JPH07302063A - Display device - Google Patents

Abstract

PURPOSE:To make video display without impairing the original resolution as far as possible by controlling the positions of dividedly displayed images in such a manner that the divided images are displayed side by side as if these images are partly superposed on or connected to each other in a horizontal direction. CONSTITUTION:The distance L from the centers of both eyes of liquid crystal displays 103, 106 paired on the right and the left is variable. Positions of magnifying lenses 104, 106 are so arranged as to be movable cooperatively with the positions of the respective liquid crystal displays 103, 106. Image processing is executed in the cerebrum center in such a manner that the human eyes attempt to capture the screens of two magnified virtual images 107, 108 not as one screen any more but as the two screens if these screens are entirely different from each other in the case the virtual images are so set as to overlap on each other or to come into contact with each other by increasing the distance L from the centers of both eyes of the liquid crystal displays 103, 106 paired on the right and the left. Finally, these two screens are visible as if the screens are connected at the center of the screens.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a display device, and more specifically,
Display screens such as display screens with a screen aspect ratio (aspect ratio) of 3: 4, such as those of current television receivers, and display screens with an aspect ratio of 9:16, such as HDTVs, which are expected to become popular in the future. The present invention relates to a display device capable of displaying display images having different aspect ratios on the same display device.

[0002]

2. Description of the Related Art Recently, a wide screen display type display device typified by a high-definition television has been attracting attention as a display device capable of obtaining a high quality and realistic image.

The aspect ratio of the display screen is determined by the standard of the video signal to be displayed on it (NTSC in Japan and the US, PAL in Europe, HDTV, etc.) (NTSC is 3:
4, 9:16 for high definition). Among them, a high-definition receiver is expensive at present, and has not yet become popular. Therefore, if you try to view high definition video on the current 3: 4 aspect ratio receiver,
It was necessary to convert the signal with an optional down converter. This down converter thins out the original high-definition signal so that it can be received by the current television receiver. For example, in the MUSE method which is a typical method of a down converter, the resolution is reduced to 1/2 of the original signal in a still image and 1/8 in a moving image.

On the other hand, in recent years, a display device using a liquid crystal panel has been actively developed. The liquid crystal panel has advantages such as thinness, light weight, and low power consumption compared to conventional CRT display devices, and is applied to monitors for OA equipment, portable TVs, and projection TVs that can display large screens. Has been attracting particular attention. In addition, recently, research and development of a goggle type display device that allows artificially seeing one stereoscopic image by using two liquid crystal panels to show different images to the left and right eyes has been actively conducted.

[0005]

However, in most of these, the aspect ratio of the display screen is 3: 4 of the current TV, and a high-definition liquid crystal panel has been developed. Difficult, expensive, not practical. That is, under the present circumstances, it is not possible to easily obtain a display device capable of wide-screen display with high image quality and a high sense of reality like high-definition video.

It is an object of the present invention to provide a display device which uses the technology of the existing display device and can change the aspect ratio of the display screen.

Further, for example, in the case of displaying a high-definition video signal, it is an object of the present invention to provide a display device capable of displaying a video without degrading the original resolution as much as possible.

[0008]

According to the present invention for achieving the above object, the first display means, the second display means and the image signal are divided so as to divide the image in the horizontal direction, and the first display means is provided. Display means and transfer means for sending to the second display means, and the divided images displayed by the first and second display means are displayed side by side so as to partially overlap or connect in the horizontal direction. And a control means for controlling the position of the divided display image.

Further, according to the present invention, the first display means, the second display means, the first transfer means for sending the same image signal to the first and second display means, and the image in the horizontal direction. A second transfer unit that divides the image signal so as to divide the image signal and sends the image signal to the first and second display units, respectively, and the first and second units when the same image is sent by the first transfer unit. The position of the display image is controlled so that the respective images displayed by the display means of FIG. 3 are entirely overlapped, and when the divided images are sent by the second transfer means, each of the images displayed by the first and second display means is displayed. And a control unit that controls the position of the divided display images so that the divided images are displayed side by side so as to partially overlap or connect in the horizontal direction.

