JPH0646807B2 - Video display - Google Patents
Video displayInfo
- Publication number
- JPH0646807B2 JPH0646807B2 JP60142889A JP14288985A JPH0646807B2 JP H0646807 B2 JPH0646807 B2 JP H0646807B2 JP 60142889 A JP60142889 A JP 60142889A JP 14288985 A JP14288985 A JP 14288985A JP H0646807 B2 JPH0646807 B2 JP H0646807B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- crystal display
- backlight
- television camera
- display board
- 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 - Lifetime
Links
- 239000004973 liquid crystal related substance Substances 0.000 claims description 33
- 238000001514 detection method Methods 0.000 claims description 9
- 230000001934 delay Effects 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Closed-Circuit Television Systems (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は玄関テレビホン等に使用される液晶表示板を使
用した映像表示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 video display device using a liquid crystal display plate used for a front door TV phone or the like.
従来の技術 近年、ＨＡ（ホームオートメーション）化の傾向は目ざ
ましいものがあり、とりわけ音声情報に加え映像情報を
とり入れた製品が増加している。例えば、玄関子機にテ
レビカメラを設け、室内親機に受像管等の映像表示装置
を設けた玄関テレビホンがある。2. Description of the Related Art In recent years, there has been a remarkable trend toward HA (home automation), and in particular, the number of products incorporating video information in addition to audio information is increasing. For example, there is an entrance TV phone in which a TV camera is provided in the entrance slave and an image display device such as a picture tube is provided in the indoor master.
発明が解決しようとする問題点 従来、この玄関テレビホンは来客時にテレビカメラと受
像管の電源投入が同時に行なわれる為、テレビカメラと
受像管の回路動作が安定するまで映像が不鮮明であると
いう問題があった。Problems to be Solved by the Invention Conventionally, in this entrance TV phone, since the power of the TV camera and the picture tube is turned on at the same time when a visitor arrives, the image is unclear until the circuit operation of the TV camera and the picture tube becomes stable. was there.
本発明は上記問題点に鑑み、映像表示装置として液晶表
示板を使用した場合において、映像表示と同時に鮮明な
映像出力が得られるよう構成したものである。In view of the above problems, the present invention is configured to obtain a clear image output simultaneously with image display when a liquid crystal display plate is used as the image display device.
問題点を解決するための手段 上記課題を解決するために、本発明の映像表示装置は、
来客の呼び出しを検出する呼出検出手段と、来客を映像
を撮影するために子機側に設けられたテレビカメラと、
前記呼出検出手段により駆動されて、前記テレビカメラ
の電源を投入するテレビカメラ用の電源切換手段と、前
記テレビカメラから送信される映像を表示するための親
機に設けれた液晶表示板と、前記呼出検出手段の検出に
応じて、前記液晶表示板の電源を投入する液晶表示板用
の電源切換手段と、液晶表示板の画像を鮮明に表示する
ためのバックライトと、前記電源が投入されてからテレ
ビカメラの映像信号と液晶表示板の表示出力とが安定す
るまでの間、前記バックライトの点灯を遅延させる遅延
手段と、前記遅延後にバツクライトの電源を投入するた
めの、バックライト用電源切換手段とを有するものであ
る。Means for Solving the Problems In order to solve the above problems, the video display device of the present invention is
A call detection means for detecting the call of the visitor, a television camera provided on the side of the handset to capture an image of the visitor,
A power source switching means for the television camera, which is driven by the call detecting means and turns on the power source of the television camera, and a liquid crystal display panel provided in a master unit for displaying an image transmitted from the television camera, In response to the detection of the call detecting means, a power source switching means for the liquid crystal display panel which turns on the liquid crystal display board, a backlight for clearly displaying an image on the liquid crystal display board, and the power source is turned on. From the beginning until the video signal of the TV camera and the display output of the liquid crystal display plate are stabilized, delay means for delaying the lighting of the backlight, and a power source for the backlight for turning on the power of the backlight after the delay. And switching means.
作用 上記構成によれば液晶表示板による映像表示と同時に鮮
明な映出画線を得ることができ、動作開始時に不鮮明な
画像を見なくても良いものである。Operation According to the above configuration, a clear projected image line can be obtained at the same time as the image display on the liquid crystal display plate, and it is not necessary to see an unclear image at the start of the operation.
実施例 本発明の映像信号表示装置の一実施例を図面にもとづい
て説明する。Embodiment An embodiment of the video signal display device of the present invention will be described with reference to the drawings.
