JP2648168B2 - TV camera coaxial screen display - Google Patents

TV camera coaxial screen display

Info

Publication number
JP2648168B2
JP2648168B2 JP11768888A JP11768888A JP2648168B2 JP 2648168 B2 JP2648168 B2 JP 2648168B2 JP 11768888 A JP11768888 A JP 11768888A JP 11768888 A JP11768888 A JP 11768888A JP 2648168 B2 JP2648168 B2 JP 2648168B2
Authority
JP
Japan
Prior art keywords
screen display
liquid crystal
camera
television camera
half 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.)
Expired - Fee Related
Application number
JP11768888A
Other languages
Japanese (ja)
Other versions
JPH01288082A (en
Inventor
良平 星野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP11768888A priority Critical patent/JP2648168B2/en
Publication of JPH01288082A publication Critical patent/JPH01288082A/en
Application granted granted Critical
Publication of JP2648168B2 publication Critical patent/JP2648168B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Description

【発明の詳細な説明】 (発明の属する技術分野) 本発明は、主に小型画面方式テレビ電話機に用いられ
る画面表示器に関する。
Description: TECHNICAL FIELD The present invention relates to a screen display mainly used for a small-screen videophone.

(従来の技術) 現在、市販品のテレビ電話機においては、利用者は相
手と通話する際、小型画面表示器に向いて行なってお
り、離れた位置にあるテレビカメラの方向を見ていない
のが一般的である。このため、利用者と相手とは夫々の
視線が一致していない状態で行なわれるという違和感が
あった。
(Prior Art) Currently, in commercial videophones, when talking to the other party, the user is facing the small screen display, and does not look at the direction of the remote TV camera. General. For this reason, there is a sense of incongruity that the user and the partner are performed in a state where their eyes do not match.

このような違和感をなくすため、例えば第3図に示す
構成のテレビカメラ同軸型画面表示器がある。これは、
保護ガラス1を介してハーフミラー2を小型画面表示器
3の光学的中心軸線4上に設置し、一方、この光学的中
心軸線と直角方向に反射光軸線11とテレビカメラ6の画
像入力中心軸とが一致するようにレンズ5を介してテレ
ビカメラ6を設置し、ハーフミラーを介して相手の視線
との一致をはかったものがある。
In order to eliminate such discomfort, there is, for example, a television camera coaxial screen display having the configuration shown in FIG. this is,
The half mirror 2 is set on the optical center axis 4 of the small screen display 3 via the protective glass 1, while the reflected light axis 11 and the image input center axis of the television camera 6 are perpendicular to the optical center axis. In some cases, the television camera 6 is set via the lens 5 so that the line of sight coincides with the line of sight, and the line of sight of the television camera 6 is matched via the half mirror.

しかし、この構成によると、小型画面表示器3から放
出された映像光線がハーフミラー2,保護ガラス1等によ
り乱反射を起こし、それがテレビカメラ6に取り込まれ
るため、映像信号自体もあまり鮮明でなく、さらに、利
用者にとってハーフミラー5を介してテレビカメラが薄
く見えてしまうという欠点があった。
However, according to this configuration, the image light rays emitted from the small screen display 3 cause irregular reflection by the half mirror 2, the protective glass 1, etc., and are captured by the television camera 6, so that the image signal itself is not very sharp. Further, there is a disadvantage that the television camera appears thin to the user via the half mirror 5.

(発明の目的) 本発明は、テレビカメラからの映像信号を鮮明にし、
利用者に対しテレビカメラを意識しないようにし、かつ
利用者と相手の視線との角度を一致させることを目的と
するものである。
(Object of the Invention) The present invention clarifies a video signal from a television camera,
It is an object of the present invention to make the user unaware of the television camera and to match the angle between the user and the line of sight of the other party.

