JPS5933982A - Recording device of electronic camera - Google Patents

Recording device of electronic camera

Info

Publication number
JPS5933982A
JPS5933982A JP57143214A JP14321482A JPS5933982A JP S5933982 A JPS5933982 A JP S5933982A JP 57143214 A JP57143214 A JP 57143214A JP 14321482 A JP14321482 A JP 14321482A JP S5933982 A JPS5933982 A JP S5933982A
Authority
JP
Japan
Prior art keywords
motor
shutter
recording
time
pulse
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
Application number
JP57143214A
Other languages
Japanese (ja)
Inventor
Moriji Izumida
守司 泉田
Kazuhiro Sato
和弘 佐藤
Shusaku Nagahara
長原 脩策
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP57143214A priority Critical patent/JPS5933982A/en
Publication of JPS5933982A publication Critical patent/JPS5933982A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To simplify the control when the continuous snapshot is executed for several seconds or less and to reduce the power consumption, by revolving a motor for a fixed period after the recording is over. CONSTITUTION:When a shutter 10 is pushed, a motor 5 is revolved by a motor control circuit 12. An optical shutter 7 is opened and closed after the number of revolutions of the motor 5 reaches a specified level. Then the photoelectric conversion is carried out by an image pickup element 8. The signal of the element 8 is read out, and the signals equivalent to a frame are sampled to be recorded to a magnetic head 4. In such a way, the shutter 7 is opened and closed after the number of revolutions of the motor 5 reaches a fixed level. This produces a delay of about one second for the first image. However it is possible to release the shutter without producing virtually any delay in case of the continuous snapshot by revolving the motor 5 for a specified period after the recording is over.

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明は光情報を電気信号に変換する撮像デバイスと、
前記撮像デバイスの出力信号を記録するモーターにより
駆動される記録媒体とを有する小型の電子カメラにおい
て、安定・良質な記録画像を得るよう前記モーターを駆
動する成子カメラ装置に関する。
[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to an imaging device that converts optical information into an electrical signal,
The present invention relates to a small electronic camera having a recording medium driven by a motor for recording an output signal of the imaging device, and to a Naruko camera device that drives the motor to obtain stable and high-quality recorded images.

〔便来技術〕[Commercial technology]

テレビカメラの磁気記録装置の発展に伴い、従来のフィ
ルムカメラを全電子式に置き侠えようという試みがなさ
れている。
With the development of magnetic recording devices for television cameras, attempts have been made to replace traditional film cameras with all-electronic systems.

その代表例としてはビデオテープレコーダ(VTR)と
テレビカメラを組み合せたシステムがあシ、動画・スロ
ーモーション画像などいろいろな形態の画渾を録画・再
生することが可能でちる。しかし、VTRシステムはテ
レビジョン映像の動画像情報を記録・再生するため多電
の記録媒体を必要とし、装置が複雑でかつ大形になる。
A typical example is a system that combines a video tape recorder (VTR) and a television camera, and is capable of recording and playing back various forms of images such as moving images and slow-motion images. However, the VTR system requires a multi-current recording medium to record and reproduce moving image information of television images, making the device complex and large.

そこで第1図に示すように超小形磁気ディスクに画像を
静止画として記録する方法が提案されている。これは、
例えばテレビカメ21から得られる2次元の画像信号の
1フレーム(又は1フイールド)分を磁気ディスクに記
録する装置である。
Therefore, as shown in FIG. 1, a method has been proposed for recording images as still images on an ultra-small magnetic disk. this is,
For example, it is a device that records one frame (or one field) of a two-dimensional image signal obtained from a television camera 21 on a magnetic disk.

2は装置1のビデオ情報を1フレ一ム分だけ抜き取るフ
レーム抜き取シ回路、3は記録ヘッド、4はd1′Aデ
ィスク、5はモーターである。通常のテレビカメラは3
0分の1秒で1枚の画像(1フレーム)を構j戎してお
シ、これを磁気ディスクに記録する場合ディスク4の回
転数は毎秒30回転又は60回転とし、1トラツク又は
2トラツクで1フレームの信号をアナログ信号で記録す
る。
2 is a frame extracting circuit for extracting one frame of video information from the device 1; 3 is a recording head; 4 is a d1'A disk; and 5 is a motor. A normal TV camera has 3
One image (one frame) is captured in one-tenth of a second, and when this is recorded on a magnetic disk, the rotation speed of the disk 4 is 30 or 60 revolutions per second, and one track or two tracks are recorded. records one frame of signal as an analog signal.