まず、玄関子機に設けられた来客用の押釦１が押された
ことが呼出検出手段２により検出されると、テレビカメ
ラ３の電源切換手段４を駆動して、テレビカメラ３の駆
動を開始するとともに、液晶表示板電源投入用の第１の
遅延手段５の動作を開始する。この第１の遅延手段５に
より、テレビカメラ３からの映像信号が安定するに充分
な一定時間ａの遅延後、第２の電源切換手段６を駆動し
て液晶表示板７の電源を投入するとともに、バックライ
ト電源投入用の第２の遅延手段８の動作を開始する。こ
のバックライト電源投入用の第２の遅延手段８により、
液晶表示板７が動作開始してから映像出力の安定に充分
な一定時間ｂの遅延後、第３の電源切換手段９を駆動し
てバックライト10の電源を投入する。First, when the call detection means 2 detects that the push button 1 for a visitor provided on the entrance cordless handset is pressed, the power source switching means 4 of the television camera 3 is driven to start driving the television camera 3. At the same time, the operation of the first delay means 5 for turning on the liquid crystal display board is started. After the first delay means 5 delays a predetermined time a sufficient for stabilizing the video signal from the television camera 3, the second power source switching means 6 is driven to turn on the liquid crystal display panel 7. , The operation of the second delay means 8 for turning on the backlight power is started. By the second delay means 8 for turning on the backlight power,
After the liquid crystal display board 7 has started to operate, and after a delay of a certain time b sufficient for stabilizing the image output, the third power supply switching means 9 is driven to power on the backlight 10.
すなわち、上述の構成によればバックライト10が点灯し
た際には、テレビカメラ３および液晶表示板７の両方が
いずれも安定な動作状態にあるため、バックライト１０
の点灯と同時に安定した良好な画像を見ることが出来る
ものである。That is, according to the above configuration, when the backlight 10 is turned on, both the television camera 3 and the liquid crystal display board 7 are in a stable operation state.
It is possible to see a stable and good image at the same time as the lighting of.
一方、終了時には終了釦１１の押圧を終了検出手段１２
が検出すると速やかにバックライト１０の電源を切断
し、かつ液晶表示板電源切断用の第３の遅延手段１３の
動作を開始する。この液晶表示板電源切断用の第３の遅
延手段１３により一定時間Ｃの遅延後、液晶表示板７の
電源を切断し、かつテレビカメラ電源切断用の第４の遅
延手段14の動作を開始する。このテレビカメラ電源切断
用の第４の遅延手段１４の出力により液晶表示板７の表
示回路動作が完全に停止するに充分な一定時間ｄ後、テ
レビカメラ３の電源を切断する。On the other hand, at the end, pressing the end button 11 causes the end detection means 12
When is detected, the backlight 10 is immediately powered off, and the operation of the third delay means 13 for powering off the liquid crystal display panel is started. After the third delay means 13 for cutting off the power supply of the liquid crystal display panel delays the constant time C, the power supply of the liquid crystal display board 7 is cut off and the operation of the fourth delaying means 14 for cutting off the power supply of the television camera is started. . The output of the fourth delay means 14 for cutting off the power supply of the television camera turns off the power supply of the television camera 3 after a predetermined time d sufficient for completely stopping the operation of the display circuit of the liquid crystal display panel 7.
なお、テレビカメラ３からの映像信号が安定するのに充
分な前記一定時間ａと液晶表示板７の表示出力が安定す
るのに充分な前記一定時間ｂと液晶表示板７の表示が完
全に停止するに充分な一定時間Ｃと液晶表示板７の表示
動作を停止するに必要な前記一定時間ｄは人間工学的な
配慮も加え、ａ＝0.5秒，ｂ＝0.3秒，ｃ＝0.3秒，ｄ＝
0.5秒として良好な結果が得られた。It should be noted that the display of the liquid crystal display panel 7 and the constant time a sufficient to stabilize the video signal from the television camera 3 and the constant time b sufficient to stabilize the display output of the liquid crystal display panel 7 are completely stopped. The fixed time C sufficient for the liquid crystal display 7 and the fixed time d required to stop the display operation of the liquid crystal display panel 7 include a = 0.5 second, b = 0.3 second, c = 0.3 second, d =
Good results were obtained at 0.5 seconds.
なお、以上の実施例においては、テレビカメラ３の動作
開始後、そのテレビカメラ３の動作が安定した後に液晶
表示板７の駆動を開始し、その液晶表示板７の動作が安
定した後にバックライト10を点灯するよう構成したが、
テレビカメラ３と液晶表示板７を同時に駆動し、その両
者の動作が安定するだけの時間遅延してバックライト１
０を点灯しても良いものである。In the above embodiment, after the operation of the television camera 3 is started, the liquid crystal display board 7 is started to be driven after the operation of the television camera 3 is stabilized, and the backlight is supplied after the operation of the liquid crystal display board 7 is stabilized. I configured to turn on 10,
The TV camera 3 and the liquid crystal display board 7 are driven at the same time, and the backlight 1 is delayed with a time sufficient to stabilize the operations of both.