The principle of the present invention will be described below.

A case where the present invention is applied to a goggle type television using a liquid crystal display will be described (in addition to the liquid crystal display, other displays such as CRT and EL can be used).

First, in order to facilitate understanding of the present invention, a conventional image display using a goggle type television will be described. As shown in FIG. 4, the goggle type television has a display means 1 for the right eye (first display means) and a display means 2 for the left eye.
(Second display means), the display means 1 is the right eye 1
01 includes a magnifying lens 104 for the right eye and a liquid crystal display 103 for the right eye, which are arranged in front of 01.
02, a left-eye magnifying lens 106 and a left-eye liquid crystal display 105. The image displayed on the liquid crystal display 103 for the right eye is the magnifying lens 10 for the right eye.
Although the image enters the right eye 101 via 4, the image is magnified by the magnifying lens 104 for the right eye, and a virtual image is generated at a position away from the right eye 101 by a distance D. Similarly, with respect to the image displayed on the liquid crystal display 105 for the left eye, a virtual image also occurs at a position separated from the left eye 102 by a certain distance D.

By the way, the left and right eyes of human beings are separated by a day (average of Japanese people is 62 mm). It is known that the interocular distance plays a very important role in obtaining position information of an object. When a human gazes at an object located at a distance D from the eye, the focus of the eye is adjusted to the distance D, and the binocular span is adjusted so that the optical axes of both eyes are directed to the object. The image obtained from both eyes is fusion-processed in the cerebral center without the burden on the eyes by the cooperation of the focus adjustment and the binocular constriction.

Conventionally, when an image is displayed on a goggle type television, as shown in FIG. 4, the centers of both eyes are aligned so that the enlarged virtual images on the left and right coincide with each other at a distance of D from both eyes. And the distance L between each liquid crystal display and the magnifying lens (here, set to L ₃ ) is set, and when looking at the center of the screen of the liquid crystal display, the left and right eyes are only D from the eyes. Focusing is performed on a distant enlarged virtual image, and the image is converging at a converging angle θ. By arranging the left and right liquid crystal displays and the left and right magnifying lenses in this way, fusion processing is performed without straining the eyes because focus adjustment and binocular constriction are reasonably linked. It looks like a large screen is placed at a distance of D from. This is the principle of the so-called goggle type television that has been conventionally performed. Now, suppose that, for example, a disk as shown in FIG. 5 is taken as an object from the right side and the left side, and respective image signals are sent to the liquid crystal displays 103 and 105 of the display means 1 and 2 of the goggle type television shown in FIG. 4 for display. , The virtual images respectively generated are fused and a stereoscopic image is visible.

Consider the case where the left and right magnified virtual images at a distance D from the eyes do not match in the goggle type television set. Here, consider a case where the optical axis of the lens is made to converge as shown in FIG. At this time, in the center of the screen, the focus adjustment, the convergence angle, and the distance D
However, it can be seen that the left and right images are misaligned at both ends of the screen. In this state, when trying to view the screens of the two liquid crystal displays as one screen as described above, a double image may appear.

Next, the principle of the present invention will be described.

The present inventors have made further studies on how the human eye captures the above two magnified virtual images, and have reached the present invention described below.

From the state in which the left and right magnified virtual images match as shown in FIG. 4, the distance between the center of both eyes and each liquid crystal display and the magnifying lens is increased as shown in FIG. 1 (distance L ₁ >
When the respective magnified virtual images are shifted in the left-right direction by a distance L ₃ ), there occurs a portion where the virtual images formed by the display means 1 and the display means 2 do not overlap each other, and the center of both eyes and each liquid crystal display and magnifying lens are As the distance increases,
As shown in, virtual images created by the display means 1 and the display means 2 come into contact with each other side by side (distance L ₂ > distance L
₁ ).

In FIG. 1, at the centers of the two magnified virtual images, both focus adjustment and width convergence angle match the distance D to the eye, so there is no problem. On the other hand, there is only one of the left and right magnified virtual images at both ends of the screen.

