JPS633571A - Video camera - Google Patents
Video cameraInfo
- Publication number
- JPS633571A JPS633571A JP61144809A JP14480986A JPS633571A JP S633571 A JPS633571 A JP S633571A JP 61144809 A JP61144809 A JP 61144809A JP 14480986 A JP14480986 A JP 14480986A JP S633571 A JPS633571 A JP S633571A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- voltage signal
- video camera
- video
- timer
- 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.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims abstract description 17
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 229930091051 Arenine Natural products 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
て産業上の利用分野〕
本発明はビデオカメラに係り、特にオートフォーカス装
置を有するビデオカメラの低消費電力化および部品の長
寿命化を図るのに好適なビデオカメラに関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a video camera, and more particularly to a video camera suitable for reducing power consumption and extending the life of parts of a video camera having an autofocus device. .
従来から、ビデオカメラにおいては、被写体の動きに応
じて自動的にピント合わせを行なうオートフォーカス装
置を有するものがある。そして、このようなビデオカメ
ラは、例えば銀行のキャッシェカード機等の付近に設置
される監視用ビデオカメラとしては、その監視目的を図
る上で効果的であるとされる。2. Description of the Related Art Conventionally, some video cameras have an autofocus device that automatically focuses according to the movement of a subject. Such a video camera is said to be effective as a surveillance video camera installed near a cash card machine in a bank, for example, for the purpose of surveillance.
また、従来から、前記の監視用ビデオカメラ等)ま、被
写体すなわち人等の存否にかかわらず、常74動作状態
、使ヨ、ゎう。が一般的であ9つ。Furthermore, conventionally, video cameras (such as the above-mentioned surveillance video cameras) are always in a 74-operation state, regardless of the presence or absence of a subject, ie, a person. There are nine common ones.
なお、ビデオカメラのオートフォーカス装置については
、特開昭59−127482号公報などに記載されてい
る。Note that an autofocus device for a video camera is described in Japanese Patent Application Laid-Open No. 127482/1982.
−従来技術は、前記したように、人等の被写体の存否に
かかわらず、ビデオカメラを常に動作状態(連成状態)
で使用している為に、無、駄な電力を消費し、また部品
の寿命を短mさせるという問題点があった。- As mentioned above, in the conventional technology, the video camera is always in an operating state (coupled state) regardless of the presence or absence of a subject such as a person.
However, since they are used in large quantities, there are problems in that they consume unnecessary power and shorten the lifespan of parts.
本発明の目的は、前記した従来技術の欠点をなくする為
に、被写体が動(場合にのみビデオカメラ本体、すなわ
ちビデオカメラの映像回路を予定時間動作させるように
したビデオカメラを提供することにある。SUMMARY OF THE INVENTION In order to eliminate the drawbacks of the prior art described above, an object of the present invention is to provide a video camera in which the video camera body, that is, the video circuit of the video camera, is operated for a predetermined time only when the subject is moving. be.
上記目的は、オートフォーカス装置を常に動作状態とし
ておくことによって、該オートフォーカス装置で生ずる
被写体の動きに応答した信号を検出し、該検出信号に基
づいてビデオカメラの映像回路を予定時間動作状態にす
ることにより、達成される。The above purpose is to keep the autofocus device in an operating state at all times, detect a signal that responds to the movement of a subject that occurs in the autofocus device, and keep the video circuit of the video camera in an operating state for a scheduled time based on the detection signal. This is achieved by doing so.
オートフォーカス装置は、被写体の動きに応じてビデオ
カメラのレンズのピントを合わせる為に、オートフォー
カスモータを動作させる。そこで、このオートフォーカ
スモータを動作させる信号を検出し、該検出信号に基づ
いてビデオカメラの映像回路を制御するようにする。す
なわち、被写体が動(場合には、その旨を示す検出信号
に応じて前記映像回路を予定時間動作状態とし、それ以
外の場合には前記映像回路を非動作状態とする。The autofocus device operates an autofocus motor to focus the lens of the video camera according to the movement of the subject. Therefore, a signal for operating the autofocus motor is detected, and the video circuit of the video camera is controlled based on the detected signal. That is, if the subject is moving, the video circuit is set in an operating state for a scheduled time in response to a detection signal indicating this, and in other cases, the video circuit is set in an inactive state.
この結果、無駄な′電力消費を低減できると共に部品の
長寿命化?実現することができる。As a result, it is possible to reduce unnecessary power consumption and extend the life of parts. It can be realized.
