JPH06233329A - Video stereoscopic device - Google Patents

Abstract

PURPOSE:To provide a video stereoscopic device which can project a stable stereoscopic image in a simple circuit constitution. CONSTITUTION:When a video signal 4 obtained through reproduction of stereoscopic video software is received, a field deciding circuit 2 decides an odd- or even-numbered field and outputs a field deciding signal 5. A field separating circuit 1 actuates an analog electronic switch based on the signal 5 and sends the signal 4 to a liquid crystal display 3a or 3b of a display device 3. Meanwhile a horizontal/vertical synchronizing signal 6 received from the circuit 2 is sent to the other one of both displays 3a and 3b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video image stereoscopic device using a display device mounted on a user's head.

[0002]

2. Description of the Related Art Conventionally, when performing three-dimensional stereoscopic vision using video images, shutter glasses are often used to view images displayed on a display. However, there was a problem that the eyes were tired because the flicker of the shutter, the color of the glasses were worrisome, and the scenery was covered in darkness.

A device using a display device (Head Mounted Display: HMD) mounted on the user's head has been proposed as disclosed in Japanese Patent Laid-Open No. 4-132489. In order to perform three-dimensional stereoscopic vision using a VTR, it is only necessary to alternately arrange the right-eye image and the left-eye image in the even and odd fields of the video signal. That is, the right eye image and the left front image are alternately written on one video tape. Further, as described above, in order to perform stereoscopic viewing with the head-mounted display device, it is necessary to separate the video signal of the right-eye image and the video signal of the left-eye image.

In the apparatus of the above-mentioned Japanese Patent Laid-Open No. 4-132489, the image for the right eye and the image for the left eye are separated and a field delay circuit is used to give an image of which resolution is not deteriorated to the display of each eye.

[0005]

By the way, it is usual to use a field memory for the above-mentioned field delay circuit as shown in Japanese Patent Laid-Open No. 63-215284.
If the field memory is used, other processes such as AD conversion and DA conversion are required, which causes a problem that the circuit configuration becomes complicated. Further, if the field delay circuit is omitted, there is a problem in that a display to which a video signal (including a synchronization signal) is not sent causes an unstable screen to appear due to the synchronization shift, which gives a feeling of strangeness.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a video image stereoscopic device capable of displaying a stable three-dimensional stereoscopic image with a simple circuit. To provide.

[0007]

According to the present invention, there is provided a display device which is mounted on a user's head and has a display corresponding to each of the left eye and the right eye, and an odd field or an even field. The image for the left eye on one side,
On the other hand, the field judgment circuit that judges the field from the composite video signal in which the image for the right eye is written and outputs the field judgment signal and outputs the synchronization signal, and the synchronization from the video signal and the field judgment circuit And a field separation circuit provided for the display corresponding to the left eye and the right eye of the display device, respectively, and a switch means for switching and outputting a signal is provided to the left when the field determination signal corresponding to the left eye is input. Sending a video signal to the display on the left eye side of the display device via the switch means on the eye side, sending a synchronization signal from the field determination circuit to the display on the right eye side of the display device via the switch means on the right eye side, When inputting the field judgment signal corresponding to the right eye, through the switch means on the right eye side Sends a video signal to the right eye of the display of the display device, is intended to send a synchronization signal from the field determination circuit on the left eye side of the display of the display device through the switching means of the left eye side.

[0008]

According to the structure of the present invention, while a video signal is being sent to one liquid crystal display, a horizontal and vertical sync signal is sent to the other liquid crystal display to form a normal and stable screen without sync deviation, and It is possible to show a three-dimensional stereoscopic image without making the user feel uncomfortable without using a memory.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the configuration of an embodiment of the present invention. In this embodiment, a field separation circuit 1 and a field determination circuit 2 for respectively inputting a composite video signal 4 and a goggle type are formed, and a user's head is formed. And a head-mounted display device 3 mounted on the.

The display device 3 includes liquid crystal displays 3a and 3b corresponding to the left eye and the right eye, respectively, and the video signal 4 is independently input to each of the liquid crystal displays a and 3b, and the respective video signals are supplied. The video can be projected. In the video signal 4 used in the device of the present invention, for example, the image for the left eye is written in the even field and the image for the right eye is written in the odd field 3
Video software for 3D viewing (eg videotape,
A video signal 4 is a composite signal obtained by reproducing a video signal recorded on a video disc, and the video signal 4 is input to the field separation circuit 1 and the field determination circuit 2.

The field determination circuit 2 uses the horizontal / vertical decoding sync signal S _{1 at} the beginning of the vertical retrace period of the even field shown in FIG. 3A and the vertical retrace period of the odd field shown in FIG. 3B. Horizontal / vertical decoding sync signal S _{2 at} the beginning of
The even-numbered field and the odd-numbered field are discriminated from each other according to the difference between the two, and for example, "H" is output in the case of the even-numbered field and "L" is determined in the case of the odd-numbered field. At the same time, the horizontal and vertical sync signals 6 extracted from the video signal 4 are output.

