JPS58166885A - Electronic still camera - Google Patents
Electronic still cameraInfo
- Publication number
- JPS58166885A JPS58166885A JP57049001A JP4900182A JPS58166885A JP S58166885 A JPS58166885 A JP S58166885A JP 57049001 A JP57049001 A JP 57049001A JP 4900182 A JP4900182 A JP 4900182A JP S58166885 A JPS58166885 A JP S58166885A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic disk
- release switch
- still camera
- video signal
- signal
- 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
- 238000001514 detection method Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005375 photometry Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- -1 silver halide Chemical class 0.000 description 1
Abstract
Description
【発明の詳細な説明】 本発明は、像歪の少ない電子式スチルカメラに関する。[Detailed description of the invention] The present invention relates to an electronic still camera with little image distortion.
従来、例えばＣＣＤ等の固体撮像素子および超小型磁気
ディスクを用い、被写体の画像を映像信号として該磁気
ディスクに記録する電子式スチルカメラが知られている
。このような電子式スチルカメラにおいては通常電源ス
ィッチが設けられており、この電源スィッチをオンする
と固体撮像素子、磁気ディスク装置等に電力が供給され
電子式スチルカメラが動作を開始する。固体撮像素子は
一般にテレビカメラ規格に準じて構成され、従って電源
スイッチがオンしている間１／６０秒周期で露光、電荷
蓄積、映像信号発生を繰り返している。2. Description of the Related Art Conventionally, electronic still cameras have been known that use a solid-state image pickup device such as a CCD and an ultra-small magnetic disk, and record an image of a subject on the magnetic disk as a video signal. Such electronic still cameras are usually provided with a power switch, and when the power switch is turned on, power is supplied to the solid-state image sensor, magnetic disk device, etc., and the electronic still camera starts operating. A solid-state image sensor is generally constructed in accordance with television camera standards, and therefore, exposure, charge accumulation, and video signal generation are repeated at a cycle of 1/60 seconds while the power switch is on.
また、磁気ディスクも電源オン中は常時回転している。Furthermore, the magnetic disk is also constantly rotating while the power is on.
そして、レリーズ釦が押下されレリーズスイッチが動作
すると、磁気ディスク装置の映像信号薔き込み回路が１
／６０秒間動作して固体撮像素子から発生する１フレ一
ム分の映像信号を記録している。When the release button is pressed and the release switch operates, the video signal input circuit of the magnetic disk device is activated.
It operates for /60 seconds and records the video signal for one frame generated from the solid-state image sensor.
ところで、このような電子式スチルカメラにおいて電源
スィッチをオンして間もなくレリーズ釦を押下した場合
、磁気ディスクの回転速度が一定の速度に達しないうち
に映像信号が記録されることとなり、記録される画像が
歪んだり、解像度が悪くなるという不都合があった。ま
た、この問題を解消するために電源を長時間オンしたま
まにすると電池などの電源が消耗してしまうという不都
合があった。さらにこの電子式スチルカメラにおいては
前述のように露光□時間がテレビカメラと同じ約１７６
０秒に固定されているため、動きの速い物体を撮影する
場合、像歪が生じるという不都合があった。By the way, in such an electronic still camera, if you press the release button soon after turning on the power switch, the video signal will be recorded before the rotation speed of the magnetic disk reaches a certain speed, and the video signal will not be recorded. There were inconveniences such as distorted images and poor resolution. Furthermore, in order to solve this problem, if the power source is left on for a long time, the power source such as the battery will be consumed. Furthermore, as mentioned above, this electronic still camera has an exposure time of approximately 176 seconds, which is the same as that of a television camera.
Since the time is fixed at 0 seconds, there is an inconvenience that image distortion occurs when photographing a fast-moving object.
本発明の第１の目的は磁気ディスクの回転数を検出して
磁気ディスクが一定速度になったときに映像信号を記録
し、電源投入直後にレリーズ釦を押下した場合も歪の々
い画像を記録することである。また、本発明の第２の目
的は動きの速い被写体を歪なく撮影することである。こ
の第２の目的を達成するために本発明の電子式スチルカ
メラにおいては固体撮像素子の露光時間を調節するだめ
の物性シャッタまたは電磁シャッタを設け、これらのシ
ャッタを介して得られた投影画像による映像信号を磁気
ディスクが一定速度に達した後記録する。The first object of the present invention is to detect the rotational speed of the magnetic disk and record a video signal when the magnetic disk reaches a certain speed, thereby producing an image with minimal distortion even when the release button is pressed immediately after power is turned on. It is to record. A second object of the present invention is to photograph a fast-moving subject without distortion. In order to achieve this second objective, the electronic still camera of the present invention is provided with a physical shutter or an electromagnetic shutter for adjusting the exposure time of the solid-state image sensor, and the projected image obtained through these shutters is Video signals are recorded after the magnetic disk reaches a certain speed.
