JPH0578013B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stereoscopic display device that displays a focused stereoscopic image in a landscape.

It is well known that two plane images with parallax can be viewed as a 3D image when viewed separately with the left and right eyes, and are used as 3D display devices. Because the focus of the image is fixed, it is physiologically unnatural, causes a lot of eye fatigue, and is simply a three-dimensional image.

The purpose of this invention is to reduce eye fatigue by giving a focal point to a stereoscopic image caused by binocular parallax, and to display the stereoscopic image in a scenery or to view it superimposed on an object.

To explain this invention based on the drawings, the first
In the figure, a main body 1 of the display device is attached by an arm 2 and a joint 3, so that the main body 1 can move freely.

As shown in the figure, the observer leans in, but the position and direction of the eyes can be determined by detecting the angles of the four joints 3, and even if the observer changes the viewing position, , the computer immediately calculates and displays the image that will appear to the observer's eyes.

If a three-dimensional image is simply to be displayed, the joint 3 is not necessary and may be fixed. Alternatively, the main body 1 may be fixed to the head like glasses.

FIG. 2 is a diagram showing the structure of the main body 1 of the display device. The figure shows an example in which a CRT4 is used as the display. The convex lens 5 is vibrated by a vibrating device 6 in front of the screen. Note that it is the convex lens 5 that vibrates.
Only. This vibrating device 6 is adapted to move on rails 7. The rail 7 is fixed to the main body 1. A Fresnel lens may also be used as the convex lens 5.

The semi-transparent mirror 8 is attached so that the image is in the front. Since the semi-transparent mirror 8 is very close to the eye,
It is a thin mesh or gayas plate with metal thinly deposited or vapor-deposited in the form of a mesh.On the back side there is a light shutter 9 such as a liquid crystal and a polarization filter 11, making it compatible with the deflection type and light shutter type. It's set.

When the scenery is dull, the scenery is erased by closing the light shutter 9, so that only the image can be seen.

The vibration device 6 has an optical sensor that detects the position of the lens 5.

In FIG. 2, the device is for one eye.
Therefore, methods such as arranging the two devices shown in Figure 2 horizontally on the left and right, or vertically using one CRT to display left and right images at the same time are used.

In this device, the amplitude of the lens 5 can be switched in several stages. Therefore, by moving the vibration device 6, the center position of the focal point of the image is determined, and the amplitude of the lens 5 is divided into several sections.
While moving through one divided section, the left and right images are displayed one frame each. This situation is shown in FIG. 3, where the number of focal points is 2 and the display is performed in the reverse order in which the lens moves back and forth.

When the stereoscopic image to be displayed is spread over a wide range from near to far, the amplitude of the lens 5 is increased, and when the image is only located far away, the amplitude is decreased.

The screen may be slightly enlarged or reduced by moving the lens 5, but this can be corrected by, for example, making a table in memory of the reduction ratio for each position of the lens 5 and AM modulating the deflection voltage of the CRT.

This device synthesizes a single 3D image by overlapping a number of planar images with different focal points, so it requires image memory for many images, but with this method, the optical position of the screen affects the shape of the image. Instead, it is simply treated as a focal point, so it does not require as many plane images as the varifocal mirror method, but only about 1 to 10 images.

If this image data is a line drawing, etc., one dot is one word, and from the most significant digits, the focus, vertical address, horizontal address, color tone, and brightness can be written.
There is no need to allocate memory to all addresses, and the image data can be rearranged in order of focus data from large to small, and the focus data of the image data and the focus data of the display address can be compared and displayed if they match. , the memory capacity can be reduced by advancing the data to be compared by one and not displaying and not advancing the data if they do not match.

Also, for opaque images, the image memory is one piece,
If one word (one dot) has a structure of color tone, brightness, and focus, and only the focus data is compared with the position of lens 5 and displayed only when they match, (the focus of each dot is For example, in the example shown in FIG. 3, the number of focal points is 2, so to display the image once, the image memory is
It is accessed twice, one of which is the focus data and the position of the lens 5, that is, the focus is on.
Displayed only once. ) Memory capacity can be reduced.

The light that comes from one point in three-dimensional space to one eye can be said to have a direction and focal length centered on the center point of the eyeball, and therefore has all the elements of the light that enters the eye. , eye fatigue is reduced.

In addition, with this device, the object and image are brought into focus at the same time, making it possible to see the object and image superimposed.

The fact that the object and image are in focus at the same time means that
Since the optical position of the screen of the CRT 4 will be on the object, the part of the image that is aligned on the object will be on the screen, thus eliminating the effects of parallax.

Especially when inputting images with a 3D measuring device,
When the part of the image that corresponds to the detection area is focused,
Accurate image input is possible.

As explained above, this invention reduces eye fatigue by providing a focal point, and can also display a three-dimensional image in a scenery, supplement an object, and superimpose a computer-generated three-dimensional image. possible, also the first
As shown in the figure, it is possible to input images with a three-dimensional measuring device and operate the equipment while the device is attached.
It can be applied to CAD, 3D TV, etc.

[Brief explanation of drawings]

Figure 1: Panoramic view of the device, Figure 2: Cross-sectional view of the main body,
FIG. 3: A diagram explaining the display operation. 1: Main body of display device, 2: Arm, 3: Joint, 4:
CRT, 5: convex lens, 6: vibrator, 7: rail, 8: semi-transparent mirror, 9: light shutter, 10: three-dimensional measuring device, 11: deflection filter.

Claims (1)

[Claims] 1. Move the lens 5 by a combination of vibration of the lens 5 by the vibration device 6 and movement and vibration caused by the vibration device 6 itself moving on the rail 7 in front of the two screens for the right and left eyes, lens 5
By detecting the position of the lens 5 and switching the plane image according to the position of the lens 5, a stereoscopic image is generated by binocular parallax whose focus can be controlled, and this stereoscopic image is reflected by a semi-transparent mirror 8 to form a virtual image. , is a device that displays this three-dimensional virtual image at a predetermined position in the scenery seen through the semi-transparent mirror 8.
A function to detect the position and direction of the eye in order to display the image in a predetermined position relative to the scenery, a function to compare the focus data of the image data and the focus data of the display address, and a function to input three-dimensional coordinates. 3
A stereoscopic display device controlled by a dimension measuring device 10 and further equipped with a light shutter 9 for blocking the scenery of the outside world.