以下に、図面を参照して本発明の詳細な説明する。 The present invention will be described in detail below with reference to the drawings.
第1図は本発明の一実施例を示すブロック図である。FIG. 1 is a block diagram showing one embodiment of the present invention.
同図において、オートフォーカス回路1は、被写体の動
きに応じた電圧信号を出力する。オートフォーカスモー
タ2は、前記電圧信号に応じて時計方向または反時計方
向に回転することによって、ビデオカメラのレンズ3の
ピントを被写体に合わせる。モータ駆動検出回路4は、
前記オートフォーカスモータ2が回転したかどうか、す
なわち該モータ2の両端に電位差が生じたかどうか判定
し、電位差が生じた時には電源制御回路7にその旨の信
号(例えば5vの電圧信号)を供給する。In the figure, an autofocus circuit 1 outputs a voltage signal according to the movement of the subject. The autofocus motor 2 focuses the lens 3 of the video camera on the subject by rotating clockwise or counterclockwise in accordance with the voltage signal. The motor drive detection circuit 4 is
It is determined whether the autofocus motor 2 has rotated, that is, whether a potential difference has occurred between both ends of the motor 2, and when a potential difference has occurred, a signal to that effect (for example, a 5V voltage signal) is supplied to the power supply control circuit 7. .
なお、このモータ駆動検出回路4は、マイクロコンヒー
ータで構成されており、前記モータ2の両端に電位差が
生じてオートフォーカスが動作した時から、予定の時間
ビタイマで計数し、この予定時間中は前記5vの電圧信
号を電源制御回路7へ供給する。また前記予定時間が経
過した時にレミ再度、前記モータ2の両端の電位差が生
じ【いるかどうかを判定し、該電位差が生じていなけれ
ば前記5vの電圧信号の出力を停止する。−方、電位差
が生じている場合には前記5Vの電圧信号を、再びタイ
マで計数する予定時間が経過するまで継続して出力する
。The motor drive detection circuit 4 is composed of a microconductor heater, and counts a scheduled time with a bit timer from when a potential difference is generated between both ends of the motor 2 and autofocus is activated, and calculates the scheduled time. During this time, the 5V voltage signal is supplied to the power supply control circuit 7. Further, when the scheduled time has elapsed, Remi again determines whether or not a potential difference exists between both ends of the motor 2, and if the potential difference does not occur, the output of the 5V voltage signal is stopped. - On the other hand, if a potential difference occurs, the 5V voltage signal is continuously outputted until the scheduled time counted by the timer elapses again.
電源制御回路7は、前記モータ駆動検出回路4かもの5
Vの電圧信号に応じてビデオカメラの映像回路5を動作
状態にする。なお、本実施例で誓ミオートフォーカスの
動作とほぼ同時に、前記映像回路5が動作状態になるの
で、この時の映像信号の豆上りを早(する為に、映像回
路5における撮像は、固体撮像素子6を用いて行なうよ
うにしている。The power supply control circuit 7 includes the motor drive detection circuit 4 and the motor drive detection circuit 5.
The video circuit 5 of the video camera is put into operation in response to the V voltage signal. In this embodiment, the video circuit 5 enters the operating state almost simultaneously with the autofocus operation, so in order to quickly obtain the video signal at this time, the imaging in the video circuit 5 is performed using a solid state. This is done using an image sensor 6.
ここで、本実施例の動作について説明する。Here, the operation of this embodiment will be explained.
オートフォーカス回路1が被写体の動きに応じた戒圧信
号乞出力すると、該電圧信号、すなわちオートフォーカ
スモータ2の両端の電位差は、モータ駆動・演出回路4
において・演出される。モータ駆動検出回路4は、前記
モータ2の両端の電位差の検出に応じて、タイマの計数
ケ開始すると共に、該タイマがカウントアツプする予定
時間が経過するまで、5Vの電圧1ぎ号を電源制御回路
7へ供給する。電源制御回路7は、前記5Vの電圧信号
が供!@されている期間、映像回路5を動作状態にする
。When the autofocus circuit 1 outputs a pressure signal according to the movement of the subject, the voltage signal, that is, the potential difference between both ends of the autofocus motor 2, is transmitted to the motor drive/direction circuit 4.
