JP2002010300A - Multiple viewpoint type image display device adaptive to many people - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a plurality of observers to observe in the stable condition the stereoscopic or non-stereoscopic images which differ in response to each position and angle of the line of sight. SOLUTION: This unit has multiple off screen buffers and one frame buffer, and the image with the top and bottom image in one frame is copied one after another from multiple off screen buffers in one frame buffer. In the frame buffer, the image is swapped from the back buffer to the front buffer in synchronism with vertical synchronizing signal and is subsequently displayed on a monitoring device. Each liquid crystal shutter glasses on which a plurality of observers putted is turned on and off according to right and left or simultaneously in synchronism with the synchronizing signal and enables a plurality of observers to observe this different image subsequently displayed as the stereo or non-stereoscopic image.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention utilizes liquid crystal shutter glasses that allow each observer to stereoscopically or non-stereoscopically view different CG images and real images when observing a single screen with a large number of people. The present invention relates to a multi-view, multi-viewpoint video display device.

[0002]

2. Description of the Related Art FIG. 1 is a diagram showing a conventional image display device, particularly a stereoscopic CG image display device as an example. Figure 1
As shown in FIG. 1A, this conventional three-dimensional CG image display device includes a CG image forming device including an off-screen buffer area and a frame buffer area (specifically, a CPU, a memory, an input / output device, a display device, and a graphic device). A device that can create a CG image provided with an accelerator or the like.), A monitor device that displays the CG image formed by the CG image forming device, and a liquid crystal worn by an observer who observes the CG image displayed by the monitor device It is mainly composed of shutter glasses.

[0003] The off-screen buffer area has a buffer function of preparing an image drawn by a graphic accelerator or the like as an image of one screen (frame) in advance.
The image formed in this off-screen buffer area
The data is copied to the frame buffer area and displayed on the monitor device.

In FIG. 1B, the frame buffer area has a front buffer and a back buffer, and images for left-eye and right-eye observation are drawn in upper and lower areas of a frame I of the back buffer, respectively. The data is sequentially swapped to a front buffer in synchronization with a vertical synchronization signal from a vertical synchronization signal generator (not shown). The image of the frame II swapped in the front buffer is displayed on the monitor device, and the upper and lower images are displayed on the monitor device as a frame I and a frame II sequentially in the vertical direction in synchronization with the vertical synchronization signal.

The CG image forming apparatus further includes a synchronizing signal transmitting apparatus, while the liquid crystal shutter glasses include a synchronizing signal receiving apparatus (FIG. 1A).
reference). This synchronization signal transmitting device transmits the vertical synchronization signal (vertical synchronization signal for synchronizing the swap from the back buffer to the front buffer and the display of the upper and lower images) to the outside. Then, the synchronization signal receiving device receives the vertical synchronization signal. The left and right shutters of the liquid crystal shutter glasses open and close sequentially in the left and right directions in synchronization with the vertical synchronization signal received by the synchronization signal receiving device.

In short, the left shutter of the liquid crystal shutter glasses is opened and the image A on the front buffer displayed on the monitor device is viewed by the observer (in synchronization with the vertical synchronizing signal at the timing of swapping from the back buffer to the front buffer). In FIG. 1, two liquid crystal shutter glasses are attached, so that two persons can observe the image.) Observe with the left eye, and in synchronization with the next vertical synchronizing signal, the right shutter of the liquid crystal shutter glasses opens and the image B under the front buffer is opened. Is observed with the observer's right eye.

Further, the image C swapped from the back buffer to the front buffer in synchronization with the next synchronization signal.
Is observed by the observer's left eye through the left shutter of the liquid crystal shutter glasses opened in synchronization with the vertical synchronization signal, and the image D is further observed through the left shutter of the liquid crystal shutter glasses opened in synchronization with the vertical synchronization signal. Observe with.

