JPH0876059A - Stereoscopic video display device - Google Patents

Abstract

PURPOSE: To provide a stereoscopic video display device which is simply constituted so that a stereoscopic video can be displayed by using a normal monitor display device. CONSTITUTION: The stereoscopic video display device is constituted of a monitor display device 1 whose display surface is constituted of a first display area 2a and a second display area 2b, and where a video for left eye is displayed on the first area 2a and a video for right eye is displayed on the second area 2b, a polarizing plate 3 which is arranged in front of the display surface of the display device 1 and whose axis of polarization is mutually different in front of the first area 2a and the second area 2b, a roof-like prism plate 4 compositing and emitting the light 6L of the video for left eye and the light 6R of the video for right eye passing through the plate 3, and polarizing spectacles 5 provided with a first polarizing window 5a through which the light 6L of the video for left eye out of the light synthesized by the plate 4 passes and a second polarizing window 5b through which the light 6R of the video for right eye passes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereoscopic image display device capable of displaying a stereoscopic image on an ordinary monitor display device such as a CRT.

[0002]

2. Description of the Related Art Conventionally, when a stereoscopic image is displayed, a pixel forming a left-eye image and a pixel forming a right-eye image are alternately displayed in a horizontal direction on a liquid crystal display device or the like. By separating the light from the left and right with a lenticular lens, parallax barrier, etc., you can display a stereoscopic image,
Alternatively, a left-eye image and a right-eye image are alternately displayed on the display device temporally, and the observer wears liquid crystal shutter glasses that open and close the left and right viewing windows in synchronization with the alternate display. This allows the observer to recognize a stereoscopic image.

However, in the former case, in order to accurately separate the light from the left and right pixels into the right and left, it is necessary to precisely arrange the lenticular lens and the parallax barrier in front of the display screen, and in the CRT. It is difficult to accurately display the left and right pixels alternately in the horizontal direction.

In the latter case, a circuit structure for alternately displaying a left-eye image and a right-eye image is required, and liquid crystal shutter glasses for opening and closing in synchronization with left and right images are also required. Required and costly.

As a solution to the above-mentioned problems, for example, in Japanese Patent Laid-Open No. 6-62435, an image for the left eye and an image for the right eye are divided and displayed on a normal monitor display device, and A display device is shown in which an observer displays a stereoscopic image by observing the divided image through a stereoscopic mirror. The stereoscopic mirror optically compresses left and right images to the left and right so that an observer can easily recognize a stereoscopic image, and the left and right images are incident on the left and right eyes of the observer from the same direction. It is for

However, even in the method of this publication, it is possible to display a stereoscopic image by using an ordinary monitor display device, but the stereoscopic image can be observed only through a stereoscopic mirror, and at the same time, the stereoscopic image can be observed. There is a problem that the number of people who can recognize video is small. Even if a plurality of stereoscopic mirrors are provided, since the left and right images are displayed separately, the positions where the left and right images are incident on the left and right eyes of the observer from the same direction are limited, and a large number of them are simultaneously displayed. It is practically difficult for other people to observe stereoscopic images.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the drawbacks of the above-mentioned conventional example, and a stereoscopic image can be easily displayed by using a monitor display device such as a CRT which is normally used. It is an object of the present invention to provide a video display device.

A further object of the present invention is to provide a stereoscopic image display device in which a stereoscopic image can be viewed in a wide range and many people can simultaneously observe the stereoscopic image.

[0009]

In the stereoscopic image display device of the present invention, the display surface is composed of a first display area and a second display area, and the first display area is for the left eye and the right. A monitor display device in which one of the images for the eye is displayed and the other image is displayed in the second display area, and the monitor display device is arranged in front of the display surface of the monitor display device, A polarizing plate having polarization axes different from each other in front of the display region and in front of the second display region, and a first light that has passed through the polarizing plate and is combined and emitted. Polarizing means, and a second polarizing window that allows the light of one image of the lights combined by the first optical means to pass therethrough, and a second polarizing window that allows the light of the other image to pass therethrough. It consists of and.

Further, the stereoscopic image display device of the present invention is characterized in that the polarizing plate and the first optical means are integrated with each other, and the adapter is detachably attached to the monitor display device.

The stereoscopic image display device of the present invention includes a horizontal compression circuit for horizontally compressing the original left and right image information in the horizontal direction and outputting the image information to the monitor display device. Second optical means for horizontally expanding the light of the left and right images emitted from the second display area and emitting the light is provided.