以下図面を用いて本発明の詳細な説明する。The present invention will be described in detail below using the drawings.
第１図は本発明の１実施例の要部を示すブロック図であ
る。すなわち、従来はレリーズスイッチからのレリーズ
信号を直接磁気ディスク装置の記録動作開始トリガ信号
として用いていたが、第１ 。FIG. 1 is a block diagram showing the main parts of one embodiment of the present invention. That is, in the past, the release signal from the release switch was directly used as a trigger signal for starting the recording operation of the magnetic disk device.
図の装置においては磁気ディスクの回転数が所定の回転
数を超えたときに開くゲート１を介して磁気ディスク装
置への記録動作開始トリガ信号を送出している。同図に
おいて、２は第２段レリーズスイッチ、３は回転数を電
圧に変換し、さらに基準電圧と比較して磁気ディスクが
所定の回転数以上で回転しているときに回転検出信号を
発生する回転数検出回路である。なお、この回転数検出
は磁気ディスクと連動する部分に磁石を取り付け、この
磁石のＮおよびＳ極が検出ヘッドの前を通る回数を検出
してもよく、穴開き円盤とフォトカプラとの組合せ、ギ
ヤと検出ヘッドとの組合せを用いてもよい。また、磁気
ディスク駆動用サーボモータの回転数検出出力を流用し
てもよい。In the device shown in the figure, a trigger signal for starting a recording operation is sent to the magnetic disk device through a gate 1 that opens when the number of rotations of the magnetic disk exceeds a predetermined number of rotations. In the figure, 2 is a second-stage release switch, 3 is a converter that converts the rotation speed into voltage, and further compares it with a reference voltage to generate a rotation detection signal when the magnetic disk is rotating at a predetermined rotation speed or higher. This is a rotation speed detection circuit. Note that this rotation speed detection may be performed by attaching a magnet to the part that interlocks with the magnetic disk and detecting the number of times the N and S poles of this magnet pass in front of the detection head. A combination of gears and detection heads may also be used. Alternatively, the rotational speed detection output of a servo motor for driving a magnetic disk may be used.
第２図は本発明の他の実施例を示すブロック構成図であ
る。同図において、１１はレンズ、紋す等のカメラレン
ズ光学系、１２は電磁シャッタ、１３はＣＣＤ等の固体
撮像素子、１４は映像信号増巾器およびＦＭ変調器等を
含む映像信号回路、１５はゲート回路、１６は記録ヘッ
ド、１７は磁気ディスク、１８は磁気ディスク回転数検
出回路１９はこの電子スチルカメラの各部に動作信号を
送出する制御回路である。FIG. 2 is a block diagram showing another embodiment of the present invention. In the figure, 11 is a camera lens optical system such as a lens and a frame, 12 is an electromagnetic shutter, 13 is a solid-state image sensor such as a CCD, 14 is a video signal circuit including a video signal amplifier, an FM modulator, etc., and 15 is a video signal circuit including a video signal amplifier, an FM modulator, etc. 1 is a gate circuit, 16 is a recording head, 17 is a magnetic disk, and 18 is a magnetic disk rotation speed detection circuit 19, which is a control circuit that sends operating signals to each part of this electronic still camera.
次にこの電子スチルカメラの動作を第６図のタイムチャ
ートを参照しながら説明する。このカメラのレリーズ釦
は一般のＴＴＬ １ｌｌｌ１元式の銀塩フィルムカメ２
と同様の２段動作式のものを使用しており、その押下ス
トローク（ａ）に従い、先ず第１段レリーズスイッチが
、次いで第２段レリーズスイッチが動作する（ｂ、ｃ）
。第１段レリーズスイッチはカメラ全体の電源スィッチ
になっており、このスイッチが動作すると磁気ディスク
駆動モータおよび各回路に電力が供給され磁気ディスク
１７が回転しはじめる（ｄ）とともに周知のＴＴＬ測光
がなされ、設定された紋りまたはシャッタ速度に対して
適正なシャッタ速度または紋りが決定される（例えばｆ
）。次に第２のレリーズスイッチが動作してレリーズ信
号が発生すると（ｃ）、磁気ディスク回転数検出回路１
８出力（６１により磁気ディスク１７の回転数が所定回
転数以上に達するまで待って、固体撮像素子１３の転送
パルスと同期して電磁シャッタ１２を動作させる（ｇ）
。続いて、固体撮像素子１３がカメラレンズ光学系１１
を介して投影された画像に応じて発生する１フレ一ム分
の映像信号を周知の方法で磁気ディスク１７に記録する
。Next, the operation of this electronic still camera will be explained with reference to the time chart shown in FIG. The release button of this camera is a general TTL 1lll 1-element type silver halide film camera 2.
