JPH05161135A - Display image pickup device - Google Patents

Abstract

PURPOSE:To mitigate the deterioration in the resolution of an image pickup pattern caused by minute division of a half mirror and to improve the picture quality in the display image pickup device in which plural minute half mirrors are combined to form a half mirror and the coincident sight is realized. CONSTITUTION:A recessed curved face 6 having a same curvature as that on the surface of a cathode ray tube of a CRT display device is formed on the rear side of a half mirror 4 comprising lots of very small half mirrors 5 and the half mirror 4 is adhered closely to the surface of the CRT display device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display / image pickup device in which a display device and an image pickup device used in a TV telephone, a TV conference system or the like are combined.

[0002]

2. Description of the Related Art In recent years, with the development of communication technologies such as image coding technology, two-way video communication such as a TV telephone and a TV conference system in which remote locations are connected by a video / audio communication network has been rapidly spread. . In the future, it is expected that a more realistic video service can be provided by enhancing the ISDN network and increasing the bandwidth of the transmission network.

FIG. 3 shows a display / imaging device currently used for two-way video communication. The image pickup device 2 is on the upper surface or the side surface of the CRT display 1, and picks up an image of the user (subject) M. However, in a device using such a device, the user M does not look at the imaging device 2 even when the imaging device 2 captures an image because he or she is looking at the CRT display 1. Therefore, there is a drawback that even if it becomes possible to transmit a highly realistic image, it becomes an unnatural conversation in which the line of sight of the interlocutors do not match.

There is a method using a semi-transparent mirror as a method of matching the line of sight of the interlocutors. Display using a semi-transparent mirror in Fig. 4.
The block diagram of an imaging device is shown. A semi-transparent mirror 3 is installed in front of the CRT display 1 with an inclination of 45 °. The image from the subject M is reflected by the semi-transparent mirror 3 and is imaged by the imaging device 2 above the semi-transparent mirror 3. As a result, CRT
It is equivalent to taking an image from the position of the display 1,
Since the line of sight of the user M is directed to the CRT display 1, the line of sight of the user M and the line of sight of the communication partner displayed on the display screen will match. However, in the configuration shown in FIG. 4, the screen size of the CRT display 1 increases and the size of the semi-transparent mirror 3 also increases. As a result, the depth d shown in the figure becomes large, and the display / imaging device itself becomes large and expensive.

Therefore, in order to construct a small-sized and inexpensive display / image pickup device which realizes line-of-sight matching, a method of constructing the semi-transparent mirror 3 by combining a plurality of small semi-transparent mirrors has been devised (Japanese Patent Application No. 2-73400). ). FIG. 5 shows a cross-sectional view of the semi-transparent mirror 4 in which the micro semi-transparent mirror 5 is combined, and FIG. 6 shows a configuration diagram of a display / imaging device in the case of using the semi-transparent mirror 4 in which the micro semi-transparent mirror 5 is combined. In the figure, θ indicates the inclination of the small semi-transparent mirror 5. In addition, 7 is a mirror. With such a configuration, as shown in the figure, part of the incident light is reflected in the angle 2θ direction. At this time, since the depth d of the minute semi-transparent mirror 5 can be reduced, the size of the display / imaging device can be reduced as compared with the conventional method of tilting the semi-transparent mirror 3.

[0006]

However, when the CRT display 1 is used as the display device, the surface of the CRT display 1 is not flat, so that the semi-transparent mirror 3 cannot be installed in close contact with the surface of the display. Therefore, the surface of the CRT display 1 and the semi-transparent mirror 4
However, the image quality of the display screen is deteriorated due to unevenness in display, color shift, moire caused by the pattern displayed with the minute semi-transparent mirror 5, and the like. Although the above-mentioned problems can be avoided by using a flat panel liquid crystal display or the like as the display device, the liquid crystal display is still expensive at present, and is not generally widely used like the CRT display 1. In order to easily and inexpensively configure a display / imaging device capable of line-of-sight matching using an existing device, it is advantageous to use the CRT display 1 as a display device, and a CRT display 1 that can be adapted to the CRT display 1 is used. Development of the transparent mirror 4 was essential.

An object of the present invention is to form a semi-transparent mirror by combining a plurality of micro-semi-transparent mirrors used in a TV telephone, a TV conference system, etc., and divide the semi-transparent mirror into minute parts in a display / imaging device that realizes line-of-sight matching. It is intended to alleviate the deterioration of the resolution of the captured image caused by the above and to improve the image quality of the captured image.

[0008]

A display / imaging device according to the present invention is a semi-transparent mirror comprising a plurality of micro semi-transparent mirrors.
The back surface of the semi-transparent mirror has a concave curved surface having exactly the same curvature as the surface of the cathode ray tube of the CRT display.

[0009]

In the present invention, the CRT display and the semi-transparent mirror can be installed in close contact with each other, and the deterioration of the image quality of the display screen can be prevented.

[0010]

1 is a sectional view of a semi-transparent mirror used in the display / imaging device of the present invention, and FIG. 2 is a block diagram of the display / imaging device of the present invention. Compared with the configuration example shown in FIG. 6, the concave curved surface 6 having a curvature matching the curvature of the cathode ray tube of the CRT display 1 is greatly different from that of the semi-transparent mirror 4. Therefore, as shown in FIG. 2, the semi-transparent mirror 4 and the CRT display 1 can be installed in close contact with each other, and moire and display deviation can be eliminated.

[0011]

As described above, according to the present invention, the back surface of the semi-transparent mirror is provided with the concave curved surface having the same curvature as the surface of the cathode ray tube of the CRT display, so that the CRT display and the semi-transparent mirror are installed in close contact with each other. Enable
It is possible to prevent the deterioration of the image quality of the display screen and to easily and inexpensively configure a display / imaging device that enables line-of-sight matching using an existing CRT display.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a semi-transparent mirror used in a display / imaging device of the present invention.

FIG. 2 is a configuration diagram of a display / imaging device of the present invention.

FIG. 3 is a configuration diagram of a conventional display / imaging device.

FIG. 4 is a configuration diagram of a display / imaging device using a normal half mirror.

FIG. 5 is a cross-sectional view of a semi-transparent mirror configured by combining a plurality of micro semi-transparent mirrors.

FIG. 6 is a configuration diagram of a display / imaging device in the case of using a semi-transparent mirror in which a plurality of micro semi-transparent mirrors are combined.

[Explanation of symbols]

 1 CRT display 2 image pickup device 3 semi-transparent mirror 4 semi-transparent mirror 5 micro semi-transparent mirror 6 concave curved surface 7 mirror

Claims (1)

[Claims] 1. A CRT display, an image pickup device, and a semi-transparent mirror composed of a large number of micro semi-transparent mirrors.
The semi-transparent mirror is installed in front of the T display, and the CR
In a display / imaging device for imaging a subject in front of a T display as a reflection image from the semi-transparent mirror by the imaging device installed around the CRT display, a concave type having the same curvature as the CRT display on the back surface of the semi-transparent mirror. A display / imaging device characterized by having a curved surface.