Further, the three-dimensional image display device of the present invention is characterized in that the polarizing plate, the first optical means and the second optical means are integrated with each other, and the adapter is detachably attached to the monitor display device. And

The stereoscopic image display apparatus of the present invention is characterized in that the second optical means is a Fresnel lens plate.

Further, in the stereoscopic image display device of the present invention, the first optical means is an optical element in which a large number of right-angle prisms extending vertically in stripes are arranged in the horizontal direction to form a surface on the light output side. It is characterized by

Further, the stereoscopic image display device of the present invention is characterized in that the monitor display device is a CRT.

[0016]

According to the above construction, it is only necessary to separately display the left-eye image and the right-eye image on the display device side.
Further, since the light of the image for the left eye and the light of the image for the right eye are combined by the first optical means, the light of the left and right images is incident on the left and right eyes of the observer from the same direction. The position where stereoscopic images can be recognized becomes wider.

Further, the horizontal compression circuit horizontally compresses and displays the left and right images in the first and second display areas of the monitor display device, and the light of the displayed left and right images is adjusted by the second optical means. By diverging and emitting the image, the observer can recognize a stereoscopic image having the same aspect ratio as the original image and a large screen size.

Further, by integrating the polarizing plate and the first optical means or the polarizing plate and the first and second optical means into an adapter, a stereoscopic image is displayed when the adapter is attached,
It becomes possible to display a flat image when the adapter is removed.

Further, by constructing the first optical means by an optical element whose light-exiting surface is formed by a large number of right-angle prisms, the left eye image light and the right eye image displayed on the monitor display device are formed. It is possible to emit the image light for use in a state of being almost completely combined.

Further, by configuring the second optical means by the Fresnel lens plate, it is possible to spread the image light for the left eye and the image light for the right eye in the horizontal direction substantially evenly.

Further, by using a CRT as the monitor display device, it becomes possible to configure the monitor display device by an ordinary television monitor or personal computer monitor.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a diagram showing a schematic configuration of a stereoscopic image display device of this embodiment.

In the figure, reference numeral 1 denotes a monitor display device constituted by a normal cathode ray tube (CRT), and a left-eye image is displayed in a first display area 2a on the left half of the display surface of the display device 1. Is displayed, and the second display area 2b on the right half is displayed.
The image for the right eye is displayed on. The left-eye image and the right-eye image have a binocular parallax that allows an observer to recognize a stereoscopic image.

A polarizing plate 3 is arranged in front of the display surface of the monitor display device 1. The polarizing plate 3 includes a first polarizing portion 3a located in front of the first display area 2a and a second polarizing portion 3a.
And a second polarizing portion 3b located in front of the display area 2b. The polarization axis of the first polarizing unit 3a and the polarization axis of the second polarizing plate 3b are orthogonal to each other.

A roof prism plate 4 is arranged in front of the polarizing plate 3. The surface (a surface on the light incident side) 4a of the roof-type prism plate 4 on the polarizing plate 3 side is a flat surface.
The surface on the opposite side (surface on the light output side) 4b is formed by arranging a large number of right-angle prisms extending in stripes in the vertical direction in the horizontal direction at a minute pitch.

In the figure, reference numeral 5 denotes polarizing glasses worn by an observer, which is a viewing window on the left side of the polarizing glasses 1.
The polarization axis of the polarization window 5a of the first polarization unit 3 of the polarization plate 3 is
the second direction, which is in the same direction as the polarization axis of a and is the peep part on the right side
The polarization axis of the polarization window 5b of the second polarization part 3 of the polarization plate 3 is
It has the same direction as the polarization axis of b.

FIG. 2 is a diagram showing a principle of observing a stereoscopic image by an observer in the stereoscopic image display apparatus of this embodiment.

The light 6L for the left-eye image emitted from the first display area 2a of the monitor display device 1 passes through only the first polarization direction (for example, P wave) by the first polarization section 3a of the polarizing plate 3. Then, the light enters the roof prism plate 4. On the other hand, the light 6R of the image for the right eye emitted from the second display area 2b of the monitor display device 1 passes through only the second polarization direction (for example, S wave) by the second polarization section 3b of the polarizing plate 3. , Is incident on the roof prism plate 4.

The left and right image lights 6L and 6R incident on the roof-type prism plate 4 are combined in the roof-type prism plate 4 and then are refracted by the exit-side surface 4b so that the monitor display device 1 can be operated. In a direction orthogonal to the display surface of.

An observer observes the display surface of the monitor display device 1 from the front side through the roof prism plate 4 while wearing the polarizing glasses 5. At this time, the only light that passes through the first polarization window 5a of the polarization glasses 5 and enters the left eye 7L of the observer is the image light 6L for the left eye that has passed through the first polarization unit 3a. , The image light 6R for the right eye is the first polarization window 5a.
Is blocked by. Further, the light that passes through the second polarization window 5b of the polarization glasses 5 and enters the right eye 7R of the observer is the image light 6R for the right eye that passes through the second polarization window 3b, and is left. The image light 6L for the eye is blocked by the second polarization window 5b.

Therefore, the observer recognizes only the image for the left eye projected on the monitor display device 1 with the left eye 7L, and only the image for the right eye projected on the monitor display device 1 with the right eye 7R. To do. Then, at this time, the light 6 of the image for the left eye
L and the image light 6R for the right eye are combined by the roof prism plate 4, and the left and right eyes 6L, 6 of the observer are seen from the same direction.
Since the light enters R, the observer can recognize the stereoscopic image well.

FIG. 3 is a block diagram showing a transmission configuration of video information to the monitor display device 1 in the stereoscopic video display device of this embodiment.

In the figure, 8L is a video information source for the left eye, 8R is a video information source for the right eye, and the left and right video information sources 8L,
Both 8R are composed of a laser disk device, a VTR and the like. Reference numeral 9 is a synchronization controller for synchronizing the operations of the left and right video information sources 8L and 8R, and 10 is a video synthesizing circuit for synthesizing the left and right video signals output from the left and right video information sources 8L and 8R.

The left and right video signals output from the video information sources 8L and 8R are displayed on the left half of the display screen by the video synthesizing circuit 10 and the right eye video is displayed on the display screen. The signal is processed as shown in the right half,
It is supplied to the monitor display device 1.

As a result, as described above, the image for the left eye supplied from the image information source 8L is displayed in the first display area 1a on the display surface of the monitor display device 1, and the second display area 1b is displayed. The image for the right eye supplied from the image information source 8R is displayed on.

In the stereoscopic image display device of this embodiment as described above, the left eye image and the right eye image are separately displayed on the left and right of the display surface of the ordinary monitor display device 1 such as a CRT. ,
By arranging the polarizing plate 3 and the roof prism plate 4 in front of the display surface, an observer can observe a stereoscopic image only by wearing the polarizing glasses 5. At this time, the polarizing plate 3 and the roof-type prism plate 4 need not be precisely arranged in the unit of pixel pitch unlike the conventional lenticular lens or parallax barrier, and can be simply arranged. Therefore, it is possible to easily configure an adapter in which the polarizing plate 3 and the roof prism plate 4 are integrated and attach the adapter to the display surface of the monitor display device 1 when an observer observes a stereoscopic image. Is.

Further, the image light 6L for the left eye and the image light 6R for the right eye are emitted in the same direction while being combined by the roof prism plate 4, so that the observer can see the monitor display device 1 If it is located in front of the display surface, the image light 6L for the left eye and the image light 6R for the right eye are always incident on the left and right eyes of the observer from the same direction. Therefore, the observer can easily recognize the stereoscopic image, and the observable position of the stereoscopic image is widened. In addition, many people can observe stereoscopic images at the same time.

FIG. 4 is a diagram showing the outline of the overall configuration of a stereoscopic image display device of another embodiment.

In the figure, reference numeral 11 denotes a horizontal compression circuit for compressing each video signal output from the video information sources 8L and 8R in the horizontal direction to halve each video signal. That is, when the image information having the aspect ratio of 3: 4 in the vertical and horizontal directions is output from the image information sources 8L and 8R, the horizontal compression circuit 11 horizontally adjusts the aspect ratio of each image information to 3: 2. Is compressed to.

Reference numeral 12 is a Fresnel lens plate that doubles the light that has entered through the polarizing plate 3 from the display surface of the monitor display device 1 in the horizontal direction and emits it. The Fresnel lens plate 12 keeps the incident light in the vertical direction.

In the case of another embodiment, the monitor display device 1
In the first display area 2a and the second display area 2b on the display surface of the above, the original video information recorded in the video information sources 8L and 8R, respectively, is compressed to 1/2 in the horizontal direction. Although a vertically long image is displayed, the first and second display areas 2a,
The light of the image projected on 2b is the Fresnel lens plate 12
The image is recognizable by the observer as it is the same as the original image recorded in the image information sources 8L and 8R. It becomes the aspect ratio.

