JPH04315390A - Display/image pickup device - Google Patents
Display/image pickup deviceInfo
- Publication number
- JPH04315390A JPH04315390A JP10816191A JP10816191A JPH04315390A JP H04315390 A JPH04315390 A JP H04315390A JP 10816191 A JP10816191 A JP 10816191A JP 10816191 A JP10816191 A JP 10816191A JP H04315390 A JPH04315390 A JP H04315390A
- Authority
- JP
- Japan
- Prior art keywords
- display device
- semi
- display
- image
- transparent mirror
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000003384 imaging method Methods 0.000 claims description 44
- 238000000149 argon plasma sintering Methods 0.000 claims description 10
- 239000004973 liquid crystal related substance Substances 0.000 abstract description 4
- 230000006866 deterioration Effects 0.000 abstract description 3
- 230000002265 prevention Effects 0.000 abstract 2
- 230000000007 visual effect Effects 0.000 abstract 2
- 238000009792 diffusion process Methods 0.000 abstract 1
- 238000002310 reflectometry Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 238000004891 communication Methods 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Abstract
Description
【0001】0001
【産業上の利用分野】本発明は、TV電話やTV会議シ
ステム等に用いられる表示装置と撮像装置が組み合わさ
った表示・撮像装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display/imaging device that is a combination of a display device and an imaging device used in video telephones, video conference systems, and the like.
【0002】0002
【従来の技術】近年、画像符号化技術等の通信技術の発
展により、遠隔地間を映像・音声通信網で結んだTV電
話やTV会議システム等の双方向映像通信が急速に普及
してきている。今後は、ISDN網の充実と伝送網の高
帯域化等により、より高臨場感に溢れた映像がサービス
できることが期待されている。[Background Art] In recent years, with the development of communication technologies such as image coding technology, two-way video communications such as video telephones and video conference systems that connect remote locations using video and audio communication networks have rapidly become popular. . In the future, it is expected that with the enhancement of ISDN networks and higher bandwidth transmission networks, it will be possible to provide video services with even greater realism.
【0003】図5に現在双方向映像通信に用いられてい
る表示・撮像装置を示す。撮像装置2がCRTディスプ
レイ等の表示装置1の上面または側面にあり、使用者M
の撮像を行う。しかし、このような装置を利用するもの
は、通常の表示装置1を見ているため、撮像装置2で撮
像を行っても使用者Mは撮像装置2の方に視線を向ける
ことはない。そのため、せっかくの高臨場感溢れる映像
が送信可能となっても、対話者同士の視線が一致しない
不自然な会話になるという欠点があった。そこで、視線
一致を実現した小型で安価な表示・撮像装置を構成する
ため、微小な半透鏡を複数組み合わせて半透鏡を構成す
る方法が考案された(特願平2ー273400号参照)
。FIG. 5 shows a display/imaging device currently used for two-way video communication. The imaging device 2 is located on the top or side of the display device 1 such as a CRT display, and the user M
image. However, since those who use such a device are looking at the normal display device 1, the user M does not turn his/her line of sight toward the imaging device 2 even if the imaging device 2 captures an image. As a result, even if it becomes possible to transmit highly realistic images, there is a drawback that the conversation becomes unnatural because the interlocutors do not see each other in the same line of sight. Therefore, in order to construct a compact and inexpensive display/imaging device that achieves line-of-sight alignment, a method was devised to construct a semi-transparent mirror by combining multiple microscopic semi-transparent mirrors (see Japanese Patent Application No. 2-273400).
.
【0004】図6に微小半透鏡を組み合わせた半透鏡の
断面図、図7に微小半透鏡を複数組み合わせて半透鏡を
構成した場合の表示・撮像装置の構成図を示す。図中4
は透明基板、5は微小半透鏡であり、両者で半透鏡3が
構成されている。また、θは微小半透鏡5の傾きを、ま
た、wは幅を示している。このような構成を行うと、図
中に示したように、入射光の一部はある角度ψ方向に反
射されることになる。その際、微小半透鏡5の幅wは小
さくすることが可能なため、従来の半透鏡を傾けて設置
する方式より、表示・撮像装置の小型化が図れる。FIG. 6 shows a cross-sectional view of a semi-transparent mirror made up of a combination of micro semi-transparent mirrors, and FIG. 7 shows a configuration diagram of a display/imaging device in which a semi-transparent mirror is constructed by combining a plurality of micro semi-transparent mirrors. 4 in the diagram
5 is a transparent substrate, and 5 is a microscopic semi-transparent mirror, both of which constitute a semi-transparent mirror 3. Further, θ indicates the inclination of the micro semi-transparent mirror 5, and w indicates the width. With such a configuration, part of the incident light will be reflected in the direction of a certain angle ψ, as shown in the figure. In this case, since the width w of the micro semi-transparent mirror 5 can be made small, the display/imaging device can be made more compact than the conventional method in which the semi-transparent mirror is installed at an angle.