0 may be turned on.
すなわち、バックライト１０の点灯によって安定に画像
が得られる状態になった後にバックライト１０を点灯す
れば良いものである。That is, it is sufficient to turn on the backlight 10 after a state where an image can be stably obtained by turning on the backlight 10.
発明の効果 以上のように本発明はバックライトの点灯を遅延するこ
とにより、バックライトの点灯と同時に鮮明な画像を瞬
間的に得ることが可能となり、来客応じて電源が投入さ
れたテレビカメラやモニタの立ち上がり時の不安定な画
像を見ることはなくなり、その効果は大きいものであ
る。As described above, according to the present invention, by delaying the lighting of the backlight, it is possible to instantaneously obtain a clear image at the same time as the lighting of the backlight. The unstable image when the monitor starts up is no longer seen, and the effect is great.
図面は本発明の映像表示装置の一実施例を示すブロック
図である。 １……呼出釦、２……呼出検出手段、３……テレビカメ
ラ、４……テレビカメラ用の電源切換手段、５……液晶
表示板電源投入用の遅延手段、６……液晶表示板用の電
源切換手段、７……液晶表示板、８……バックライト電
源投入用の遅延手段、９……バックライト用の電源切換
手段、１０……バックライト、１１……終了釦、１２…
…終了検出手段、１３……液晶表示板電源切断用の遅延
手段、１４……カメラ電源切断用の遅延手段。The drawings are block diagrams showing an embodiment of a video display device of the present invention. 1 ... call button, 2 ... call detecting means, 3 ... television camera, 4 ... power source switching means for television camera, 5 ... delaying means for turning on the liquid crystal display panel, 6 ... for liquid crystal display panel Power source switching means, 7 ... liquid crystal display plate, 8 ... delay means for turning on the backlight power source, 9 ... power source switching means for backlight, 10 ... backlight, 11 ... end button, 12 ...
... End detection means, 13 ... Delay means for turning off the liquid crystal display board, 14 ... Delay means for turning off the camera power supply.
Claims (1)
と、 来客を映像を撮影するために子機側に設けられたテレビ
カメラと、 前記呼出検出手段により駆動されて、前記テレビカメラ
の電源を投入するテレビカメラ用の電源切換手段と、 前記テレビカメラから送信される映像を表示するための
親機に設けれた液晶表示板と、 前記呼出検出手段の検出に応じて、前記液晶表示板の電
源を投入する液晶表示板用の電源切換手段と、 液晶表示板の画像を鮮明に表示するためのバックライト
と、 前記電源が投入されたテレビカメラの映像信号と液晶表
示板の表示出力とが安定するまでの間、前記バックライ
トの点灯を遅延させる遅延手段と、 前記遅延後にバックライトの電源を投入するための、バ
ックライト用電源切換手段とを有する玄関テレビホンに
おける映像表示装置。1. A call detection means for detecting a call of a visitor, a television camera provided on a child device side for photographing an image of the visitor, and a power source of the television camera driven by the call detection means. A power source switching means for the television camera to be turned on, a liquid crystal display plate provided in the master unit for displaying an image transmitted from the television camera, and a liquid crystal display board of the liquid crystal display board in response to detection by the call detection means The power supply switching means for the liquid crystal display board to turn on the power, the backlight for clearly displaying the image on the liquid crystal display board, the video signal of the TV camera which is powered on and the display output of the liquid crystal display board. An entrance TV station having a delay means for delaying the lighting of the backlight until it stabilizes, and a backlight power switching means for turning on the power of the backlight after the delay. Video display device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60142889A JPH0646807B2 (en) | 1985-06-28 | 1985-06-28 | Video display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60142889A JPH0646807B2 (en) | 1985-06-28 | 1985-06-28 | Video display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS623586A JPS623586A (en) | 1987-01-09 |
| JPH0646807B2 true JPH0646807B2 (en) | 1994-06-15 |
Family
ID=15325947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60142889A Expired - Lifetime JPH0646807B2 (en) | 1985-06-28 | 1985-06-28 | Video display |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0646807B2 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS599641A (en) * | 1982-07-08 | 1984-01-19 | Nippon Denso Co Ltd | Device for driving liquid crystal display device |
| JPS59127489A (en) * | 1983-01-11 | 1984-07-23 | Mitsubishi Electric Corp | Monitor device for residence visitor |
| JPS6054169U (en) * | 1983-09-20 | 1985-04-16 | 三洋電機株式会社 | liquid crystal display device |
-
1985
- 1985-06-28 JP JP60142889A patent/JPH0646807B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS623586A (en) | 1987-01-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |