Virtual image picture size adjustable three focal plane light field AR-HUD

Abstract

The utility model discloses a kind of three focal plane light field AR-HUD with adjustable virtual image picture size, including distance farthest virtual image surface, middle distance virtual image surface, distance closest virtual image surface, automobile windshield, driver's eye, reflector one, reflector two, reflector three, image source and optical device;The image source is used to emit three different virtual image distance light rays, wherein one light ray is transmitted to reflector three with another light ray after optical device, and the last light ray is transmitted to reflector two, reflector two and reflector three project three light rays to reflector one, and then reflected into driver's eye through automobile windshield, so that driver can see three different distance pictures simultaneously.The utility model can realize three focal plane picture size adjustable, so that imaging picture is more hierarchical, effect is more integrated display, and the present scheme avoids the increase of cost through unique optical design, and has more advantages in price.

Description

Technical Field

[0001] This utility model belongs to the field of HUD technology, specifically relating to a trifocal light field AR-HUD with adjustable virtual image size. Background Technology

[0002] Existing HUD products primarily employ a single virtual image distance design. Whether it's the traditional W-HUD or the newer AR-HUD, neither can escape the limitation of a single distance. However, with the continuous advancement of HUD technology, AR-HUD products are gradually catching up with W-HUD in market share, becoming the mainstream trend. In actual consumer driving scenarios, if the distance to the vehicle in front is very close (such as when waiting at a red light in urban areas), the AR-HUD's projection distance causes the virtual image to merge with the vehicle in front, leading to driver discomfort. To address this issue and provide a better driving experience, some dual-focal-area HUD solutions exist on the market, mainly utilizing waveplates and polarizing films or using two PGUs. The main problems with this solution are: the addition of waveplates and polarizing films or multiple PGUs significantly increases costs, creating a cost disadvantage that hinders mass production; and the HUD's dual-focal-area image fails to achieve the display of more focal planes. Utility Model Content

[0003] (1) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a trifocal optical field AR-HUD with adjustable virtual image size. This aims to solve the problems of existing dual-focal HUD solutions, which mainly utilize waveplates and polarizing films or use two PGUs. The addition of waveplates and polarizing films or multiple PGUs increases costs and hinders mass production. Furthermore, the HUD's imaging image is dual-focal, failing to achieve the display of more focal planes.

[0005] (2) Technical solution

[0006] To solve the above-mentioned technical problems, this utility model provides a three-focal-plane light field AR-HUD with adjustable virtual image size, including the farthest virtual image plane, the middle-distance virtual image plane, the closest virtual image plane, the car windshield, the driver's eyes, a first reflector, a second reflector, a third reflector, an image source, and optical devices.

[0007] The image source is used to emit three rays of light at different virtual image distances. One ray of light passes through an optical device and is transmitted together with another ray of light to reflector three. The last ray of light is transmitted to reflector two. Reflector two and reflector three project the three rays of light together onto reflector one, and then they are reflected by the windshield of the car and enter the driver's eyes, so that the driver can see three images at different distances at the same time.

[0008] Preferably, the first reflector is a large freeform surface reflector.

[0009] Furthermore, the second reflector is a small freeform surface reflector.

[0010] Furthermore, the third reflector is a small freeform surface reflector.

[0011] Furthermore, the optical device is an adjustable optical path optical device.

[0012] Furthermore, the optical device is movable.

[0013] Furthermore, the image source is a PGU.

[0014] Beneficial effects

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This invention, through the coordinated arrangement of reflector one, reflector two, reflector three, image source, and optical components, enables adjustable image size across the three focal planes, resulting in a more layered and integrated image. Furthermore, this solution avoids increased costs through its unique optical design, making it more price-competitive. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the AR-HUD with adjustable virtual image size and three focal plane light field.

[0018] Figure 2 This is a schematic diagram of how the beam-expanding prism of this utility model expands collimated light rays.