(発明の構成) (発明の特徴と従来技術との差異) 本発明は、上記目的を達成するため、画面表示側とテ
レビカメラ側とに夫々設置された液晶シャッターをテレ
ビカメラ信号の垂直同期信号に同期させて交互に開閉さ
せることを最も主要な特徴とする。
(Constitution of the Invention) (Differences between the features of the invention and the prior art) In order to achieve the above object, the present invention provides a liquid crystal shutter provided on each of a screen display side and a television camera side by using a vertical synchronization signal of a television camera signal. The most important feature is to open and close alternately in synchronization with.

従来の技術は、単に画面表示器の光学的中心軸線上に
配置したハーフミラーを介して直角方向にテレビカメラ
を配置したものとは構成を異にする。
The prior art differs from the one in which a television camera is arranged in a right angle direction via a half mirror simply arranged on the optical center axis of the screen display.

(実施例) 第1図は本発明の一実施例の構成図を示し、図に示す
ように、利用者(人物)側にハーフミラー2、その小型
画面表示器3側に第一の液晶シャッター7を設置し、テ
レビカメラ6とハーフミラー2との間のレンズ5の前面
に第2の液晶シャッター8を設置したものである。
(Embodiment) FIG. 1 shows a configuration diagram of an embodiment of the present invention. As shown in FIG. 1, a half mirror 2 is provided on the user (person) side, and a first liquid crystal shutter is provided on the small screen display 3 side. 7 is provided, and a second liquid crystal shutter 8 is provided in front of the lens 5 between the television camera 6 and the half mirror 2.

そして、これら2つの液晶シャッター7と8は、第2
図の開閉動作タイミングチャートに示すようにテレビ信
号の垂直同期信号(1)に同期して、第1,第2の各液晶
シャッター7と8を第2図(2),(3)の通り一定の
タイミングで交互に開閉する。
And, these two liquid crystal shutters 7 and 8
As shown in the opening / closing operation timing chart, the first and second liquid crystal shutters 7 and 8 are kept constant as shown in FIGS. 2 (2) and (3) in synchronization with the vertical synchronization signal (1) of the television signal. Open and close alternately at the timing of.

これを動作させるには、垂直走査期間{第2図(1)
の(A)}に第1の液晶シャッター7を開き、小型画面
表示器3からの光を方向9へ行くようにして、利用者が
小型画面表示器3からの映像を見えるようにする。ま
た、その時間において、第2の液晶シャッター8を閉じ
るようにして、保護ガラス1,ハーフミラー2で乱反射さ
れた光がレンズ5,テレビカメラ6に行かないようにして
映像を鮮明にする。
In order to operate this, the vertical scanning period {FIG. 2 (1)}
(A) The first liquid crystal shutter 7 is opened to allow the light from the small screen display 3 to go in the direction 9 so that the user can see the image from the small screen display 3. Further, at that time, the second liquid crystal shutter 8 is closed, so that the light irregularly reflected by the protective glass 1 and the half mirror 2 does not go to the lens 5 and the television camera 6 to sharpen the image.

次に、垂直帰線期間{第2図(1)の(B)}に第1
の液晶シャッター7を閉じ、第2の液晶シャッター8を
開き、方向10の光をハーフミラー2で効率よく反射さ
せ、レンズ5,テレビカメラ6の方向へ行くようにして映
像信号を取り出す。このように垂直帰線期間内に映像を
映すため、テレビカメラが外部より見えにくい。即ち、
利用者がテレビカメラを意識し得ないようにした。
Next, the vertical blanking period {(B) in FIG.
The liquid crystal shutter 7 is closed, the second liquid crystal shutter 8 is opened, the light in the direction 10 is efficiently reflected by the half mirror 2, and the video signal is taken out toward the lens 5 and the television camera 6. Since the image is displayed during the vertical retrace period, the television camera is hard to see from the outside. That is,
Prevented users from being aware of TV cameras.

