JPH06105341A - Stereoscopic vision display method - Google Patents

Abstract

PURPOSE:To attain the stereoscopic vision from many directions by giving an electric signal to a polarized filter comprising three layers so as to vary the transmission angle of a light periodically thereby assigning left and right eye use video images to the left and right eyes respectively. CONSTITUTION:A polarized filter is of three-layer structure each comprising polarized planes A-C, the phases of the planes A, B differ 90 deg. from each other, and the plane C is electrically switched to the planes A, B synchronously with the switching of the video image. The polarized plane C3 of the filter 4 is switched in the order of A-B-A..., and the polarized plane C3 of the filter 5 is switched in the order of B-A-B... sequentially. When only the filters 4, 5 exist, a filter 6 blocks the right eye use video image made incident in the direction of the left eye 10. The switched 1st stage of the filter transmits the right eye use video image 7 in the direction of the right eye 11, and the 2nd stage transmits the left eye use video image in the left eye direction. The two operations are implemented synchronously with the left eye and right eye use video images displayed alternately at the speed of a prescribed frequency Hz or over.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereoscopic display method used in a three-dimensional stereoscopic image display device.

[0002]

2. Description of the Related Art Conventionally known stereoscopic display methods include a binocular type and a multi-lens type. As a representative of each, what is being used and studied is a polarized glasses system for the two-lens system and a lenticular system for the multi-lens system. Both of them make use of the difference between the images viewed by the left and right eyes and the binocular parallax, and each has its own method. The polarized glasses method has a light phase of 90 on a display such as a television.
Displays different images for the left and right eyes, and the polarization plane is 90 degrees.
By wearing glasses in which different lenses are attached to the left and right to observe images corresponding to the left and right eyes, binocular parallax occurs, and stereoscopic vision is realized. On the other hand, the lenticular system uses a lens plate in which a large number of kamaboko type lenses are arranged in the vertical direction, that is, a display device in which a display is arranged on the back focal plane of the lenticular plate. A plurality of vertical strips of images taken from multiple viewpoints are displayed in order, and when this display device is observed, the left and right eyes observe the images corresponding to the respective viewing angles due to the refraction of the lens. This is a method in which binocular parallax is generated, stereoscopic vision can be realized, and corresponding images can be sequentially observed even when the viewpoint is moved, so stereoscopic vision from another direction can be realized. Furthermore, a display in which a liquid crystal panel LCD1 that generates a thin strip-shaped slit in the vertical direction and a liquid crystal panel LCD2 that displays left-eye and right-eye images forming a three-dimensional image are stacked is used in the three-dimensional image display system that has been recently considered. There is a liquid crystal active barrier system. This system observes the image corresponding to each left-eye and right-eye position in the stripe by observing the striped image in which the vertically long left-eye and right-eye images are alternately displayed on the LCD 2 through the thin vertically long slit barrier by the LCD 1. This is a method in which binocular parallax is generated and stereoscopic vision is realized. According to this method, since the stereoscopic image display section and the slit / barrier section are both made of liquid crystal panels, the widths of the stripe image and slit can be changed in several steps, so it is possible to select between two eyes and multiple eyes. The stereoscopic view from the direction can be realized, and if a two-dimensional image is displayed in the area other than the slit portion of the LCD 2, a two-dimensional and three-dimensional mixed image can be displayed.

[0003]

Among the above-mentioned conventional methods, the polarized glasses method has a drawback in that glasses are required. Eyeglasses are very troublesome for people who are unfamiliar, and can be a major obstacle to the practical application of stereoscopic vision. Secondly, since only one viewpoint is considered in this method, even if the viewpoint is moved, only the same image can be seen. This is totally unnatural,
This is a problem to be solved in the realization of a stereoscopic image display device that improves the sense of reality. The lenticular method is a very advanced method that can realize stereoscopic vision from other directions, but there are many factors to be calculated in lens design such as lens width, radius, thickness, and refractive index. In addition, the size and position of the pixel of the display that displays the image requires high accuracy, and it is still very difficult to realize. In order to solve these drawbacks, an object of the present invention is to realize stereoscopic vision from multiple directions without glasses in a simpler method. In addition, the above-described method has a drawback in that only a stereoscopic view can be observed from a limited direction even though it is a multi-view type, and an inverse stereoscopic view in which the sense of depth is reversed is observed between them. Further, in order to realize stereoscopic viewing from the other direction with the same resolution, a high resolution liquid crystal panel display is required. The present invention solves these drawbacks, and an object thereof is to realize stereoscopic vision from any arbitrary direction without requiring a high-resolution liquid crystal panel display.

[0004]

[Means for Solving the Problems] A polarizing filter in which strip-shaped polarization planes are sequentially arranged in the vertical direction having different 90 ° phases on a video display is composed of three layers which are slightly shifted in the horizontal direction. By the video display device with the polarized filter panel arranged, an electric signal is periodically applied to the polarization filter in synchronization with the left-eye and right-eye video displayed on the video display to change the light transmission angle periodically. Thus, the left-eye and right-eye images are distributed to the left eye and the right eye, respectively, thereby realizing stereoscopic vision from multiple directions.

