JPH0713105A - Observer follow-up type stereoscopic display device - Google Patents

Abstract

PURPOSE:To provide an observer follow-up type stereoscopic display device capable of removing restrictions on the position of an observer who views a stereoscopic image and increasing the degree of freedom in the observing posture of the observer. CONSTITUTION:A screen 8 for stereoscopic display is constituted of two lenticular lenses 81 and 82 and a transmissive diffusing layer 83, and a video is projected to the screen 8 from a stereoscopic projector 9 consisting of a projector 9R for projecting a right image and a projector 9L for projecting a left image, then the visual point and both eyes positions of the observer 10 are detected by a stereoscopic measuring device 11, and the movement of the observer 10 and the movement of the projector 9 are interlocked with each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an observer following type stereoscopic display device, and more particularly to a field requiring stereoscopic images such as stereoscopic television, stereoscopic video, stereoscopic videophone for intercommunication between remote places, conference and the like. As described above, the present invention relates to an observer-following stereoscopic display device which is used in a conference or the like in which image display according to an observation position is required.

[0002]

2. Description of the Related Art Conventionally, as a means for displaying a three-dimensional image, there is a method using a lenticular lens sheet (Takashi Ogoshi: Three-dimensional image optics, industrial books). This system does not require special glasses (polarizing glasses, liquid crystal shutter glasses) or the like, so that a stereoscopic image can be viewed without discomfort.

FIG. 9 is a diagram showing an example of such a stereoscopic image display device. In FIG. 9, images in four different directions are captured by the four cameras 41, 42, 43, 44, and the images are captured by the four projectors 21, 22, 23 ,.
It is input to 24 and is projected toward the stereoscopic display screen 7. The stereoscopic display screen 7 has two lenticular lenses 1 and 1 stuck together, and a transmissive diffusion layer 5 between them.
It has a structure with. The focal plane of the lenticular lens 1 is set substantially at the position of the transmissive diffusion layer 5. The observer 3 is located on the opposite side of the projector 2 with the stereoscopic display screen 7 interposed therebetween.

FIG. 10 is a diagram for explaining the principle that an image looks three-dimensional in the stereoscopic image display device shown in FIG. In FIG. 10, images in four different directions are displayed on the stereoscopic display screen 7 by the projectors 21, 22, 23 and 24.
Is projected toward. A feature of the stereoscopic display screen 7 is that an image projected at the same distance as the projection distance is reproduced on the stereoscopic display screen 7. When the projectors 21, 22, 23, and 24 are arranged in a space between both eyes,
The reproduced images 61, 62, 63, 64 are also reproduced at the distance between both eyes at the observation distance. In the example shown in FIG. 10, the observer 3 is looking at the images projected by the projectors 22 and 23. Since the projected redevelopments 62 and 63 have image parallax, the observer 3 can see a stereoscopic image.

[0005]

In the conventional stereoscopic image display device shown in FIG. 9 and FIG. 10, the stereoscopic viewing area that the observer 3 can see is about 6.5 cm (between human eyes) × ( The number of directions is -1). In the example shown in FIG.
The stereoscopic area is 13.5 cm, which is not sufficient. When viewed by a large number of people, a stereoscopic image can be seen even in a 13.5 cm cycle, but an observer looking at the center and an observer looking at the periphery see almost the same stereoscopic image. When a conference with a sense of realism is assumed, this method never allows viewing an image in an oblique direction. Therefore, in order to see a stereoscopic image corresponding to the direction of the observer's viewpoint, it can be realized by using the same number of projectors 2 as the number of input cameras 4, but the scale of the device in the input system and the display system becomes large. The cost will also increase.
Furthermore, although this method can widen the stereoscopic viewing area in the left-right direction, there is a problem in that the stereoscopic viewing distance in the depth direction cannot be expanded. Moreover, when the observer tilts his / her head, the left and right eyes of the observer may not correspond to the left and right images presented vertically, and the stereoscopic image may not be observed.

Therefore, a main object of the present invention is to provide an observer-following stereoscopic display device capable of eliminating the restriction on the position of the observer who sees a stereoscopic image and increasing the degree of freedom of the observer's observation posture. Is to provide.

[0007]

The present invention relates to a transmission type stereoscopic display screen having two optical lenses and a transmission type diffusion surface provided between the two optical lenses, and a stereoscopic display screen. An observer-following stereoscopic display in which a stereoscopic image composed of a right-eye image and a left-eye image is projected from one side on a stereoscopic display screen by a projection means and the stereoscopic image is observed from the other side of the stereoscopic display screen. In the device, detecting means for detecting the position of the observer who observes the stereoscopic image from the other side of the stereoscopic display screen and the positions of both eyes of the observer, and corresponding to the movement of the observer according to the detection output. And a control means for moving the projection means.