また、アナログ信号をアナログ・ディジタル変換器でデ
ィジタル信号に変換して複数のトラックにd己録しても
よい。
Alternatively, the analog signal may be converted into a digital signal by an analog-to-digital converter and recorded on a plurality of tracks.

この装置において、良好な画像を記録するためには安定
にモーターを回転させる必要がある。また、いつシャッ
ターが押されるかは不明であるため、すぐに記録するた
めには常時モーターを回転させておかなければならない
。っまシディスクとモーターの回転部分(ローターやシ
ャフト)の慣性や摩擦があるため、停止状態から一定の
回転数(毎秒30又は60回転)となるまで時間がかか
る。この時間は直用するモーターの性能や負荷の大きさ
に大きく依存する。モーターの形状や電池の消耗の点か
ら考えると立ち上少時間を1秒以下にするのは〃為なシ
難かしい。
In this device, in order to record good images, it is necessary to rotate the motor stably. Additionally, since it is unknown when the shutter will be pressed, the motor must be kept running at all times in order to record immediately. Because of the inertia and friction between the disc and the rotating parts of the motor (rotor and shaft), it takes time for the motor to reach a certain rotational speed (30 or 60 revolutions per second) from a stopped state. This time largely depends on the performance of the motor used directly and the size of the load. Considering the shape of the motor and the consumption of batteries, it is difficult to reduce the start-up time to less than 1 second.

また、撮鐵系子のメモリー性を利用して、/ヤシター開
閉後からモーターの回転数が一足となるまで信号を読み
出さないでおくこともロエ能であるが、撮像素子の暗電
流に工p画質が劣化するという問題かめる。
It is also possible to use the memory property of the image sensor to not read out the signal until the number of rotations of the motor reaches a certain level after opening/closing the shutter, but it is possible to prevent the dark current of the image sensor from being read out. The problem is that the image quality deteriorates.

したがって吊′にモーターを回転しておくことが考えら
れるが、これは電池の消耗の点からは望ましくない。き
りに、数秒またはこれ以下のタイミングで連写する場ば
には、毎回モーターの立ち上少時間だけ待たなければな
らない。
Therefore, it is conceivable to keep the motor rotating continuously, but this is undesirable from the viewpoint of battery consumption. If you want to take continuous shots over a period of several seconds or less, you will have to wait a short amount of time for the motor to start up each time.

〔発明の目的〕[Purpose of the invention]

本発明は、この様な従来技術の欠点に鑑み電池の消耗が
少く、かつ数秒程度の間隔で連写する際の待ち時間を少
なくすることを目的とする。
In view of these drawbacks of the prior art, it is an object of the present invention to reduce battery consumption and to reduce waiting time when continuous shooting is performed at intervals of several seconds.

〔発明の総括説明〕[General explanation of the invention]

このため、本発明では記録終了後一定期間モーターを回
転させておき、数秒以下の間隔で連写をOfMじとする
ものである。記録終了後にモーターを回転させておく時
間は、光量やシャッタースピードに応じて設定すればよ
い。
For this reason, in the present invention, the motor is kept rotating for a certain period of time after the end of recording, and continuous shooting is performed at intervals of several seconds or less. The amount of time the motor is allowed to rotate after recording ends can be set depending on the amount of light and shutter speed.

〔実施例〕〔Example〕

以下、本発明の実施例を各図を参照して詳l削に説明す
る。
Hereinafter, embodiments of the present invention will be described in detail with reference to the respective figures.

第2図に本発明による電子カメラの一笑施例を、aj 
 bj・・・・・・で示した各点の波形を第3図に示す
FIG. 2 shows an example of an electronic camera according to the present invention.
The waveforms at each point indicated by bj... are shown in FIG.