As described above, the left and right shutters of the liquid crystal shutter glasses open and close in synchronization with the vertical synchronizing signal. The observer wearing the liquid crystal shutter glasses can view the upper and lower images of the front buffer image through the left and right shutters. The left eye,
Observe alternately one after another with the right eye. Thus, a stereoscopic image can be observed on the monitor display device by the afterimage effect of the left and right eyes.

More specifically, this image has a vertical synchronizing signal timing of 60 in a synchronizing signal transmitting device of liquid crystal shutter glasses.
In the case of Hz, up and down are displayed in order at 120 Hz. At that time, one eye of the liquid crystal shutter is closed for 1/120 second, and the other eye is closed for the next 1/120 second.

By using a plurality of liquid crystal shutter glasses that perform the same operation, it is possible for many people to simultaneously observe the same stereoscopic image.

In the conventional method, a plurality of, in particular, a large number of observers use exactly the same liquid crystal shutter glasses (a plurality of liquid crystal shutter glasses have the same configuration in which the left and right shutters are sequentially opened and closed separately at the same timing). If you wear glasses, you can observe the same stereoscopic image.

However, when the opening and closing operations of the liquid crystal shutter glasses worn by the observer A and the liquid crystal shutter glasses worn by the observer B are different from each other in synchronization with the vertical synchronization signal, the two observers are different. A stereoscopic image can be observed.

For example, regarding the image of the front buffer shown in FIG. 2A, the observer observes the upper image A with the left eye and the lower image B with the right eye at the next vertical synchronization timing. 2 can be observed, and in FIG. 2 (b), for the next image swapped from the back buffer, the observer B views the upper image C with his left eye.
By observing the lower image D with the right eye at the next vertical synchronization timing, the second stereoscopic image can be observed. By repeating this, the two observers can observe different stereoscopic images.

Similarly, as shown in FIGS. 3 (a) to 3 (c), it is also possible for three persons, Kotoei, to observe completely different first to third stereoscopic images. In addition,
It is also possible to apply to a large number of people.

Although the above is a configuration in which a plurality of observers can view different images in a stereoscopic manner, the above-described configuration can also be used as a configuration capable of not only stereoscopic viewing but also non-stereoscopic viewing. That is, for example, in the configuration illustrated in FIG. 2, the observer A and the observer B stereoscopically view the image. It is only necessary to use liquid crystal shutter glasses that open and close simultaneously. In the case of non-stereoscopic viewing, twice as many observers can observe different images as in the case of stereoscopic viewing. For example, the configuration shown in FIG.
In the case of observation by four people, the following is the case.

Observer A wears liquid crystal shutter glasses that open simultaneously on the left and right in accordance with the timing at which image A of the front buffer is displayed on the monitor device, and observer B at the timing at which image B of the front buffer is displayed on the monitor device. At the same time, the observer wears liquid crystal shutter glasses that simultaneously open left and right at the same time as the image C in the front buffer is displayed on the monitor device.
By wearing liquid crystal shutter glasses that open simultaneously on the left and right in accordance with the timing at which is displayed on the monitor device, the four observers can observe non-stereoscopically different images from each other.

[0017]

In the conventional image display apparatus described above, when a plurality of observers observe an image in a stereoscopic or non-stereoscopic view, the observers are required to have a unique viewing angle at each position. Observing the image is ideal.
Also, there are cases where a large number of people need to observe different images, such as when the teacher and the student observe different images, or when both in the battle game observe different images.

In particular, in the case of the above-mentioned three-dimensional image, one stereoscopic image is observed with two images on the left and right, so that the appearance of the three-dimensional image differs due to a slight difference in the observation angle. When a large number of observers observe the same left and right images sequentially with liquid crystal shutter glasses that open and close at exactly the same timing, FIG.
As shown in (a), there is a problem that an accurate three-dimensional image cannot always be observed because the observation position and observation angle of the observer A and B are different.

