Medium-free holographic suspension display system based on windshield
By employing a dual-mirror non-coaxial optical path design and freeform surface compensation technology, combined with a windshield reflective film, a floating display of images in the automotive VPA system is achieved, enhancing the user experience and human-computer interaction at a low cost.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU ZHIYUNGU AUTOMOTIVE ELECTRONIC TECH CO LTD
- Filing Date
- 2025-05-23
- Publication Date
- 2026-04-21
AI Technical Summary
Traditional automotive VPA systems rely on a single refraction path for imaging, which prevents the image from suspending in front of the viewer, resulting in a poor user experience.
By employing a non-coaxial optical path design with dual reflectors and freeform surface compensation technology, combined with a windshield reflective film, a Z-shaped optical path is formed, causing the real image to suspend in the air. Through the synergistic effect of the image source, the first reflector, the second reflector, and the windshield, the real image is displayed in a suspended state.
While maintaining system compactness, it improves human-computer interaction and user experience at a low cost.
Smart Images
Figure CN224153102U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of vehicle display technology, and in particular to a medium-free holographic floating display system based on a windshield. Background Technology
[0002] In recent years, with the rapid development of the automobile consumer market, private cars have become mainstream consumer goods for families, and the market size continues to expand. Under the wave of intelligentization, intelligent driving technology has become a core track for automakers to enhance their competitiveness, and optimizing user operation and enhancing the user experience through technological means has become an industry consensus. In automotive intelligent driving systems, technological innovation in the Visualized User Interface (VPA) is a key direction for improving user experience. Traditional VPA systems mostly use negative refractive glass to construct a simple refractive light path. Their imaging relies on a single refractive path, resulting in a simple light path design. Since the image does not pass through the windshield, it cannot float in front of the viewer's eyes. Utility Model Content
[0003] To address the aforementioned technical issues, this utility model discloses a medium-free holographic floating display system based on a windshield. By utilizing the synergistic effect of a non-coaxial optical path design with dual reflectors and freeform surface compensation technology, a real image can be clearly suspended in the air, allowing the driver to easily view a close-up real image during normal driving, greatly enhancing the human-computer interaction and user experience.
[0004] The technical solution of this utility model is as follows:
[0005] A medium-free holographic floating display system based on a windshield includes a windshield with a reflective film on its inner surface, and an image source, a first reflector, and a second reflector located below the windshield.
[0006] The first reflector is located on the side from which the image source light is emitted, and the second reflector is located on the side from which the light from the first reflector is emitted; the windshield is located on the side from which the light from the second reflector is emitted.
[0007] The image source is located between 1 and 2 times the optical focal length of the equivalent optical path of the optical system consisting of the image source, the first reflector, the second reflector, and the windshield. That is, the distance between the image source and the equivalent focal point of the equivalent optical path of the optical system is within the range of 1 to 2 times the equivalent focal length of the optical system.
[0008] The original light beam emitted by the image source is transmitted forward. After being reflected by the first reflector, the light beam is transmitted forward to the second reflector. After being reflected by the second reflector, the light beam is transmitted forward to the windshield. After being reflected again at the windshield, the light beam forms a real image visible to the human eye in the air. The real image is located between the human eye and the windshield.
[0009] As a further improvement of this utility model, the image source is a TFT, LCOS or DLP image display device.
[0010] As a further improvement of this utility model, the reflective film is a P-light reflective film or an S-light reflective film.
[0011] As a further improvement of this utility model, the reflective film is a coating or a laminate.
[0012] As a further improvement of this utility model, the first reflector and / or the second reflector is a concave reflector.
[0013] As a further improvement of this utility model, the first reflector is a spherical, aspherical, or freeform surface reflector, and the second reflector is a spherical, aspherical, or freeform surface reflector.
[0014] As a further improvement of this utility model, the first reflector is connected to the first rotating mechanism, and the second reflector is connected to the second rotating mechanism. Using this technical solution, the positions of the first and second reflectors can be adjusted so that drivers of different heights can observe a clear image in front of the windshield.
[0015] As a further improvement of this utility model, the real image is located in height between the windshield and the second reflector.
[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0017] Compared to the simple imaging using negative refractive glass in traditional VPAs, and also different from the virtual image optical path design of HUDs, the technical solution of this utility model adopts a Z-shaped optical path design. Through the synergistic effect of the non-coaxial optical path design of dual reflectors and freeform surface compensation technology, while maintaining the system's compactness, it adopts a real image optical path, setting the image source system between 1 and 2 times the optical focal length of the equivalent optical path of the optical system, so that the real image can be clearly suspended in front of the human eye, greatly improving the human-computer interaction and user experience; moreover, it is low in cost. Attached Figure Description
[0018] Figure 1 This is an optical path diagram of a medium-free holographic levitation display system based on a windshield, according to an embodiment of this utility model.
