JP2800125B2 - Image display device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display device used for a simulator of a means of transportation using a rearview mirror, such as an automobile and a helicopter.

[Technical problem] In the case of configuring an image display device, for example, when displaying a scenery reflected on a rearview mirror in a part of the scenery displayed in front, for example, a CRT display, a collimation lens system, and a plane mirror are used. It is conceivable that an image display device dedicated to the rearview mirror is provided separately from the optical system of the image display device that displays the scenery in front of the rearview mirror, and images are synthesized.

[Problems to be Solved by the Invention] However, the number of image display devices is increased, the price is increased, and there are restrictions on the arrangement.

The present invention has been made to solve the above-described problem, and has as its object to display an image of a rearview mirror in a displayed image by using one collimating optical system.

[Means for Solving the Problems] An image display device according to the present invention includes a first image generation device, a second image generation device, a convex mirror that reflects light emitted from the second image generation device, An off-axis collimating optical system for collimating light emitted from the first image generator and light from the second image generator reflected by the convex mirror.

[Operation] The image of the second image generation device is reflected by the convex mirror, and at that time, the image is distorted similarly to the rearview mirror. The off-axis collimating optical system displays the distorted and collimated video by a convex mirror composed of the image of the second image generator on a part of the collimated video composed of the image of the first image generator, It is an image of the rearview mirror. Accordingly, an image in which a distorted wide-angle image of the rearview mirror is displayed can be displayed at an arbitrary position, and the collimating optical system is shared, thereby facilitating the arrangement of the display device.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention, where 1 is the first embodiment.
Projector unit as an image generating device,
Projector 2 and rear screen 3 located in front of it
And The projector 2 projects, for example, a scene looking forward from inside a car on a rear screen 3. Reference numeral 4 denotes a CRT display as a second image generating device, which displays, for example, a scene behind a car. Reference numeral 5 denotes a convex mirror disposed in front of the CRT display 4 and behind the rear screen 3. The convex mirror 5 reflects and distorts the image of the CRT display 4 as reflected on a rear-view mirror, and displays the image of the projector 2 reflected on the rear screen 3. It blocks a part. 6
Is a collimating mirror constituted by a concave mirror, and reflects and forms an image of the projector 2 from the rear screen 3 and an image of the CRT display 4 reflected by the convex mirror 5. The projector unit 1 and the convex mirror 5 are displaced from the optical axis of the collimating mirror 6 in front of the collimating mirror 6 (OFF AXIS).
(Or OFF SET)). Accordingly, the observer views the image at a position where the viewpoint e is deviated from the optical axis of the collimating mirror 6.

First, the image displayed on the rear screen 3 of the projector unit 1 is collimated by the collimating mirror 6 while being partially blocked by the convex mirror 5, as if from the viewpoint e. Seems to be at a distance. Here, X11 is the distance from the viewpoint e to the virtual image IP of the rear screen, S1 is the distance from the viewpoint e to the collimating mirror 6, P11 is the distance from the rear screen 3 to the collimating mirror 6, and f is the collimating mirror. The focal length, r, is the radius of the collimating mirror 6.

Further, the image displayed on the CRT display 4 is distorted and reflected by the convex mirror 5, as if it were reflected on a rear-view mirror, and the angle of view is reduced. Then, by being collimated by the collimating mirror 6, from the viewpoint e It looks as if it were fitted into a part of the image of the projector unit 1 at the distance of. Here, X12 is the distance from the viewpoint e to the virtual image ID of the CRT display, S2 is the distance from the viewpoint e to the collimating mirror 6, and q11 is the CRT by the convex mirror 5.
The distance between the convex mirror 5 and the collimating mirror 6 of the image on the display 4 surface, q12 is the distance from the convex mirror 5 to the collimating mirror 6, and f is the focal length of the collimating mirror 6.

Therefore, by setting X11 and X12 arbitrarily, it is possible to display the rearview mirror.

[Effects of the Invention] As described above, according to the present invention, the arrangement of the display device is facilitated, the degree of freedom of design is increased, and the cost is reduced and the design is reduced by sharing the collimating optical system. This has the effect of shortening the time required.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of one embodiment of the present invention. 1. Projector unit (first image generation device), 2.
... projector, 3 ... rear screen, 4 ... CRT display (second image generation device), 5 ... convex mirror, 6 ... collimating mirror.

Claims (1)

(57) [Claims] A first image generating device, a second image generating device, a convex mirror that reflects light emitted from the second image generating device, and a convex mirror that reflects light emitted from the first image generating device. An image display device comprising: an off-axis collimating optical system that collimates reflected light from the second image generating device.