JPH01259348A - Three-dimensional image display device - Google Patents

Abstract

PURPOSE:To continuously observe a three-dimensional image without using stereoscopic spectacles by providing a screen having directivity, a projection machine for both eyes, a rotatable reflecting mirror, and a driving control part for rotating the reflecting mirror by following up detected both eyes positions. CONSTITUTION:Right eye and left eye images by projection machines 7R, 7L are reflected by a reflecting mirror and projected onto a screen 6, an image is projected in accordance with both eyes of an observer 8 by directivity of the screen and a three-dimensional image can be viewed. When both eyes of the observer 8 move, a moving position is detected by a both eye position detecting part 9, and based on this detection data, a driving control part 20 calculates a moving amount of both eyes. Also, from this moving amount, an optimum rotation angle against vertical and horizontal axes of the reflecting mirror is calculated, the reflecting mirror is rotated by the control part 20 and a continuous image is secured. In such a way, the three-dimensional image can be observed continuously by a miniaturized device.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a three-dimensional image display device for reproducing three-dimensional images of landscapes, people, etc. with a three-dimensional effect without glasses. .

(Prior art) There have been various display devices for displaying three-dimensional images, but a variable focus mirror has been adopted as a typical display device that gives the viewer a three-dimensional effect without the need for well-known stereoscopic glasses. There are also screens that use directional lenses, typically convex lenses.

FIG. 2 is a conceptual diagram of a three-dimensional image display device that employs a variable focus mirror. In Fig. 2, 1 is a vibrating mirror, 2 is a speaker, 3 is a CRT display, 4 is a virtual image, and 5 is an observer. The vibrating mirror 1 deforms into a concave surface, a flat surface, and a convex surface based on the vibrations caused by the speaker 2, and its focal point. The distance changes, and in response to this deformation, the image on the CRT display 3 becomes a virtual image 4 indicated by a broken line in the figure, which is observed by the observer 5.

Furthermore, FIG. 3 is a conceptual diagram of a three-dimensional image display device that employs a Fresnel lens as a screen.

In FIG. 3, 6 is a screen, 7R and 7L are projectors, and 8 is an observer, and the right-eye image and left-eye image projected onto the screen 6 by the projectors 7R and 7L have optical directivity. Under the action of the screen 6 which is H, the light enters the right eye 8R and the left eye 8L of the observer 8, thereby enabling the observer 8 to stereoscopically view the image as a three-dimensional image.

However, with this device, although it is possible to obtain an opaque reproduced image,
Since the range in which stereoscopic viewing is possible is fixed, there is a problem in that stereoscopic viewing becomes impossible even if the observer 8 moves his or her face slightly to the left or right.

Therefore, in order to solve the above-mentioned problem, the applicant uses a television camera 9 to monitor both eyes 8R and 8L of the observer 8, as shown in FIG.
(horizontal movement, rotational movement, movement of only the viewpoint (including cases where only the viewpoint moves) and cases where these 8 are combined) are detected, and based on this detection data, projectors 7R and 7L are moved to binoculars 8R and 8L.
(Japanese Patent Application No. 62-228547). According to this device, if the observer 8 moves, for example, in the direction indicated by arrow a in FIG. 3 (to the left), the projector 7R.

7L in the direction indicated by the arrow in the figure (to the right as seen from the observer)
By moving it by a drive system (not shown), a continuous stereoscopic viewing range was ensured.

(Problem to be Solved by the Invention) However, although the former device has a simple structure, the virtual image 4 is a semi-transparent image, and therefore there is a problem that the field of application is limited.

In the latter device, both eyes 8R of the observer 8 are used.

A large drive system is required to move the projectors 7R and 7L so as to follow the movement of the projector 8L, which leads to the problem of an increase in the size of the apparatus.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, an object of the present invention is to provide a three-dimensional image display device that can be applied in a wide range of fields and can be miniaturized.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a screen having optical directivity, a projector for projecting a right-eye image and a left-eye image, and a space between the projector and the screen. a rotatable reflector disposed in the optical path of the projector to reflect both images from the projector and project them onto the screen; and a binocular position detection unit to detect the moving positions of both eyes of the viewer of the images. Then, the amount of movement of both eyes is calculated based on the detection data of the binocular position detection unit, and the reflecting mirror is rotated so that the projection position of both images follows the movement position of both eyes of the observer. and a drive control section.