It is staged and performed. The motor drive detection circuit 4 starts counting the timer in response to the detection of the potential difference between both ends of the motor 2, and controls the power supply of the 5V voltage No. 1 until the scheduled time for the timer to count up has elapsed. Supplied to circuit 7. The power supply control circuit 7 is supplied with the 5V voltage signal. During the @ period, the video circuit 5 is activated.
なお、前記モータ稟動検出回路4のタイマがカウントア
ツプした時には、該検出回路4ではオートフォーカスモ
ータ20両端の電位差が生じているかどうかを判定し、
生じている場合にはタイマの計数を再び開始すると共に
、該タイマがカウントアツプする予定時間が経過するま
で、電源制御回路7への5■の電圧信号の供給を継続す
る。−方、前記タイマがカウントアツプした時に、モー
タ駆動検出回路4において、オートフォーカスモータ2
の両端の纜立差が生じていないと判定した場合には、前
記5vの電圧信号の供給を停止する。Note that when the timer of the motor motion detection circuit 4 counts up, the detection circuit 4 determines whether a potential difference has occurred between both ends of the autofocus motor 20,
If it has occurred, the timer starts counting again, and the supply of the voltage signal 5.1 to the power supply control circuit 7 is continued until the scheduled time for the timer to count up has elapsed. - On the other hand, when the timer counts up, the motor drive detection circuit 4 detects the autofocus motor 2.
If it is determined that there is no difference in voltage between both ends, the supply of the 5V voltage signal is stopped.
以上の説明から明らかなように、本発明によれば、被写
体の動きに応答して生ずるオートフォーカス装置の信号
を検出し、該検出時から予定時間だけビデオカメラの映
像回路を動作状、態にするよ5にしたので、無駄な成力
消費を低減できると共に、部品の長寿命化を実現できる
効果がある。As is clear from the above description, according to the present invention, a signal from an autofocus device generated in response to the movement of a subject is detected, and the video circuit of the video camera is kept in an operating state for a predetermined time from the time of detection. Since the number is set to 5, wasteful power consumption can be reduced and the lifespan of parts can be extended.
第1図は本発明の一実施例のブロック図である。 FIG. 1 is a block diagram of one embodiment of the present invention.
Claims (1)
て、オートフォーカス用モータの駆動信号を検出する手
段と、前記駆動信号の検出に応答して予定時間前記ビデ
オカメラの映像回路を動作状態にする手段とを具備した
ことを特徴とするビデオカメラ。 2、前記映像回路を動作状態にする手段は、前記駆動信
号の検出に応答して計数を開始するタイマと、前記タイ
マがカウントアップするまでの予定時間およびカウント
アップ直後において前記駆動信号が検出された時にはさ
らに予定時間継続して電圧信号を出力する手段と、前記
電圧信号に応答して前記映像回路を動作状態にする電源
制御回路とからなることを特徴とする前記特許請求の範
囲第1項記載のビデオカメラ。[Scope of Claims] 1. In a video camera having an autofocus device, means for detecting a drive signal for an autofocus motor, and in response to the detection of the drive signal, the video circuit of the video camera is in an operating state for a scheduled time. A video camera characterized in that it is equipped with a means for 2. The means for putting the video circuit into an operating state includes a timer that starts counting in response to the detection of the drive signal, a scheduled time until the timer counts up, and a timer that starts counting when the drive signal is detected immediately after the timer counts up. Claim 1, further comprising: means for outputting a voltage signal continuously for a predetermined period of time; and a power supply control circuit for placing the video circuit in an operating state in response to the voltage signal. Video camera listed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61144809A JPS633571A (en) | 1986-06-23 | 1986-06-23 | Video camera |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61144809A JPS633571A (en) | 1986-06-23 | 1986-06-23 | Video camera |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS633571A true JPS633571A (en) | 1988-01-08 |
Family
ID=15370965
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP61144809A Pending JPS633571A (en) | 1986-06-23 | 1986-06-23 | Video camera |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS633571A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0287875A (en) * | 1988-09-26 | 1990-03-28 | Nec Corp | Erroneous picture recording preventing device for video camera |
JPH02113675A (en) * | 1988-10-21 | 1990-04-25 | Fuji Photo Film Co Ltd | Electronic still camera |
-
1986
- 1986-06-23 JP JP61144809A patent/JPS633571A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0287875A (en) * | 1988-09-26 | 1990-03-28 | Nec Corp | Erroneous picture recording preventing device for video camera |
JPH02113675A (en) * | 1988-10-21 | 1990-04-25 | Fuji Photo Film Co Ltd | Electronic still camera |
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