【0005】[0005]
【発明が解決しようとする課題】しかしながら、図6に
示したような半透鏡3を用いて撮像を行うと、反射面か
らの直接反射像の他、複数の像が撮像され、撮像画像の
画質が著しく低下するという欠点があった。このような
画質の低下を招く像は、半透鏡3の裏面で反射した多重
反射像と、半透鏡3の後方にある表示装置1に表示され
た画面に起因した像である。前者は図8に示したように
、半透鏡3の裏面で全反射した反射像で、入射角度が半
透鏡3表面での直接反射像と異なるが、撮像装置2の方
向に反射されるために撮像されてしまう。後者は撮像画
面に表示画面が直接映り込むためである。直接映り込み
がなくとも撮像画面に表示画面からの光が混入するため
、撮像画面が白ちゃけてコントラストが十分とれなくな
る。そのため、撮像画像の画質を向上させるためには、
これらの像を除去することが急務であった。[Problems to be Solved by the Invention] However, when imaging is performed using a semi-transparent mirror 3 as shown in FIG. There was a drawback that the value decreased significantly. Images that cause such a reduction in image quality are multiple reflection images reflected on the back surface of the semi-transparent mirror 3 and images caused by the screen displayed on the display device 1 located behind the semi-transparent mirror 3. As shown in FIG. 8, the former is a reflected image totally reflected on the back surface of the semi-transparent mirror 3, and although the incident angle is different from the direct reflected image on the surface of the semi-transparent mirror 3, it is reflected in the direction of the imaging device 2. The image will be taken. The latter is because the display screen is directly reflected on the imaging screen. Even if there is no direct reflection, light from the display screen mixes into the image capture screen, causing the image capture screen to become washed out and lack sufficient contrast. Therefore, in order to improve the image quality of captured images,
There was an urgent need to remove these statues.
【0006】本発明は、TV電話やTV会議システム等
に用いられる微小半透鏡を複数組み合わせて構成した半
透鏡を用いて視線一致を実現した表示・撮像装置におい
て、撮像画像に生じる多重反射像による画質の低下を防
止し、撮像画像の画質向上を目的とする。The present invention provides a display/imaging device that achieves line-of-sight alignment using a semi-transparent mirror constructed by combining a plurality of micro semi-transparent mirrors used in video telephones, TV conference systems, etc. The purpose is to prevent deterioration in image quality and improve the quality of captured images.
【0007】[0007]
【課題を解決するための手段】本発明にかかる表示・撮
像装置は、複数の微小半透鏡からなる半透鏡の裏面に反
射防止層または光散乱層を形成したものである。[Means for Solving the Problems] A display/imaging device according to the present invention has an antireflection layer or a light scattering layer formed on the back surface of a semi-transparent mirror made up of a plurality of minute semi-transparent mirrors.
【0008】[0008]
【作用】本発明においては、半透鏡の裏面における像の
反射が防止され、撮像時に現れる多重反射像の除去が行
われる。[Operation] In the present invention, reflection of the image on the back surface of the semi-transparent mirror is prevented, and multiple reflected images that appear during imaging are removed.
【0009】[0009]
(実施例1)図1に本発明の表示・撮像装置に用いる半
透鏡30の断面図を示す。図6に示した従来の半透鏡3
に比べ、裏面に反射防止層6が形成されていることが大
きく異なる。反射防止層6を多層化することにより可視
域全体にわたって反射率が低下するように調整してある
。これにより、裏面による反射光強度を大幅に低減でき
ることになる。その結果、撮像画面に現れる半透鏡3裏
面からの反射像の輝度を低下させることができるため、
撮像画面の画質を向上できる。
(実施例2)図2に本発明の表示・撮像装置に用いる半
透鏡30の他の実施例の断面図を示す。図1に比べ裏面
に光散乱層6Aが形成されていることが大きく異なる。
光散乱層6Aとしては、例えば透明基板4の裏面前面に
微小な凹凸を形成し、その凹凸により光を散乱させ、あ
る特定方向への反射を防ぐ。その結果、撮像画面に現れ
る半透鏡30の裏面からの反射像を完全に除去すること
ができる。また、本発明の表示・撮像装置の使用者は表
示画面を光の散乱層を通して見ることになるが、表示画
面の大きな画質劣化は生じない。(Embodiment 1) FIG. 1 shows a sectional view of a semi-transparent mirror 30 used in the display/imaging device of the present invention. Conventional semi-transparent mirror 3 shown in Figure 6
The main difference is that an antireflection layer 6 is formed on the back surface. By forming the antireflection layer 6 into multiple layers, the reflectance is adjusted to decrease over the entire visible range. This makes it possible to significantly reduce the intensity of reflected light from the back surface. As a result, the brightness of the reflected image from the back surface of the semi-transparent mirror 3 that appears on the imaging screen can be reduced.
The image quality of the imaging screen can be improved. (Embodiment 2) FIG. 2 shows a sectional view of another embodiment of the semi-transparent mirror 30 used in the display/imaging device of the present invention. A major difference from FIG. 1 is that a light scattering layer 6A is formed on the back surface. As the light scattering layer 6A, for example, minute irregularities are formed on the front surface of the back surface of the transparent substrate 4, and the irregularities scatter light to prevent reflection in a certain specific direction. As a result, the reflected image from the back surface of the semi-transparent mirror 30 appearing on the imaging screen can be completely removed. Furthermore, although the user of the display/imaging device of the present invention views the display screen through the light scattering layer, there is no significant deterioration in the image quality of the display screen.
【0010】さらに、表示・撮像装置の小型化を図るた
め、表示装置1に平面ディスプレイである液晶ディスプ
レイを用いる場合があるが、液晶ディスプレイには視野
角が狭いという欠点がある。しかし、半透鏡30の裏面
に光散乱層6Aを設けた場合、液晶ディスプレイに表示
された画面が任意の方向に散乱されるようになるため、
液晶ディスプレイの視野角が広がるという効果もある。
(実施例3)図3に本発明による表示・撮像装置の構成
図を示す。この実施例では、従来の表示・撮像装置と異
なり、透明基板4の裏面に反射防止膜層6または光散乱
層6Aを設けた半透鏡30を用いるとともに、表示と撮
像を時分割化するための制御装置7が新たに加わってい
る。すなわち、図4に示したようなタイミングで、撮像
を行う期間Aと表示を行う期間Bを設け、期間Aでは表
示装置1において表示を行わないか、または黒表示を行
い、これに同期させて撮像装置2で撮像を行う。期間B
では撮像は行わず、表示装置1で通常の表示を行う。こ
のような構成を行うことにより、撮像画面に表示画面が
映り込むことを防止できる。特に、実施例2のような場
合には、半透鏡30の裏面に設けた光散乱層6Aにより
散乱された光が直接撮像装置2に混入するが、本実施例
では、この散乱光を除去できるため、撮像画面の画質を
大幅に向上できる。Furthermore, in order to reduce the size of the display/imaging device, a liquid crystal display, which is a flat display, is sometimes used as the display device 1, but the liquid crystal display has the disadvantage of a narrow viewing angle. However, if the light scattering layer 6A is provided on the back surface of the semi-transparent mirror 30, the screen displayed on the liquid crystal display will be scattered in any direction.
It also has the effect of widening the viewing angle of the LCD display. (Embodiment 3) FIG. 3 shows a configuration diagram of a display/imaging device according to the present invention. Unlike conventional display/imaging devices, this embodiment uses a semi-transparent mirror 30 having an anti-reflection film layer 6 or a light scattering layer 6A on the back surface of a transparent substrate 4, and also uses a semi-transparent mirror 30 for time-sharing display and imaging. A control device 7 is newly added. That is, a period A for imaging and a period B for displaying are provided at the timing shown in FIG. The imaging device 2 performs imaging. Period B
In this case, no imaging is performed, and normal display is performed on the display device 1. By implementing such a configuration, it is possible to prevent the display screen from being reflected on the imaging screen. In particular, in the case of Example 2, the light scattered by the light scattering layer 6A provided on the back surface of the semi-transparent mirror 30 directly enters the imaging device 2, but in this example, this scattered light can be removed. Therefore, the image quality of the imaging screen can be significantly improved.
【0011】[0011]
【発明の効果】以上説明したように、本発明は複数の微
小半透鏡からなる半透鏡の裏面に反射防止層または光散
乱層を設けて像の反射を防止したので、撮像時に現れる
多重像の除去を可能にし、撮像画像の画質を向上させる
ことができる。As explained above, the present invention prevents reflection of images by providing an antireflection layer or a light scattering layer on the back surface of a semitransparent mirror made up of a plurality of microscopic semitransparent mirrors. This makes it possible to improve the image quality of the captured image.
【図1】本発明の表示・撮像装置に用いる半透鏡の一実
施例を示す断面図である。FIG. 1 is a sectional view showing an embodiment of a semi-transparent mirror used in a display/imaging device of the present invention.
