JPH053799B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention is capable of alternately displaying images taken by two left and right cameras, and in synchronization with this, alternately viewing the images with the left and right eyes. The present invention relates to a three-dimensional video reproducing device configured to allow video to be visually viewed as a three-dimensional image.

Conventional Structure and Problems Conventionally, in this type of device, a rotating disk in which transparent portions and light blocking portions are alternately provided is used as a shutter means for blocking the optical path alternately on the left and right sides. Some devices are designed to rotate in synchronization with the display cycle of left and right images, and to view the images through a rotating disk to obtain a stereoscopic image.

A conventional stereoscopic video reproduction device will be described below with reference to the drawings. FIG. 1 is a sectional view showing a schematic configuration of a conventional stereoscopic video reproduction device. In the figure, a television receiver 2 is built into a cabinet 1, and a shutter section 4 is built in a position facing a picture tube surface 3 of the television receiver 2. It is configured such that an image projected on the picture tube surface 3 of the television receiver 2 can be viewed through the screen.

FIG. 2 is a front view of the shutter section 4,
A pair of drive motors 6a and 6b are arranged in parallel at a predetermined interval. Shutter discs 8a, 8b are attached to drive shafts 7a, 7b of drive motors 6a, 6b. The shutter discs 8a, 8b are made of transparent acrylic plates, etc., and half of the shutter discs 8a, 8b have a light shielding part 9 painted black.
a and 9b are provided. Further, rotational phase detection means (not shown) are provided on the shutter discs 8a and 8b, and are synchronized with the display cycle of the left and right images supplied to the television receiver 2 by the control circuit. It is configured to control the relative rotational phase of the drive motors 6a, 6b. Therefore, the image tube surface 3 of the television receiver 2 in front can be seen via the left and right eyepiece members 5a, 5b and the shutter disks 8a, 8b, and the image tube surface 3 of the television receiver 2 in front can be viewed through the left and right eyepiece members 5a, 5b and the shutter disks 8a, 8b. A stereoscopic image can be obtained by alternately blocking the light from the picture tube surface 3 on the left and right sides.

However, in the above configuration,
The video signal supplied to the television receiver is a normal video signal that cannot be viewed stereoscopically (left and right signals are the same)
Even in this case, the shutter disk rotates, so even if you view the image on the television receiver 2 through the eyepiece member 5, the image will only flicker due to the rotation of the shutter disk, and you will not be able to see it stereoscopically. It had the problem of being tiring.

Purpose of the Invention The purpose of the present invention is to distinguish the video signal even when a normal video signal that cannot be viewed stereoscopically is supplied.
To provide a stereoscopic video playback device that can prevent images from flickering and reduce eye fatigue by performing appropriate processing.

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 the human eyes. The video signal is constructed so as to be able to be viewed stereoscopically by viewing through a shutter means that blocks the image, and the odd field and even field of the video signal displayed on the display means are compared, and the video signal of the odd field and the even field is approximately equal to each other. and a control means for controlling the shutter means to release both the left and right shutter means when the determining means determines that the signal is not a stereoscopic video signal. This enables appropriate processing such as viewing images that cannot be viewed stereoscopically with both eyes simultaneously.

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

FIG. 3 is a block diagram of essential parts showing the configuration of a stereoscopic video reproduction apparatus according to an embodiment of the present invention. In the figure, a shutter section 13 is built into a cabinet 10 at a position facing the picture tube surface 12 of a television receiver 11, and a television image is received through a pair of left and right eyepiece members 14 provided in the shutter section 13. The image projected on the screen 12 of the camera 11 can be viewed.

