JPS58223116A - Stereoscopic display device - Google Patents

Abstract

PURPOSE:To relieve the fatigue of the eyes, by vibrating a lens in front of an image plane, changing over a plane picture image according to the position of the lens to generate a stereoscopic image having a focus, and displaying the virtual image of the stereoscopic image in the scene visible through a semitransparent mirror. CONSTITUTION:An example wherein a CRT 4 is used for a display of a body 1 of a titled display is illustrated. A convex lens 5 is kept vibrated by an vibrator 6 in front of an imaging plane. The vibrator 6 is made movable on a rail 7 and the rail 7 is held fixed to the body. A semitransparent mirror 8 is so mounted that the picture image comes on the front surface. If the scene is obstructive, an optical shutter 9 is closed to put out the scene, so that only the image is visible.

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 seen separately by the left and right eyes as a 3D image, and are used as 3D display devices, but conventional devices can Because the focus of the eyes is fixed, it is physiologically unnatural, causes a lot of eye fatigue, and is simply a matter of viewing a three-dimensional image.

The purpose of this invention is to reduce eye fatigue by providing a focal point, and to allow a three-dimensional image to be viewed superimposed on an object displayed in the scenery.

To explain this invention with reference to the drawings, in FIG. 1, a main body 1 of a display device is attached by an arm 2 and a joint 8, and the main body 1 can be freely moved.

As shown in the figure, the observer looks into the eye, and the position and direction of the eyes can be determined by detecting the 80 angles of the four joints, and a computer calculates the image that will appear in the observer's eyes. indicate.

If only a three-dimensional image is to be displayed, the joint 8 #ri is not necessary and can 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 using an rcCRT 4 display.

The convex lens 5 is vibrated by a vibrating device 6 in front of the screen. This vibrating device 6 is adapted to move on rails 7. It is fixed to the rail 7 and the main body 1. Convex/Z5 also uses a Fresnel lens.

Semi-transparent mirror 8V'i, VC attached so that the image is in front. Since the semi-transparent mirror 8 is very close to the eye, it is made of a thin mesh, a glass plate with a thin layer of metal, or a mesh-like vapor-deposited mirror. is now possible.

The vibration device 6 has a light beam 7/circle, and the position of the beam 5 is detected.

In Figure 2' the device is for one eye.

Therefore, two devices shown in FIG. 2 may be arranged horizontally on the left and right, or one CRT may be arranged vertically to display left and right images simultaneously.

In this device, the amplitude of the H/Z 6 can be changed in several steps. Therefore, by moving the vibrating 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, and while the lens 5 moves in one divided section, the left and right sides each receive one frame. Display one by one. This situation is shown in Figure 8, where the number of focal points is 2 and the display is performed in reverse 1 order when the lens moves back and forth. If so, increase the amplitude of the comb
Also, if the image is only far away, the amplitude is reduced.

The screen is slightly enlarged or reduced by the movement of 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 performing AM modulation on 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. Because it is treated simply as a focal point, it does not require many plane images like the one-type varifocal mirror, and the
There are about 10 pieces.

For this image data as well, in the case of line drawings, etc., each dot is treated as one word, and from the highest digit, the focus, vertical address, horizontal address, color tone, and brightness are arranged, and the data is arranged in large and small IINK.
Memory capacity can be reduced by comparing it with the display address (scanning address) and if it matches, displaying it and advancing the data to be compared by one, and if it does not match, not displaying it and not advancing the data. .

For opaque images, one image memory is used, and one word (1
Dot), create a structure of color tone, brightness, and focus.
By comparing only the focus data with the position of the lens 5 and displaying it only when they match (only one focus of each dot is selected from a given number of focuses), memory capacity can be reduced.

One eye from one point in eight-dimensional space [The incoming light can be said to have a direction and focal length centered on the center point of the eyeball,
Therefore, it has all the elements of 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.

As explained above, this invention reduces eye fatigue by providing a focal point, and also displays a three-dimensional image in the scenery. In addition, as shown in Figure 1, it is possible to input images using a VC 8-dimensional measuring device and operate the device while the device is attached, so it can be applied to ICCAD, 3D television, etc.

[Brief explanation of the drawing]