6は光学レンズ、7は光学シャッター、8は2次元の撮
像素子又は撮像管であシ、9は1フレ一ム抜取シ回路、
3は磁気ヘッド、4は、風気ディスク7.5はモーター
である。また10はシャッター、11はコントロール回
路、12はモーター制御回路である。
6 is an optical lens, 7 is an optical shutter, 8 is a two-dimensional image pickup device or image pickup tube, 9 is a circuit for extracting one frame,
3 is a magnetic head, 4 is an air disk, and 7.5 is a motor. Further, 10 is a shutter, 11 is a control circuit, and 12 is a motor control circuit.

最初にシャッター10を押すとまずモーター制御回路1
2によシモーターを回転させる。モーターが一定回転に
達した後に光学シャッター7を開閉し、撮像素子8にお
いて光電変換をおこなう。
When you press the shutter 10 for the first time, the motor control circuit 1
2. Rotate the shimo motor. After the motor reaches a certain rotation, the optical shutter 7 is opened and closed, and the image sensor 8 performs photoelectric conversion.

次に撮像素子の信号を読み出し、1フレ一ム分の信号だ
けを抜き取シ、磁気ヘッド3によシ磁気ディスク4に記
録する。したがって、最初の撮像に関してはモーターの
回転数が一定になった後に光学シャッターを開閉するの
で1秒前後の遅延が生じる。
Next, the signals from the image sensor are read out, and only the signals for one frame are extracted and recorded on the magnetic disk 4 by the magnetic head 3. Therefore, for the first imaging, the optical shutter is opened and closed after the rotational speed of the motor becomes constant, resulting in a delay of about 1 second.

そして記録終了後直ちにモーターを停止させると毎回1
秒前後のずれが生じることになる。
And if you stop the motor immediately after recording ends, it will return 1 every time.
This will result in a difference of around seconds.

本発明においては、記録終了挾の一定期間はモーターを
回転させておき、連写の場合にはこの遅延tはとんどな
いようにするものである。
In the present invention, the motor is kept rotating for a certain period of time before recording ends, and this delay t is minimized in the case of continuous shooting.

第3図に、第2図の各点al bt・旧・・の波形を示
す。シャッター10を押したパルスaでモーター制御回
路12をスタートさせる(b)。Cはモーター5のスピ
ードを示したもので、一定スピードとなった瞬間に光学
シャッター7を開閉する(d)。光学シャッター開閉後
に1フレーム抜取シバ/l/ ス(e)で1可号を抜取
りm気ディスクに記録する。この後に単安定マルチバイ
ブレータ等にょシ一定期間ONとなるパルス(f)を発
生させる。もしパルス(f)がONの期間に再びシャッ
ターが押されない場合にはモーターの回転を停止させる
。((b)の太:IM)。
FIG. 3 shows waveforms at each point al, bt, old, etc. in FIG. 2. The motor control circuit 12 is started by the pulse a when the shutter 10 is pressed (b). C indicates the speed of the motor 5, and the moment the speed reaches a certain level, the optical shutter 7 is opened and closed (d). After opening and closing the optical shutter, one frame is sampled and the first frame is sampled at step (e) and recorded on the disk. After this, a monostable multivibrator or the like generates a pulse (f) that is ON for a certain period of time. If the shutter is not pressed again while the pulse (f) is ON, the rotation of the motor is stopped. ((b) thick: IM).

パルス(f)をONにする期間は、光量またはシャツタ
ースピードに応じて設定する。たとえば、シャッタース
ピードがモーターの立ち上少時間よシ長い揚付にはパル
ス(f)の時間は零であってもよい。
The period during which the pulse (f) is turned on is set depending on the light amount or shutter speed. For example, when the shutter speed is longer than the start-up time of the motor, the pulse (f) time may be zero.

つまシ、シャッターが閉じるまでにモーターの回転数が
一定となる場合には、記録終了後にモーターを回転させ
ておく必要はない。
If the number of rotations of the motor remains constant until the knob or shutter closes, there is no need to keep the motor rotating after recording is complete.

