A new type of light field AR-HUD system of four focal plane image display
Patent Information
- Application Number
- CN202521720050.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-12
- Publication Date
- 2026-09-04
- Estimated Expiration
- 2035-08-12
AI Technical Summary
[0005]针对现有技术的不足，本实用新型的目的在于提供一种四焦面图像显示的新型光场AR-HUD系统，旨在解决现有技术中现有的双焦面HUD的方案，主要利用了波片及偏振膜，加入了波片和偏振膜的原因导致成本提升不利于量产的推广；HUD的成像画面为双焦面，未能实现更多的焦面显示的问题
[0015]与现有技术相比，本实用新型的有益效果在于：
Smart Images
Figure CN224720312U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of HUD technology, specifically relating to a novel light field AR-HUD system for displaying images on four focal planes. Background Technology
[0002] In existing HUD products, the mainstream design is still based on a single virtual image distance. Whether it is the traditional W-HUD or the more advanced AR-HUD, they cannot get rid of the limitation of a single distance. With the continuous development of HUD technology, the number of AR-HUD products has gradually surpassed that of W-HUD, becoming the market trend. However, in actual driving scenarios, when the following distance is close, AR-HUD, due to its long projection distance, causes the projected virtual image to overlap with the vehicle in front, making the driver's vision confusing and causing discomfort. Therefore, a new type of AR-HUD that can display more virtual image distances at the same time has emerged.
[0003] Currently, there are a few dual-view AR-HUDs on the market, which mainly utilize waveplates and polarizing films. The main problems with this solution are: the addition of waveplates and polarizing films greatly increases the cost, resulting in a certain cost disadvantage and hindering mass production and promotion; the HUD's imaging screen has two focal planes, failing to achieve the display of more focal planes. Utility Model Content
[0004] (1) Technical problems to be solved
[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a novel light field AR-HUD system with four focal plane image display. This system aims to solve the problem that existing dual-focal-plane HUD solutions mainly utilize waveplates and polarizing films. The addition of waveplates and polarizing films increases costs and hinders mass production. Furthermore, the HUD's imaging image is dual-focal-plane, failing to achieve the display of more focal planes.
[0006] (2) Technical solution
[0007] To address the aforementioned technical problems, this utility model provides a novel light field AR-HUD system with four focal plane image display, comprising a first distance virtual image plane, a second distance virtual image plane, a third distance virtual image plane, a fourth distance virtual image plane, a windshield, a human eye, a third reflector, a second reflector, a first reflector, an image source, and optical components; the image source is used to emit light from the first distance virtual image plane, the second distance virtual image plane, the third distance virtual image plane, and the fourth distance virtual image plane;
[0008] The light rays from the first and second distance virtual image surfaces are transmitted to the first reflecting mirror after passing through optical devices. The light rays from the third distance virtual image surface are directly transmitted to the first reflecting mirror, and the light rays from the fourth distance virtual image surface are transmitted to the second reflecting mirror. The three light rays reflected by the first reflecting mirror and the light rays reflected by the second reflecting mirror are jointly projected onto the third reflecting mirror and then reflected by the windshield into the human eye, so that the driver can see the fourth, third, second, and first distance virtual image surfaces at the same time.
[0009] Preferably, the image source is a PGU.
[0010] Furthermore, the first reflector is a freeform surface reflector.
[0011] Furthermore, the second reflector is a freeform surface reflector.
[0012] Furthermore, the optical device is provided in two parts, and the light rays from the first distance virtual image plane and the second distance virtual image plane are transmitted to the first reflecting mirror after passing through the optical device at the corresponding position.
[0013] Furthermore, the optical device is an adjustable optical path optical device.
[0014] Beneficial effects
[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0016] This invention utilizes a combination of a first distance virtual image plane, a second distance virtual image plane, a third distance virtual image plane, a fourth distance virtual image plane, a windshield, a human eye, a third reflector, a second reflector, a first reflector, an image source, and optical components to achieve a four-focal-plane display. This results in a more layered and integrated image. Furthermore, the optical design of this solution avoids increased costs and offers a price advantage. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the present invention.
[0018] Figure 2 This is a schematic diagram of the image distribution of the image source of this utility model.
[0019] Figure 3 This is a schematic diagram showing the positional correspondence between the optical device and the image source partition of this utility model.
[0020] The labels in the attached diagram are as follows: 1. First distance virtual image plane; 2. Second distance virtual image plane; 3. Third distance virtual image plane; 4. Fourth distance virtual image plane; 5. Windshield; 6. Human eye; 7. Third reflector; 8. Second reflector; 9. First reflector; 10. Image source; 11. Optical device. Detailed Implementation
[0021] This specific embodiment is a novel light field AR-HUD system for displaying images on four focal planes, and its structural schematic diagram is shown below. Figures 1-3 As shown, it includes a first distance virtual image plane 1, a second distance virtual image plane 2, a third distance virtual image plane 3, a fourth distance virtual image plane 4, a windshield 5, a human eye 6, a third reflector 7, a second reflector 8, a first reflector 9, an image source 10, and optical devices 11; the image source 10 is used to emit light from the first distance virtual image plane 1, the second distance virtual image plane 2, the third distance virtual image plane 3, and the fourth distance virtual image plane 4, wherein the fourth distance virtual image plane 4 is the closest distance virtual image plane;
[0022] Image source 10 is used to emit four rays of light at different virtual image distances. Two rays pass through two optical devices 11 and are then transmitted together with another ray to the first reflector 9. The last ray is transmitted to the second reflector 8. The first reflector 9 and the second reflector 8 project the four rays together onto the third reflector 7 and then reflect them through the windshield 5 of the car into the driver's eye 6, so that the driver can see four images at different distances at the same time.
