JPS581123A - Stereoscopic image display method - Google Patents

Abstract

PURPOSE:To observe a natural stereoscopic image in a wide observation range while utilizing the parallax between both eyes by projecting an image for the left eye and that for the right eye alternately on one projection screen, and the observing the left and right images separately through spectacles which vary in light transmissivity on the left and right sides alternately synchronizing with said projection switching. CONSTITUTION:While an image for the left eye is projected on a screen 7 by a projector 2, a switch 4 is placed on the left-eye side for closure and then the left-eye light shielding plate 61 of spectacles 6, e.g. a liquid-crystal plate increases in light transmissivity to observe the image with the left eye 81. During this period, the right-eye light shielding plate 62 has light transmissivity and the image is not seen with the right eye 82. When a film 1 is advanced by one frame and an image for the right eye is projected, the left and right are inverted. This operation is repeated >=10 times per second to observe a stereoscopic image. Even when the projection screen is observed at a different position, the image is separated and seen, so that stereoscopic visible range is wide and a natural stereoscopic image is obtained only by being seen through the spectacles.

Description

[Detailed description of the invention]

In the method of
This relates to a 3D image display method that allows M-viewing.The first known 3D image display method is to use two colors of light that have a complementary and extra color relationship to the left eye. The viewer's power (colors that have the same complementary color and extra color relationship as the projection side - the method of separating the left and right images by passing them through the filter, and the second method is the difference in the plane of polarization. The third method is to use two lights to project the entire image for the left eye and the right eye, and to separate the b" stone image through a polarizing filter. Thirdly, to utilize binocular parallax by projection using a lenticular screen. Fourthly, a pair of light beams from a phosphor whose spectra do not overlap each other and whose chromaticity is white is used to display three-dimensional images on a screen, one for the left eye and one for the right eye. There is a method of projecting an image for the eye and separating the left and right images through a filter that allows light with one spectral characteristic to pass through but not the other. The second method is difficult to see because the colors seen by the left and right eyes are different, the second method separates the left and right images into light components, and the third method has a narrow viewing range for stereoscopic viewing. The method has drawbacks such as requiring extremely special diaphragms and filters.The present invention does not have any of the above drawbacks and enables viewing of natural stereoscopic images over a wide viewing range. Images for the left eye and images for the right eye are alternately switched and displayed on the projection surface, and the light transmittance changes alternately in synchronization with the switching and in response to the switching. When the images for the left eye and the right eye are viewed separately, a three-dimensional image is obtained by applying a pair of eyes W! 1st
In the figure, 1 indicates left eye image 1. , 1', 17 etc. and the image for the right eye 1□ G% 17 etc. are recorded by chronologically arranging them alternately every other frame. For example, a strip-shaped recording medium, such as a strip-shaped film, 2 is a projector, 3 is a projector 2 Nyatsuta, 4
A switch that operates in synchronization with the sunyasota 3 to generate an electrical signal, 5 a cable that transmits the electrical signal, 6 glasses provided with a light-shielding plate, 68.6. (c) Light-shielding plates for the left eye and right eye whose light transmittance changes according to electrical signals; for example, a liquid crystal plate; 7 indicates a screen; FIG. 2 is an explanatory diagram of the operation of the light shielding plates 61Th and 6H in one embodiment of the present invention, and is
．． -1. During this period, the image A on the screen 7 is the left eye image 11, and the left eye light shielding plate 6. Electrical signal location; impression 1, left eye shielding plate 6. The light transmittance... has increased to a transparent V, and the light shielding plate for the right eye6. The second electrical signal is Inkarohama n, the right eye light shielding plate 6. indicates that the light transmittance is low. Also, during the time tit-t, the screen/7]Yσ] image A is the image 1t for the right eye, and the light shielding plate 6 for the left eye. No electrical signal is applied to the right eye light shielding plate 62, and its light transmittance is low.

1 and 2 show the operation of an embodiment of the present invention in which the light transmittance is 0 or more indicating that the light transmittance increases and becomes transparent.
To explain with a diagram, first, while the left eye image 11 is being projected onto the screen 7 by the projector 2, the switch 4
is closed to the left eye side and connected to the left eye light shielding plate 6 of the glasses 6 via the cable 5. When an electrical signal is applied to n1, the light transmittance of the left-eye light shielding plate 61 increases and becomes transparent, so that the left eye 81 can view the left-eye image 11 projected on the screen 7. . During this time, the right eye light shielding plate 6°Kri electrical signal 2 is not applied to the right eye light shielding plate 6. The light transmittance of the right eye is low.
．． is the left eye image 1. In the 0th order, which cannot be observed, the film 1
While the image 1 for the right eye is being projected by one frame, the switch 4 is closed to the right eye side and the light shielding plate 6 for the right eye of the glasses 6 is closed.
An electrical signal is applied to the right eye light shielding plate 6. The light transmittance of the eye increases and becomes transparent, making the right eye 82 screen 7
Image 12 for the right eye is also displayed on the screen. During this time, the light shielding plate for the left eye6. An electrical signal is not applied to
Left eye light shielding plate 6. 8. The light transmittance of the left eye is low.
cannot view the right eye image 12. A stereoscopic image can be viewed by repeating the operation of separating and viewing the left-eye image and the right-eye image more than ten times per second as described above. Another embodiment of the present invention uses, for example, a magnetic tape as the video recording medium, and uses, for example, a cathode ray tube for color television as the video projection surface. In the figure, a magnetic tape 9 on which left-eye and right-eye video signals are recorded alternately every other frame is loaded into a recording/playback device 110, and then transferred to a cathode ray tube 12 of a color television receiver 11 connected to the magnetic tape 9. The left-eye image and the right-eye image f: are played back alternately every other frame, and the vertical synchronization at the recording/playback device 0 (for example, the flip 70 circuit 13e is activated by No. M, as shown in Figure 2). Generate an electrical signal similar to that shown in 2. and apply the electrical signal to the light shielding plates 6. and 6□ to change the light transmittance of the light shielding plates 6. and 6.
Light shielding plate 6. By viewing the images projected onto the plow/tube 12 throughout 62, the images for the left eye and the images for the right eye are separated and viewed as in the case of the first embodiment shown in FIG. You can therefore have stereoscopic image power! Can be viewed. As is clear from the above description, according to the present invention, even if the position of the person viewing the projection surface is different, the left eye image and the right eye image can be viewed separately, so that the stereoscopic viewing area is widened. It is wide, and since the image on the projection surface can be seen through 5 times without using special light beams, you can see an extremely natural three-dimensional image. The stereoscopic image display method according to the present invention can be applied to stereoscopic movies, stereoscopic television, stereoscopic slides, etc.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing one embodiment of the present invention, FIG. 2 is an explanatory diagram of the operation of a light shielding plate in one embodiment of the present invention, and FIG. 3 is a schematic diagram showing another embodiment of the present invention. be. 1 ..... Strip film 2 ..... Projector 3 ..... Shutter 4 ..... Switch 5 ..... Cable 6 ... ...Glasses with light-shielding plates 7 ...Screen 9 ...Magnetic tape 10 ...Recording and reproducing device 11 ...Color television receiver 12
...Cathode-ray tube 13 ...Flip-flop circuit patent applicant Hikaru Nakamura Figure 2 11 LL+ 1.1.
l〆 I+ 1゜-〉n1

Claims (1)

[Claims] The image from the left viewpoint and the image from the right viewpoint obtained by imaging from two viewpoints on the left and right are sequentially projected by alternating with one projection improvement, and this is done by synchronous V ,
Through glasses equipped with a pair of left and right light-shielding plates or mirrors whose light transmittance changes alternately in correspondence with the left and right eyes, the left eye can only see images from the left viewpoint, and the right eye can only see images from the right viewpoint. A three-dimensional image display method characterized in that a three-dimensional image appears when viewed.