On the other hand, if the video signal supplied to the video input terminal 15 is a stereoscopic video signal, the video signals corresponding to the left and right screens are alternately switched for each field of the NTSC signal. For example, odd fields are configured as right video signals, and even fields are configured as left video signals. Video input terminal 15
A synchronization separation circuit 16 separates only the synchronization signal from the video signal supplied to the shutter phase control circuit 17 . The shutter phase control circuit 17 controls the shutter opening/closing operation of the shutter unit 13 in response to the odd field and even field of the synchronization signal, and synchronizes the left and right video signals through the pair of left and right eyepiece members 14 to the video tube. Side 1
2 can be seen. Further, the video signal supplied to the video input terminal 15 is supplied to the television receiver 11 and also to the signal discrimination circuit 19. Since the video signal supplied to the video input terminal 15 is a stereoscopic video signal with different left and right sides, the signal discrimination circuit 19 is a circuit that determines whether the left and right sides are the same normal video signal.The operating principle thereof 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 these two left and right video signals are alternately switched for each field to create a stereoscopic video signal, so the video signals of the odd field and even field are different. If they are significantly different, it can be determined that the signal is a stereoscopic video signal. 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 17 is configured to control the shutter section 13 so that both the left and right shutter sections are released.

Further, since the configuration of the shutter section 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,
When a stereoscopic video signal is supplied to the video input terminal 15, it is determined by the signal discrimination circuit 19 that it is a stereoscopic video signal, and the television receiver 11 receives the image 1 corresponding to the left and right eyes from the video tube surface 12. Each field is projected alternately.

On the other hand, the shutter section 13 is phase-controlled by a shutter phase control circuit 17, and when the right side signal is projected on the video tube surface 12, only the portion of the shutter section 13 corresponding to the right eye is opened, and the left eye is The corresponding part is closed, and only the right eye can see the image tube surface 1.
You can see the second image. Next, video tube surface 1
Conversely, when the left signal is being displayed on the left side of the shutter section 13, the right eye portion of the shutter section 13 is closed and the left eye portion is open, allowing the user to view the image 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 two directions, left and right.

Next, when a normal video signal that cannot be viewed stereoscopically is supplied to the video input terminal 15, the signal discrimination circuit 1
9, it is determined that the signal is not a stereoscopic video signal, and the shutter phase control circuit 17 opens both the left and right shutter portions 13, so that the image projected on the video tube surface 12 can be viewed with both eyes.

As described above, this embodiment is equipped with a determining means for determining whether or not the image displayed on the display means can be viewed stereoscopically, and if stereoscopic viewing is not possible, appropriate processing such as making the displayed image visible to both eyes simultaneously is carried out. This can reduce eye fatigue.

Effects of the Invention As is clear from the above description, the stereoscopic image reproduction device of the present invention includes a display means that alternately displays left and right images from a pair of eyepiece members provided at positions corresponding to human eyes. The apparatus is configured to enable stereoscopic viewing by viewing through shutter means that alternately blocks the left and right optical paths in synchronization with the display cycle, and compares odd and even fields of the video signal displayed on the display means. a determining means for determining that the video signals in the odd field and the even field are not stereoscopic video signals when they are substantially the same; When a video signal that cannot be viewed stereoscopically is supplied, the displayed image can be viewed simultaneously with both the left and right eyes, thereby preventing image flickering. It has the excellent feature of being able to significantly reduce eye fatigue.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing a schematic configuration of a conventional stereoscopic video playback device, FIG. 2 is a front view of a shutter section used in the conventional example, and FIG. 3 is a stereoscopic video playback according to an embodiment of the present invention. FIG. 4 is a block diagram of the main parts showing the configuration of the device, and a conceptual diagram showing left and right images. 11...Television receiver, 12...Picture tube surface, 13...Shutter section, 17...Shutter phase control circuit, 19...Signal discrimination circuit.

Claims (1)

[Claims] 1. A display means that alternately displays left and right images for each field from a pair of eyepiece members provided at positions corresponding to the human eyes, through a shutter means that alternately blocks the left and right optical paths in synchronization with the display cycle. It is configured so that you can see it in 3D by looking at it.
and a determining means for comparing an odd field and an even field of a video signal displayed on the display means and determining that the video signal is not a stereoscopic video signal if the video signals in the odd field and the even field are substantially the same; and control means for controlling the shutter means to release both the left and right shutter means when the means determines that the signal is not a stereoscopic video signal.