Therefore, a plurality of observers, such as Party A, Party B, and Hei,
The liquid crystal shutters can be sequentially opened and closed to observe the images (images in consideration of the observer's observation position, observation angle, and the like) sequentially sent to the front buffer and assigned to each observer, respectively. For example, it is possible to observe an ideal stereoscopic image or non-stereoscopic image according to the position and the line-of-sight angle of each observer.

However, the method of allocating a plurality of different images sent to one front buffer to a plurality of observers has the following problems. (1) As the number of observers increases, the occupation time of the image per person decreases, and the frequency of opening and closing of the liquid crystal shutter glasses of each observer decreases, so that a plurality of continuous images (image frames) can be continuously displayed. The illusion as a moving image becomes difficult, and so-called flicker (a discontinuous flickering screen) occurs.

(2) FIG. 4B shows the time required for drawing and the swap waiting time (swap timing) for drawing an image in the back buffer in synchronization with the vertical synchronization. If the image is a simple image, the time α required for drawing in the back buffer is short, and many different images can be drawn one after another at each vertical synchronization timing. However, when the image becomes complicated, the time β required for drawing to the back buffer becomes long, and the timing of swapping to the front buffer skips until the next vertical synchronization,
Updating of an image is not guaranteed by one vertical synchronization signal. This makes it impossible to display an image corresponding to each observer.

SUMMARY OF THE INVENTION An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide a multi-person, multi-view video display in which a plurality of observers can observe a stereoscopic or non-stereoscopic image. In the device, different images can be stereoscopically or non-stereoscopically viewed according to the position and the line-of-sight angle of each observer, and the above-mentioned problem that the image is not updated does not occur, and the generation of flicker and the like is suppressed. It is an object of the present invention to realize a multi-viewpoint multi-viewpoint video display device capable of providing a customized screen.

[0023]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a monitor device, an image forming apparatus for forming a plurality of different images for a large number of people displayed on the monitor device, A plurality of liquid crystal shutter glasses having left and right liquid crystal shutters for a multi-person, multi-viewpoint image display device, wherein the image forming apparatus comprises a plurality of off-screen buffer areas, a back buffer, and a front buffer. The upper and lower images included in one frame drawn in each of the plurality of off-screen buffer areas are sequentially copied to the back buffer in the screen buffer area. In the frame buffer area, the upper and lower images are transferred from the back buffer. Swapping to the front buffer in synchronization with the direct synchronization signal, and further displaying the upper and lower images in a time-division manner on the monitor device in synchronization with the vertical synchronization signal. Having a device, the synchronization signal receiving device sequentially receives the synchronization signal transmitted from the synchronization signal oscillating device, the liquid crystal shutters of the plurality of liquid crystal shutter glasses are sequentially opened and closed in synchronization with the received signal, Provided is a multi-person, multi-viewpoint video display device characterized in that many people can observe different images.

In the plurality of liquid crystal shutter glasses, the left and right liquid crystal shutters open and close independently of the left and right independently in synchronization with the received synchronization signal, so that the monitor device can observe different left and right images as a stereoscopic image. It is good also as a structure which performs.

The plurality of liquid crystal shutter glasses have a structure in which the left and right liquid crystal shutters are simultaneously opened and closed right and left in synchronization with the received synchronization signal, so that the same left and right images can be observed as non-stereoscopic images by the monitor device. Is also good.

The plurality of off-screen buffer areas may have a back buffer and a front buffer, respectively.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a multi-person, multi-viewpoint video display apparatus according to the present invention will be described with reference to the accompanying drawings. The multi-person, multi-viewpoint video display device according to the present invention is applicable to both CG images and real images, and is applicable to both stereoscopic images and non-stereoscopic images. In the example description, C
An example applied to a G image is mainly described with a stereoscopic image,
Examples applied to non-stereoscopic images will be described as necessary.