Figure 1: Panoramic view of the device Figure 2: Cross-sectional view of the main body Figure 8:
Figure 1 explaining display operation: Main body of display device 2: Arm 8: Joint 4: C
RT 5: Convex lens 6: Vibration device 7: Rail 8: Semi-transparent mirror 9: Optical shutter l0 = 8-dimensional measuring instrument 11: Polarizing filter patent applicant Sou 1) Tetsu
Mr. Kazuo Wakasugi, Commissioner of the Western Patent Office1. Indication of the case Patent Application No. 105894 filed in 19822, Name of the invention 3D display device 3, Person making the amendment 4, Date of amendment order Initiation 5, Subject of amendment (1) Scope of claims in the description (1) Amend the claims as shown in the attached sheet. Add the following between the lines. 1 and above display images for the left eye and images for the right eye separately, and display a stereoscopic image based on parallax. As shown in my patent application No. 55-137021, the screen can be moved apparently (optically) by moving the lens, so one screen 12 can be moved by one convex lens 5 as shown in FIG. Images can be displayed at any position (distance). In this display method, the screen position is lens 5,
The image is determined by the screen 12, the hand transparent #1t8, and the optical system, so even if the main body 1 is not fixed to the head as shown in Fig. 1, if you look into it from near the front of the main body 1, the image will be It appears to be in a fixed position. In this case, the image is Toru F! A, in other words, there is a phenomenon in which an image in the front that would normally be hidden from view becomes visible. For example, when displaying a regular cube,
A situation occurs in which the sides become abnormally bright, and if we try to display images such as those we see every day (photographs and television), it is theoretically difficult to display information about the direction of light from each pixel. For example, it would be necessary to vibrate the engineering P board or the hologzum. This is unrealistic. However, the method of viewing one screen with both eyes requires an image with parallax. It is convenient depending on how you use it because it does not
For example, when operating various types of vehicles or equipment, it may be convenient to be able to obtain information such as images, numbers, and text while working. For example, if you are an airplane pilot, if you display two screens at infinity and 50 crn as shown in Figure 4, when you are looking at the scenery you will see the screen at infinity, and when you are looking at the instruments you will see two screens at infinity. You can view necessary data such as ponding speed on the 50cFn screen. As another example of application, a number of panel displays such as objects or liquid crystals are stacked near the focal point of lens 5 in Figure 4.
By placing a dimensional image or simply a television image, it can be enlarged and displayed at any position (distance) in the air. Furthermore, if a panel display is used as the display means, the device can be shaped like glasses. Next, we will explain some other methods for moving the screen. If you simply want to move the screen, you can change the direction of the mirror and move the lens placed parallel to the screen in front of the screen in the plane direction, but ideal characteristics can be obtained by using a lens plate. Therefore, I will explain it in a diagram as well. As shown in Figure 5, the basic lens plate consists of a large number of microlenses arranged on the front side so that they share a focal point and optical axis with each other. , and the incident light and transmitted light are symmetrical with respect to the lens plate surface.
It is the same as the directional screen shown in Figures 3 to 6 of No. 158320. The resulting three-dimensional image is used to create a real image in front of the lens plate using a lens plate, but it is technically difficult to directly move the CRT, so my patent application No. 55-
The method shown in Figure 8 and Figure 10 is applied to the method of moving the lens as in No. 137021. In the present invention, the lens plate is used more like a lens than a directional screen, so it is called a lens plate. I'll decide. Therefore, almost the same effect can be achieved by using a single lens instead of a lens plate, but using a lens plate allows ideal optical path control. In the present invention, in order to effectively control the optical path, the focal length ratio and optical axis of the microlenses are shifted. FIGS. 6 and 7 are enlarged views of a portion of the lens plate shown in FIG. 5. First, to explain the case of changing the focal length ratio as shown in Figure 6, if the focal length of the microlens on the front is f and the focal length of the microlens on the back is fB, then refer to # in the figure. To explain in terms of the rumored angle, when the focal lengths of the microlenses on the back side of the front are equal, light incident at an angle of 0 is transmitted at an angle of θ+r, which is an addition of r in the direction in which the optical axis is shifted. To explain the method shown in FIG. 8, the focal length of the lens plate Ll is short on the CRT side and long on the viewer side. When the lens plate L1 is at MO, the light emitted from any point P on the screen is focused at P2, so the screen appears to be in town. Next, when the lens plate L1 is at Mo, the screen The light emitted from an arbitrary point cLl above is focused on Ql, and the screen appears to be at N1. Therefore, by vibrating the lens plate Ll, the CRT screen can be vibrated. The amplitude of the screen is twice the amplitude of the lens plate L1 multiplied by the ratio of the focal length, so the amplitude of the lens plate can be small. Figure 9 shows how to create a virtual image by inverting the real image formed on the observer's side using the lens plate Ls to the other side of the lens plate as shown in Figure 8.In addition, if a Fresnel convex lens is placed in front of the lens plate L3, Both the screen size and amplitude can be increased. FIG. 10 shows a lens plate L4 with the optical axis of the microlens slightly shifted toward the center of the lens plate.
The light incident perpendicularly to I4 is focused at one point as shown in the figure. Therefore, if you keep this in mind, each pixel on the screen will look in the same direction even if the screen vibrates, so the image for the right eye and the image for the left eye will be displayed separately, and the full 3D image will be displayed depending on the parallax. In this case, the characteristics are ideal, but even in this case, it can also be used to see with both eyes as shown in Figure 4. Figure 11 shows a lens whose refractive index increases toward the center, as shown by the dotted line. A large number of cut parts are arranged to form a lens plate.
5 is a partial perspective view of the lens plate, and FIGS. 6, 7, and 11 are enlarged sectional views of FIG. 5. 12: Screen 15. L, -L4: Lens plate 14: Dispersion J
'Aヱ. 2゜The lens is photographed in front of the screen, the position of the lens is detected,
A device that generates a focused three-dimensional image by switching the two-dimensional image depending on the position of the lens, reflects this three-dimensional image with a semi-transparent mirror to create a virtual image, and displays the three-dimensional virtual image in the scenery seen through the semi-transparent mirror. A 3D display device that has a function to detect the position and direction of the eyes, and reduces image memory capacity by comparing image data and display addresses. JILG diagram 1. M.

Claims (1)

[Claims] A lens is vibrated in front of two screens for the right and left eyes, the position of the lens is detected, and a focused 3D image is generated by switching the plane image depending on the lens position, and this 3D image is converted into a semi-transparent mirror. This is a device that superimposes this three-dimensional virtual image and the scenery through a semi-transparent mirror.The device has the function of detecting the position and direction of the eyes, and
A stereoscopic display device that reduces image memory capacity by comparing image data and display addresses.