[0023] In this embodiment, the image source 10 is a PGU, the first reflector 9 is a freeform surface reflector, and the second reflector 8 is a freeform surface reflector.
[0024] In this embodiment, as Figure 2 The diagram shows the image distribution of image source 10. The entire image display area of image source 10 is divided into four different distances: a first distance image display area, a second distance image display area, a third distance image display area, and a closest distance image display area. The image on image source 10 is reasonably allocated. Through this partitioning setting, image source 10 can emit light from the first distance virtual image surface 1, the second distance virtual image surface 2, the third distance virtual image surface 3, and the fourth distance virtual image surface 4.
[0025] Four light rays at different virtual image distances are emitted from the same image source 10, specifically:
[0026] The first distance display area emits light from the first distance virtual image surface 1, the second distance display area emits light from the second distance virtual image surface 2, the third distance display area emits light from the third distance virtual image surface 3, and the closest distance display area emits light from the fourth distance virtual image surface 4.
[0027] The light rays from the first distance virtual image surface 1 and the second distance virtual image surface 2 are transmitted to the first reflector 9 after passing through the optical device 11. The light rays from the third distance virtual image surface 3 are directly transmitted to the first reflector 9. The light rays from the fourth distance virtual image surface 4 are transmitted to the second reflector 8. The three light rays reflected by the first reflector 9 and the light rays reflected by the second reflector 8 are jointly projected onto the third reflector 7 and then reflected by the windshield 5 into the human eye 6, so that the driver can see four images at different distances at the same time. That is, the driver can see the fourth distance virtual image surface 4, the third distance virtual image surface 3, the second distance virtual image surface 2 and the first distance virtual image surface 1 at the same time.
[0028] In this embodiment, the optical device 11 is an adjustable optical path optical device, and as shown in the figure... Figure 3 As shown, there are two optical devices 11. The light emitted from the first distance virtual image surface 1 at the first distance from the screen display area and the light emitted from the second distance virtual image surface 2 at the second distance from the screen display area pass through the optical devices 11 at the corresponding positions and then propagate to the first reflector 9. When the light from the first distance virtual image surface 1 and the second distance virtual image surface 2 passes through the optical devices 11, the amount of light will change.
[0029] In summary, this utility model, through the coordinated arrangement of a first distance virtual image plane 1, a second distance virtual image plane 2, a third distance virtual image plane 3, a fourth distance virtual image plane 4, a windshield 5, a human eye 6, a third reflector 7, a second reflector 8, a first reflector 9, an image source 10, and optical devices 11, can achieve a four-focal-plane display, resulting in a more layered and integrated image. Furthermore, the optical design of this solution avoids increased costs, making it more cost-effective.
[0030] All technical features in this embodiment can be freely combined according to actual needs.
[0031] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.
Claims
1. A novel light field AR-HUD system for displaying images on four focal planes, characterized in that: It includes a first distance virtual image surface (1), a second distance virtual image surface (2), a third distance virtual image surface (3), a fourth distance virtual image surface (4), a windshield (5), a human eye (6), a third reflector (7), a second reflector (8), a first reflector (9), an image source (10), and optical devices (11); the image source (10) is used to emit light from the first distance virtual image surface (1), the second distance virtual image surface (2), the third distance virtual image surface (3), and the fourth distance virtual image surface (4); The light rays from the first distance virtual image surface (1) and the second distance virtual image surface (2) are transmitted to the first reflector (9) after passing through the optical device (11), the light rays from the third distance virtual image surface (3) are directly transmitted to the first reflector (9), and the light rays from the fourth distance virtual image surface (4) are transmitted to the second reflector (8). The three light rays reflected by the first reflector (9) and the light rays reflected by the second reflector (8) are projected together onto the third reflector (7) and then reflected by the windshield (5) into the human eye (6), so that the driver can see the fourth distance virtual image surface (4), the third distance virtual image surface (3), the second distance virtual image surface (2) and the first distance virtual image surface (1) at the same time.
2. The novel light field AR-HUD system for four-focal-plane image display according to claim 1, characterized in that, The image source (10) is a PGU.
3. The novel light field AR-HUD system for four-focal-plane image display according to claim 1, characterized in that, The first reflector (9) is a freeform reflector.
4. The novel light field AR-HUD system for four-focal-plane image display according to claim 1, characterized in that, The second reflector (8) is a freeform surface reflector.
5. The novel light field AR-HUD system for four-focal-plane image display according to claim 1, characterized in that, Two optical devices (11) are provided. The light rays from the first distance from the virtual image surface (1) and the second distance from the virtual image surface (2) are transmitted to the first reflecting mirror (9) after passing through the optical devices (11) at the corresponding positions.
6. The novel light field AR-HUD system for four-focal-plane image display according to claim 3, characterized in that, The optical device (11) is an adjustable optical path optical device.