たとえばモーターの立上少時間をTo、シャッターが開
いている時間をTsとすると、Ts、2T。
For example, if the short startup time of the motor is To and the time the shutter is open is Ts, then Ts, 2T.

の場合にはパルス(f)の幅は零、TsくToの場合に
はパルス(f)の幅はTo−Ts(秒)以上としておけ
ばよい。
In the case of , the width of the pulse (f) may be zero, and in the case of Ts - To, the width of the pulse (f) may be set to be equal to or greater than To - Ts (seconds).

もしパルス(f)がONの期間にシャッターを押した場
合は点線で示すように、すぐに光学シャッターを開閉し
1フレームの信号を記録する。これと同時にパルス(f
)を再スタートさせ((りの点線)、次の7ヤツターを
受は入れる状態とする。この結果、連写の2枚目以降は
光学シャッター7の巻上げ(機械式の場合)の時間また
はlフレームの信号を記録する時間で決まる繰シ返し時
間で撮像できることになる。記録ヘッドは1枚ごとに1
トラック分たけ移動させておく。パルス(f)の幅を数
秒に設ボしておくと、この時間以下の繰シ返しで撮像す
る蜀酋には待ち時間なしで撮像することができる。
If the shutter is pressed while the pulse (f) is ON, the optical shutter is immediately opened and closed and one frame of signal is recorded, as shown by the dotted line. At the same time, the pulse (f
) is restarted ((dotted line), and the next 7 shots are accepted. As a result, from the second continuous shooting onwards, the time for winding the optical shutter 7 (in the case of mechanical type) or l This means that images can be captured in a repeating time determined by the time it takes to record frame signals.
Move it by one track. If the width of the pulse (f) is set to several seconds, images can be taken without waiting time when images are taken repeatedly for less than this time.

第3図のパルスを発生させるだめの回路図の1例を第4
図に示す。シャッターlOの信号(a)の立上りで7リ
ツプフロツプ28tセツトする。この出力Qが第3図(
b)となる。モータ−11tlJ御回路12の出力(C
)はモーターのスピードを示しでおシ、これを比較器2
4に入カレ基準電圧Vを超した時点で単安定マルチバイ
ブレータ(以下M、Mと呼ぶ)2をセットする。また、
(a)の信号がONでかつ再トリカー可能なfV 、 
M4 (26)の状態がOFFの場合にM、Ml (2
1)f:ONとする。M、Mlと2 (21,22)の
出力のO几を取ったものを第3図(d)とし、光学シャ
ッター7を開閉するパルスとする。更にこのパルスでM
、M3 (2s)をd作させ′1フレーム抜き取シバル
ス(e)とする。また、このパルスで丹トリガー可能な
M、M4 (26)を動作させたものがパルス(Ωであ
シ、更にM、M5(27)で短いパルスを発生させこれ
で7リツプフロツプ28をリセットすればよい。
An example of a circuit diagram for generating the pulse shown in Fig. 4 is shown in Fig. 4.
As shown in the figure. At the rising edge of the shutter lO signal (a), the 7 lip-flop 28t is set. This output Q is shown in Figure 3 (
b). Motor-11tlJ control circuit 12 output (C
) indicates the speed of the motor, which is compared to comparator 2.
4, when the input reference voltage V is exceeded, a monostable multivibrator (hereinafter referred to as M, M) 2 is set. Also,
fV when the signal in (a) is ON and can be retriggered,
When the state of M4 (26) is OFF, M, Ml (2
1) f: Turn ON. The output of M, Ml and 2 (21, 22) is shown in FIG. 3(d), and is used as a pulse for opening and closing the optical shutter 7. Furthermore, with this pulse
, M3 (2s) is made d and '1 frame is extracted as Sibars (e). Also, if this pulse operates M and M4 (26) which can be triggered by red, the pulse (ohm) will generate a short pulse at M and M5 (27), and this will reset the 7 lip-flop 28. good.

次にシャッターを押した状態で連写する場合のタイミン
グの例を第5図に示す。
Next, FIG. 5 shows an example of the timing for continuous shooting with the shutter pressed.