(Embodiment 1) FIGS. 5 to 8 show a first embodiment of a multi-person, multi-viewpoint image display apparatus according to the present invention. One that displays a three-dimensional image for two persons, two persons, will be described. As shown in FIG. 5, the overall configuration of the multi-person, multi-viewpoint image display device includes a CG image forming device, a monitor device such as a projection device for displaying a CG image formed by the CG image forming device, and It mainly comprises a plurality of different liquid crystal shutter glasses worn by an observer observing an image displayed on the monitor device.

The CG image forming apparatus is, specifically, a CP
U, a memory, an input / output device, a display device, a graphic accelerator, and the like. The CG image forming device of the present invention is particularly capable of creating an image.
(Hereinafter, the “off-screen buffer area” is simply referred to as “off-screen buffer” in the present specification and drawings.) And a frame buffer area including a back buffer and a front buffer (“frame buffer”). The "area" is hereinafter simply referred to as "frame buffer" in the present specification and drawings) and a synchronization signal transmitting device. The off-screen buffer has a back buffer and a front buffer, respectively. In the first embodiment, two off-screen buffers are provided, but a plurality of off-screen buffers are usually provided corresponding to the number of observers.

FIG. 6 is a processing flowchart of the off-screen buffer drawing process and the frame buffer copy (write) process. As described in FIG. 6, in the first and second off-screen buffers,
The images A, B and C, D swapped from the back buffer to the front buffer, respectively, are sequentially copied from the front buffer to the back buffer of the frame buffer. Then, in the frame buffer, images are sequentially swapped from the back buffer to the front buffer and projected on the monitor device.

The CG image forming apparatus has a synchronizing signal transmitting device, while the plurality of liquid crystal shutter glasses each have a synchronizing signal receiving device. This synchronizing signal transmitting device transmits a vertical synchronizing signal for synchronizing the swap from the back buffer of the frame buffer to the front buffer to the outside. Each of the synchronization signal receiving devices for a plurality of liquid crystal shutter glasses receives the vertical synchronization signal. The left and right shutters of the liquid crystal shutter glasses open and close independently of the left and right independently in synchronization with the vertical synchronization signal received by the synchronization signal receiving device.

FIG. 7 is a diagram for explaining the operation of the multi-person, multi-viewpoint image display apparatus according to the first embodiment. FIG. 7 (a)
This shows a state in which images A to H formed by the CPU, the graphic accelerator, and the like are sequentially written in the first and second off-screen buffers, respectively. In this state, the images A to D are swapped from the back buffer to the front buffer in the first and second off-screen buffers, respectively.

From this state, as shown in FIGS. 7B and 7C, the images AB and CD copied to the first off-screen buffer and the second off-screen buffer, respectively.
Are sequentially copied to the frame buffer in synchronization with the vertical synchronization signal. Then, in the frame buffer, the images A, B, C, and D are sequentially swapped from the back buffer to the front buffer, as shown in FIGS. 7B and 7C. Images swapped to the front buffer
The upper and lower images A, B, C, and D are sequentially and separately displayed on the monitor device in synchronization with the vertical synchronization signals.

In the case where the two persons are observing the image projected on the monitor device in this way, in the frame buffer,
The left shutter of the liquid crystal shutter glasses on the instep shown in FIG. 5 is opened in synchronization with the vertical synchronizing signal which takes the timing of swapping from the back buffer to the front buffer.
As shown in (b), the image A on the front buffer of the frame buffer is observed, and the left shutter of the liquid crystal shutter glasses of the user B is opened and the image B under the front buffer is observed in synchronization with the next vertical synchronization signal. can do.

Further, in FIG. 7C, the right shutter of the liquid crystal shutter glasses on the instep A is opened, and the image C on the front buffer copied from the image on the off-screen buffer is observed. In synchronization with this, the right shutter of the liquid crystal shutter glasses of the user can be opened, and the image D under the front buffer copied from the image under the off-screen buffer can be observed.

