JP2859417B2 - Display / imaging device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display / imaging device in which a display device and an imaging device used for a videophone or a video conference system are combined.

[Conventional technology]

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 video telephone and a video conference system connecting remote locations via a video / audio communication network has been rapidly spreading. In the future, the enhancement of ISDN networks and the increase in bandwidth of transmission networks are expected to provide more realistic video services.

FIG. 6 shows the display / display currently used for two-way video communication.
1 shows an imaging device. The imaging device 3 is provided on the upper surface or the side surface of the display device 1 such as a CRT display, and captures an image of the user M. However, since a person using such a device looks at the normal display device 1, the user M does not look at the image capturing device 3 even if the image is captured by the image capturing device 3. For this reason, there has been a drawback in that even if it is possible to transmit a video full of a high sense of reality, the conversation between the interlocutors is unnatural because their eyes do not match.

There is a method using a semi-transparent mirror as a method for matching the eyes of the interlocutors. FIG. 7 shows a configuration diagram of a display / imaging device using a semi-transparent mirror. A semi-transparent mirror 2 is installed in front of the display device 1. The subject, that is, the image from the user M is reflected by the semi-transparent mirror 2 and is imaged by the imaging device 3 above the semi-transparent mirror 2, which is equivalent to being imaged from the position of the display device 1. As a result, since the line of sight of the user M is directed to the display device 1, the line of sight of the caller matches the line of sight of the other party displayed on the display screen.

However, in the configuration shown in FIG.
As the screen size increases, the size of the semi-transparent mirror 2 also increases. Therefore, the depth d shown in the figure
However, there is a disadvantage that the display / imaging device itself becomes large. Further, it is indispensable to use an expensive wide-angle lens for the image pickup device 3, and there is a disadvantage that the price of the display / image pickup device itself becomes high.

[Problems to be solved by the invention]

As described above, the conventional display / imaging apparatus has a problem that the lines of sight of the interlocutors do not coincide with each other, and those having the same line of sight have a problem of being large and expensive.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a display / imaging apparatus which is small and in which the eyes of the interlocutors coincide with each other.

[Means for solving the problem]

The display / imaging device according to the present invention is configured such that a semi-transparent mirror is formed by combining a plurality of micro semi-transparent mirrors.

[Action]

In the present invention, since the semi-transparent mirror disposed on the front surface of the display device is configured by combining a plurality of micro semi-transparent mirrors, a large space required for tilting a large semi-transparent mirror as in the related art becomes unnecessary. The whole is downsized.

〔Example〕

FIG. 1 is a sectional view of an embodiment of a semi-transparent mirror 2A used for a display / image pickup apparatus according to the present invention. The semi-transparent mirror 2A is constituted by a combination of a plurality of micro semi-transparent mirrors 21. In the drawing, θ indicates the inclination of the micro semi-transparent mirror 21. With such a configuration, a part of the incident light is reflected in a certain angle ψ direction as shown in the figure. At this time, since the width w of the micro semi-transparent mirror 21 can be reduced, the above-described depth d can be reduced. In addition, the size of the micro semi-transparent mirror 21 is
For example, it can be about a pixel, not only a strip shape,
As described later, the shape may be a matrix shape or a concentric shape.

In the embodiment shown in FIG. 1, it can be said that the semi-transparent mirror 2 in FIG. 7 is finely divided and rearranged. for that reason,
If the areas of the regions for reflecting the light from the subject are made completely equal, the image taken by the imaging device 3 is the same as when one semi-transparent mirror 2 is used, and the semi-transparent mirror having such a configuration is used. Even if 2A is used, the image quality does not deteriorate.

FIG. 2 shows another embodiment of the present invention. In FIG. 1, a plurality of micro semi-transparent mirrors 21 are combined. In this embodiment, a surface is processed on a transparent substrate 22 such as glass so as to have a shape as shown in FIG. By performing the coating of the above, it means that a plurality of micro semi-transparent mirrors 21 have been integrated,
The same effect as the configuration shown in FIG. 1 can be obtained. Unlike the embodiment shown in FIG. 1, the semi-transparent mirror 2B which has been integrally formed does not require the positioning of the individual micro semi-transparent mirrors 21.
There is a great advantage that the configuration is easy.

Further, since the relationship of ψ = 2θ holds between the reflection angle ψ and the inclination θ of the micro-semi-transparent mirror (the same applies to the case of the micro-semi-transparent mirror film 23), the shape of the micro-semi-transparent mirror 21, that is The semi-transparent mirrors 2A and 2 in FIGS.
The direction of the light reflected by B, that is, the reflection angle ψ can be arbitrarily changed.