[0019] The reference numerals in the figures include:
[0020] 1-Image source, 2-First reflector, 3-Second reflector, 4-Windshield, 5-Real image, 6-Human eye. Detailed Implementation
[0021] The preferred embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.
[0022] like Figure 1 As shown, a medium-free holographic levitation display system based on a windshield includes an image source 1, a first reflector 2, a second reflector 3, and a windshield 4 with a reflective film on its inner surface. The image source 1, the first reflector 2, and the second reflector 3 are located below the windshield 4. The first reflector 2 is located on the light-emitting side of the image source 1, and the second reflector 3 is located on the light-emitting side of the first reflector 2. The windshield 4 is located on the light-emitting side of the second reflector 3. The image source 1 is located between 1 and 2 times the optical focal length of the equivalent optical path of the optical system formed by the image source 1, the first reflector 2, the second reflector 3, and the windshield 4.
[0023] The image source 1 can be any of a TFT, LCOS, or DLP image display device.
[0024] The inner surface of the windshield 4 is coated with a P-light reflective film or an S-light reflective film by various means, such as coating or applying a film.
[0025] The original light beam emitted from image source 1 is transmitted forward to the first reflector 2. After reaching the first reflection, it is reflected at the first reflector 2. The reflected light beam is transmitted forward to the second reflector 3. After reaching the second reflector 3, it is reflected again at the second reflector 3. The light beam is transmitted forward to the windshield 4. After reaching the windshield 4, it is reflected again at the windshield 4, forming a clear real image 5 visible to the human eye 6 in the air.
[0026] The first reflecting mirror 2 and the second reflecting mirror 3 are reflecting mirrors that use any type of surface shape, including but not limited to spherical, aspherical, and freeform surfaces.
[0027] The original light beam emitted from image source 1 is transmitted forward to the first reflector 2. After reaching the first reflector 2, it is reflected at the first reflector 2. The reflected light beam is transmitted forward to the second reflector 3. After reaching the second reflector 3, the light beam is reflected again at the second reflector 3. The light beam is transmitted forward to the windshield 4. After reaching the windshield 4, the light beam is reflected again at the windshield 4, forming a clear real image 5 visible to the human eye 6 in the air.
[0028] In this embodiment, the terms "first reflector 2" and "second reflector 3" are used for ease of description only and do not imply that only two mirrors and their corresponding order are used. More mirrors can be added and the optical path will still be valid.
[0029] The specific embodiments described above are preferred embodiments of this utility model, and are not intended to limit the specific scope of this utility model. The scope of this utility model includes, but is not limited to, these specific embodiments. All equivalent changes made in accordance with the shape and structure of this utility model are within the protection scope of this utility model.
Claims
1. A windshield-based, media-free holographic floating display system, characterized by: It includes a windshield with a reflective film on its inner surface, and an image source, a first reflector, and a second reflector located below the windshield; The first reflector is located on the side from which the image source light is emitted, and the second reflector is located on the side from which the light from the first reflector is emitted; the windshield is located on the side from which the light from the second reflector is emitted. The image source is located between 1 and 2 times the optical focal length of the equivalent optical path of the optical system consisting of the image source, the first reflector, the second reflector, and the windshield. The original light beam emitted by the image source is transmitted forward. After being reflected by the first reflector, the light beam is transmitted forward to the second reflector. After being reflected again by the second reflector, the light beam is transmitted forward to the windshield. After being reflected again at the windshield, the light beam forms a real image visible to the human eye in the air. The real image is located between the human eye and the windshield.
2. The windshield-based, media-less holographic floating display system of claim 1, wherein: The image source is a TFT, LCOS, or DLP image display device.
3. The medium-free holographic levitation display system based on a windshield according to claim 1, characterized in that: The reflective film is a P-light reflective film or an S-light reflective film.
4. The windshield-based, media-less holographic floating display system of claim 3, wherein: The reflective film is either a coating or a laminate.
5. The windshield-based, media-free holographic floating display system of claim 1, wherein: The first reflector and / or the second reflector are concave reflectors.
6. The windshield-based, media-less holographic floating display system of claim 5, wherein: The first reflector is a spherical, aspherical, or freeform surface reflector, and the second reflector is a spherical, aspherical, or freeform surface reflector.
7. The windshield-based, media-less holographic floating display system of claim 6, wherein: The first reflector is connected to the first rotating mechanism, and the second reflector is connected to the second rotating mechanism.
8. The windshield-based, media-free holographic floating display system of any of claims 1-7, wherein: The real image is located at a height between the windshield and the second reflector.