As described above, in the stereoscopic image display device of the other embodiment, in addition to the effects of the above-described embodiment, the left and right images are displayed on the monitor display device 1 in the first and second display areas 2a and 2b. At the time of displaying, since each image is horizontally compressed to 1/2 and displayed, the image is displayed according to the shapes of the first and second display areas 1a and 1b, and the display of the monitor display device 1 is performed. Since the entire area of the surface can be effectively used and the light of the displayed image is doubled in the horizontal direction by the Fresnel lens plate 12, the observer can see the image information sources 8L and 8L.
It is possible to recognize a stereoscopic image having the correct aspect ratio, which is equal to the original image recorded in R. In other embodiments, the polarizing plate 3, the roof prism plate 4 and the Fresnel lens plate 12 may be integrated to form an adapter.

Further, in the above-described embodiment, the image for the left eye is displayed in the first display area 2a of the monitor display device 1 and the second display image is displayed.
The image for the right eye is displayed in the display area 2b of the above, but conversely, the image for the right eye is displayed in the first display area 2a and the image for the left eye is displayed in the second display area 2b. May be displayed. In this case, the polarization directions of the polarization windows 5a and 5b of the polarization glasses 5 may be reversed with respect to the above embodiment.

Further, in the above embodiment, the original left and right video information is obtained from the video information sources 8L and 8R, but the two-dimensional video signal sent by normal television broadcasting is
It may be converted into a three-dimensional video signal by field delay or the like.

[0046]

According to the present invention, it is possible to provide a stereoscopic image display device capable of displaying a stereoscopic image on a normal monitor display device with a simple structure.

Further, according to the present invention, the position where the stereoscopic image can be recognized well is widened, and at the same time, a stereoscopic image display device can be provided in which many people can observe the stereoscopic image.

Further, according to the present invention, it is possible to provide a stereoscopic image display device having a large screen size without changing the aspect ratio of the original image.

Further, according to the present invention, by removing the adapter, it is possible to provide a stereoscopic image display device in which the monitor display device can function as a normal flat image display device.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of a main part of a stereoscopic image display device of the present invention.

FIG. 2 is a diagram showing a light passing state of an image in the stereoscopic image display device of the present invention.

FIG. 3 is a front view showing the outline of the overall configuration of a stereoscopic image display device of the present invention.

FIG. 4 is a diagram showing an outline of an overall configuration of a stereoscopic image display device according to another embodiment of the present invention.

[Description of sign]

 1 Monitor Display Device 2a First Display Area 2b Second Display Area 3 Polarizing Plate 3a First Polarizing Section 3b Second Polarizing Section 4 Roof-type Prism Plate (First Optical Means) 5 Polarizing Glasses 5a First Polarization window 5b Second polarization window 6L Image light for left eye 6R Image light for right eye 11 Horizontal compression circuit 12 Fresnel lens plate (second optical means)

Claims (7)

[Claims] 1. A display surface is composed of a first display area and a second display area, and one of the left-eye and right-eye images is displayed in the first display area. A monitor display device for displaying the other image in the second display area, and a monitor display device arranged in front of the display surface of the monitor display device.
A front side of the display area and a front side of the second display area having different polarization axes from each other, and the light of one image and the light of the other image that have passed through the polarizing plate are combined and emitted. Polarized light having one optical means, a first polarization window that allows one image light of the light combined by the first optical means to pass therethrough, and a second polarization window that allows the other image light to pass therethrough. A stereoscopic image display device comprising: glasses. 2. The three-dimensional image display device according to claim 1, wherein the polarizing plate and the first optical means are integrated with each other to form an adapter detachably attached to the monitor display device. 3. A horizontal compression circuit for compressing the original left and right video information in the horizontal direction and outputting the image information to the monitor display device, and the first and second display areas of the monitor display device. The second optical means for spreading the light of the left and right images in the horizontal direction and emitting the light is provided.
The stereoscopic image display device described. 4. The stereoscopic image according to claim 3, wherein the polarizing plate, the first optical means, and the second optical means are integrated with each other to form a detachable adapter for the monitor display device. Display device. 5. The stereoscopic image display device according to claim 3, wherein the second optical means is a Fresnel lens plate. 6. The optical element according to claim 1, wherein the first optical means is an optical element in which a large number of right-angle prisms extending vertically in stripes are arranged in the horizontal direction to form a surface on the light output side. The three-dimensional image display device described in 2, 3, 4 or 5. 7. The stereoscopic image display device according to claim 1, wherein the monitor display device is a CRT.