JPH0348810A - Polarization spectacles for observing stereoscopic image - Google Patents

Abstract

PURPOSE:To obtain polarization spectacles for obtaining an image having a bright stereoscopic effect from which the influence caused by an inclination of an observer's head is eliminated by providing a polarizing plate of a size corresponding to an angle of visibility for observing a display from an adequate observation distance on an opening part, using an opaque member for part other than the opening part and cutting off an unnecessary external light. CONSTITUTION:An opening part 1 using a polarizing plate is determined so that a screen 23 can be viewed in full size of the opening part (polarizing plate) 1, when this polarization spectacles are worn and the screen 23 is observed at an adequate observation distance. Also, a blind 2 covers the whole visual field except the screen. In such a way, an involuntary motion for allowing the screen 23 and the opening part 1 to coincide with each other is solicited, and an inclination of an observer's head can be prevented. Also, by providing the blind 2, an external light from other part than the display is cut off, and brightness of an image is improved relatively.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to polarized glasses used in a three-dimensional image reproduction device that utilizes the principle of binocular parallax.

BACKGROUND OF THE INVENTION In recent years, there has been a demand for images reproduced by television sets to be even more powerful and realistic. In order to give a three-dimensional effect to the reproduced II image, the principle of binocular parallax is used to alternately reproduce left eye information and right eye information, so that the left eye information is transmitted only to the left eye, and the right eye information is reproduced alternately. A method is being considered in which a three-dimensional effect is obtained by transmitting eye information only to the right eye.

Hereinafter, one embodiment of a conventional stereoscopic image reproduction device will be described with reference to the drawings.

FIG. 4 is a principle diagram of an embodiment of a conventional stereoscopic image reproduction device.
FIG. 5 is a block diagram of the stereoscopic image reproducing apparatus, and FIG. 6 shows the relationship between the content of the stereoscopic image video signal, the switching signal, and the polarization axis of the polarizing filter. 11 in Figure 4
12 is a projection type CRT, 12 is a projection lens, 13 is a polarizing filter, and 14 is a projection screen. The three-dimensional image reproducing device described here electrically or mechanically switches the direction of the polarization axis in response to a switching signal in front of the projection lens 12, and observes the image using polarized glasses with the left and right polarization axes orthogonal to each other. It is.

Now, let us consider a case where a video signal having the content as shown in FIG. 6 is applied to the video signal input terminal 15 of FIG. 5, and the reproduced image is displayed on the projection type CRT 2 of FIG. In this video signal, left eye information and right limit information are alternately switched for each field. The left eye information and right eye information are images taken with cameras that correspond to the left eye and right eye, respectively, and in this reproduced image, the left eye information is entered only for the left eye, and the right eye information is entered only for the right eye. For example, it is possible to display a reproduced image with a three-dimensional effect using binocular parallax.

To this end, the injection of information into the left eye and the right eye is switched using a polarizing filter 13 whose polarization axis can be switched, and a polarizing eye [17 whose left and right polarization axes are directly illuminated.

The switching signal generating circuit 16 in FIG. 5 generates the switching signal shown in FIG. 6 in response to the video signal content shown in FIG. 6, and the polarizing filter 13 in FIG. Assume that the direction of the polarization axis is switched as shown in the figure. That is, an image based on left eye information and an image based on right eye information are alternately displayed on the screen 14 using polarized light having orthogonal polarization axes.
It will be projected upwards. By observing this image with polarized glasses 17 having orthogonal polarization axes as shown in FIG. 6, left eye information is independently injected into only the left eye, and right eye information is injected into only the right eye, resulting in a stereoscopic effect. get.

FIG. 3 schematically shows the shape of polarized glasses conventionally used in the stereoscopic image reproducing apparatus. The polarized glasses have a shape in which a polarizing plate 21 is fitted into the lens part of ordinary glasses. Here, 22 is the glasses Q frame, 23 is the screen, 2
4 indicates the eyeball.

Problems to be Solved by the Invention However, when conventionally used polarized glasses are used, a) the viewer tends to tilt his/her head when viewing, and at this time, the polarization axis of the polarizing filter and The polarization axis of polarized glasses is misaligned, and the left eye information and right eye information are not properly separated, making it impossible to reproduce good stereoscopic images. (mouth) Images are viewed through a polarizing filter, resulting in dark images. There were two problems.

In view of the above problems, the present invention suppresses the tilt of the viewer's head,
The present invention also provides polarized glasses that obtain relative brightness of images by blocking external light.

Means for Solving the Problems In order to achieve this object, the polarized glasses of the present invention have an aperture (polarizing plate) of the polarized glasses with an appropriate viewing distance of # (7 for NTSC).
Based on the viewing angle when looking at the display from H or 3H for high-definition televisions, the display can be seen at the same size as the aperture (nothing other than the display screen can be seen). It is constructed by using an opaque plate that covers the entire field of view in the frame area.

Effect: This configuration guides the viewer's unconscious movement of aligning the aperture of the polarized glasses with the display screen, thereby suppressing the tilt of the head. Furthermore, the brightness of the image is made relatively bright by preventing light from entering from other than the opening.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram of an embodiment of the present invention, FIG. 2 is a diagram for explaining the method of determining the opening shown in FIG. 1, and FIG. 3 is a diagram for comparison with the embodiment of the present invention. It is a figure of a conventional example. 1st
In the figure, 1 is an opening using a polarizing plate, 2 is a blind provided around the opening to block external light, and 3 is a temple for wearing on the ear. The size of the Sekiguchi part (polarizing plate) 1 shown in FIG. 1 is determined according to the concept shown in FIG. That is, when wearing the polarized glasses and viewing the screen 23 from a suitable viewing distance, the size of the aperture (polarizing plate) l is determined so that the screen 23 can be seen from all sides.

The blind 2 shall cover the entire visual field except the screen.

By determining the size of the aperture (polarizing plate) l in FIG. prevent tilting. Further, by providing the blind 2, external light from sources other than the display is blocked, and the brightness of the image is relatively improved.

Effects of the Invention As described above, according to the present invention, it is possible to eliminate the influence caused by the tilt of the viewer's head, suppress a decrease in relative brightness due to external light, and obtain a bright image with good stereoscopic effect. is possible,
Its practical effects are extremely large.

[Brief explanation of drawings]

Fig. 1 is a schematic perspective view of polarized glasses for viewing stereoscopic images according to an embodiment of the present invention, Fig. 2 is a diagram for explaining the method of determining the aperture in the present invention, and Fig. 3 is a conventional example of polarized glasses. 4 is a principle diagram of an embodiment of a conventional stereoscopic image reproducing device, FIG. 5 is a block diagram of the stereoscopic image reproducing device, and FIG. 6 is a diagram showing the contents of a stereoscopic image video signal. FIG. 3 is a diagram showing the relationship between a switching signal and a polarization axis of a polarization filter. I...Aperture (polarizing plate), 2...Blind.

Claims (1)

[Claims] It has an opening using a polarizing plate of a size corresponding to the viewing angle at which the display of the stereoscopic image display device is viewed from an appropriate viewing distance, and an opaque material is used in the area other than the opening to block unnecessary external light. Polarized glasses for stereoscopic image monitoring.