3 and 4 show still another embodiment of the present invention. The semi-transparent mirror 2A (2B) is formed by changing the inclination θ of the micro-translucent mirror 21 without making it constant, and arranging the micro-translucent mirrors 21 in a matrix in the vertical and horizontal directions as shown in FIG. 3 (a). In this case, the micro semi-transparent mirrors 21 having the same inclination are arranged on the same line. In FIG. 3 (b), a micro semi-transparent mirror having the same inclination
This is an example in which 21 are arranged concentrically so as to form the surface shape of a so-called Fresnel lens.

FIGS. 4 (a) and 4 (b) show A in FIGS. 3 (a) and 3 (b).
FIG. 4 (a) is an enlarged cross-sectional view taken along the line A, in which the inclination θ (see FIG. 2) increases as going upward in the drawing;
FIG. 4B shows an example in which the inclination θ decreases. With such a configuration, reflected light can be collected. In particular, in the case of FIG.
There is an advantage that a reflected image can be collected at one point.

FIG. 5 shows an embodiment of a display / image pickup apparatus using the semi-transparent mirror 2A (2B) shown in FIGS. A semi-transparent mirror 2A (2B) is installed in front of the display device 1, and an imaging device 3 is installed above the semi-transparent mirror 2A. The semi-transparent mirror 2A reflects the incident light in a direction of a certain reflection angle ψ, and the imaging device 3 captures the reflected image. Unlike the case of the conventional example in FIG. 7, the semi-transparent mirror 2A can be arranged in parallel with the display surface of the display device 1, so that the depth d can be greatly reduced as compared with the case of FIG. Is possible. In FIG. 7, the image pickup device 3 is arranged above the display device 1. However, by appropriately determining the arrangement or shape of the micro-semi-transparent mirror 21, the image pickup device 3 can be arranged below or right and left. Further, when the semi-transmissive mirror 2A (2B) having the configuration as shown in FIGS. 3A and 3B is used in the present embodiment, the imaging device 3 does not need to perform imaging using an expensive wide-angle lens. is there.

FIGS. 1 to 4 show an example in which the size of the micro-semi-reflective mirror 21 or the micro-semi-transparent mirror film 23 is arranged to be constant, but the above-described imaging is possible without making the size constant. is there.
Furthermore, by keeping the size constant, the micro semi-transparent mirror 21
Alternatively, deterioration in display quality of the display device 1 such as moire caused by periodically arranging the micro semi-transparent mirror films 23 can be prevented.

The present invention can be applied not only to a display device using a CRT but also to a display device using a liquid crystal panel.

In addition, since the reflected images from the semi-transmissive mirrors 2A and 2B are captured, the captured images are horizontally inverted, but a display device capable of performing an electrical process on the video signal and displaying the images horizontally inverted is used. It is self-evident that the image is reflected by the mirror again and the image can be resolved from the left-right reversal phenomenon. Further, although the imaging device 3 is installed above the display device 1 in FIG. 5, the imaging device 3 can be installed below, right and left of the display device 1 by changing the arrangement of the micro-semi-transparent mirror 21. Needless to say.

〔The invention's effect〕

As described above, since the semi-transmissive mirror used in the display / imaging device of the present invention is constituted by a combination of a plurality of micro semi-transparent mirrors, there is an advantage that the size of the device can be easily reduced. further,
If the position of the image pickup device is changed by adding the semi-transparent mirror of the present invention, there is also an advantage that the conventional display / image pickup device can be used.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing one embodiment of a semi-transparent mirror used in a display / imaging apparatus according to the present invention, FIG. 2 is a cross-sectional view showing another embodiment of a semi-transparent mirror used in a display / imaging apparatus according to the present invention,
FIGS. 3 (a), (b), 4 (a), (b) are schematic views showing still another embodiment of a semi-transparent mirror used in the display / image pickup apparatus according to the present invention, and FIG. Embodiment of display / imaging apparatus using micro semi-transparent mirror according to the present invention, sixth embodiment
FIG. 7 shows an embodiment of a conventional display / imaging apparatus, and FIG. 7 shows an example of a display / imaging apparatus using a semi-transparent mirror. In the figure, 1 is a display device, 2A and 2B are semi-transparent mirrors, 3 is an imaging device, 2
1 is a micro semi-transparent mirror, and 23 is a micro semi-transparent mirror film.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hideki Nakajima 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (72) Inventor Shiro Suyama 1-16-1 Uchisaiwaicho, Chiyoda-ku, Tokyo Japan Telegraph and Telephone Co., Ltd. (58) Fields surveyed (Int.Cl. ⁶ , DB name) H04N 7 / 10,7 / 14-7 / 173,7 / 20-7/22

Claims (1)

(57) [Claims] A display device, an imaging device, and a semi-transparent mirror, wherein a semi-transparent mirror is provided in front of the display device, and a subject in front of the display device is provided around the display device as a reflection image from the semi-transparent mirror. A display / imaging device for performing imaging by the installed imaging device, wherein the semi-transparent mirror is configured by a combination of a plurality of micro semi-transparent mirrors.