(Function) According to the present invention, images for the right eye and for the left eye from, for example, two projectors are reflected by a reflecting mirror and projected onto a screen, and are directed toward this screen due to the directivity of the screen. The images are projected corresponding to the positions of the observer's both eyes, that is, the right eye and the left eye, so that the observer can enjoy a realistic three-dimensional image.

Here, when the observer's both eyes move, the binocular position detection section detects the movement positions of both eyes, and based on this detection data, the drive control section calculates the amount of movement of both eyes, and then the drive control section The reflector is rotated so that both images follow the movement of the observer's eyes, thereby ensuring a continuous stereoscopic viewing range.

(Embodiment) FIG. 1 is a conceptual diagram showing an embodiment of a three-dimensional image display device according to the present invention, and the same components as those in FIG. 3 showing a conventional example are denoted by the same reference numerals.

That is, 6 is a screen made of a lens having optical directivity, for example a Fresnel lens, 7R is a projector that projects an image for the right eye, 7L is a projector that projects an image for the left eye, and 8 is a screen that projects an image onto the screen 6. An observer who observes, 8R is the right eye of the observer 8, 8L is the left eye of the observer 8, 9 is a binocular position detection unit that detects the moving position of both eyes 8R and 8L of the observer 8,
For example, a television camera. In addition, the projectors 7R and 7L
is arranged at a position where its projection direction is approximately parallel to the projection surface of the screen 6.

10 is a rotatable reflector that reflects the images from the projectors 7R and 7L and projects them onto the screen 6; 20 is a drive control unit that adjusts the position of both eyes of the observer 8 based on the detection data of the binocular position detection unit 9; Calculate the amount of movement and the rotation angle of the reflecting mirror 10,
The projection positions of both images by the projectors 7R and 7L are set to the observer's 8 eyes 8R.

The reflecting mirror 10 is rotated so as to follow the movement of 8L.

7-R and 7-L indicate images reflected by the reflecting mirrors 10 of the projectors 7R and 7L, and 7-R and 7°L indicate apparent images of the projectors 7R and 7L. Further, in order to indicate the moving direction of the observer 8, an X is shown in the figure.

Define the y coordinate system. That is, the direction in which the observer 8 moves left and right is the X (horizontal) direction, and the direction in which the observer 8 moves up and down is the y (vertical) direction.

Next, the configuration and operation of the drive control section 20 will be explained in more detail based on FIGS. 4 to 6.

FIG. 4 is a block diagram showing the configuration of the drive control section 20, and FIG. 5 is a flowchart of its operation.

In FIG. 4, reference numeral 21 denotes a control unit that inputs the detection data from the binocular position detection unit 9 and controls the observer 8 by, for example, detecting a light spot on black and calculating the line of sight direction. The amount of movement of both eyes 8R and 8L in the X direction and the Calculate the rotation angle θ and the horizontal (x) axis rotation angle φ.

Reference numeral 22 denotes a vertical axis rotation motor (hereinafter referred to as PM) drive unit, which rotates the reflection vL10 by an angle θ about the rotation axis of the PM 23 based on instructions from the control unit 21. 23
is a horizontal shaft rotation motor (hereinafter referred to as HM) drive unit, which drives the HM25 based on instructions from the control unit 21,
The reflecting mirror 10 is rotated by an angle φ about the rotation axis 25.

FIG. 6 is a diagram schematically showing the drive mechanism of the reflecting mirror 10. According to FIG. 6, the rotating shaft 25a of the HM25 is attached to the reflector m10 at the rotation 1], and the tip sides of the HM25 and the rotating shaft 10a are attached to the frame 10a surrounding the reflecting mirror 10 (however, the rotating shaft 25a is rotatably attached to the frame 10a, and a rotating shaft 23a of the PM 23 is rotatably attached to the frame 10a.

Therefore, when rotating the vertical axis by an angle θ about IIJ, the reflecting mirror 10 rotates together with the frame 10g, and when rotating by an angle φ about the horizontal axis, only the reflecting mirror VT10 rotates. Furthermore, the P Fvl 23 and HM 25 are constructed of well-known DC motors, stepping motors, and the like.

Next, the operation of the above configuration will be explained. Projector 7R, 7
The right-eye image and the left-eye image by L are reflected by the reflecting mirror 10 and projected onto the screen 6, and the optical directivity of the Fresnel lens constituting the screen 6 allows the observer 8 to direct his/her line of sight toward the screen 6. right eye 8R, left eye 8
Each of the images is projected corresponding to L, and the observer 8 can see a three-dimensional image that gives a real sense of warmth.

Here, when both eyes 8R and 8L of the observer 8 move in the X direction and the X direction shown by the arrow C in FIG. is input to the control section 21. The control unit 21 calculates the amount of movement in the x and
The PM drive unit 22 calculates the optimal rotation angles θ and φ around the vertical (y) axis and horizontal (x) axis of the
The PM 23 and the HM 25 are rotated by the drive of the HM drive unit 24. As a result, the reflector 10 is directed to the projector 7R in the optimum direction.
, 7L (the position indicated by the thick broken line in FIG.
Even if R and 8L are moved, three-dimensional images can be observed continuously.

As described above, according to this embodiment, the reflector 10 is disposed in the middle of the optical path between the screen 6 and the projectors 7R, 7L, and the drive controller 20 rotates the reflector 10, so that the observer 8 can Since each image by the projectors 7R, 7L can be projected at the optimal position by following the movement of the binocular eyes 8R, 8L, the projected image can be made to follow the movement of the binocular eyes 8R, 8L of the observer 8. The drive system of the device can be significantly downsized, and the entire device can be downsized.

Note that the configuration of the drive control section 21 is not limited to this embodiment, and may be any structure as long as it has a mechanism that can rotate the reflecting mirror. Further, although the binocular position detection unit 9 is disposed in front of the observer 8, the present invention is not limited to this.
In these cases, the movement position of both eyes may be determined by estimating the position of both eyes from the statistical positional relationship of the head of the observer 8, etc. Detection may be performed.

In addition to convex lenses, screens with optical directivity include lenticular lenses, which are made up of many cylindrical lenses, so-called rope-eye lenses, which have many tiny convex lenses, and cat-eye lenses. It is clear that a reflective lens such as a concave mirror exhibiting optical properties similar to a convex lens may also be used.

(Effects of the Invention) As described above, according to the present invention, there is provided a screen having optical directivity, a projector for projecting a right-eye image and a left-eye image, and an optical path between the projector and the screen. a rotatable reflecting mirror that is disposed in the projector and reflects both images from the projector and projects them onto the screen; and a binocular position detection unit that detects the moving positions of both eyes of the viewer of the images.
Drive control that calculates the amount of movement of both eyes based on the detection data of the binocular position detection unit and rotates the reflector so that the projection position of both images follows the movement position of the observer's eyes. The drive system for making the projected image follow the movement of the observer's eyes can be significantly downsized, which in turn allows the entire device to be downsized and can be used in a wide range of fields. This has the advantage that it is possible to realize a video system that allows you to continuously enjoy immersive three-dimensional images without feeling uncomfortable without using stereoscopic glasses.

[Brief explanation of the drawing]

Fig. 1 is a conceptual diagram showing an embodiment of the present invention, Fig. 2 is a conceptual diagram of a conventional device that uses a variable focus mirror, Fig. 3 is a conceptual diagram of a conventional device that uses a directional screen, and Fig. 4 of the drive control unit according to the present invention! ＋”Block diagram showing ¥ composition,
Figure 5 shows drive I! Flowchart of operation of I control section, No. 6
The figure is a schematic diagram of the driving mechanism of the reflecting mirror. In the figure, 6...screen, 7R, 7L...projector,
8... Observer, 8R... Right eye, 8L... Left eye, 9
Binocular position detection unit, 10...Reflector, 20... Drive control unit. Patent applicant: Agent for Nippon Telegraph and Telephone Corporation
Patent Attorney Yoshi 1) Yoshitaka 23a Figure 6 of the 1-smell diagram of the gravity machine J Natsume of 1 sen.

Claims (1)

[Scope of Claims] A screen having optical directivity; a projector for projecting a right-eye image and a left-eye image; and a projector disposed in the optical path between the projector and the screen, and configured to project both images by the projector. a rotatable reflector that reflects the image and projects it onto the screen; a binocular position detector that detects the moving positions of both eyes of the viewer of the images; a drive control unit that calculates the amount of movement of both eyes and rotates the reflecting mirror so that the projection position of both images follows the movement position of both eyes of the observer. Image display device.