In the case of FIGS. 1 and 2, as described above, the screens displayed on the two enlarged virtual images are exactly the same (see FIG. 5).
(Including those taken from different angles), the human eye manages to capture these two screens as if they were a single screen, and as a result, the eyes are overloaded and binocular rivalry occurs. Occurs.

However, the inventor of the present invention has found that if these two magnified virtual image screens are completely different, the human eye will try to see them as two screens instead of one, and Fusion processing is performed in
Finally, I found that the two screens seemed to be connected at the center of the screen.

Therefore, for example, a disk as shown in FIG. 3A is photographed as a subject, and the liquid crystal display 103 of the display means 1, 2 of the goggle type television as shown in FIG.
If image signals obtained by dividing a disc image as shown in FIG. 3B are sent to 105 for display, virtual images respectively generated are connected and a disc image as shown in FIG. 3C can be seen. In addition, when the virtual images are overlapped as shown in FIG. 1, they are overlapped so that the overlapped portions become the same image,
Moreover, if the brightness of the overlapping portion is set so as not to differ from the brightness of the non-overlapping portion, a virtual image appears to be connected similarly.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention based on the above principle will be described below in detail with reference to the drawings based on the embodiments. (First Embodiment) The construction of this embodiment is the same as that of the goggle type television shown in FIGS. 1 and 2, but the distance L from the center of both eyes of the liquid crystal displays in the left and right pair is variable. Has become. Also, the position of the magnifying lens can be moved in association with the position of each liquid crystal display.
In this embodiment, in addition to a liquid crystal display, a CRT, an E
Of course, other displays such as L can also be used.

The distance between the liquid crystal displays 103 and 105 and the magnifying lenses 104 and 106 is U, and the magnifying lens 1
04, 106 and the distance between the eyes 101, 102 are T, virtual image 1
The distance between 07 and 108 and the magnifying lenses 104 and 106 is D
'And the focal lengths of the left and right magnifying lenses 104 and 106 are both F, the following relationship is established between D', U, T, and F from the lens formula.

1 / F = -1 / (D'-T) + 1 / U The liquid crystal panel used in this embodiment has 600 horizontal pixels, 500 vertical pixels, and an aspect ratio of 4: 3. is there.

In the display device having such a configuration, the degree of overlap of virtual images can be adjusted by arbitrarily adjusting the distance L from the center of both eyes of the liquid crystal display, and the virtual images are displayed based on the above-described principle of the present invention. It is possible to connect and obtain a screen with an arbitrary aspect ratio. Further, within the movable range, as shown in FIG. 1 or FIG. 2, it is also possible to display the divided images on the display means 1 and 2 and display the virtual images in a combined manner, as shown in FIG. Can be adjusted to display the same image on the display means 1 and 2 and display the virtual image in a fused state.

The operation of the display device having the above structure will be described below. First, when the positions of the respective liquid crystal displays and the magnifying lenses are set so that the left and right magnified virtual images coincide with each other at an image plane as shown in FIG. When looking at the center, the left and right eyes focus on an enlarged virtual image that is away from the eye by D, and are converging at a converging angle θ. By arranging the left and right liquid crystal displays and the left and right magnifying lenses in this way, fusion processing is performed without straining the eyes because focus adjustment and binocular constriction are reasonably linked. It looks like a large screen is placed at a distance of D from. At this time, the image screen seen by the human eye has 600 horizontal pixels, 500 vertical pixels, and an aspect ratio of 4: 3.

On the other hand, as shown in FIG. 1 or 2, when the distances from the centers of both eyes of the liquid crystal displays which are paired left and right are set to be large so that the virtual images overlap with each other or the virtual images are in contact with each other, as described above. In addition, if the screens transferred to the two magnified virtual images are exactly the same, the human eye somehow tries to think of these two screens as if they were one screen, and as a result the eyes are burdened and Cause a struggle. However, if the two magnified virtual image screens are completely different, the human eye tries to see them as two screens instead of one, and fusion processing is performed in the cerebral center. And finally,
The two screens appear to be connected at the center of the screen.

