阅读说明：本技术 显示系统、移动体以及设计方法 (Display system, mobile object, and design method ) 是由 笠澄研一 森俊也 于 2019-01-29 设计创作，主要内容包括：本发明的课题在于提供一种能够在维持从虚像的视点位置到叠加虚像的位置的距离的同时实现小型化并且能够减少虚像的失真的显示系统、移动体以及设计方法。显示系统(10)以虚像(310)处于对象空间(400)中的对象位置(P410)的方式进行显示。将从虚像(310)的视点位置(P200)到虚像(310)的显示位置(P310)的距离即显示距离设为L1[m]。将从视点位置(P200)到对象位置(P410)的距离即对象距离的最大值设为L2max[m]。|1/L1-1/L2max|大于0且为0.06以下。(The present invention addresses the problem of providing a display system, a mobile object, and a design method that can reduce distortion of a virtual image while achieving miniaturization while maintaining a distance from a viewpoint position of the virtual image to a position at which the virtual image is superimposed. A display system (10) displays a virtual image (310) so that the virtual image is at a subject position (P410) in a subject space (400). L1[ m ] represents a display distance, which is a distance from the viewpoint position (P200) of the virtual image (310) to the display position (P310) of the virtual image (310). The maximum value of the object distance, which is the distance from the viewpoint position (P200) to the object position (P410), is L2max [ m ]. I1/L1-1/L2 max is greater than 0 and 0.06 or less.)

1. A display system which displays a virtual image by superimposing the virtual image on a subject position in a subject space,

when the display distance, which is the distance from the viewpoint position of the virtual image to the display position of the virtual image, is L1[ m ] and the maximum value of the subject distance, which is the distance from the viewpoint position to the subject position, is L2max [ m ],

I1/L1-1/L2 max is greater than 0 and 0.06 or less.

2. The display system of claim 1,

the value of |1/L1-1/L2max | is 0.03 or less.

3. The display system according to claim 1 or 2,

the value of |1/L1-1/L2max | is 0.02 or less.

4. The display system according to any one of claims 1 to 3,

the value of |1/L1-1/L2max | is 0.015 or less.

5. The display system according to any one of claims 1 to 4,

the value of |1/L1-1/L2max | is 0.01 or less.

6. The display system according to any one of claims 1 to 5,

l2max is 100[ m ].

7. The display system of claim 6,

l1 is 25[ m ] to 50[ m ].

8. The display system according to any one of claims 1 to 7, comprising:

a display unit for displaying an image;

a projection unit that projects the virtual image corresponding to the image onto the target space; and

a control unit for controlling the display unit,

wherein the control unit is configured to change a display method of the image according to a parameter determined by the display position and the target position,

with the object distance set to L2[ m ], the parameters are given by |1/L1-1/L2 |.

9. The display system of claim 8,

the control unit is configured to: the control unit changes the display method of the image based on the stereoscopic sensitivity when the parameter exceeds the threshold.

10. The display system of claim 9,

the control unit is configured to: when the parameter is equal to or less than the threshold, the control unit does not change the display method of the image.

11. The display system according to claim 9 or 10,

the threshold value is a first threshold value and,

the control unit causes the display method based on the stereoscopic sensitivity to be different between a case where the parameter exceeds the first threshold but is equal to or less than a second threshold that is larger than the first threshold, and a case where the parameter exceeds the second threshold.

12. The display system of claim 11,

the control unit is configured to: when the parameter exceeds the first threshold but is equal to or less than the second threshold, the control unit changes the display method based on the stereoscopic sensitivity so that the possibility that a person viewing the target space from the viewpoint position has a sense of incongruity with respect to the virtual image and its vicinity becomes low.

13. The display system according to claim 11 or 12,

the control unit is configured to: when the parameter exceeds the second threshold, the control unit changes the display method based on the stereoscopic sensitivity such that the possibility that the person viewing the target space from the viewpoint position recognizes that the virtual image is at the target position becomes high.

14. A movable body is provided with:

a movable body main body; and

the display system according to any one of claims 1 to 13, which is mounted on the mobile body.

15. A design method of a display system for displaying a virtual image superimposed on a subject position in a subject space, the design method comprising:

a first step of determining a display distance that is a distance from a viewpoint position of the virtual image to a display position of the virtual image; and

a second step of determining a maximum value of the object distance, which is a distance from the viewpoint position to the object position,

wherein when the display distance is L1[ m ] and the maximum value is L2max [ m ],

I1/L1-1/L2 max is greater than 0 and 0.06 or less.

Technical Field

The present disclosure relates generally to a display system, a moving body, and a design method, and more particularly to a display system, a moving body, and a design method of a display system that project a virtual image into a target space.

Background

Patent document 1 discloses a head-up display (head up display) device that projects a virtual image in front of a windshield of a vehicle with respect to eyes of a driver by projecting image light onto the windshield. A head-up display device includes a display element, a movable mirror, a movable unit, a first mirror, and a second mirror. The movable mirror reflects the display light emitted from the display element toward the first mirror. The first mirror reflects the display light reflected by the movable mirror toward the second mirror. The second reflecting mirror reflects the display light reflected by the first reflecting mirror, and condenses and emits the display light toward the front window glass.

In patent document 1, by moving the movable mirror from a first position close to the first mirror to a second position distant from the first mirror, the virtual image can be displayed at a farther distance. That is, when it is desired to extend the distance from the viewpoint position of the virtual image to the position where the virtual image is superimposed, an optical system including a mirror or the like for projecting the virtual image is increased in size.

Disclosure of Invention

An object of the present disclosure is to provide a display system, a moving object, and a design method that can reduce distortion of a virtual image while achieving miniaturization while maintaining a distance from a viewpoint position of the virtual image to a position where the virtual image is superimposed.

A display system according to one aspect of the present disclosure is a display system that displays a virtual image by superimposing the virtual image on a subject position in a subject space. A display distance, which is a distance from the viewpoint position of the virtual image to the display position of the virtual image, is set to L1[ m ]. The distance from the viewpoint position to the object position, i.e., the maximum value of the object distance, is set to L2max [ m ]. I1/L1-1/L2 max is greater than 0 and 0.06 or less.

A moving body according to one aspect of the present disclosure includes a moving body main body and the display system according to the above aspect mounted on the moving body main body.

A design method according to one embodiment of the present disclosure is a design method for a display system that displays a virtual image by superimposing the virtual image on a subject position in a subject space, and includes a first step and a second step. The first step is a step of determining a display distance, which is a distance from a viewpoint position of the virtual image to a display position of the virtual image. The second step is a step of determining a maximum value of the object distance, which is a distance from the viewpoint position to the object position. The display distance is set to L1[ m ]. The maximum value is set to L2max [ m ]. I1/L1-1/L2 max is greater than 0 and 0.06 or less.

Drawings

FIG. 1 is a conceptual diagram of a display system of one embodiment.

Fig. 2 is a conceptual diagram of a mobile object (automobile) provided with the display system.

Fig. 3 is a conceptual diagram showing a field of view of a user in the case of using the above-described display system.

Fig. 4 is an explanatory diagram of the above display system.

Fig. 5 is a graph showing the evaluation result of the display of the virtual image.

Detailed Description