Display device including a combiner with asymmetrical magnification

Abstract

To provide a display device that includes a combiner with an asymmetric magnification ratio.SOLUTION: A display device includes a video formation device that forms virtual video, and a combiner that provides an observer with the virtual video and light including an outside landscape that are mixed. The combiner may include a curve surface that changes the size of the virtual image at a first magnification ratio in a first direction and at about a second magnification ratio that is smaller than the first magnification ratio in a second direction that is perpendicular to the first direction.SELECTED DRAWING: Figure 1

Claims

1. A video forming apparatus for forming virtual images, A combiner that mixes light corresponding to the external environment with the virtual image and provides it to the observer, Includes, The combiner includes a curved surface that changes the size of the virtual image by a first magnification in the first direction and by a second magnification smaller than the first magnification in the second direction perpendicular to the first direction. The combiner includes a transparent waveguide for transmitting the virtual image, and the curved surface is formed on the surface of the transparent waveguide. The transparent waveguide includes a first surface and a second surface arranged opposite to each other, and a third surface and a fourth surface arranged opposite to each other between the first surface and the second surface. The curved surface includes a first curved surface formed on the first surface and a second curved surface formed on the second surface. A display device in which the third and fourth surfaces are arranged parallel to each other so as not to have refractive power.

2. The first and second surfaces are, In the first direction, a first principal plane is formed at a first position on the optical axis, and a focal plane is formed at a second position on the optical axis. The display device according to claim 1, having a cross section along the second direction that forms a second principal plane at a third position on the optical axis that is different from the first position on the optical axis, and forms a focal plane at the second position on the optical axis.

3. The display device according to claim 1, wherein the first and second curved surfaces have a width narrower than the overall width of the combiner in the second direction.

4. The image forming apparatus is arranged to provide the virtual image toward the first surface, The display device according to claim 1, wherein the first surface is arranged such that a virtual image transmitted through the first surface travels inside the transparent waveguide.

5. The display device according to claim 1, wherein the image forming apparatus is positioned opposite a portion of the third surface, and the first surface is positioned to reflect a virtual image transmitted through the third surface.

6. The display device according to claim 1, wherein the image forming apparatus is positioned opposite a portion of the fourth surface, and the first surface is positioned to reflect a virtual image transmitted through the fourth surface.

7. The combiner further includes a light-transmitting plate, and the light-transmitting plate is A fifth surface that is in contact with the second surface and has a shape complementary to the second curved surface formed on the second surface, The third surface and the sixth surface extending from the fourth surface, The third surface and the seventh surface extending from the fourth surface, The display device according to claim 1, including the following:

8. The display device according to claim 1, wherein the first surface is a flat inclined surface.

9. The combiner further includes a light-transmitting plate, and the light-transmitting plate is A fifth surface that is tangent to the aforementioned curved surface and has a shape complementary to the aforementioned curved surface, The sixth surface extending from the third and fourth surfaces, The third surface and the fourth surface mentioned above, and the seventh surface extending from them, The display device according to claim 8, further comprising a light-transmitting plate.

10. The image forming apparatus is arranged to provide the virtual image toward the first surface, The display device according to claim 8, wherein the first surface is arranged such that a virtual image transmitted through the first surface travels inside the transparent waveguide.

11. The display device according to claim 8, wherein the image forming apparatus is positioned opposite a portion of the third surface, and the first surface is positioned to reflect a virtual image transmitted through the third surface.

12. The system further includes a projection optical system disposed between the image forming apparatus and the third surface, The curved surface and the projection optical system are, In the first direction, a first principal plane is formed at a first position on the optical axis, and a focal plane is formed at a second position on the optical axis. The display device according to claim 11, wherein a second principal plane is formed in a second direction at a third position on the optical axis that is different from the first position, and a focal plane is formed at the second position on the optical axis.

13. The display device according to claim 1, wherein the image forming apparatus is arranged to provide the virtual image toward the first surface.

14. The display apparatus according to claim 13, wherein the combiner further includes a diffraction pattern arranged in a portion of the fourth surface and reflecting the virtual image toward the third surface.

15. The display apparatus according to claim 14, wherein the diffraction pattern includes a first surface that reflects light corresponding to the virtual image incident at an angle in the normal direction and a second surface that transmits light corresponding to the external environment incident perpendicularly.

16. The display device according to claim 14, wherein the diffraction pattern is a holographic optical element, a diffractive optical element, or a metasurface.

17. The image forming apparatus is arranged to provide the virtual image toward the curved surface, The display device according to claim 1, further comprising a projection optical system disposed between the image forming apparatus and the curved surface.

18. The display apparatus according to claim 7 or 17, wherein the combiner further comprises a semi-transparent coating disposed on the curved surface.

19. The display apparatus according to claim 18, wherein the combiner further includes a light-transmitting plate for supporting and fixing the semi-transparent coating.

20. A video forming apparatus for forming virtual images, Includes a combiner that mixes light corresponding to the external environment with the virtual image and provides it to the observer, The aforementioned combiner is, A diffraction pattern comprising a first surface that reflects light corresponding to the virtual image incident at an angle in the normal direction and a second surface that transmits light corresponding to the external environment incident perpendicularly, A projection optical system disposed between the image forming apparatus and the diffraction pattern, Includes, A display device in which the diffraction pattern and projection optical system change the size of the virtual image by a first magnification in the first direction and by a second magnification smaller than the first magnification in the second direction perpendicular to the first direction.

21. The diffraction pattern and the projection optical system are, In the first direction, a first principal plane is formed at a first position on the optical axis, and a focal plane is formed at a second position on the optical axis. The display device according to claim 20, wherein a second principal plane is formed in a second direction at a third position on the optical axis that is different from the first position, and a focal plane is formed at the second position on the optical axis.

22. The display apparatus according to claim 20, wherein the combiner further includes a light-transmitting plate that supports the diffraction pattern.

23. A video forming apparatus for forming virtual images, Combiner and Includes, The aforementioned combiner is, The aspect ratio of the virtual image is changed by a first magnification in the first direction and by a second magnification in the second direction perpendicular to the first direction. Light corresponding to the external environment is combined with the modified virtual image to form an extended image. It is configured to provide the extended image to the observer, The above second magnification is different from the above first magnification. The combiner is a display device that includes a diffraction pattern for changing the aspect ratio of the virtual image. Display device.

24. The display device according to claim 23, wherein the combiner includes a curved surface that changes the aspect ratio of the virtual image.

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