[0008]

The viewer-following stereoscopic display device according to the present invention is
A stereoscopic image of the observer is obtained by detecting the position of the observer and the positions of both eyes of the observer, making the projection unit correspond to the observer one-to-one, and moving the projection unit according to the observation position of the observer. There is no restriction on the position for observing, and the stereoscopic image can be observed even if the observer tilts or rotates his head.

[0009]

FIG. 1 is a diagram showing an embodiment of the present invention.
In FIG. 1, the stereoscopic display screen 8 is composed of two lenticular lenses 81 and 82 and a transmissive diffusion layer 83 provided between them. The focal planes of the lenticular lenses 81 and 82 are generally transmissive diffusion layers 83.
It is said that The stereoscopic projector 9 is composed of a right image projecting projector 9R and a left image projecting projector 9L, and projects toward the stereoscopic display screen 8. The stereoscopic projector 9 is interlocked with the movement of the observer 10. When the observer 10 moves to the right in FIG. 1, the stereoscopic projector 9 moves to the right, and when the observer 10 moves to the left, the stereoscopic projector 9 moves to the stereoscopic direction. The projector 9 also moves to the left, and when the observer 10 approaches the stereoscopic display screen 8, the stereoscopic projector 9 approaches the stereoscopic display screen 8, and when the observer 10 leaves the stereoscopic display screen 8, the stereoscopic projector 9 also moves. It moves away from the stereoscopic display screen 8.

The arrow shown in FIG. 1 shows the case where the observer 10 moves to the right, and the stereoscopic projector 9 also moves in the same direction. The stereoscopic projector 9 is provided on a dolly 91, and by moving the dolly 91 in the front-rear and left-right directions, the stereoscopic projector 9 is moved to 360.
° Can move freely. In addition, the three-dimensional projector 9
In order to move freely by 60 °, other means may be provided instead of the carriage 91.

The image projected by the stereoscopic projector 9 corresponds to the position of the viewpoint of the observer 10. In FIG. 1, one observer is described, but the number of observers is not limited, and a stereoscopic projector corresponding to the number of observers may be used. The viewpoint and binocular position of the observer 10 are measured by the stereo measurement device 11. The stereo measurement device 11 includes two infrared cameras 17
1, 172, and the infrared camera 171,
Infrared rays are radiated from 172 toward the observer 10, and the pupil due to the reflection of the retina of the observer 10 is projected by the two infrared cameras 17
1, 172, and the positions of both eyes and the position of the viewpoint are obtained based on the image information.

FIG. 2 is a schematic block diagram of an embodiment of the present invention. In FIG. 2, the infrared camera 1 shown in FIG.
The outputs of 71 and 172 are given to the control unit 31. Although not shown in FIG. 1, the observer 10 is provided with a position detector 173 for detecting the movement of its head. The position detecting unit 173 is, for example, a three-dimensional magnetic sensor (IEEE Trans. Aerosp & Electron. Syst., Vol. AES-1.
5, No. 5 1979) is used. For this, a magnetic sensor is attached to the observer 10, and the viewpoint and binocular position are obtained from the information on the distance and direction from the magnetic source. Note that the position of the observer 10 is not limited to this, and a method by image processing using facial feature points (TV technique, Vol. 14, No. 36, 1) is used.
9 to 24, 1990) and two distance detection PSDs using infrared rays may be used to measure the position of the observer 10.

The control unit 31 includes infrared cameras 171 and 172.
Of each of the outputs of the position detector 173 and the position detector 173,
The dolly 91 is controlled so that the observer 10 and the stereoscopic projector 9 operate in a one-to-one manner.

FIG. 3 is a diagram for explaining the operation of the stereoscopic projector when the observer tilts his head. Figure 3
(A) shows the case where the observer 10 is positioned with his / her head straight, and the projectors 9R and 9L are arranged at intervals substantially the same as the distance between the eyes of the observer 10 at that time. However, the lenticular lenses 81 and 82 in this case have substantially the same focal length and the same pitch. Under this condition, the distance of the observer 10 from the stereoscopic screen 8 and the distance of the stereoscopic projector 9 are substantially equal.

Next, FIG. 3B shows the case where the observer 10 tilts his head. The positions of both eyes in this state are photographed and measured by the stereo measurement device 11. The projectors 9R and 9L are moved based on this position information. The stereoscopic projector 9 can independently move the right image projection projector 9R and the left image projection projector 9L. The right image projection projector 9R and the left image projection projector 9L make the same movement as the position of the observer's 10 eye.

The arrangement of the observer 10 and the stereoscopic projector 9 shown in FIG. 3 is the same as that in FIG. Therefore, the observer 1
When the right eye of 0 goes down, the right image projection projector 9R moves down. Further, in FIG. 3B, when viewed from the front, the distance between both eyes is narrowed in the horizontal direction of the observer 10, so that the distance between the right image projection projector 9R and the left image projection projector 9L of the stereoscopic projector 9 is reduced. Is the same as the horizontal distance between the eyes of the observer 10. In the above description, the lenticular lenses 81 and 82
However, if the focal length and the pitch are different, the distance between the eyes of the observer 10 and the distance between the right image projection projector 9R and the left image projection projector 9L are different, and the Naturally, the distance of the observer 10 from the screen 8 and the distance of the stereoscopic projector 9 are also different. The moving mechanism of the right image projection projector 9R and the left image projection projector 9L of the stereoscopic projector 9 is not limited.