(発明の効果) 以上説明したように、本発明は、2つの液晶シャッタ
ーをテレビ信号の垂直同期信号に同期させて交互に開閉
させ光の制御を行なうことにより、画面表示器から放射
された光の乱反射が防止されるため、映像信号が鮮明と
なる。また、テレビカメラを外部より見ることができな
いため、利用者にとってテレビカメラを意識することな
くテレビ電話を利用することができる。さらに、構成が
同軸型のため、利用者は相手との視線が一致し、違和感
のないテレビ電話ができるという利点がある。
(Effects of the Invention) As described above, the present invention controls the light by opening and closing the two liquid crystal shutters alternately in synchronization with the vertical synchronization signal of the television signal, thereby controlling the light emitted from the screen display. Since the irregular reflection of light is prevented, the video signal becomes clear. In addition, since the video camera cannot be viewed from the outside, the user can use the videophone without being conscious of the video camera. Furthermore, since the configuration is coaxial, there is an advantage that the user can see the other party's line of sight and can make a videophone without any discomfort.

【図面の簡単な説明】[Brief description of the drawings]

第1図は本発明の一実施例による構成図、第2図は液晶
シャッターの開閉動作タイミングチャート、第3図は従
来のテレビカメラ同軸型画面表示器の構成例図である。 1……保護ガラス、2……ハーフミラー、3……小型画
面表示器、4……光学的中心軸線、5……レンズ、6…
…テレビカメラ、7……第1の液晶シャッター、8……
第2の液晶シャッター、9,10……光の方向、11……反射
光軸線。
FIG. 1 is a configuration diagram according to one embodiment of the present invention, FIG. 2 is a timing chart of opening and closing operations of a liquid crystal shutter, and FIG. 3 is a configuration example diagram of a conventional television camera coaxial screen display. 1 ... protective glass, 2 ... half mirror, 3 ... small screen display, 4 ... optical center axis, 5 ... lens, 6 ...
... TV camera, 7 ... First liquid crystal shutter, 8 ...
Second liquid crystal shutter, 9,10 ... light direction, 11 ... reflection optical axis.

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】ディスプレイを真正面から見る人物の目の
位置と画面表示面とを結ぶ光学的中心軸線上、人物側に
ハーフミラー、その画面表示面側に第1の液晶シャッタ
ーを設置し、テレビカメラと前記ハーフミラーとの間に
第2の液晶シャッターを設置し、これら2つの液晶シャ
ッターをテレビ信号の垂直同期信号に同期させて交互に
開閉させることを特徴とするテレビカメラ同軸型画面表
示器。
1. A television having a half mirror on a person side and a first liquid crystal shutter on a screen display surface side on an optical center axis connecting a position of a person's eyes and a screen display surface when the display is viewed from the front. A coaxial screen display for a television camera, wherein a second liquid crystal shutter is provided between a camera and the half mirror, and the two liquid crystal shutters are alternately opened and closed in synchronization with a vertical synchronization signal of a television signal. .
JP11768888A 1988-05-14 1988-05-14 TV camera coaxial screen display Expired - Fee Related JP2648168B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11768888A JP2648168B2 (en) 1988-05-14 1988-05-14 TV camera coaxial screen display

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11768888A JP2648168B2 (en) 1988-05-14 1988-05-14 TV camera coaxial screen display

Publications (2)

Publication Number Publication Date
JPH01288082A JPH01288082A (en) 1989-11-20
JP2648168B2 true JP2648168B2 (en) 1997-08-27

Family

ID=14717835

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11768888A Expired - Fee Related JP2648168B2 (en) 1988-05-14 1988-05-14 TV camera coaxial screen display

Country Status (1)

Country Link
JP (1) JP2648168B2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5282027A (en) * 1990-04-27 1994-01-25 U.S. Philips Corporation Image projection display and pick-up apparatus with optical shutter
JPH0411484A (en) * 1990-04-27 1992-01-16 Nippon Philips Kk Picture display/image pickup device
WO1992014338A1 (en) * 1991-02-04 1992-08-20 The Walt Disney Company Visual communication device
JP5560668B2 (en) * 2009-11-16 2014-07-30 日本電気株式会社 Camera system

Also Published As

Publication number Publication date
JPH01288082A (en) 1989-11-20

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