JPH0457160B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field 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. 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, 6b are arranged in parallel with a predetermined interval. Drive shaft 7 of drive motors 6a, 6b
Shutter discs 8a and 8b are attached to a and 7b. The shutter discs 8a, 8b are made of transparent acrylic plates, etc., and half of the shutter discs 8a, 8b have a black-painted light shielding part 9a,
9b is provided. Also, shutter disc 8
A rotational phase detection means (not shown) is provided on a and 8b, and a control circuit controls the drive motors 6a and 6b in synchronization with the display cycle of left and right images supplied to the television receiver 2. and configured to control relative rotational phase. Therefore, the left and right eyepiece members 5a, 5b, the shutter discs 8a, 8
You can see the picture tube surface 3 of the television receiver 2 in front via the shutter disc 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 above configuration, even if the video signal supplied to the television receiver is a normal video signal that cannot be viewed stereoscopically (the left and right signals are the same), the shutter disc is rotated through the eyepiece member 5. Even when viewing the image on the television receiver 2, the image flickers due to the rotation of the shutter disc, making it impossible to view the image stereoscopically, and there is a problem in that the eyes become tired if the viewer continues to view the image.

OBJECTS OF THE INVENTION An object of the present invention is to provide a stereoscopic video reproduction device that can reduce eye fatigue and reliably provide stereoscopic viewing.

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. An invisible means configured to enable stereoscopic viewing by viewing through a shutter means that blocks the image, and an invisible means for making the image displayed by the display means invisible to the naked eye, and whether the image displayed on the display means can be viewed stereoscopically. The system is equipped with a detection means for detecting whether or not stereoscopic viewing is possible, and uses an impossible means to prevent the display image from being viewed when stereoscopic viewing is not possible, thereby ensuring that stereoscopic viewing is possible when the displayed image is visible. It is possible.

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 with the left and right video signals through the pair of left and right eyepiece members 14 to display the video tube. Side 1
2 can be seen. Further, the video signal supplied to the video input terminal 15 is transmitted to the signal cutting circuit 18.
The signal is supplied to the television receiver 11 via the circuit, and is also supplied 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 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 there is a large difference, 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 stereoscopic video signal is supplied to the video input terminal 15, the signal discrimination circuit 19 determines that it is a stereoscopic video signal, and the signal cutting circuit 18
A signal can be supplied to the television receiver 11 by making it conductive. In addition, the signal cutting circuit 1
An operation switch 22 is connected to 8, and it is also possible to manually disconnect or connect the video signal.

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 signal cutting circuit 18 is connected to supply the signal to the television receiver 11. , images corresponding to the left and right eyes are alternately projected on a video tube surface 12 for each field.

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 displayed on screen 2, the right eye portion of the shutter section 13 closes, the left eye portion opens,
I can see images only with my 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 determines that the signal is not a stereoscopic video signal, and the signal cutting circuit 18 determines that the signal is not a stereoscopic video signal.
By cutting off the signal supplied to screen 1,
2. It is possible to not display the image.

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 it is not possible to view the image stereoscopically, the displayed image is made invisible. , when the displayed image is visible, it can be reliably viewed stereoscopically.

In the above embodiment, a signal discrimination circuit is used as a detection means for detecting whether or not stereoscopic viewing is possible, and the video signals of an odd field and an even field are compared and discriminated. It is also possible to superimpose a determination signal indicating that the signal is a stereoscopic video signal, and use this determination signal to determine whether or not stereoscopic viewing is possible. In addition, although we have explained the case where a signal cutting circuit is used as the invisible means, it can also be done by using the shutter part and closing both the left and right parts of the shutter that open and close corresponding to the left and right eyes. Any device can be used as long as it has the function of making the displayed image invisible to the human eye.

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. Invisible means configured to enable stereoscopic viewing by viewing through shutter means that alternately blocks left and right optical paths in synchronization with the display cycle, and invisible means for making images displayed by the display means invisible to the naked eye; The means is equipped with a detection means for detecting whether or not the displayed image can be viewed stereoscopically, and when stereoscopic viewing is not possible, the displayed image is made invisible by invisible means, so that the displayed image can be seen with the naked eye. It is said that it is possible to reliably see stereoscopic images when viewing normal video signals, and to prevent the discomfort of not being able to see stereoscopically and only the image flickering when viewing normal video signals, and to significantly reduce eye fatigue. It has excellent features.

[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, 18...Signal cutting circuit, 19...Signal discrimination circuit.

Claims (1)

[Claims] 1. By viewing a display means that alternately displays left and right images 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. invisible means configured to enable stereoscopic viewing, and for making the image displayed by the display means invisible to the naked eye; and detection means for detecting whether or not the image displayed on the display means can be viewed stereoscopically. A stereoscopic video reproduction device comprising: a stereoscopic video reproduction device in which the displayed video is made invisible by the invisible means when stereoscopic viewing is not possible.