As a result, the human eye can see the screen as if the aspect ratio of the screen had changed. For example, when the positions are adjusted so that the two magnified virtual images do not overlap at all as shown in FIG. 2, the two screens appear to be connected to each other, resulting in a wide-screen display of 8: 3. Further, by adjusting the overlapping width of the two magnified virtual images, for example, it is possible to display a wide screen with an aspect ratio of 16: 9 of a high-definition television. Further, in this case, the horizontal resolution of the screen actually seen by the human eye is twice as high as that of the simply used liquid crystal panel, and the vertical resolution thereof is that of the used liquid crystal panel. For example, the liquid crystal panel used is an NTSC specification and has 600 horizontal pixels and 500 vertical pixels.
When a wide screen display of 6: 9 is performed, it is equivalent to watching an image corresponding to 600,000 pixels (horizontal pixel number 1200 × vertical pixel number 500). With this resolution, the vertical resolution is about half (1125 lines for high-definition) compared to the standard for high-definition video, but about 40M in the horizontal direction.
With a resolution of Hz, you can enjoy images with sufficiently high resolution compared to MUSE format images (about 20 MHz in the horizontal direction).

Here, the configuration of the goggle type television actually used will be described with reference to FIG. 1 and 2
The liquid crystal display 103 for the right eye and the magnifying lens 104 for the right eye, and the liquid crystal display 105 for the left eye and the magnifying lens for the left eye 106 shown in FIG. Has a horizontal pixel count of 600, a vertical pixel count of 500, and a screen aspect ratio of 4: 3). A driver unit for moving both the display units of the display accommodating section 301 together is accommodated in the accommodating section 302 and can be set at a desired interval by the volume 303 attached to the frame section 304, so that a screen having a desired aspect ratio can be enjoyed. be able to.

In such a goggle type television, the high-definition video signal is divided into two in the horizontal direction from the outside and transferred to the left and right liquid crystal displays respectively, and the volume of the left and right display units is adjusted by the volume 303 to adjust the virtual image of FIG. I was able to see an image with an aspect ratio of 16: 9. The number of scanning lines is only about half of the high-definition signal standard (1125 lines). In contrast, by transferring the odd field signal and the even field signal of the interlaced signal to the same scanning line, flicker can be reduced. It was found that a high resolution, sufficient image could be obtained.

Next, a signal processing circuit (transfer means) for dividing the video signal in the horizontal direction and transferring the divided video signal to each display means will be described.

FIG. 7 is a diagram showing the configuration of the signal processing circuit used in the present invention. This is because, in many cases, the signal scanning lines of the high-definition video signals that are adjacent to each other are almost the same, so that a wide display of one NTSC aspect ratio 16: 9 from two adjacent high-definition signals is used. A device that forms a signal.

The high-definition video signal 501 undergoes processing such as amplification in the video signal processing circuit 503, and enters the left and right display devices 507 and 508 through the black signal 502 and video signal 513 changeover switches 506 and 510. On the other hand, the sync signal is separated from the video signal 501 by the sync separation circuit 504, and enters the timing signal generation circuit 505, from which the switch control signals 509, 5 for switching the video signal and the black signal.
14 and the control signals 511 and 512 of the left and right display devices are output.

Hereinafter, the display device has an aspect ratio of 4: 3.
A liquid crystal display having 600 and 500 horizontal and vertical pixels is used. When the two displays are arranged side by side, the aspect ratio is 8: 3. In order to display a wide screen having an aspect ratio of 16: 9, as shown in FIG. 9, the video signal of the front half of one horizontal scanning period is displayed on the right 2/3 area of the left eye display in the next horizontal direction. The video signal of the rear half of the scanning period is set to the left side 2/3 of the display for the right eye.
Is displayed in the area. In order to prevent the boundary between the left and right images from appearing discontinuous, it is preferable that the left and right images overlap with each other at the boundary, and the left and right images are wider than ⅔ of each width. Although it is desirable to display them, the case where there is no overlap will be considered in the following description.