[0019] The labels in the attached diagram are as follows: 1. Farthest virtual image plane; 2. Intermediate virtual image plane; 3. Closest virtual image plane; 4. Car windshield; 5. Driver's eye; 6. Mirror 1; 7. Mirror 2; 8. Mirror 3; 9. Image source; 10. Optical device. Detailed Implementation

[0020] This specific implementation is a trifocal light field AR-HUD with adjustable virtual image size, and its structural schematic diagram is shown below. Figures 1-2 As shown, it includes the farthest virtual image plane 1, the intermediate virtual image plane 2, the closest virtual image plane 3, the car windshield 4, the driver's eyes 5, the first reflector 6, the second reflector 7, the third reflector 8, the image source 9, and the optical device 10.

[0021] Image source 9 is used to emit three rays of light at different virtual image distances. One ray of light passes through optical device 10 and is transmitted together with another ray of light to reflector 3 8. The last ray of light is transmitted to reflector 2 7. Reflector 2 7 and reflector 3 8 project the three rays of light together onto reflector 1 6 and then reflect them through the car windshield 4 into the driver's eyes 5, so that the driver can see three images at different distances at the same time.

[0022] In this embodiment, reflector 6 is a large freeform surface reflector, reflector 7 is a small freeform surface reflector, reflector 8 is a small freeform surface reflector, image source 9 is a PGU, and optical device 10 is an adjustable optical path optical device. Light rays from three different virtual image distances are emitted from the same image source 9. The light rays from the farthest virtual image surface 1 are transmitted together with the light path from the intermediate virtual image surface 2 after passing through the adjustable optical path optical device 10, and then to reflector 8 of the small freeform surface reflector. The light rays from the closest virtual image surface 3 are emitted from image source 9 and transmitted to reflector 7 of the small freeform surface reflector. Then, the light rays from the three virtual image surfaces are projected together onto reflector 6 of the large freeform surface reflector and reflected by the windshield 4 into the driver's eyes 5, so that the driver can see three images at different distances at the same time.

[0023] In this embodiment, as Figure 2 As shown, the optical device 10 can be moved. During the movement, the amount of light passing through the optical device 10 changes continuously, and the size of the image displayed on the image source 9 is adjusted accordingly, thereby realizing that the screen size of the virtual image display is continuously adjustable.

[0024] In summary, this utility model, through the coordinated arrangement of reflector 6, reflector 7, reflector 8, image source 9, and optical device 10, can achieve adjustable image size across the three focal planes, resulting in a more layered and integrated image. Furthermore, this solution avoids increased costs through its unique optical design, making it more price-competitive.

[0025] All technical features in this embodiment can be freely combined according to actual needs.

[0026] 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 trifocal plane light field AR-HUD with adjustable virtual image size, characterized in that: It includes the farthest virtual image plane (1), the intermediate virtual image plane (2), the closest virtual image plane (3), the car windshield (4), the driver's eyes (5), the first reflector (6), the second reflector (7), the third reflector (8), the image source (9), and optical devices (10); The image source (9) is used to emit three rays of light at different virtual image distances. One ray passes through an optical device (10) and is transmitted together with another ray to the third reflector (8). The last ray is transmitted to the second reflector (7). The second reflector (7) and the third reflector (8) project the three rays together onto the first reflector (6) and then reflect them through the windshield (4) of the car and into the driver's eyes (5), so that the driver can see three images at different distances at the same time.

2. The AR-HUD with adjustable virtual image size and three focal plane light field according to claim 1, characterized in that, The first (6) of the reflectors is a large freeform surface reflector.

3. The AR-HUD with adjustable virtual image size and three focal plane light field according to claim 1, characterized in that, The second reflector (7) is a small freeform surface reflector.

4. The AR-HUD with adjustable virtual image size and three focal plane light field according to claim 1, characterized in that, The third (8) of the reflectors is a small freeform surface reflector.

5. The AR-HUD with adjustable virtual image size and three focal plane light field according to claim 1, characterized in that, The optical device (10) is an adjustable optical path optical device.

6. The AR-HUD with adjustable virtual image size and three focal plane light field according to claim 1, characterized in that, The optical device (10) is movable.

7. The AR-HUD with adjustable virtual image size and three focal plane light field according to claim 1, characterized in that, The image source (9) is a PGU.

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