical element 13 is movably arranged between the image source device 11 and the mirror assembly 12, and the distance between the auxiliary optical element 13 and the image source device 11 is configured such that the image source light rays 14 all propagate through the auxiliary optical element 13. The distance between the auxiliary optical element 13 and the image source device 11 in this embodiment is adjustable to assist in adjusting the magnification of the virtual image 15. By adjusting the distance between the auxiliary optical element 13 and the image source device 11, the magnification of the virtual image 15 projected by the head-up display system 10 can be varied within a certain range, realizing the zoom function. Figure 2 The auxiliary optical element 13 in the dashed line and the solid line shows the auxiliary optical element 13 before and after movement. This embodiment avoids the complex zoom system and the focusing of the cam mechanism, and is conducive to simplifying the structure of the head-up display system 10. Moreover, by reasonably setting the distance between the auxiliary optical element 13 and the image source device 11, it can be ensured that the image source light rays 14 are all received by the auxiliary optical element 13, which is conducive to reducing the overall volume of the head-up display system 10 on the basis of ensuring the magnification of the virtual image 15.
[0030] Specifically, referring to Figure 3 , the maximum length of the display area of the image source device 11 is h, the divergence angle of the image source light rays 14 is θ, the clear aperture of the auxiliary optical element 13 is W, and the maximum distance between the auxiliary optical element 13 and the image source device 11 is D, which satisfies: W = h + 2Dtan(θ / 2). In this way, when the distance between the auxiliary optical element 13 and the image source device 11 reaches the maximum value, the image source light rays 14 output by the image source device 11 are all received by the auxiliary optical element 13, which maximally reduces the loss of the image source light rays 14. Moreover, on the basis of ensuring the magnification of the virtual image 15, the auxiliary optical element 13 allows a smaller clear aperture to be set, which is conducive to reducing the volume of the auxiliary optical element 13, and further conducive to reducing the overall volume of the head-up display system 10. The image source device 11 can be a PGU (Picture Generation Unit) or the like, and the maximum length of the display area of the image source device 11 can be the diagonal length of the display area of the image source device 11 or the like.
[0031] The auxiliary optical element 13 in this embodiment is a transmissive optical element, such as a lens or the like. The maximum distance between the auxiliary optical element 13 and the image source device 11 is equal to the focal length of the auxiliary optical element 13. By compressing the optical path through the auxiliary optical element 13, this embodiment can realize large-size clear imaging with a smaller image source, avoids a significant increase in the volume of the entire head-up display system 10, solves the problem that the small volume and large-size imaging of the head-up display system 10 are difficult to be balanced, and improves the flexibility of the head-up display system 10.
[0032] In an embodiment, the mirror assembly 12 comprises a first mirror 121 and a second mirror 122, the image source light 14 is reflected by the first mirror 121 and the second mirror 122 in sequence to the windshield 20, and the auxiliary optical element 13 is movably arranged between the image source device 11 and the first mirror 121. It can be understood that the types of the curved mirrors of the first mirror 121 and the second mirror 122 can be free curved mirrors, aspheric mirrors, etc., which are not limited herein.
[0033] Of course, in other embodiments of the present application, the auxiliary optical element 13 can also be arranged between the first mirror 121 and the second mirror 122, or the auxiliary optical element 13 is arranged between the mirror assembly 12 and the windshield 20, which is not limited herein.
[0034] In an embodiment, the focal length of the auxiliary optical element 13 is f, the focal length of the first mirror 121 is f1, and it satisfies: 0.5≤|f1| / |f|≤1.8, for example, |f1| / |f| can be 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, etc. Further, the focal length of the auxiliary optical element 13 and the focal length of the first mirror 121 also satisfy: 0.7≤|f1| / |f|≤1.4. In this way, by reasonably setting the focal length of the auxiliary optical element 13 and the focal length of the first mirror 121, the focal length of the auxiliary optical element 13 and the focal length of the first mirror 121 are relatively close, so that the light is smoother, which is beneficial to improve the imaging quality.
[0035] In an embodiment, the first mirror 121 has a negative optical power, the second mirror 122 has a positive optical power, the focal length of the second mirror 122 is f2, and it satisfies: 1≤|f1| / |f2|≤3, for example, |f1| / |f2| can be 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3.0, etc. Further, the focal length of the first mirror 121 and the focal length of the second mirror 122 also satisfy: 1.2≤|f1| / |f2|≤2. In this way, by reasonably setting the focal length of the first mirror 121 and the focal length of the second mirror 122, the focal length of the first mirror 121 and the focal length of the second mirror 122 are relatively close, so that the light is smoother, which is beneficial to improve the imaging quality.
[0036] In an embodiment, the focal length of the optical system composed of the image source device 11, the mirror assembly 12, the auxiliary optical element 13, and the windshield 20 is F, which satisfies: 1≤|f| / |F|≤3, for example, |f| / |F| can be 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3.0, etc. Further, the focal length of the auxiliary optical element 13 and the focal length of the optical system composed of the image source device 11, the mirror assembly 12, the auxiliary optical element 13, and the windshield 20 also satisfy: 1.5≤|f| / |F|≤2.5. In this way, the embodiment reasonably sets the focal length of the auxiliary optical element 13 and the focal length of the optical system composed of the image source device 11, the mirror assembly 12, the auxiliary optical element 13, and the windshield 20, which is conducive to improving the imaging quality and has the function of correcting the aberration of the optical system (astigmatism, distortion, etc.).
