JPS607291A - Stereoscopic video reproducing device - Google Patents

Abstract

PURPOSE:To reduce fatigue of eyes by displaying alternately left and right videos from a pair of eyepiece member provided to a position corresponding to human eyes and forming a stereoscopic picture through a shutter shutting an optical path alternately for the left and right in synchronizing with the period of display thereby avoiding flickering of picture. CONSTITUTION:When a stereoscopic video signal is fed to a video input terminal 15, the signal is discriminated as the stereoscopic video signal by a signal discriminating circuit 19 and a television receiver 11 displays alternately a picture corresponding to left and right eyes on a video tube face 12 at each field. On the other hand, a shutter section 13 is phase-controlled by a shutter phase control circuit 17 and when a right signal is displayed on the video tube face 12, a part of the shutter section 13 corresponding to the right eye only is opened, the part corresponding to the left eye is closed and the picture on the video tube face 12 is observed by the right eye only. When the left side signal is displayed on the video tube face 12, the picture is observed by the left eye only conversely, and the picture can be seen as a stereoscopic video because of the afterimage of eyes when viewed from left and right two directions.

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention alternately displays images taken by two left and right cameras, and in synchronization with this, the images are sequentially viewed with the left and right eyes alternately. It relates to a 3D image reproduction device that is configured so that images can be viewed as 3D images.

Conventional Structure and Problems Conventionally, in this type of device, a rotating disk in which transparent parts and light shielding parts are alternately provided is used as a means of blocking the optical path alternately on the left and right sides. There is a system in which a stereoscopic image is obtained by rotating the left and right images in synchronization with the display cycle of the left and right images and viewing the images through a rotating disk3. ]°Explain the raw equipment. FIG. 1 is a sectional view showing a schematic configuration of a conventional stereoscopic image rIi production device. In the figure, a television receiver 2 is installed inside a cabinet 1, and a shutter part 4 is built in a position facing a video tube surface 3 of a television receiver a2, and an eyepiece member provided on the shutter part 4. 5), so that the saw images can be viewed throughout the screen on the video screen 3 of the television receiver 2.

FIG. 2 is a front view of the shutter part 4, in which a pair of drive motors 6a and sb are arranged in parallel at a predetermined interval. , 1 drive motors 6a, 6b have shutter disks sa, sb attached to drive shafts 7a, yb. The glossy discs 8a and 8b are made of transparent acrylic plates, etc., and half of the shutter discs aa and ab are black-painted light shielding parts 9a.

9b is sunk. In addition, shutter disks sa, s
A rotational phase detection means (not shown) is provided on b, and is synchronized with the display cycle of left and right images supplied to the television receiver 2 by a control circuit.
, eb are configured to control the relative rotational phases of the . Therefore, the left and right eyepiece members 5a, 5b, and the shutter disc 8a.

The picture tube surface 3 of the television receiver 2 in front can be seen via the shutter disk 8a.

A stereoscopic image can be obtained by alternately blocking the light from the video tube surface 3 on the left and right sides according to the rotation of the video tube 8b.

However, in the configuration described in item 2, even if the video signal supplied to the television receiver is a normal video signal (the left and right signals are the same) that cannot be viewed stereoscopically, the shutter disk rotates, so the eyepiece Even if the image of the television receiver 2 is viewed through the member 5, the image only flickers due to the rotation of the shutter disc, and stereoscopic viewing is not possible, and there is a problem in that the eyes become tired if the image is continued to be viewed.

OBJECTS OF THE INVENTION An object of the present invention is to provide a stereoscopic video playback device that does not flicker images and can reduce eye fatigue even when a normal video signal that cannot be viewed stereoscopically is supplied.

Structure of the Invention The three-dimensional image reproducing apparatus of the present invention includes a display means for alternately displaying left and right images from a pair of eyepiece members provided at positions corresponding to human eyes, and an optical path that alternates left and right in synchronization with the display cycle. and a detection means for detecting whether or not the image displayed on the display means can be viewed stereoscopically, and a shutter means for opening both the left and right sides. When stereoscopic viewing is not possible, the control means opens both the left and right shutters, thereby allowing images that cannot be viewed stereoscopically to be viewed with both eyes at the same time. It is something.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 3 is a block diagram of main parts showing the configuration of a three-dimensional video playback device according to an embodiment of the present invention. In the figure, a shutter part 13 is installed inside the cabinet 10 at a position facing the picture tube surface 12 of the television receiver 11. The picture tube surface 12 of the television receiver 11 through the eyepiece member 14 of
You can see the image projected on the screen.

On the other hand, if the video signal supplied to the video input terminal 16 is a stereoscopic video signal, the video signals corresponding to the left and right screens are alternately switched for each field of NTSC Shinsou. For example, the odd-numbered field is configured to be a right-side video signal, and the even-numbered field is configured to be a left-side video signal. From the video signal supplied to the video input terminal 15, only the synchronization signal is separated by the synchronization separation circuit 16 and is supplied to the shutter phase control circuit 17. /Yanotar phase control circuit 1
7 controls the opening/closing operation of the 7-side part 13 in response to all fields and even fields of the synchronization signal, and through a pair of left and right eyepiece members 14, synchronizes with the left and right video signals, and displays the video screen. 12 can be seen. In fact, the video signal supplied to the video input terminal 15 is supplied to the television receiver P9.11 as well as to the signal discrimination circuit 19. The signal discrimination circuit 19 is a circuit that discriminates whether the video signal supplied to the video input terminal 15 is a stereoscopic video signal with different left and right sides, or a normal video signal with the same left and right sides, and its operating principle will be described below. Explain.

