JP2004054193A - Stereoscopic display without using spectacles - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stereoscopic display that does not require special spectacles and has a simple system and high image quality. <P>SOLUTION: On the display surfaces of two image displays (1), (2) being arranged at right angles, louver film filters (3), (4) where visible angles facing the left-and right-eye directions of an observer each are set are arranged, a combiner (5) is arranged at an angle for dividing the two image displays into two for synthesizing an image for left eye and that for right eye for displaying, the visible range limitation effect allows the right and left eyes of the observer to see separate images, and parallactic stereoscopic effect can be obtained. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a three-dimensional image display device that does not require special glasses using a louver film filter for separating a right-eye image and a left-eye image.
[0002]
[Prior art]
As a conventional stereoscopic video apparatus that does not require special glasses, there has been a parallax barrier system in which one display video is separated into a right-eye video and a left-eye video using an image splitter.
[0003]
[Problems to be solved by the invention]
This has the following disadvantages.
A complicated image process was required in which the left and right images were vertically divided, thinned out, and alternately arranged to prepare one image.
Further, the amount of video information in the horizontal direction was reduced to に よ り by the thinning out of the video division, and high image quality could not be obtained.
The present invention has been made to eliminate such disadvantages.
[0004]
[Means for Solving the Problems]
In the present invention, louver film filters (3) and (4) are used as means for separating a left-eye image and a right-eye image, and a left-eye image and a right-eye image are displayed on two image display devices (1) and (2). Are displayed independently, and these are combined and displayed by the combiner (5).
This is a three-dimensional display device having the above configuration.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described.
The left-eye image and the right-eye image are respectively displayed on two image display devices (1) and (2) arranged at right angles.
Which of the two video display devices displays the left or right eye video is optional, but one always displays the left eye video and the other displays the right eye video.
The louver film filters (3) and (4) are placed immediately before the image display devices (1) and (2).
When displaying an image for the left eye on the image display device (1), the louver angle of the louver film filter (3) is set to the left eye direction of the observer, and the louver film filter (4) is a louver opposite to the left and right. Set the angle.
When displaying an image for the right eye on the image display device (1), the louver angle of the louver film filter (3) is set to the right eye direction of the observer, and the louver film filter (4) is a louver opposite to the left and right. Set the angle.
FIG. 2 shows a method for setting the louver angle of the louver film filter (3).
In FIG. 2, the louver angle is set to the left eye direction of the observer. Therefore, the left eye of the observer can see the image displayed on the image display device (C) behind the louver filter (A), but the line of sight (E) of the right eye is blocked by the louver (B). I can't see the video. The louver angle (H) is an angle at which a visual line of sight determined by the distance (F) between the eyes of the observer and the distance (G) from the image display surface to the eyes of the observer enters.
For this reason, as shown in FIG. 2, the louver angle is set to the maximum angle at the end opposite to the visible eye in accordance with the angle at which the line of sight enters. .
However, in order to reduce the cost of the louver film filter, if the deterioration of the crosstalk performance is acceptable, the angles of all the louvers may be equalized within the range of the maximum angle or less.
The image projected on the image display device (2) on the side to be reflected on the combiner is subjected to a left-right reversal process so that it is projected as a normal image when projected on the combiner.
In the vertical direction of the display image, the base where the image display device forms a right angle is aligned upward or downward.
The combiner is mounted at a 45 degree angle at a position where the two video display devices (1) and (2) arranged at right angles are bisected.
The reflective surface of the combiner faces the observer.
The combiner transmits 50% of the light as viewed from the observer side and reflects 50% of the light, so that two images are superimposed.
The display image of the image display device (1) passes through the combiner (5) and reaches the observer's eyes, but is restricted to only one of the left eye and the right eye due to the restriction of the viewing angle of the louver film filter (3). It does not reach and does not reach one eye. To the eyes to which the image of the image display device (1) does not reach, the image of the image display device (2) projected on the combiner (5) is seen instead.
The viewing angle of the image of the image display device (2) is also regulated by the paired louver film filter (4), and this effect cannot be lost even after being reflected on the combiner. The image is delivered only to the eye opposite to the visible eye. As a result, parallax occurs and the observer can perceive the image as a stereoscopic image.
[0006]
【The invention's effect】
According to the present invention, the system is simplified because only one image on the side to be projected on the combiner needs to be inverted left and right in the image processing.
Further, since the thinning of the video signal is not performed from either the left-eye video or the right-eye video, there is little deterioration in image quality.
[Brief description of the drawings]
FIG. 1 is a perspective view of a product of the present invention.
(1) Image display device (2) Image display device (3) Louver film filter (4) Louver film filter (5) Combiner [Fig. 2] Illustration of setting method of louver angle [Explanation of reference numerals]
(A) Louver film filter (B) Louver (C) Image display device (D) Visual line of sight of observer (E) Line of sight obstructed by louver of observer (F) Distance between observer's eyes ( G) Distance from image display surface to observer's eye

Claims (5)

The louver film filters (3) and (4) are arranged on the display surfaces of the two image display devices (1) and (2) that respectively display images for the left eye and the right eye arranged at a right angle. The right-eye image and the left-eye image are combined and displayed by arranging the combiner (5) at a position of 45 degrees that divides the formed right angle into two. A three-dimensional display device that projects an ophthalmic image to an observer's eyes while keeping it separated. The louver angle of the louver film filter (3) is an angle inclined to the right or left eye of the observer when viewed on the combiner when viewed from the observer, and the louver angle of the louver film filter (4) is a louver film filter. A stereoscopic display device set at an angle opposite to that of (3). An image display device for a right eye is displayed on an image display device paired with a louver film filter in which an inclination of a louver angle is set in a right eye direction of an observer, and an image for a left eye is displayed on the other side. In addition, the same applies to the case where the left and right are reversed. The right-eye image and the left-eye image are separately displayed on the two image display devices (1) and (2), and the virtual image is displayed on the combiner (5). 3D display device. A three-dimensional display device with the reflective surface of the combiner facing the viewer.

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