[0037] In an embodiment, the virtual image 15 is configured to be converted between a first magnification and a second magnification by moving the auxiliary optical element 13, where the first magnification is less than the second magnification. In other words, when the magnification of the virtual image 15 is converted to the first magnification, the virtual image 15 is in a small magnification imaging state; when the magnification of the virtual image 15 is converted to the second magnification, the virtual image 15 is in a large magnification imaging state.
[0038] When the magnification of the virtual image 15 is converted to the first magnification, the focal length of the optical system composed of the image source device 11, the mirror assembly 12, the auxiliary optical element 13, and the windshield 20 is Fn, and when the magnification of the virtual image 15 is converted to the second magnification, the focal length of the optical system composed of the image source device 11, the mirror assembly 12, the auxiliary optical element 13, and the windshield 20 is Fm, which satisfies: 1≤|Fm| / |Fn|≤1.4, for example, |Fm| / |Fn| can be 1.0, 1.1, 1.2, 1.3, 1.4, etc. Further, it also satisfies: 1≤|Fm| / |Fn|≤1.2. In this way, the embodiment reasonably sets the overall focal length of the optical system under small magnification and the overall focal length of the optical system under large magnification, which can realize the size change of the virtual image 15 when responding to different FOV (Field of View, field of view) scenes, and is conducive to AR-HUD (Augmented Reality Head-up Display, augmented reality head-up display) real scene fusion.
[0039] In summary, the application provides a head-up display system and a vehicle. The head-up display system comprises an image source device and a mirror assembly, the mirror assembly reflects the image source light to the windshield of the vehicle, the image source light is reflected to the driver through the windshield, so that the driver can observe the virtual image. The head-up display system further comprises an auxiliary optical element, the auxiliary optical element is movably arranged in the propagation path of the image source light, and the auxiliary optical element is used to assist in adjusting the magnification of the virtual image, so that large-size clear imaging of the virtual image can be realized. Moreover, the image source light is configured to propagate through the auxiliary optical element, that is, the image source light is received by the auxiliary optical element, which is conducive to reducing the overall volume of the head-up display system on the basis of ensuring the magnification of the virtual image.
[0040] The head-up display system and the vehicle provided by the application are described in detail above, and the principles and implementation modes of the application are described by applying specific examples. The above description of the examples is only used to help understand the method of the application and its core idea; at the same time, for those skilled in the art, according to the idea of the application, the specific implementation mode and application range will be changed, and the above description should not be understood as a limitation of the application.
Claims
1. A head-up display system, characterized by, Comprise: an image source device configured to output image source light rays; a mirror assembly configured to reflect the image source light rays to a windshield of a vehicle, the image source light rays being reflected via the windshield to a driver such that the driver is able to observe a virtual image; and an auxiliary optical element movably disposed in a propagation path of the image source light rays, the auxiliary optical element configured to assist in adjusting a magnification of the virtual image, the image source light rays being configured to propagate through the auxiliary optical element; a maximum length of a display area of the image source device is h, a divergence angle of the image source light rays is θ, an entrance pupil of the auxiliary optical element is W, and a maximum distance between the auxiliary optical element and the image source device is D, satisfying: W = h + 2Dtan(θ / 2); a focal length of the auxiliary optical element is f, and a focal length of an optical system composed of the image source device, the mirror assembly, the auxiliary optical element, and the windshield is F, satisfying: 1≤|f| / |F|≤3. 2.The head-up display system of claim 1, wherein the auxiliary optical element is movably disposed between the image source device and the mirror assembly, and a distance between the auxiliary optical element and the image source device is configured such that the image source light rays propagate through the auxiliary optical element. 3.The head-up display system of claim 2, wherein a maximum distance between the auxiliary optical element and the image source device is equal to a focal length of the auxiliary optical element. 4.The head-up display system of claim 2, wherein the mirror assembly comprises a first mirror and a second mirror, the image source light rays are reflected to the windshield by the first mirror and the second mirror in sequence, and the auxiliary optical element is movably disposed between the image source device and the first mirror. 5.The head-up display system of claim 4, wherein a focal length of the auxiliary optical element is f, and a focal length of the first mirror is f1, satisfying: 0.5≤|f1| / |f|≤1.
8. 6.The head-up display system of claim 4, wherein the first mirror has a negative optical power, a focal length of the first mirror is f1, the second mirror has a positive optical power, and a focal length of the second mirror is f2, satisfying: 1≤|f1| / |f2|≤3. 7.The head-up display system of claim 1, wherein the virtual image is configured to be converted between a first magnification and a second magnification by moving the auxiliary optical element, wherein the first magnification is less than the second magnification. When the magnification of the virtual image is converted to the first magnification, the focal length of the optical system composed of the image source device, the mirror assembly, the auxiliary optical element, and the windshield is Fn, and when the magnification of the virtual image is converted to the second magnification, the focal length of the optical system composed of the image source device, the mirror assembly, the auxiliary optical element, and the windshield is Fm, and the following is satisfied: 1≤|Fm| / |Fn|≤1.
4.
8. A vehicle characterized by comprising: A head-up display system comprising a windshield and a head-up display system according to any one of claims 1 to 7.