HUD SYSTEM AND METHOD FOR HUD IMAGE GENERATION

Abstract

An HUD system, includes at least one first HUD device, namely an AR-HUD device, with at least one first image source for displaying a first image produced by at least one hologram in a first display section of a display region and at least one second HUD device with at least one second image source for displaying a second image produced using geometric projection optics in a second display section of the display region.

Claims

1. HUD system, comprising at least one first HUD device, which is an AR-HUD device, with at least one first image source for displaying a first image produced by means of at least one hologram in a first display section of a display region and at least one second HUD device with at least one second image source for displaying a second image produced using geometric projection optics in a second display section of the display region.

2. The HUD system according to claim 1, wherein the first and the second display section partially overlap or are separated from one another.

3. The HUD system according to claim 1, wherein the display region is defined by a vehicle window.

4. The HUD system according to claim 1, wherein the second image has at least one status display.

5. The HUD system according to claim 1, wherein the first image includes at least one marking of an element of a vehicle environment, another road user, and/or a navigation instruction on a surface of the vehicle environment.

6. The HUD system according to claim 1, wherein the first image or an element of the first image can be produced at a first projection distance and the second image or an element of the second image can be produced at a second projection distance, wherein the first projection distance is greater than the second projection distance.

7. The HUD system according to claim 1, wherein an image can be produced at a projection distance of at least 5 m as the first image or as an element of the first image, and/or an image can be produced at a projection distance of at most 4.5 m as the second image or as an element of the second image.

8. The HUD system according to claim 1, wherein a wedge device is introduced into the display region.

9. The HUD system according to claim 1, wherein the first and second HUD devices are accommodated at least partially in a common structural unit and/or have at least one common component.

10. Vehicle, including an HUD system according to claim 1.

11. Method for HUD image generation, comprising: generating a first image which is an AR-HUD image, using at least one hologram, and generating a second image, without using a hologram.

12. The method according to claim 11, wherein the first image or an element of the first image is produced at a first projection distance and the second image or an element of the second image is produced at a second projection distance, wherein the first projection distance is greater than the second projection distance.

13. The method according to claim 11, wherein an image is produced at a projection distance of at least 5 m as the first image or as an element of the first image, and/or an image is produced at a projection distance of at most 4.5 m as the second image or as an element of the second image.

14. The HUD system according to claim 3, wherein the display region is defined by a windshield.

15. The HUD system according to claim 4, wherein the at least one status display is for displaying a speed, a mileage, an engine speed, a temperature, and/or a fuel gauge.

16. The HUD system according to claim 5, wherein the at least one marking relates to a lane boundary, a pedestrian, another vehicle, and/or a traffic lane.

17. The HUD system according to claim 7, wherein the image is produced at a projection distance of at least 10 m as the first image or as an element of the first image, and/or the image is produced at a projection distance of at most 2.5 m as the second image or as an element of the second image.

18. The HUD system according to claim 8, wherein the wedge device is a wedge film that is introduced into the first display section.

19. The HUD system according to claim 9, wherein the common structural unit is a common projector and the at least one common component is a common reflector and/or a common lens.

20. The HUD system according to claim 19, wherein the common reflector is an aspherical mirror.

21. The method according to claim 13, wherein the image is produced at a projection distance of at least 10 m as the first image or as an element of the first image, and/or the image is produced at a projection distance of at most 2.5 m as the second image or as an element of the second image.

Description

[0039] The invention is explained in detail with reference to a drawing. The drawing is a schematic representation and is not to scale. The drawing in no way restricts the invention.

[0040] It depicts:

[0041] FIG. 1 a schematic view of an HUD system according to the invention.

[0042] A projector 10 includes a first image source 11 and a second image source 12. The first image source 11 sends beams via a first beam path 13, depicted by way of example, in the direction of a holographic film 14 in a windshield 15 of a vehicle (not shown in its entirety). A hologram is stored in the holographic film (in particular the polymer film) 14. In a manner analogous to that of an HUD system with conventional optics, an image is produced in the projector 10, magnified by flat and concave mirrors (not shown in detail), and deflected toward the pane. When (for example, via the beam path 13) this light strikes the film 14 (hologram film) integrated into the pane, it is diffracted on interference patterns that are stored in the hologram film. Here, the holographic film 14 also assumes the function of a concave mirror since the (virtual) HUD image can be magnified many times over. The installation space (for example, in the dashboard) required for a specific (virtual) image size drops accordingly since the flat and concave mirrors in the projector 10 (not shown in detail) can be designed smaller than in the case of an HUD with (purely) conventional optics. The holographic film 14 and the windshield 15 takes over a large part of the image magnification. The viewer's head is schematically illustrated by the reference character 18. The use of a wedge device (e.g., wedge film) is not necessary for this holographic image generation.

[0043] In parallel, a second image source 12, for which, at least partially, the same mirrors can be used in the projector as for the first image source 11 (e.g., a last aspherical mirror), is also provided in the projector 10. Since image size and image width are comparatively small in the standard HUD, the installation space requirement does not increase (or hardly increases). The light from the second image source 12 is also deflected via a second beam path 16 onto the windshield windshield 15, and, specifically, via a concave mirror 17. Furthermore, a wedge-shape is introduced into the windshield 15 (for example, via a wedge film, as described in WO 2016/198678 A1). However, this wedge shape does not adversely affect the function of the HOE-HUD.

[0044] Images from the first image source can be displayed in a first display section 19. Images from the second image source can be displayed in a second display section 20.

[0045] As a result, with this combination of HOE-HUD and HUD with conventional optics, a hybrid HUD satisfying high requirements can be produced.

LIST OF REFERENCE CHARACTERS

[0046] 10 projector [0047] 11 first image source [0048] 12 second image source [0049] 13 first beam path [0050] 14 holographic film [0051] 15 windshield [0052] 16 second beam path [0053] 17 concave mirror [0054] 18 viewer [0055] 19 first display section [0056] 20 second display section