A case where the multi-person, multi-viewpoint image display apparatus having such a configuration is applied so that two observers, Kotsu O, observe a stereoscopic image will be further described with reference to a timing chart. FIG. 8 is a timing chart for explaining the operation of the multi-person, multi-viewpoint image display device according to the first embodiment. This chart shows the timing of drawing to the first and second off-screen buffers and the timing of copying to the frame buffer. Furthermore, the left and right shutters of the liquid crystal shutter glasses worn by the observer A and the party B respectively. , The timing of opening and closing independently and sequentially in synchronization with the vertical synchronization signal and the images A to
H is shown.

In FIG. 8, images A to H formed by a CPU, a graphic accelerator, and the like are first and second images.
Are drawn to the offscreen buffers of This timing is not particularly synchronized with the vertical synchronization signal. The first and second off-screen buffers swap images from its back buffer to the front buffer, respectively. Then, upper and lower images A, B and C, D (A / B and C / D in FIG. 8) are obtained from the first and second off-screen buffers.
And description. ) Are synchronized with the vertical synchronization signal in the back buffer of the frame buffer, and the timings (o,
.., etc.). The copied images A to D are swapped in the front buffer at the timing of the next triangle mark in synchronization with the vertical synchronizing signal after waiting for swap, and are displayed one after another on the monitor device.

Images A to D displayed one after another in this way
Is synchronized with the vertical synchronizing signal at timings o to r, the left shutter of the liquid crystal shutter glasses worn by the observer A → the left shutter of the liquid crystal shutter glasses worn by the observer B → the right of the instep A The shutter → the right shutter of the second party is sequentially opened (ON in the figure), and the images A to D corresponding to the left and right eyes of the second party instantaneously correspond to the images A and C, respectively. D can be observed, and as a result, different stereoscopic images can be observed.

As described above, if the CG image forming apparatus is configured to include one frame buffer and a plurality of off-screen buffers, the contents drawn in the front buffers of the plurality of off-screen buffers are vertically transferred to the frame buffer. Since it is copied one after another at the timing of synchronization,
The problem that the update of the image described in the section of the problem is not guaranteed can be solved. Then, in the off-screen drawing process, each observer image is drawn to the off-screen back buffer. Since the content of the image itself in the off-screen back buffer is not directly presented to the observer on the monitor device, there is no need to synchronize the swap with the vertical synchronization signal of the monitor device.

(Embodiment 2) The above description has been made with reference to an example in which the present invention is applied to two observers, but the same applies to three or more observers. 9 to 11 are diagrams for explaining a second embodiment of a multi-person, multi-viewpoint image display apparatus according to the present invention, in which the number of viewers is four.
The figure shows a multi-person, multi-viewpoint video display device for stereoscopically viewing images having different names (not shown, but the observer is from A to D). The CG image forming apparatus of the multi-person, multi-viewpoint video display apparatus includes first to fourth off-screen buffers and one frame buffer.

FIGS. 9 and 10 show the drawing states of the first to fourth off-screen buffers and the frame buffer when displaying on a multi-person, multi-viewpoint video display device. FIG. 11 shows a timing chart in which the drawing timing and the four observers A to D observe the corresponding images A to H in synchronization with the left and right shutters of the liquid crystal shutter glasses worn respectively.

At the time of display, first, as shown in FIG. 9, the images A to R are respectively written in the front buffer and the back buffer of the first to fourth off-screen buffers. Regarding the front buffer, the images A to H are swapped from the back buffer. These first to first
Each image swapped to the front buffer of the fourth off-screen buffer is synchronized with the vertical synchronization signal,
As shown in FIG. 10, one process is sequentially copied to the frame buffer, and this is repeated. Then, in the frame buffer, the data is sequentially swapped from the back buffer to the front buffer. Then, the image swapped to the front buffer of the frame buffer is projected on the monitor device.