In FIG. 8, the (2j) th row and the (2j + 1) th row of the high-definition video signal (a) correspond to the jth row of the left-eye display and the jth row of the right-eye display, respectively. When the effective horizontal scanning period of the high-definition signal is t _He , the sampling of the video signal for the left eye starts 1/3 t _He before the effective scanning starts. During this 1/3 t _He period, the switch 5 in FIG.
A black signal is input according to 06. During the remaining period of 2/3 t _He , the switch 506 is inverted to input the video signal. In addition, sampling of the video signal for the right eye starts near the middle of the effective scanning period of the high-definition signal, and is initially 2 / 3t _He.
The video signal is input by the switch 510 during the period of, and the black signal is input by inverting the switch 510 during the remaining 1/3 t _He period.

The number of horizontal pixels of each display is n
Then, the sampling of the video signal is performed at a cycle of t _He / n. As described above, the image display is performed in an area having a width of ⅔ of each display, so that the number of pixels in the horizontal direction in which the image is displayed is ⅔ of all pixels n. Therefore,
The horizontal resolution adjusted to the left and right is (4/3) · n. This ensures 800 horizontal resolutions in a display with 600 horizontal pixels. (Second Embodiment) FIGS. 10 and 11 show a second embodiment of the present invention. In this embodiment, the position of the image displayed on the liquid crystal display of the goggle type television is changed to adjust the degree of overlap of virtual images. In this embodiment, it goes without saying that other displays such as CRT and EL can be used in addition to the liquid crystal display. As the basic configuration and signal processing circuit of the goggle type television, those shown in FIGS. 6 and 7 can be used as in the first embodiment. FIG. 10 is a diagram showing a state in which the left and right virtual images are adjacent and connected, and FIG. 11 is a diagram showing a state in which the left and right virtual images are coincident and overlap.

As shown in FIGS. 10 and 11, the right-eye liquid crystal display 203 and the right-eye magnifying lens 204 correspond to the left and right eyes 201 and 202 (distance deye) of the human.
Liquid crystal display 205 for the left eye and magnifying lens 20 for the left eye
6 is the center distance of the liquid crystal panel from the center position of both eyes to L ₄
Just place them apart. Virtual images 207 and 208 of the image of each liquid crystal display through the magnifying lens are present at a position of distance D ′ from the magnifying lens.

The distance between the liquid crystal displays 203 and 205 and the magnifying lenses 204 and 206 is U, and the magnifying lens 2
If the distance between 04 and 206 and the eyes 201 and 202 is T, and the focal lengths of the left and right magnifying lenses 204 and 206 are both F, the following relationship is established between D ', U, T, and F from the lens formula. To do.

1 / F = -1 / (D'-T) + 1 / U In the present embodiment, the liquid crystal panel used has a horizontal pixel number of 1000, a vertical pixel number of 500, and a screen as compared with a normal 4: 3 screen. It has an aspect ratio of 6: 3, which is somewhat horizontal.

In the display device having such a structure, as shown in FIG.
As shown in 0, by moving the positions of the display areas on the liquid crystal displays 203 and 205 to the outside, it is possible to adjust the degree of overlap of the virtual images, and connect the virtual images based on the above-described principle of the present invention to set an arbitrary aspect. You can get a ratio screen. On the liquid crystal display, as shown in FIG.
It is also possible to display a divided image on the outside of each liquid crystal display and display a virtual image by fusing, as in
It is also possible to arbitrarily set a mode in which the same image is displayed inside each liquid crystal display as shown in FIG. 11 and virtual images are fused and displayed.

The operation of the display device having the above structure will be described below. First, when the positions of the display areas on the respective liquid crystal displays are set so that the image planes where the left and right magnified virtual images coincide are present at a distance D from the eye as shown in FIG. When looking at the center of the eye, the left and right eyes focus on an enlarged virtual image that is away from the eye by D, and converge at the convergence angle θ. By setting the positions of the display areas of the left and right liquid crystal displays in this way, fusion processing is performed without burdening the eyes because focus adjustment and binocular convergence are reasonably linked, as if the eyes were It looks like a large screen is placed at a distance of D from.

