JPS6223696A - Stereoscopic picture display device - Google Patents

Abstract

PURPOSE:To eliminate deterioration in display caused by an after image of alternate display of a picture from 2 visual points by dividing finely a picture display screen spatially and assigning two polarization characteristics to each division in a device of polarization spectacles system. CONSTITUTION:The picture from two visual points picked up by image pickup devices 1 and 2 or the picture from two visual points stored in a storage device 3 is displayed on a picture display device 5 by a display controller 4. The picture from one visual point is subjected to identical polarization on the entire screen and the picture from the other visual point receives the polarization orthogonal to that as above. The polarization spectacles 6 have polarization characteristics orthogonal to each other. As a result, the left eye perceives the picture from the left visual point and the right eye perceives the picture from the right visual point and an observer 7 can get stereoscopic feeling.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a stereoscopic image display device using polarized glasses, and particularly a stereoscopic image display suitable for performing stereoscopic display without image deterioration due to afterimages with a simple device. Regarding equipment.

[Background of the invention]

Conventional devices are discussed in the literature (Oishi, Okoshi, and Nakayama: Image Display, Corona Publishing (1975)). Stereoscopic image displays give a three-dimensional effect by perceiving images from different imaging viewpoints to the left and right eyes, and include two-color glasses, two-hour and minute-side methods, balaxbara methods, two-image (peeping glasses) methods, and polarization methods. and so on. Of these, the two-color glasses system poses problems for eye health, and the 6 o'clock side system, which cannot display color images, requires alternate shielding devices for the left and right eyes. The balarax barya system and the two-machine system have problems such as the viewpoint being fixed. The polarization method does not have these drawbacks, and all you need to do is wear glasses with polarization characteristics that are perpendicular to the left and right.

Conventional 3D image displays using polarized glasses include the 2CRT method that uses semi-transparent mirrors and the polarization time switching method, but the former requires a large device to combine the two displays, and the latter requires a large amount of time. Disadvantages include the afterimage of images from two viewpoints that are displayed alternately and the complexity of the polarization switching device.

[Purpose of the invention]

The present invention has been made in order to eliminate the above-mentioned drawbacks, and its purpose is to provide a polarized glasses system that does not require a device that temporally switches polarization and that does not cause afterimage deterioration due to alternating display of images from two viewpoints. An object of the present invention is to provide a stereoscopic image display device.

[Summary of the invention]

In order to achieve the above object, the present invention provides an image display device with a transparent polarization plane in which two orthogonal polarization characteristics appear alternately within a plane, and stereo images obtained from two viewpoints are displayed on the image display. so that they appear alternately according to the transparent polarized light, and by the transparent polarized light plane,
The present invention is characterized in that a device is provided for controlling the display position so that the two images have polarization characteristics perpendicular to each other.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to FIGS. 1 to 3. FIG. 1 is an explanatory diagram of a stereoscopic image display device using general polarized glasses. Images from two viewpoints captured by the imaging devices 1 and 2 or images from two viewpoints stored in the storage device 3 are displayed on the image display 5 by the display control device 4. An image from one viewpoint receives the same polarization throughout the screen, and an image from the other viewpoint receives polarization orthogonal to this. The polarized glasses 6 have mutually orthogonal polarization characteristics. As a result, the left eye perceives an image from the left viewpoint, the right eye perceives an image from the right viewpoint, and the II priest 7 can obtain a three-dimensional effect. FIG. 2 is a computer output display according to the present invention. Digital image data Xa (1+j) and X r (l p J ) from two viewpoints obtained by the computer system 8 are stored in storage devices 9 and 10, respectively. Here, i is a horizontal image number and j is a line number.The display control device 4 reads image data alternately from the surface storage devices 9 and 10 for each line number j, and Xi (itj)tX
, (llj)t Xi(21j)l! , (21j)・
. . and regarded as normal digital image data, each display cell 11 of the image display 5 is caused to emit light. The display cell 11 can be realized using a liquid crystal display cell, a plasma display cell, or the like. In the case of a liquid crystal display, a light source is placed on the back and is of a transmissive type. There is a transmission polarization plane 1 in front of the display cell.
Place 2. The direction of polarization of the transparent polarizing plane 12 is horizontal for odd-numbered display cells in the horizontal direction, and vertical for even-numbered display cells. The polarization direction of the polarized glasses 6 is such that the left eye is horizontal and the right eye is vertical. Further, in order to prevent dark vertical stripes from appearing on the screen, a horizontal diffusion surface 13 is placed in front of the transparent polarizing surface 12.

FIG. 3 shows a stereoscopic image display device using a CRT according to the present invention. Two imaging devices placed on the left and right (
For example, video signals from ITVs 1 and 2 are sent to display dots 16 on a fluorescent screen 15 by a multiplexer 14.
is switched alternately at intervals of time a corresponding to the distance between 1
merged into one video signal. This video signal is displayed on a CRT 18 by a conventional electron beam scanning device 17. A transparent polarizing plane 19 is placed on the display dot 16 on the phosphor screen 15 in the same manner as in FIG. The direction of polarization is alternately horizontal and vertical. Note that the multiplexer 14
Errors in the switching period and phase cause a positional shift between the left and right image signals and each polarization plane, which prevents accurate stereoscopic display. The calibration imaging device 20 receives only one polarized image through the polarizing filter 21 . Now, when inputting full black to one and full white to the other, the error in the switching cycle and phase described above will appear as moire fringes on the image captured by the device 20. .

The moiré fringe analysis device 22 analyzes the moiré fringes to obtain the parameter a (j ) in FIG. 4 for each line number j on the storage device 23.

Estimate the correct value of b(j) and rewrite the contents of the memory bag @23.

In the embodiment of the present invention using a CRT explained with reference to FIG. It is possible to carry out the invention.

〔Effect of the invention〕

According to the present invention, the image display surface is spatially divided into two parts.
Since the two polarization characteristics are assigned, there is no need for a conventional device that switches polarization over time, and there is no display deterioration caused by afterimages caused by alternating display of images from two viewpoints. can be provided.

[Brief explanation of the drawing]

Claims (1)

[Claims] 1. In an image display device, a transparent polarizing plane in which two orthogonal polarization characteristics appear alternately in the horizontal or vertical direction, and an image obtained from two viewpoints are displayed on the transparent parallel plane on the image display. are displayed spatially alternately according to the
A stereoscopic image display device comprising a display control device that polarizes an image obtained from one viewpoint in the same manner and polarizes an image obtained from another viewpoint so as to be orthogonal to the polarization. 2. The three-dimensional image display device according to claim 1, characterized in that a blurring plate is provided on the front surface of the image display device to avoid the occurrence of black stripes in each polarized image. 3. The display control device includes an image capturing device that captures only one polarized image, a device that generates a test pattern in which the image from one viewpoint is black and the other white, and a device that generates a test pattern based on the captured image of the test pattern. The stereoscopic image display device according to claim 1, further comprising a device for correcting the image display position.