Each of the observers A to D wears liquid crystal shutter glasses in which the left and right shutters are independently opened and closed, observes different images with either the left or right eye, and as a result, obtains different stereoscopic images. Can be observed. That is, FIG.
At 0, the images A to H are synchronized with the left and right shutters of the liquid crystal shutter glasses worn by the observer A to D, respectively.
The left and right eyes of the observer A to D are sequentially assigned as follows. Image A is the left eye of the instep → Image B is the left eye of the second party → Image C is the left eye of the hei → Image D is the left eye of Ding → Image E is the right eye of the instep → Image F
Is B's right eye → Image G is Hei's right eye → Image H is Ding's right eye,
Assigned respectively.

This operation will be further described with reference to a timing chart shown in FIG. From the first to fourth off-screen buffers, an image frame including A and B, an image frame including C and D, an image frame including E and F, and an image frame including G and H are output at triangular timings. It is sequentially copied to the back buffer of the frame buffer. And
These images are swapped to the front buffer at the timing of the next triangle mark (for example, q next to o) after waiting for swap, and displayed one after another on the monitor device.

The images displayed one after another on the monitor device in this manner are shown in a timing chart of the left and right shutters of the liquid crystal shutter glasses of the viewers A to D at respective timings o to v in synchronization with the vertical synchronization signal. Open (ON in the chart) as described above, and observe one after another in the order of the assignment.
As a result, the observer Ko-Ding has their respective positions (viewpoint positions),
It is possible to stereoscopically view a unique image in which the viewing angle is considered.

(Embodiment 3) In the above, a case has been described in which a plurality of observers stereoscopically view different images. However, a configuration in which a plurality of observers non-stereoscopically view different images may be employed. In this case, the liquid crystal shutter glasses have a configuration in which the left and right are opened and closed simultaneously, instead of a configuration in which the left and right are opened and closed separately.

FIG. 12 is a view for explaining a third embodiment of the multi-person, multi-viewpoint image display apparatus according to the present invention. In this third embodiment, images different from each other by four persons, ie, observer A to D, are displayed. The configuration for non-stereoscopic viewing is shown. For non-stereoscopic viewing,
The number of off-screen buffers may be half the number of observers. In the third embodiment, as shown in FIG. 12A, there are provided first and second off-screen buffers and one frame buffer.

The images A to H written in the first and second off-screen buffers are sequentially copied to a frame buffer, swapped from a back buffer to a front buffer in the frame buffer, and sequentially displayed on a monitor device. In this case, the eyes of the observers A to D are sequentially allocated in the following manner in synchronization with the shutters of the liquid crystal shutter glasses worn by the four observers A to D. That is, image A is the left and right eyes of the instep → image B is the left and right eyes of the user → image C is the right and left eyes of the hei → image D is the right and left eyes of the dent → image E is the left and right eyes of the instep →
Image F is B's left and right eyes → Image G is Hei's left and right eyes → Image H
Are assigned to the left and right eyes of the Ding.

FIG. 12 (b) is a timing chart showing the timing of copying from the first and second off-screen buffers to the back buffer of the frame buffer and the timing of opening and closing the liquid crystal shutters of the observers A to D.
The images A, B, etc. copied to the back buffer of the frame buffer at the timing of the triangle are swapped to the front buffer at the timing of the next triangle (eg, q next to o), and displayed one after another on the monitor device. You.

As shown in FIG. 12B, the left and right shutters of the liquid crystal shutter glasses of the observers A to D are simultaneously opened left and right at the timings o to v in synchronization with the vertical synchronization signal (ON in the chart). ). Thus, the observer can view a series of different images successively displayed on the monitor device one after another in the order of the assignment. As a result, the observers A to D can observe their own images A to H in consideration of their viewpoint positions and line-of-sight directions simultaneously and non-stereoscopically with their left and right eyes.

Although the embodiments of the present invention have been described based on the embodiments, the present invention is not limited to the above-described embodiments, and various modifications may be made within the scope of the technical matters described in the claims. It goes without saying that there are embodiments.

