JP3112367B2 - Video image stereoscopic device - Google Patents

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 viewing using video images, in most cases, an image projected on a display is viewed using shutter glasses. However, there were problems that the shutter flickers, the color of the glasses becomes anxious, and the eyes become tired because the scenery is covered darkly.

A display device (Head Mounted Display: HMD) which is used by being mounted on the head of a user has been proposed as disclosed in Japanese Patent Application Laid-Open No. 4-132489. In order to perform three-dimensional stereoscopic viewing using a VTR, a right-eye image and a left-eye image may be alternately arranged in an even field and an odd field of a video signal, respectively. That is, the right-eye video and the left-front video are alternately written on one video tape. In addition, in order to perform stereoscopic viewing with a head-mounted display device as described above, it is necessary to separate a video signal for a right-eye image and a video signal for a left-eye image.

In the apparatus disclosed in Japanese Patent Laid-Open No. 4-132489, a right-eye image and a left-eye image are separated, and an image whose resolution is not reduced is provided to a display of each eye by a field delay circuit.

[0005]

As described in Japanese Patent Application Laid-Open No. 63-215284, a field memory is usually used for the field delay circuit.
When a field memory is used, other processes such as AD conversion and DA conversion are required, and there is a problem that the circuit configuration is complicated. If this field delay circuit is omitted, a display to which a video signal (including a synchronizing signal) is not sent causes an unstable screen to be displayed due to a synchronization shift, giving a problem of giving a sense of incongruity.

SUMMARY OF THE INVENTION 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 apparatus capable of projecting a stable three-dimensional stereoscopic image with a simple circuit. To offer.

[0007]

According to the present invention, there is provided a display device which is mounted and mounted on a user's head and has a display corresponding to each of a left eye and a right eye, and one of an odd field and an even field. On one side, the image for the left eye,
On the other hand, a field is determined from a composite video signal in which a right-eye image is written, a field determination signal is output, and a field determination circuit that outputs a synchronization signal, and a synchronization signal from the video signal and the field determination circuit are output. And a field separation circuit provided for a display corresponding to the left eye and the right eye of the display device. The field separation circuit includes a switch for inputting a field determination signal corresponding to the left eye. Send a video signal to the display on the left eye side of the display device through the switch means on the eye side, send a synchronization signal from the field determination circuit to the display on the right eye side of the display device through the switch means on the right eye side, At the time of input of the field judgment signal corresponding to the right eye, via 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, horizontal and vertical synchronizing signals are sent to the other liquid crystal display to obtain a normal and stable screen with no synchronization shift, and It is possible to show a three-dimensional stereoscopic image without giving a user a sense of incongruity without using a memory.

[0009]

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

The display device 3 includes liquid crystal displays 3a and 3b corresponding to the left eye and the right eye, respectively. A video signal 4 is input to each of the liquid crystal displays a and 3b independently, and the video signals 4 The video can be projected. Here, the video signal 4 used in the device of the present invention is, for example, a video 3 in which a left-eye video is written in an even field and a right-eye video is written in an odd field.
Video software for 3D viewing (such as videotape,
This 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 respectively.

The field determination circuit 2 includes a horizontal / vertical decoding synchronization signal S _{1 at} the beginning of a vertical blanking period of an even field shown in FIG. 3A and a vertical blanking period of an odd field shown in FIG. Horizontal / vertical decoding synchronization signal S _{2 at} the beginning of
And the odd field is discriminated based on the difference between them. For example, an "H" is output for an even field and an "L" field determination signal 5 is output for an odd field. At the same time, a horizontal and vertical synchronization signal 6 extracted from the video signal 4 is output.

As shown in FIG. 2, a field separation circuit 1 is a two-input, one-output switchable analog electronic switch 1a, 1a.
b is provided as a switch means, and 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. , And outputs the video signal 4 on the b input side when the field determination signal 5 is “H”, and outputs the synchronization signal 6 on the a input side when the field determination signal 5 is “L”. . The other analog electronic switch 1b corresponds to the liquid crystal display 3a for the right eye, inputs the synchronization signal 6 from the field determination circuit 2 to the b input side, inputs the video signal 4 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.

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

As described above, in the apparatus of the present invention, while the video signal 4 is being sent to one of the liquid crystal displays 3a or 3b, the horizontal and vertical synchronizing signals 6 are sent to the other liquid crystal display 3b or 3a so that the out-of-synchronization is generated. It is possible to display a three-dimensional stereoscopic image without giving a normal and stable screen and giving the user a sense of incongruity.

[0015]

According to the present invention, there is provided a display device which is mounted and mounted on the head of a user and has a display corresponding to the left eye and the right eye, and a left eye for one of the odd field and the even field. A field determination circuit that determines a field from a composite video signal in which the right-eye video is written on the other side, outputs the field determination signal, and outputs a synchronization signal; A field separation circuit provided with a switch for switching and outputting a synchronization signal from the determination circuit for displays corresponding to the left eye and the right eye of the display device, wherein the field separation circuit determines a field corresponding to the left eye When a signal is input, a video signal is supplied to the display on the left eye side of the display device via the switch means on the left eye side. Send the synchronization signal from the field determination circuit to the display on the right eye side of the display device through the switch means on the right eye side, and through the switch means on the right eye side when the field determination signal corresponding to the right eye is input A video signal is sent to the display on the right eye side of the display device, and a synchronization 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. During the transmission, the horizontal and vertical synchronizing signals are sent to the other liquid crystal display to obtain a normal and stable screen without any synchronism, and a three-dimensional stereoscopic view without giving a user a sense of incongruity without using a field memory. Video and the advantage of manufacturing and cost savings because it does not use field memory. There is.

[Brief description of the drawings]

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

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

FIG. 3 is a waveform diagram for explaining field determination according to the first embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Field separation circuit 1a, 1b Analog electronic switch 2 Field judgment circuit 3 Display device 3a, 3b Liquid crystal display 4 Video signal 5 Field judgment signal 6 Synchronization signal

Claims (1)

(57) [Claims] 1. A display device mounted and mounted on a user's head and having a display corresponding to each of a left eye and a right eye, and an image for the left eye in one of an odd field and an even field. A field determination circuit that determines a field from the composite video signal in which the right-eye video is written, outputs the field determination signal, and outputs a synchronization signal, and outputs the video signal and the field determination circuit from the video signal and the field determination circuit. A field separation circuit provided with a switch means for switching and outputting a synchronization signal with respect to the display corresponding to the left eye and the right eye of the display device, respectively, wherein the field separation circuit inputs a field determination signal corresponding to the left eye. 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, 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, and the right eye of the display device is switched via the switch means on the right eye side when the field determination signal corresponding to the right eye is input. Video signal to the side display,
A video image stereoscopic device, wherein a synchronization signal from a field determination circuit is transmitted to a display on a left eye side of a display device via a switch means on a left eye side.