As shown in FIG. 2, the field separation circuit 1 is a switching type analog electronic switch 1a, 1 having two inputs and one output.
b is provided as a switch means, one analog electronic switch 1a corresponds to the liquid crystal display 3a for the left eye, the video signal 4 is input to the b input side, and the field determination circuit 2 is input to the a input side. When the field determination signal 5 is "H", the b input side video signal 4 is output, and when the field determination signal 5 is "L", the a input side synchronization signal 6 is output. . The other analog electronic switch 1b corresponds to the liquid crystal display 3a for the right eye, and the sync signal 6 from the field determination circuit 2 is input to the b input side and the video signal 4 is input to the a input side. When the field determination signal is "H", the synchronizing signal 6 on the a input side is output, and when it is "L", the video signal 4 on the b input side is output.

Thus, in the apparatus of the present invention, when the video signal 4 obtained by reproducing the video software for three-dimensional stereoscopic vision is sent, the field judgment circuit 2 judges the odd and even fields. Set the field determination signal 5 to "L" or "
In the field separation circuit 1, when the field determination signal 5 of "H" corresponding to the left eye is input, the video signal 4 is supplied to the liquid crystal for the left eye of the display device 3 through the analog electronic switch 1a for the left eye. The video signal 4 is sent to the display 3a, and the vertical and horizontal sync signals 6 are sent to the liquid crystal display 3b for the right eye of the display device 3 via the analog electronic switch 1b for the right eye. When the field determination signal 5 of "" is input, the video signal 4 is sent to the liquid crystal display 3b for the right eye of the display device 3 via the analog electronic switch 1b for the right eye, and also via the analog electronic switch 1a for the left eye. A vertical and horizontal synchronizing signal 6 is sent to the liquid crystal display 3a for the left eye of the display device 3.

In this way, in the device of the present invention, while the video signal 4 is being sent to one of the liquid crystal displays 3a and 3b, the horizontal and vertical synchronizing signals 6 are sent to the other liquid crystal display 3b and 3a so that there is no synchronization error. It is possible to display a three-dimensional stereoscopic image without giving a feeling of strangeness to the user with a normal and stable screen.

[0015]

According to the present invention, a display device which is mounted on a user's head and has a display corresponding to each of the left eye and the right eye, and the left eye in either the odd field or the even field is used. Field determination circuit that determines the field from the composite video signal in which the video for the right eye and the video for the right eye are written to the other, and outputs the field determination signal and the synchronization signal, and the video signal and the field. A field separation circuit provided with switch means for switching and outputting the synchronizing signal from the judgment circuit to the display corresponding to the left eye and the right eye of the display device, and the field separation circuit determines the field judgment corresponding to the left eye. When a signal is input, a video signal is sent to the display on the left eye side of the display device via the switch means on the left eye side. Sending, sending a synchronization signal from the field determination circuit to the display on the right eye side of the display device via the switch means on the right eye side, via the switch means on the right eye side when the field determination signal corresponding to the right eye is input The video signal is sent to the display on the right eye side of the display device, and the synchronizing signal from the field determination circuit is sent to the display on the left eye side of the display device via the switch means on the left eye side. While sending, the horizontal and vertical sync signals are sent to the other liquid crystal display to create a normal and stable screen with no sync shift, and without the use of a field memory, the user can feel a sense of discomfort in 3D stereoscopic viewing. Can be displayed, and because no field memory is used, it is advantageous in terms of manufacturing and cost. There is.

[Brief description of drawings]

FIG. 1 is a circuit configuration diagram of an embodiment of the present invention.

FIG. 2 is a circuit configuration diagram of a field separation circuit used in the above.

FIG. 3 is an explanatory waveform diagram for field determination of the above.

[Explanation of symbols]

 1 field separation circuit 1a, 1b analog electronic switch 2 field determination circuit 3 display device 3a, 3b liquid crystal display 4 video signal 5 field determination signal 6 sync signal

Claims (1)

[Claims] 1. A display device, which is mounted on a user's head and has a display corresponding to each of the left eye and the right eye, and an image for the left eye in one of an odd field and an even field. , The field determination circuit that determines the field from the composite video signal in which the image for the right eye is written and outputs the field determination signal, and the synchronization signal is output from the video signal and the field determination circuit. A field separation circuit provided for the display corresponding to the left eye and the right eye of the display device, respectively, and a switch means for switching and outputting the synchronization signal is provided, and in the field separation circuit, when the field determination signal corresponding to the left eye is input. The video signal is sent to the display on the left eye side of the display device via the switch means on the left eye side, The synchronization signal from the field determination circuit is sent to the display on the right eye side of the display device via the switch means of the display device, and when the field determination signal corresponding to the right eye is input, the right eye of the display device is sent via the switch means on the right eye side. Send the video signal to the side display,
A video image stereoscopic device, wherein a synchronization signal from a field determination circuit is sent to a display on the left eye side of a display device via a switch means on the left eye side.