In the present embodiment, as described above, the liquid crystal panel used has a horizontally longer size than the normal 4: 3 size. To view an image with a normal aspect ratio using such a liquid crystal panel, the liquid crystal panels 203 and 20 are used.
This is achieved by projecting a desired video in a part of the image display area of 5. That is, as shown in FIG. 11, the optical axis of the magnifying lens and the center of the image display area on the liquid crystal panel are
By setting the image display area in the liquid crystal panel so that the width of the enlarged virtual image is constricted at the center position, it is possible to view an image having the same aspect ratio as the liquid crystal panel used. At this time, if the image display area displayed on the liquid crystal panel is set with an aspect ratio of 4: 3, it is
You will be able to see the normal 4: 3 video. Of course, when it is desired to see a video image having another aspect ratio, the video signal may be transferred to the liquid crystal panel so that the image display area has the aspect ratio.

On the other hand, when the image display areas of the left and right liquid crystal displays are shifted outward as compared with the case shown in FIG. 11 as shown in FIG. 10, the screens transferred to the two enlarged virtual images are exactly the same. Then, the human eye somehow tried to think of these two screens as if they were one screen,
As a result, it puts a strain on the eyes and causes binocular rivalry. However, if the two magnified virtual image screens are completely different, the human eye tries to see them as two screens instead of one, and fusion processing is performed in the cerebral center. And finally, it looks like the two screens are connected at the center of the screen.

As a result, the human eye can see the screen as if the aspect ratio of the screen had changed. For example, when the aspect ratio of the image display area of each liquid crystal display is 8: 9, and when the positions are adjusted so that the two magnified virtual images do not overlap at all, a 16: 9 wide screen display is obtained. Also, by adjusting the overlapping width of the two magnified virtual images, it is possible to display a wide screen with another aspect ratio. Also, in this case, the horizontal resolution of the screen actually seen by the human eye is 2 times that of the liquid crystal panel used simply.
The vertical resolution is the same as that of the liquid crystal panel used. For example, in the case of widescreen display in which the number of horizontal pixels in the image display area of each liquid crystal panel is 700 and the number of vertical pixels is 500, and 16: 9, 700,000 pixels (140 horizontal pixels)
It is equivalent to watching an image of 0 × vertical pixel number 500). With this resolution, the vertical resolution is about half of that of the standard for high-definition video (1125 for high-definition
There is a resolution of about 40 MHz in the horizontal direction, and you can enjoy images with a sufficiently high resolution compared to MUSE format images (about 20 MHz in the horizontal direction). (Third Embodiment) FIG. 12 shows a third embodiment of the present invention. In the first and second embodiments, the display device that displays by a virtual image has been described, but in the present embodiment, a case where the present invention is applied to a projection type liquid crystal display device that projects a real image will be described.

The projection unit 401 shown in FIG.
The right liquid crystal display, the right magnifying lens, and the projection light source, which form the first display means, and the left liquid crystal display, the left magnifying lens, and the projection light source, which form the second display means, are housed as a unit. There is. Furthermore, it has a built-in control unit to control the position where the images on both LCDs are displayed.