【図2】本発明の表示・撮像装置に用いる半透鏡の他の
実施例を示す断面図である。FIG. 2 is a sectional view showing another embodiment of a semi-transparent mirror used in the display/imaging device of the present invention.
【図3】本発明による表示・撮像装置の構成図である。FIG. 3 is a configuration diagram of a display/imaging device according to the present invention.
【図4】本発明の表示・撮像装置の表示及び撮像のタイ
ミング図である。FIG. 4 is a timing chart of display and image capture of the display/image capture device of the present invention.
【図5】従来の表示・撮像装置の一例を示す構成図であ
る。FIG. 5 is a configuration diagram showing an example of a conventional display/imaging device.
【図6】先に提案した微小半透鏡を複数組み合わせた半
透鏡の断面図である。FIG. 6 is a cross-sectional view of a semi-transparent mirror that is a combination of a plurality of micro semi-transparent mirrors proposed previously.
【図7】先に提案した微小半透鏡を複数組み合わせて半
透鏡を構成した場合の表示・撮像装置の構成図である。FIG. 7 is a configuration diagram of a display/imaging device in which a semi-transparent mirror is constructed by combining a plurality of previously proposed micro semi-transparent mirrors.
【図8】図7の半透鏡の裏面からの反射を説明するため
の図である。8 is a diagram for explaining reflection from the back surface of the semi-transparent mirror in FIG. 7. FIG.
1 表示装置 2 撮像装置 3 半透鏡 4 透明基板 5 微小半透鏡 6 反射防止層 6A 光散乱層 7 制御装置 30 半透鏡 1 Display device 2 Imaging device 3 Semi-transparent mirror 4 Transparent substrate 5. Microscopic semi-transparent mirror 6. Anti-reflection layer 6A Light scattering layer 7 Control device 30 Semi-transparent mirror
Claims (2)
からなる半透鏡から構成され、前記表示装置の前面に前
記半透鏡を設置し、前記表示装置前方の被写体を前記半
透鏡からの反射像として前記表示装置の周囲に設置され
た前記撮像装置により撮像を行う表示・撮像装置におい
て、前記半透鏡の裏面に反射防止層を形成したことを特
徴とする表示・撮像装置。1. A display device, an imaging device, and a semi-transparent mirror including a large number of minute semi-transparent mirrors, wherein the semi-transparent mirror is installed in front of the display device, and a subject in front of the display device is reflected from the semi-transparent mirror. A display/imaging device that captures an image as an image using the imaging device installed around the display device, characterized in that an antireflection layer is formed on the back surface of the semi-transparent mirror.
からなる半透鏡から構成され、前記表示装置の前面に前
記半透鏡を設置し、前記表示装置前方の被写体を前記半
透鏡からの反射像として前記表示装置の周囲に設置され
た前記撮像装置により撮像を行う表示・撮像装置におい
て、前記半透鏡の裏面に光散乱層を形成したことを特徴
とする表示・撮像装置。2. A display device, an imaging device, and a semi-transparent mirror including a large number of minute semi-transparent mirrors, wherein the semi-transparent mirror is installed in front of the display device, and a subject in front of the display device is reflected from the semi-transparent mirror. A display/imaging device that captures an image as an image using the imaging device installed around the display device, characterized in that a light scattering layer is formed on the back surface of the semi-transparent mirror.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3108161A JP3006726B2 (en) | 1991-04-15 | 1991-04-15 | Display / imaging device |
US07/840,559 US5317405A (en) | 1991-03-08 | 1992-02-25 | Display and image capture apparatus which enables eye contact |
EP92103573A EP0503432B1 (en) | 1991-03-08 | 1992-03-02 | Display and image capture apparatus which enables eye contact |
DE69211385T DE69211385T2 (en) | 1991-03-08 | 1992-03-02 | Image capture and playback device that allows eye contact |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3108161A JP3006726B2 (en) | 1991-04-15 | 1991-04-15 | Display / imaging device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04315390A true JPH04315390A (en) | 1992-11-06 |
JP3006726B2 JP3006726B2 (en) | 2000-02-07 |
Family
ID=14477512
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3108161A Expired - Lifetime JP3006726B2 (en) | 1991-03-08 | 1991-04-15 | Display / imaging device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3006726B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5532736A (en) * | 1992-07-31 | 1996-07-02 | Nippon Telegraph And Telephone Corporation | Display and image capture apparatus |
-
1991
- 1991-04-15 JP JP3108161A patent/JP3006726B2/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5532736A (en) * | 1992-07-31 | 1996-07-02 | Nippon Telegraph And Telephone Corporation | Display and image capture apparatus |
Also Published As
Publication number | Publication date |
---|---|
JP3006726B2 (en) | 2000-02-07 |
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