シャッター10を押した1枚目の撮像は第3図と同じ動
作を行なう。すなわち、モーターを回転させ(b’ )
、一定の回転数となったことを検出して(a′)、光学
シャッター7を開閉する(6勺。
When the shutter 10 is pressed to capture the first image, the same operation as in FIG. 3 is performed. That is, rotate the motor (b')
, detects that the rotation speed has reached a certain level (a'), and opens and closes the optical shutter 7 (6 times).

次に1フレ一ム分の信号を抜取シ磁気ディスクに記録す
る(a′の1)。この記録が完了したことを検出しくg
’ )、これから再び光学シャッターの開閉、lフレー
ム抜取シ、記録の動作を繰シ返す(e /の2〜6)。
Next, the signal for one frame is extracted and recorded on the magnetic disk (1 of a'). I want to detect that this recording is complete.
' ), and the operations of opening and closing the optical shutter, extracting one frame, and recording are repeated again (e/2 to 6).

但し、この動作はa′がONの状態だけに制限し、もし
a′がOFFの場合にはこれを停止させる。
However, this operation is limited to only when a' is ON, and is stopped if a' is OFF.

このように、本発明によれば1枚の画像r数秒以下で連
写する場合のコントロールが簡単で、かつ消費電力を少
なくすることができる。
As described above, according to the present invention, it is possible to easily control the continuous shooting of one image for several seconds or less, and to reduce power consumption.

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

第1図は従来の静止画記録システムの例、第2図は本発
明による静止画記録システムの構造を示す図、第3図は
本発明によるタイミングを示す1例、第4図は第3図の
パルスを発生させる回路例、第5図は本発明により連写
を行なうタイミングを第1図 呆 Z 図 不3図 電4図
FIG. 1 is an example of a conventional still image recording system, FIG. 2 is a diagram showing the structure of a still image recording system according to the present invention, FIG. 3 is an example of timing according to the present invention, and FIG. 4 is a diagram showing the structure of a still image recording system according to the present invention. Figure 5 shows an example of a circuit that generates a pulse, and Figure 5 shows the timing of continuous shooting according to the present invention.

Claims (1)

【特許請求の範囲】 1、光学シャッターを介して取シ込まれた光情報を電気
信号に変換する撮像デバイスと、モータによシ駆動され
上記撮鍼デバイスの1に号を記録録再生するヘッドを有
する′成子カメ岑と置において、記録終了後一定期間前
記モーターを回転−1を弥 において、記録終了時点においてシャッターが押し込ま
れた状態を検知した場合、再び光学シ
[Scope of Claims] 1. An imaging device that converts optical information taken in through an optical shutter into an electrical signal, and a head that is driven by a motor and records, records, and reproduces information on the acupuncture device 1. In a case where the motor is rotated -1 for a certain period of time after the end of recording, if it is detected that the shutter is pressed in at the end of recording, the optical system is turned on again.
JP57143214A 1982-08-20 1982-08-20 Recording device of electronic camera Pending JPS5933982A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57143214A JPS5933982A (en) 1982-08-20 1982-08-20 Recording device of electronic camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57143214A JPS5933982A (en) 1982-08-20 1982-08-20 Recording device of electronic camera

Publications (1)

Publication Number Publication Date
JPS5933982A true JPS5933982A (en) 1984-02-24

Family

ID=15333539

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57143214A Pending JPS5933982A (en) 1982-08-20 1982-08-20 Recording device of electronic camera

Country Status (1)

Country Link
JP (1) JPS5933982A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6141232U (en) * 1984-08-21 1986-03-15 富士写真光機株式会社 Rotary shutter device
JPS6294086A (en) * 1985-10-19 1987-04-30 Fuji Photo Film Co Ltd Electronic still camera

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54140507A (en) * 1978-04-23 1979-10-31 Canon Inc Image recorder

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54140507A (en) * 1978-04-23 1979-10-31 Canon Inc Image recorder

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6141232U (en) * 1984-08-21 1986-03-15 富士写真光機株式会社 Rotary shutter device
JPS6294086A (en) * 1985-10-19 1987-04-30 Fuji Photo Film Co Ltd Electronic still camera

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