[0005]

With this method, the left-eye image can be observed on the right side of the viewpoint position and the right-eye image can be observed on the left side of the viewpoint position on the display. Therefore, stereoscopic vision can be realized between the viewpoint positions. Also, as the viewpoint moves in the horizontal direction, each image corresponding to the viewpoint position can be continuously observed on the left and right eyes, so that stereoscopic viewing from any direction can be realized, and reverse stereoscopic viewing is also possible. Can be stopped.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention provides one left-eye image and right-eye image 60.
A polarizing filter, which is divided into strips in the vertical direction, is arranged on a display which is alternately switched and displayed at a speed of Hz or more, and the image corresponding to the left eye and the right eye is distributed by this filter. FIG. 1 shows a configuration diagram of a polarization filter of this display device. In the figure, the filter has a three-layer structure and is composed of a polarization plane A1, a polarization plane B2, and a polarization plane C3, respectively. The polarization plane A1 and the polarization plane B2 are out of phase with each other by 90 degrees, and the polarization plane C3 is electrically switched to the polarization plane A1 and the polarization plane B2 in synchronization with the switching of the image. 2 and 3 show operation diagrams of this display device. Figure 2
In, the polarization plane C3 of the first filter 4 is ABAB
-A are alternately switched in order of the second filter 5
The polarization plane C3 is alternately switched in the order of B-A-B-A-B. The third filter 6 has a role of blocking the right-eye image 9 that is incident in the direction of the left eye 10 only by the first filter 4 and the second filter 5. At this time, the polarization filter transmits the right-eye image 7 only in the right-eye 11 direction.
In FIG. 3, the polarization plane C3 of the first filter 4 is B-A-B.
-A are alternately switched in order of the second filter 5
The plane of polarization C3 is alternately switched in the order of ABAB. At this time, the polarization filter transmits the image 8 for the left eye only in the direction of the left eye 10. 60Hz for these two operations
It is performed in synchronization with the left-eye and right-eye images alternately displayed at the above speed. By this method, on the display,
As shown in FIG. 4, the left-eye image 1 is displayed on the right side of the viewpoint position 13.
6 can see the right-eye image 15 on the left side of the viewpoint position 14. Therefore, stereoscopic vision can be realized between the viewpoint position 13 and the viewpoint position 14. Further, as the viewpoint moves in the horizontal direction, each image corresponding to the viewpoint position can be continuously observed by the left eye and the right eye, so that stereoscopic viewing from any direction can be realized, and by the action of the third filter 6, it is possible to reverse. It is possible to prevent stereoscopic observation. Next, a more detailed embodiment of the present invention will be described with reference to FIG. In the figure, the three-dimensional image display device 17 is a three-layer polarization filter panel 1 on an image display display 18.
9 has a cylindrical shape and has a parallax angle of 20 regardless of the direction on the display with the head fixed.
Is designed to be constant at all times. The video display display 18 alternately displays the right-eye image and the left-eye image at a speed of 60 Hz. In synchronization with this, the plane of polarization C is electrically switched to the plane of polarization A and the plane of polarization B so that the image for the left eye enters in the left eye direction and the image for the right eye enters in the right eye direction. Therefore, the left-eye image of 30 Hz can be observed by the left eye, and the right-eye image of 30 Hz can be observed by the right eye, and stereoscopic vision is realized between the viewpoint position l13 and the viewpoint position r14. The parallax angle α is always constant even if the head is rotated and the observation direction is changed while maintaining the position, so that the state in which stereoscopic vision is realized between the viewpoint position 13 and the viewpoint position 14 is maintained, and in that direction. You can observe stereoscopic images. Therefore, stereoscopic viewing from any direction can be realized in all areas of the stereoscopic video display device.

[0007]

With this display method, stereoscopic viewing from multiple directions can be realized without developing a special high-resolution video display or a lens plate requiring special technology, and without using glasses. You can

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of the present invention.

FIG. 2 is a diagram showing the operation and action of the present invention.

FIG. 3 is a diagram showing the operation and action of the present invention.

FIG. 4 is a diagram showing the principle of the present invention.

FIG. 5 is a diagram showing a system configuration of an embodiment of the present invention.

[Explanation of symbols]

 1 Polarization plane A 2 Polarization plane B 3 Polarization plane C 4 First filter 5 Second filter 6 Third filter 7 Right eye image R 8 Left eye image L 9 Right eye image L '10 Left eye 11 Right eye 12 Stereoscopic image display device 13 Viewpoint position l 14 Viewpoint position r 15 Right eye image display portion 16 Left eye image display portion 17 Cylindrical stereoscopic image display device 18 Image display display 19 Three-layer polarizing filter panel 20 Parallax angle α

Claims (1)

[Claims] 1. A polarizing filter panel comprising three layers in which one polarizing filter, in which vertical strip-shaped polarizing planes having different 90-degree phases are sequentially arranged on a video display, is slightly shifted in the horizontal direction. By the video display device arranged, the left eye by cyclically synchronizing the left eye for the right eye video displayed on the video display display with an electric signal to the polarization filter and periodically changing the light transmission angle, Stereoscopic display method characterized by allocating left-eye and right-eye images to the right eye