JPH05103282A - Personal video equipment - Google Patents

Abstract

PURPOSE:To obtain a personal video equipment by which sufficient brightness is obtained with a comparatively simple device and a very little optical source. CONSTITUTION:A spectacles-type personal video equipment 1 is constituted of a frame 2 for fixing respective parts and mounting them on a human body, a video signal receiver 3, a two-dimensional optical scanning device 4 which changes a video signal into an optical beam, synchronizes it with a horizontal synchronizing signal and a vertical synchronizing signal and obtains a deflected beam deflecting the above optical beam in the horizontal and vertical directions and an elliptic concave mirror 5 with the original point of the deflected beam of the two-dimensional scanning device 4 as one focus and with the eye of a person who watches a video as the other focus.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spectacle-type or goggle-type personal video surveillance system, which is used as a television receiver for commercial televisions, video surveillance for personal computers, artificial reality or a television receiver for teleoperation equipment. ..

[0002]

2. Description of the Related Art In a conventional electronic picture tube or liquid crystal display, a video signal is electronically converted into a planar light image.
It required complicated electronic circuits and electro-optical converters. Such a device is limited in downsizing and cannot be applied to a spectacle-type or goggle-type personal video surveillance system. Therefore, as a technique applied to such a spectacle type (including spectacle type) or goggles type personal image monitoring system, a system using a plurality of light emitting elements and a vibrating mirror (Japanese Patent Laid-Open Nos. 2-51121 and 2-51121).
42476, 2-86338, 2-100448,
2-66379) is known.

[0003]

However, the method using the vibrating mirror has the drawbacks that the signal processing becomes special and the control of the vibrating mirror becomes complicated. On the other hand, an optical two-dimensional scanning method using two rotating mirrors (see, for example, Japanese Patent Laid-Open No. 62-251715) may be applied to the personal image monitoring system, but due to light scattering on the projection surface, It has a drawback that it cannot obtain sufficient brightness and needs a bright light source. SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a personal video device which is a relatively simple device and which can obtain sufficient brightness even with a minute light source.

[0004]

In order to solve the above-mentioned problems, the picture tube circuit in the conventional television receiver by the deflection of the electron beam is a light beam two-dimensional scanning system, and the origin of the light beam is one focal point. The ellipsoidal concave mirror is placed, and the light beam is emitted and deflected toward the ellipsoidal concave mirror.

[0005]

[Function] All the light reflected by the ellipsoidal concave mirror passes through the focal point of the other ellipsoid, so if you place the ellipsoidal concave mirror and the light beam origin so that the eyes are located at that position, all the emitted light will be reflected by one eye. Since it can be sensed by, sufficient brightness can be obtained even with a minute light source. A two-dimensional image can be sufficiently viewed with only one eye, but a similar device can be prepared for the other eye to easily receive a stereoscopic image.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. First, a schematic diagram of the present invention is shown in FIG. FIG. 1 is a view of a person wearing the eyeglass-type personal imager 1 as seen from above. The eyeglass-type personal imager 1 includes a frame 2 for fixing each component and mounting it on a human body, a video signal receiving device 3 for receiving a video signal and converting it into an image signal, a horizontal synchronizing signal and a vertical synchronizing signal, and the image signal. A two-dimensional optical scanning device 4 for converting the light beam into a light beam and obtaining a deflected beam for deflecting the light beam in the horizontal and vertical directions in synchronization with the horizontal synchronizing signal and the vertical synchronizing signal; It is composed of an ellipsoidal concave mirror 5 in which the origin of the deflected beam is one focal point and the eye of the viewer is the other focal point. Although the video signal receiving device 3 is not fixed to the frame 1 in the figure, it may be fixed. The video signal receiving apparatus 3 in this example shows an example in which the input video signal has the horizontal sync signal and the vertical sync signal superimposed, but from the beginning the horizontal sync signal and the vertical sync signal are separated. It can be made possible to deal with signals. A desirable example of the two-dimensional optical scanning device 4 is, as shown in FIG.
Rotating mirror 41 and a second rotating mirror 42 having a regular polygonal reflecting surface for reflecting the reflected light from the first rotating mirror.
And a microminiature motor 43 that drives these rotating mirrors,
44 and its motor control circuits 45, 46, and a light beam generator 47 for converting an image signal into a light beam. The motor control circuits 45 and 46 synchronize the rotation of each motor by using the horizontal synchronizing signal and the vertical synchronizing signal extracted from the video signal. In this example, since it is a rotation operation, it has the effect of not transmitting unpleasant vibration to the human body as compared with the conventional vibration type, but if it is a two-dimensional scan, the conventional vibration type is used. It doesn't matter. It is also possible to provide the light beam generator 47 with three primary colors to form a color image.

FIG. 3 shows how the deflected beam emitted from the two-dimensional optical scanning device 4 advances. FIG. 3 is a side view of the ellipsoid cut along a plane passing through the two focal points A and P, and shows that the light beam emitted from the point P advances to the point A. When the light beam is scanned while changing its direction from P → M _a , P → M ₁ , P → M _b , the light beam reflected by the mirror surface becomes M _a → A, M.
_{Both 1} → A and M _b → A are reflected toward A, and when looking at the direction of the mirror with the eye at A, the virtual image of P is I _a , I
I will move to ₁ and I _b . If this scan is repeated continuously, for example, in synchronization with the horizontal synchronizing signal of the television, the horizontal image can be viewed as a virtual image. Figure 4
Is a plan view of the ellipsoid cut along a plane perpendicular to the axis connecting the two focal points A and P. When the circle N _O is cut along a plane passing through the center O of the ellipsoid, the circle N _{A, P} is the ellipsoid. Focus A, P
It is a front view at the time of cutting in the plane passing through. A, P, O
Since both are in the center of the circle, the reflected light returns to its original position. Therefore, since all the light emitted from one focus reaches the other focus, that is, the eye, sufficient brightness can be maintained with a minute light source. This leads to downsizing of the power supply device and other circuits. Further, in FIG. 1, the signal from the video receiving device 3 is commonly supplied to both the left and right two-dimensional optical scanning devices 4, but two channels are used to supply separate left and right signals to obtain a stereoscopic image. May be available.

[0008]

As described above, according to the present invention, a personal imager can be realized by a relatively simple device.
In particular, since it is an ellipsoidal concave mirror, it is possible to maintain sufficient brightness with a minute light source. Since the horizontal and vertical synchronizing signals are used as the rotating mirror synchronizing signals, a complicated video processing circuit is not required. From the above, the electric circuit and other devices can be miniaturized. Colorization is easy by using the three primary colors for the light beam. It is also possible to form a stereoscopic image by superimposing two images on the left and right. It has a remarkable effect and contributes to the improvement of its practicality.

[Brief description of drawings]

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

FIG. 2 is a diagram showing an example of a two-dimensional scanning device.

FIG. 3 is a side view taken along a plane passing through an ellipsoid and its two focal points A and P.

FIG. 4 is a plan view of an ellipsoid cut along a plane perpendicular to an axis connecting two focal points A and P.

[Explanation of symbols]

 1 Eyeglass-type personal video device 2 Frame 3 Video signal receiving device 4 Two-dimensional optical scanning device 5 Ellipsoidal concave mirror

Claims (1)

[Claims] 1. A two-dimensional optical scanning device for converting a video signal into a light beam and obtaining a deflected beam for deflecting the light beam in a horizontal direction and a vertical direction in synchronization with a horizontal synchronizing signal and a vertical synchronizing signal, and the deflection. A personal imager comprising an ellipsoidal concave mirror having the beam origin as one focus and the other focus as the eye position.