The display device having such a structure is composed of the first and second display devices.
By the position control means of the display image as described in the embodiment,
For example, the input video signal is a normal 4: 3 aspect ratio.
The two projected images are completely overlapped when
Is set so that the 16: 9 HD signal is
Then, as shown in FIG. 12, the overlap between the two projected images
Each liquid crystal display to reduce
You can adjust the position of the image projected on
It The liquid crystal display used is 1000 horizontal pixels,
500 vertical pixels, screen aspect ratio of 6: 3
Is. Such a projection type liquid crystal display device
, Input a high-definition video signal from outside and project
When I saw the video, I saw a video with an aspect ratio of 16: 9.
I was able to At this time, the high-definition video sent
The image signal is divided into two in the horizontal direction and the left and right liquid crystal displays are divided.
Transferred to the spray. Also, the number of scanning lines is high-definition
Only about half of the signal standard (1125 lines), but
For interlaced signal, odd field signal and even signal
Each field signal can be transferred to the same scan line.
With, you can get enough high resolution images without flicker.
I found out that (Fourth Embodiment) FIG. 13 shows a fourth embodiment of the present invention.
The video signal / black signal switching switch of the signal processing circuit of FIG.
The line memory is inserted after the switch. Figure 7
In the case of the signal processing circuit of
Is the effective horizontal scanning period t of the high-definition video signal_HeHalf of
Period t_He(2/3) n times during / 2, that is, (3
t _He) / (4n) cycle must be sampled
I have to. The sampling period for normal display is t /
n (t: t is about 2 in the effective scanning period of the NTSC signal)
t_He) And the sampling is done at this 3/8 interval
Must be done. For example, if the number of horizontal pixels is 600
For display, sampling is usually about 80 nsec
Must be shortened to 30 nsec. like this
Liquid crystal displays that can support high-speed sampling are common
Is difficult to obtain. Therefore, the line memory 51 of the present embodiment
5,516 are for solving this problem.
The signal transfer from the signal processing circuit to the line memory is (3t_He)
/ (4n) sampling period, but line memo
The signal transfer from the memory to the display device is about 3 as shown in FIG.
t_HeThis should be done n times during the period of (approximately 1.5t).
Is a normal display sampling (display of horizontal pixel 600
It is more than 1.5 times the cycle for a ray (about 120 nsec).
The display of the present invention on a commonly available liquid crystal display.
Can be realized. (Fifth Embodiment) FIG. 15 shows the fifth embodiment of the present invention.
A device that enables stereoscopic display using a pair of right display devices
In addition, a two-dimensional wide screen display with an aspect ratio of 16: 9
Is possible.

In FIG. 15, when the switch 1011 is connected to the stereoscopic display side, the left-eye and right-eye HDTV image signals 1001 and 1003 enter the left-eye and right-eye image signal processing circuits 1005 and 1008. , And enters the left and right display devices 1014 and 1015. Left eye and right eye timing signal generation circuit 1007,
From 1010, the sampling is performed by thinning out the original sampling in the horizontal and vertical directions, and
A display device for NTSC having an aspect ratio of 4: 3 can be used for 14,1015. When the switch 1011 is switched to the wide display side, the configuration is the same as that in FIG. 7, and the display with the aspect ratio of 16: 9 becomes possible as shown in the first embodiment. In addition, 1004 is a three-dimensional, wide display switching signal,
Reference numerals 1006 and 1009 denote sync separation circuits, 1012 and 101.
Reference numeral 3 is a switch for switching between the black signal 1002 and the video signals 1001 and 1003. (Sixth Embodiment) FIG. 16 is a sixth embodiment of the present invention. In the device having the same purpose as the fifth embodiment, video signal processing circuits 1005 and 1008 and display devices 1014 and 101 are provided.
13 is inserted between the line memories 1101 and 1102, respectively.
As described above, the sampling cycle of the display device can be made long, and the present invention can be realized by a commonly available liquid crystal display.

The process of dividing the image signal so that the image is divided in the horizontal direction is shown in FIG. 7, FIG. 13, FIG. 15 and FIG.
Even if each of the signal processing circuits is not used, the present invention can be similarly applied if, for example, the subject is divided and photographed and the video signals are transferred separately when the subject is photographed.

[0050]

As described in detail above, according to the present invention, it is possible to provide a display device which uses the technology of the existing display device and can change the aspect ratio of the display screen. Furthermore, for example, in the case of displaying a high-definition video signal, it is possible to provide a display device capable of displaying a video without impairing the original resolution as much as possible.

The present invention is not limited to a display device using a liquid crystal display, but other displays,
Needless to say, the same effect can be obtained by using a CRT, a plasma display, an EL display, or the like.

[Brief description of drawings]

FIG. 1 is a schematic diagram for explaining the principle of a display device of the present invention and a first embodiment thereof.

FIG. 2 is a schematic diagram for explaining the principle of the display device of the present invention and the first embodiment thereof.

