JP2005165237A - Method and device for displaying stereoscopic image - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and device for displaying a stereoscopic image which does not cause conflict between the convergence angle of the eye and the focusing thereof, which is the cause of the fatigue of eyes peculiar to stereoscopic vision and an unpleasant feeling, with slight equipment by electronically controlling it from a computer. <P>SOLUTION: The device for displaying the stereoscopic image is equipped with a image display device capable of displaying a image including a high-frequency stripe pattern, a lens which is arranged between the image display device and both eyes and whose focal distance differs according to a line of longitude, and a means for projecting separate images to a right eye and a left eye, and has constitution where the direction of the stripe of the high-frequency stripe pattern and the convergence angle from both eyes are interlocked in respective image areas plotted on the image display device. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

Detailed Description of the Invention

Industrial application fields

The present invention relates to a method and apparatus for displaying a stereoscopic image.

  Conventionally, a hologram is known as a stereoscopic image display method for solving the contradiction between the convergence angle of the eye and the focus adjustment, which are causes of eye fatigue and discomfort peculiar to stereoscopic vision. However, although holographic photography technology has been established, on an electronic display electronically controlled by a computer, displaying a stereoscopic moving image having the same image quality as a holographic photograph is the amount of signal to be sent to the display. Is unrealistic at this time. As a stereoscopic image display method that eliminates the contradiction between the convergence angle of eyes and focus adjustment with fewer signals, the eyes and screen are detected so that the eyes are focused on the depth corresponding to the direction of the eyes. There is a method for controlling the focal length of a lens system disposed between the two. However, this method requires an expensive mechanism for detecting the visual line direction of the pupil, and there is a problem of delay that occurs when the detection result is reflected in the control of the lens system, and further, when focusing on a certain area Another problem is that it is impossible to reproduce a phenomenon that occurs in a three-dimensional space in the natural world in which other regions at different depths are out of focus.

Problems to be solved by the invention

  As described above, in the conventional stereoscopic display method, a stereoscopic image that eliminates the contradiction between the convergence angle of the eye and the focus adjustment, which causes eye fatigue and discomfort unique to stereoscopic vision, is electronically controlled from a computer. It was difficult to display.

  The present invention displays a stereoscopic image electronically controlled from a computer, which is a minor equipment and does not cause a contradiction between the convergence angle of the eye and focus adjustment, which are causes of eye fatigue and discomfort unique to stereoscopic vision. It is an object to provide a method and apparatus.

Means for solving the problem

  In order to achieve the above object, the invention according to claim 1 is an image display device capable of displaying an image including a high-frequency stripe pattern, and a focal length by a meridian arranged between the image display device and both eyes. With different lenses and means for projecting separate images to the right and left eyes, and for each image area drawn on the image display device, the direction of the stripes of the high-frequency stripe pattern and the convergence angle from both eyes are linked It is characterized by having the structure to do.

  First, the outline of the present invention will be described with reference to FIG. FIG. 1 includes an image display device 1 and a lens 2 having a different focal length depending on meridians. On the image display device 1, a screen 4 that is generally observed only in the left eye and a screen 5 that is generally observed only in the right eye are displayed. Of the images displayed on the screen, the image 6 that is desired to be displayed far away is displayed on the screen 4 and the screen 5 so that the convergence angle is small, and the image 7 that is desired to be displayed nearby is such that the convergence angle is large. Display on screen 4 and screen 5. The image 6 and the image 7 are each uniquely given a depth calculated from the convergence angle. The image 6 and the image 7 are displayed by superimposing a high-frequency striped pattern having an inclination corresponding to the calculated depth. The depth corresponding to the inclination of a certain striped pattern is the depth of the light that spreads in the direction perpendicular to the inclination line, and the light generally connects a virtual image or a real image. When the focal length of the lens 2 is different in the meridian direction, the depth of light that spreads in the direction perpendicular to the inclination of the stripe pattern changes depending on the inclination of the striped pattern. It is possible to assign the inclination of the striped pattern to be performed. Eye focus adjustment tends to be strongly influenced by high-frequency patterns, and when presenting a striped pattern, only the direction perpendicular to the tilt of the stripe affects the defocus of the image, so it has a tilt corresponding to the depth. By superimposing the high-frequency striped pattern, it is possible to guide the focus adjustment of the eye to a position where there is no contradiction in the convergence adjustment.

  A first embodiment of the present invention will be described below with reference to FIG. In this embodiment, as a method of presenting different images to both eyes, the optical system 11 for inputting different images to the right eye 9 and the left eye 10 of the observer 8 has a focal length due to the image display device 1 and meridians. Arranged between different lenses 2. The optical system 11 can be realized by a method using a known reflecting mirror or prism. A concave or convex cylinder lens is used as the lens 2. The image display device 1, the lens 2 having a different focal length in the main meridian direction, and the optical system 11 for inputting different images to the right eye 9 and the left eye 10 are configured as a head-mounted display that can be mounted on the head of the observer 8. It is also possible to do.

  Hereinafter, a second embodiment of the present invention will be described with reference to FIG. In this embodiment, as a method of presenting different images to both eyes, instead of the normal image display device 1, an image display device 12 that can display two types of separable images, and one of these two types of images. A stereoscopic glasses device 13 that selectively transmits a different one and can be seen by each of the right eye 9 and the left eye 10 of the observer 8 is used. As a combination of the image display device 12 and the stereoscopic glasses device 13, a known glasses-type stereoscopic image display method such as use of a CRT and a liquid crystal shutter or a polarizing filter can be used. When a large-screen display device is used as the image display device 12, a cylindrical Fresnel lens can be used as the corresponding large lens 2.

  Hereinafter, a third embodiment of the present invention will be described with reference to FIG. In this embodiment, as a method of presenting different images to both eyes, instead of the image display device 12 and the stereoscopic glasses device 13 of the second embodiment, an autostereoscopic device capable of observing different images depending on the observation position. An image display device 14 is used. Such autostereoscopic image display devices include a plurality of known devices such as a parallax barrier method and a lenticular lens method.

The invention's effect

Since this invention consists of an above-described structure, there can exist an effect which is demonstrated below.

  According to the first aspect of the present invention, it is possible to electronically control, from a computer, a stereoscopic image that resolves the contradiction between the convergence angle of the eye and the focus adjustment, which is a cause of fatigue and discomfort unique to stereoscopic vision, with minimal equipment. Can be displayed.

It is a schematic diagram which shows the outline of this invention. It is a schematic diagram which shows 1st embodiment of this invention. It is a schematic diagram which shows 2nd embodiment of this invention. It is a schematic diagram which shows 3rd embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Image display apparatus 2 Lens with different focal lengths by meridian 3 Eye 4 Screen that is observed almost only on the left eye 5 Screen that is observed only about the right eye 6 Image displayed far away 7 Image displayed near 8 Observer 9 Right eye 10 Left eye 11 Optical system 12 for inputting different images to each eye Image display device 13 capable of displaying two types of separable images Stereoscopic glasses device 14 Autostereoscopic image display device

Claims (1)

  An image display device capable of displaying an image including a high-frequency striped pattern, a lens disposed between the image display device and both eyes and having different focal lengths depending on meridians, and means for projecting separate images to the right and left eyes A method and apparatus for displaying a three-dimensional image, comprising: a configuration in which a stripe direction of a high-frequency stripe pattern and a convergence angle from both eyes are interlocked for each image region drawn on an image display device .

Images