FIG. 4 shows images corresponding to left and right video signals, and the left image 20 that can be seen with the left eye and the right image 21 that can be seen with the right eye are different images.

Naturally, the video signals of the left image 20 and the right image 21 are different, and unless these two left and right video signals are alternately switched for each field to create a stereoscopic video signal, the video signals of the odd and even fields cannot be used. If they are significantly different, it can be determined that the signals are stereoscopic video signals. Note that in the case of a normal video signal that is not a stereoscopic video signal, it can be determined that it is not a stereoscopic video signal because the odd and even fields are almost the same video signal.

Therefore, when a normal video signal is supplied to the video input terminal 15, the signal discrimination circuit 19 determines that it is a normal video signal, and supplies the discrimination signal to the shutter phase control circuit 17. At this time, the shutter phase control circuit 1 is configured to control both the left and right shutter parts 13 to an open state.

Further, since the configuration of the shutter part 13 is the same as that of the conventional example, a description thereof will be omitted here.

The operation of the stereoscopic video reproducing apparatus of this embodiment configured as described above will be described below. First, video input terminal 1
When a stereoscopic video signal is supplied to 5, the signal discrimination circuit 19
It is determined that the signal is a stereoscopic video signal, and the television receiver 11 alternately projects images corresponding to the left and right eyes on the video tube surface 12 for each field.

On the other hand, the shutter part 13 is controlled by the Nyatter phase control circuit 17.
When the right signal is projected on the picture tube surface 12, only the part of the shutter part 13 corresponding to the right eye is open, the part corresponding to the left eye is closed, and the image is displayed only by the right eye. An image of the tube surface 12 can be viewed. Next, when the left side signal is displayed on the picture tube surface 12, the right eye part of the shutter part 13 is closed and the left eye part is opened, so that the image can be seen only with the left eye.

In this way, the left and right images are viewed alternately on the video tube surface 12, but due to the afterimage phenomenon in the eyes, it appears as if the image on the right side is viewed continuously with the right eye and the image on the left side with the left eye.
It can be viewed as a three-dimensional image viewed from any direction.

Next, when a normal video signal that cannot be viewed stereoscopically is supplied to the video input terminal 15, the signal discrimination circuit 19 determines that it is not a stereoscopic video signal, and the Nyanota phase control circuit 17 controls the Nyanota part 13 on both the left and right sides. When opened, the image projected on the video tube surface 12 can be viewed with both eyes.

As described above, this embodiment includes a detection means for detecting whether or not the image displayed on the display means can be viewed stereoscopically, and when stereoscopic viewing is not possible, the displayed image is made visible to both eyes at the same time. Can reduce eye fatigue.

In the above-mentioned embodiment, a signal discrimination circuit is used as a detection means for detecting whether stereoscopic vision = J' function or not, and the video signals of odd and even fields are compared and discriminated. It is also possible to superimpose a discrimination signal indicating that the signal is a stereoscopic video signal, and use this discrimination signal to determine whether or not stereoscopic viewing is possible.

Effects of the Invention As is clear from the above explanation, the three-dimensional image 1 of the present invention
The 1f display device I'σ is installed at a position corresponding to the human eye, and has a display means for alternately displaying left and right images from a pair of eyepiece members. The camera is configured so that stereoscopic viewing can be achieved by viewing through one means for blocking the image, and a detection means for detecting whether or not the image displayed on the display means can be viewed stereoscopically; The control means opens both the left and right shutter means when stereoscopic viewing is not possible, so that when a video signal that does not allow stereoscopic viewing is supplied, the control means opens both the left and right eyes. Since the displayed image can be seen at the same time, flickering of the image can be prevented and eye fatigue can be significantly reduced.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing the schematic configuration of a conventional stereoscopic image reproducing device, Fig. 2 is a front view of a part of the device used in the conventional example, and Fig. 3 is an example of the present invention. FIG. 4 is a block diagram of main parts showing the configuration of such a three-dimensional video reproducing apparatus, and a conceptual diagram showing left and right images. 1, 11--television receiver, 12--video screen, 13--shutter Part, 17
...-Noyanotar phase control circuit, 19 - Signal discrimination circuit. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
figure? 3

Claims (1)

[Claims] A pair of eyepiece members provided at positions corresponding to the human eyes are used to view a display device that alternately displays left and right images through a shutter device that alternately blocks the left and right optical paths in synchronization with the display cycle. the detection means for detecting whether or not the image displayed on the display means can be viewed stereoscopically; further comprising a control means for opening both the left and right shutter means, the detection means 3. A stereoscopic image reproducing apparatus, wherein the control means opens both left and right shutter means when stereoscopic viewing is not possible.