FIG. 3 is a diagram for explaining an image display operation of the display device of FIG. 1 or FIG.

FIG. 4 is a schematic diagram showing a configuration of a conventional goggle type television.

5A and 5B are views for explaining the image display operation of FIG.

FIG. 6 is a diagram showing a configuration of a goggle type television.

FIG. 7 is a diagram showing a configuration of a signal processing circuit used in the present invention.

8 is a timing chart for explaining the operation of the signal processing circuit of FIG.

FIG. 9 is a diagram for explaining the image display operation of FIG. 7.

FIG. 10 is a schematic diagram for explaining a second embodiment of the display device of the present invention.

FIG. 11 is a schematic diagram for explaining a second embodiment of the display device of the present invention.

FIG. 12 is a configuration diagram of a third embodiment of the display device of the present invention.

FIG. 13 is a diagram showing a configuration of a signal processing circuit according to a fourth embodiment of the present invention.

FIG. 14 is a timing chart for explaining the operation of the signal processing circuit of FIG.

FIG. 15 is a diagram showing the configuration of a signal processing circuit according to a fifth embodiment of the present invention.

FIG. 16 is a diagram showing the configuration of a signal processing circuit according to a sixth embodiment of the present invention.

[Description of Reference Signs] 1 display means 1 for right eye (first display means) 2 display means for left eye 2 (second display means) 101, 201 right eye 102, 202 left eye 103, 203 right eye Liquid crystal display 104,204 Right eye magnifying lens 105,205 Left eye liquid crystal display 106,206 Left eye magnifying lens 107,207 Virtual image 108,208 Virtual image 301 Display accommodating section 302 Accommodating section 303 Volume 304 Frame section 401 Projection unit 501 High-definition video signal 502 Black signal 503 Video signal processing circuit 504 Sync separation circuit 505 Timing signal generation circuit 506 Changeover switch 507 Left eye display device 508 Right eye display device 509 Changeover switch control signal 510 Changeover switch 511 Control signal 512 Control signal513 video signal 514 switch control signal 515 line memory 516 line memory 1001 high-definition video signal for left eye 1002 black signal 1003 high-definition video signal for right eye 1004 stereoscopic / wide display switching signal 1005 left-eye video signal processing circuit 1006 synchronization Separation circuit 1007 Left eye timing signal generation circuit 1008 Right eye video signal processing circuit 1009 Synchronous separation circuit 1010 Right eye timing signal generation circuit 1011 Switch 1012, 1013 Changeover switch 1014 Left eye display device 1015 Right eye display device 1101 Line memory 1102 line memory

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display area H04N 3/22 A 3/27 5/64 511 A

Claims (6)

[Claims] 1. A first display means, a second display means,
Transferring means for dividing the image signal so as to divide the image in the horizontal direction and sending the divided image signals to the first display means and the second display means, and each division displayed by the first and second display means. And a control unit for controlling the position of the divided display images so that the images are displayed side by side so as to partially overlap or connect in the horizontal direction. 2. A first display means, a second display means,
First transfer means for sending the same image signal to the first and second display means, and image signals for dividing the image in the horizontal direction are separately sent to the first and second display means, respectively. When the same image is sent by the second transfer means and the first transfer means, the position of the display image is controlled so that all the images displayed by the first and second display means are overlapped, When the divided images are sent by the second transfer means, the divided images displayed by the first and second display means are displayed side by side so as to partially overlap or connect in the horizontal direction. And a control means for controlling the position of the display device. 3. The first display means is a display means for the right eye, the second display means is a display means for the left eye, and the first and second display means are respectively in front of the eye. 3. The display device according to claim 1 or 2, which comprises a magnifying optical system and a display element arranged in the above, and the displayed image is a virtual image. 4. The display device according to claim 1, wherein the first and second display means each include a projection light source, a display element, and a magnifying optical system, and the displayed image is a real image. . 5. The method according to claim 1, wherein the control means is means for changing a relative position between the first display means and the second display means. Display device described. 6. The first and second display means each include a display element, and the control means is means for changing the position of the display area of each display element. The display device according to item.