FIG. 4 is a diagram showing the movement of the stereoscopic projector 9 when the observer 10 rotates his / her head. In FIG. 4, when the observer 10 turns his / her head counterclockwise in FIG. 4, the projector unit of the stereoscopic projector 9 rotates clockwise.

FIG. 5 shows that when the projectors are arranged as shown in FIG.
FIG. 6 is a diagram showing a configuration in the case where the binocular width cannot be set. 5A is a front view of the stereoscopic projector 15, and FIG. 5B is the projector 1 shown in FIG.
It is the figure which looked at 5 from the upper part. In FIG. 5A, a mirror 12 is arranged between the right image projection projector 9R and the left image projection projector 9L, and the right image projection projector 9R and the left image projection projector 9L are directed inward, respectively. An image is projected on the stereoscopic screen 8 via the mirror 12. In this case, the right image projection projector 9R and the left image projection projector 9L can be moved up and down, respectively, in accordance with the vertical position of both eyes of the observer. Also, FIG.
As shown in (b), the right image projection projector 9R and the left image projection projector 9L move according to the width of both eyes of the observer.

FIG. 5C shows a stereoscopic projector 16 using a horizontal movement rail 14 and a vertical movement rail 13.
Is moved, and the projector 16 is controlled to move based on the position information of the observer.

FIG. 6 is a diagram showing an example in which a fly-eye lens is used as a stereoscopic display screen. The fly-eye lens 18 is an assembly of convex lenses 19, and when used for three-dimensional use, two fly-eye lenses 18 are used by being attached.

FIG. 7 is a diagram for explaining the relationship between the observer and the stereoscopic projector when the fly-eye lens shown in FIG. 6 is used. In FIG. 7, even when the face of the observer 10 lies sideways, the observer 10 can observe a stereoscopic image by setting the stereoscopic projector 19 in the horizontal direction similarly.

FIG. 8 is a diagram for explaining a stereoscopic screen in which two lenticular lenses are stacked. In the example shown in FIG. 8, instead of the fly's eye lens 18 shown in FIG. 6, two lenticular lenses 20, 20 are vertically stacked to form a stereoscopic screen 21.

[0023]

As described above, according to the present invention, the position of the observer and the positions of both eyes of the observer are detected, and the projection means is made to correspond to the observer in a one-to-one correspondence. By moving the projection means based on, the moving means for the right eye and the left eye of the projection means based on the position information of both eyes of the observer, the position to observe the stereoscopic image of the observer The restriction can be eliminated, and the stereoscopic image can be observed even if the observer tilts or rotates the head.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an embodiment of the present invention.

FIG. 2 is a schematic block diagram of an embodiment of the present invention.

FIG. 3 is a diagram for explaining an operation of the stereoscopic projector when an observer tilts his / her head.

FIG. 4 is a diagram for explaining the movement of the stereoscopic projector when an observer rotates his / her head.

FIG. 5 is a diagram for explaining a configuration in the case where the distance between the projectors when the stereoscopic projectors are arranged as shown in FIG. 3 cannot be set to the binocular width of the observer.

FIG. 6 is a diagram showing an example in which a stereoscopic display screen is configured using a fly-eye lens.

FIG. 7 is a diagram showing a state where a stereoscopic image can be observed with the stereoscopic projector facing sideways when the face of the observer lies sideways.

FIG. 8 is a diagram showing another example of a stereoscopic screen.

FIG. 9 is a diagram showing an example of a conventional stereoscopic image display device.

FIG. 10 is a diagram for explaining a stereoscopic screen in which two lenticular lenses are stacked.

[Explanation of symbols]

 8 Three-dimensional display screen 9, 15, 16, 19 Three-dimensional projector 11 Stereo measurement device 12 Mirror 13 Vertical movement rail 14 Horizontal movement rail 17 Infrared camera 18 Fly's eye lens 20, 81, 82 Lenticular lens

Claims (1)

[Claims] 1. A transmissive stereoscopic display screen having two optical lenses and a transmissive diffusion surface provided between the two optical lenses, and a projection means from one side of the stereoscopic display screen. In the observer-following stereoscopic display device, which projects a stereoscopic image including a right-eye image and a left-eye image onto the stereoscopic display screen, and observes the stereoscopic image from the other side of the stereoscopic display screen, Detection means for detecting the position of the observer observing the stereoscopic image from the other side of the stereoscopic display screen and the positions of both eyes of the observer, depending on the detection output of the detection means, to the movement of the observer An observer-following stereoscopic display device, comprising: a control unit that moves the projection unit correspondingly.