Display system and movable object
View Patent ↗A display system of one aspect according to the present disclosure includes: a display unit; a first optical member; and a second optical member. The display unit includes a display surface for displaying an image. The first optical member includes a first reflective surface for reflecting rays of light constituting the image. The second optical member includes a second reflective surface for reflecting rays of light reflected from the first reflective surface to form a virtual image in a target space. An angle of view in a length direction of an available area for display of the virtual image with regard to a point of view position for the virtual image is denoted by θ [deg]. A length of the display surface is denoted by W [mm]. W is equal to or greater than a prescribed value given by 12.0×θ−26.6. θ is equal to or greater than 8.0.
1. A display system comprising:
a display unit including a display surface for displaying an image;
a first optical member including a first reflective surface for reflecting rays of light constituting the image; and
a second optical member including a second reflective surface for reflecting rays of light reflected from the first reflective surface to form a virtual image in a target space,
an angle of view in a length direction of an available area for display of the virtual image with regard to a point of view position for the virtual image being denoted by θ [deg],
a length of the display surface being denoted by W [mm],
W being equal to or greater than a prescribed value given by 12.0×θ−26.6, and
θ being equal to or greater than 8.0.
2. The display system according to claim 1 , wherein
W is 1.1 times as large as the prescribed value or less.
3. The display system according to claim 1 , wherein
θ is equal to or larger than 9.0.
4. The display system according to claim 1 , wherein
θ is equal to or smaller than 14.0.
5. The display system according to claim 1 , wherein:
a maximum amount of sag of the first reflective surface is denoted by S 10 [mm];
a maximum amount of sag of the second reflective surface is denoted by S 20 [mm];
a square root of sum of squares of S 10 and S 20 is denoted by S; and
S is equal to or larger than 4.0×θ−9.2 and is equal to or smaller than 6.0×θ−13.8.
6. The display system according to claim 5 , wherein:
the maximum amount of sag of the first reflective surface is a maximum amount of sag in a length direction of the first reflective surface and is given by a distance, along an optical axis of the first reflective surface, between a position on the optical axis of the first reflective surface and a position farthest from the optical axis of the first reflective surface within the first reflective surface; and
the maximum amount of sag of the second reflective surface is a maximum amount of sag in a length direction of the second reflective surface and is given by a distance, along an optical axis of the second reflective surface, between a position on the optical axis of the second reflective surface and a position farthest from the optical axis of the second reflective surface within the second reflective surface.
7. The display system according to claim 1 , wherein
a display distance defined as a distance between the point of view position and the available area for display of the virtual image is equal to or larger than 7 [m].
8. The display system according to claim 7 , wherein
the display distance is equal to or larger than 10 [m].
9. The display system according to claim 1 , wherein
the first reflective surface includes a convex surface.
10. The display system according to claim 1 , wherein
the second reflective surface includes a concave surface.
11. A movable object comprising:
a movable object body; and
the display system according to claim 1 installed in the movable object body.
12. A display system comprising:
a display unit including a display surface for displaying an image;
a first optical member including a first reflective surface for reflecting rays of light constituting the image; and
a second optical member including a second reflective surface for reflecting rays of light reflected from the first reflective surface to form a virtual image in a target space,
an angle of view in a length direction of an available area for display of the virtual image with regard to a point of view position for the virtual image being denoted by θ [deg],
a maximum amount of sag of the first reflective surface being denoted by S 10 [mm],
a maximum amount of sag of the second reflective surface being denoted by S 20 [mm],
a square root of sum of squares of S 10 and S 20 being denoted by S,
S is equal to or larger than 4.0×θ−9.2 and is equal to or smaller than 6.0×θ−13.8, and
θ being equal to or greater than 8.0.
13. The display system according to claim 12 , wherein:
the maximum amount of sag of the first reflective surface is a maximum amount of sag in a length direction of the first reflective surface and is given by a distance, along an optical axis of the first reflective surface, between a position on the optical axis of the first reflective surface and a position farthest from the optical axis of the first reflective surface within the first reflective surface; and
the maximum amount of sag of the second reflective surface is a maximum amount of sag in a length direction of the second reflective surface and is given by a distance, along an optical axis of the second reflective surface, between a position on the optical axis of the second reflective surface and a position farthest from the optical axis of the second reflective surface within the second reflective surface.
14. The display system according to claim 12 , wherein
θ is equal to or larger than 9.0.
15. The display system according to claim 12 , wherein
θ is equal to or smaller than 14.0.
16. The display system according to claim 12 , wherein
a display distance defined as a distance between the point of view position and the available area for display of the virtual image is equal to or larger than 7 [m].
17. The display system according to claim 16 , wherein
the display distance is equal to or larger than 10 [m].
18. The display system according to claim 12 , wherein
the first reflective surface includes a convex surface.
19. The display system according to claim 12 , wherein
the second reflective surface includes a concave surface.
20. A movable object comprising:
a movable object body; and
the display system according to claim 12 installed in the movable object body.