[0052]

According to the present invention having the above configuration, a plurality of observers can simultaneously observe different stereoscopic images or non-stereoscopic images simultaneously using one monitor device (CRT display, projector, etc.). Therefore, the observation space can be shared. Furthermore, in the multi-person, multi-viewpoint video display device that is observed by a plurality of persons, different stereoscopic or non-stereoscopic images can be observed according to the respective viewpoint positions and line-of-sight directions, and the image is not updated. It is possible to provide a stable screen without causing any problem and suppressing the occurrence of flicker and the like.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining a conventional technique.

FIG. 2 is a diagram for explaining a conventional technique.

FIG. 3 is a diagram for explaining a conventional technique.

FIG. 4 is a diagram for explaining a conventional technique and problems.

FIG. 5 is a diagram illustrating a first embodiment of a multi-person, multi-viewpoint image display device according to the present invention.

FIG. 6 is a flowchart illustrating the operation of the main part of the first embodiment.

FIG. 7 is a diagram illustrating the operation of the first embodiment.

FIG. 8 is a timing chart illustrating the operation of the first embodiment.

FIG. 9 is a diagram illustrating a second embodiment of a multi-person, multi-viewpoint video display device according to the present invention.

FIG. 10 is a diagram illustrating the operation of the second embodiment.

FIG. 11 is a timing chart illustrating the operation of the second embodiment.

FIG. 12 is a diagram illustrating a third embodiment of a multi-person, multi-viewpoint image display device according to the present invention.

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) G09G 3/36 G09G 3/36 (72) Inventor Takehiro Matsuo 2-20-1 Tsuruyacho, Kanagawa-ku, Yokohama-shi, Kanagawa Prefecture YTU Building 2H088 EA07 EA08 MA01 MA20 5C006 AA22 AB05 AF44 AF78 EA00 EC12 EC13 FA23 5C061 AA03 AA13 AA20 AB12 AB14 AB17 AB20 5C080 AA18 BB05 CC04 DD06 EE25 FF09 GG02 JJ04 JJ02JJ01

Claims (4)

[Claims] 1. A monitor device, an image forming device for forming a plurality of different images for a large number of people displayed on the monitor device, and a plurality of liquid crystal shutter glasses having left and right liquid crystal shutters for the large number of people. A multi-person, multi-viewpoint video display apparatus comprising: the image forming apparatus has a plurality of off-screen buffer areas, a frame buffer area including a back buffer and a front buffer, and a synchronization signal oscillating apparatus. The upper and lower images included in one frame respectively drawn in the plurality of off-screen buffer areas are sequentially copied to the back buffer of the screen buffer area, and the upper and lower images are copied in the frame buffer area. ,
Swapping from the back buffer to the front buffer in synchronization with the vertical synchronization signal, and further displaying the upper and lower images in a time-division manner on the monitor device in synchronization with the vertical synchronization signal. Each of the liquid crystal shutters of the plurality of liquid crystal shutter glasses has a synchronization signal receiving device, the synchronization signal receiving device sequentially receives the synchronization signal transmitted from the synchronization signal oscillating device, and synchronizes with the reception signal. A multi-person, multi-viewpoint image display device, which is opened and closed sequentially so that many people can observe different images. 2. The liquid crystal shutter glasses, wherein the left and right liquid crystal shutters respectively open and close independently independently of the left and right in synchronization with the received synchronization signal, and observe the left and right images as stereoscopic images on the monitor device. 2. The multi-viewpoint multi-viewpoint video display device according to claim 1, wherein the multi-viewpoint video display device is adapted to be enabled. 3. The plurality of liquid crystal shutter glasses, wherein the left and right liquid crystal shutters are simultaneously opened and closed simultaneously in synchronization with the received synchronization signal, so that the same left and right images can be observed as non-stereoscopic images on the monitor device. The multi-viewpoint multi-viewpoint image display device according to claim 1, wherein the display device is a multi-viewpoint image display device. 4. The multi-person, multi-viewpoint image display device according to claim 1, wherein the plurality of off-screen buffer areas include a back buffer and a front buffer, respectively.