A two-stage release switch similar to the above is used, and according to the pressing stroke (a), the first stage release switch operates first, then the second stage release switch operates (b, c).
. The first stage release switch is the power switch for the entire camera, and when this switch operates, power is supplied to the magnetic disk drive motor and each circuit, and the magnetic disk 17 begins to rotate (d) and the well-known TTL photometry is performed. , an appropriate shutter speed or fringing is determined for the set fringing or shutter speed (for example, f
). Next, when the second release switch operates and a release signal is generated (c), the magnetic disk rotation speed detection circuit 1
8 output (61 waits until the number of rotations of the magnetic disk 17 reaches a predetermined number of rotations or more, and operates the electromagnetic shutter 12 in synchronization with the transfer pulse of the solid-state image sensor 13 (g)
. Subsequently, the solid-state image sensor 13 is connected to the camera lens optical system 11.
A video signal for one frame generated in response to the image projected through the magnetic disk 17 is recorded on the magnetic disk 17 by a well-known method.
なお、上述の実施例においては磁気ディスクが所定の回
転数になるのを待って電磁シャッタを動 −作させたが
、例えば、レリーズ信号（ｅ）が発生したとき、固体撮
像素子１５の蓄積電荷をクリアし、電磁シャッタを動作
させた後待機させ、次に回転検出信号（ｆ）が発生した
ときに固体撮像素子１３から蓄積電荷を読み出しく転送
させ）て磁気ディスクに記録するようにしてもよい。In the above-described embodiment, the electromagnetic shutter is operated after waiting for the magnetic disk to reach a predetermined number of rotations, but for example, when the release signal (e) is generated, the accumulated charge , the electromagnetic shutter is operated and then put on standby, and the next time the rotation detection signal (f) is generated, the accumulated charge is read out from the solid-state image sensor 13 (transferred) and recorded on the magnetic disk. good.
以上のように本発明によると、例えばレリーズ釦の第１
段目押下で磁気ディスクの回転を開始するようにしても
記録時は必らず磁気ディスクが一定速度になっているだ
め磁気ディスクの速度不足または変動による像歪、解像
度不足を生じることなく電子式スチルカメラの省電力化
を図ることができ、また、電磁シャッタおよび物性シャ
ッタ等により固体撮像素子の窯元時間を制御することに
より、動きの速い物体の場合も磁気ディスク上に１フレ
一ム分の静止画像を忠実に再現でき、像歪のない画像が
得られる。As described above, according to the present invention, for example, the first release button
Even if the rotation of the magnetic disk is started by pressing the step, the magnetic disk will always be at a constant speed during recording, so there will be no image distortion or insufficient resolution due to insufficient or variable speed of the magnetic disk. It is possible to reduce the power consumption of still cameras, and by controlling the firing time of the solid-state image sensor using electromagnetic shutters and physical shutters, even in the case of fast-moving objects, one frame can be stored on the magnetic disk. Still images can be faithfully reproduced and images without image distortion can be obtained.
第１図は本発明の１実施例の要部を示すブロック図、第
２図は本発明の他の実施例を示すブロック構成図、そし
て第６図は第２図のスチルカメラの動作を詣明するだめ
のタイムチャートである。
１・・・ゲート、２・・・第２レリーズスイツチ、ろ・
・・回転数検出回路、１１・・・カメラレンズ光学系、
１２・・電磁ンヤツタ、１３・・・固体撮像素子、１４
・・・映像信号回路、１５・・・ゲート回路、１６・・
記録ヘッド、１７・・・磁気ディスク１．１８・・・回
転数検出回路、１９・・・制御回路。
特許出願へ 株式会社 コ・ξル
代理人 弁理士 伊 東 辰 雄
ほか１名FIG. 1 is a block diagram showing the main parts of one embodiment of the present invention, FIG. 2 is a block diagram showing another embodiment of the present invention, and FIG. 6 shows the operation of the still camera shown in FIG. This is a time chart for clarity. 1...Gate, 2...2nd release switch,
...Rotation speed detection circuit, 11...Camera lens optical system,
12... electromagnetism, 13... solid-state image sensor, 14
...Video signal circuit, 15...Gate circuit, 16...
Recording head, 17... Magnetic disk 1.18... Rotation speed detection circuit, 19... Control circuit. To apply for patent Co., Ltd. agent Patent attorney Tatsuo Ito and 1 other person
Claims (1)
子とレリーズスイッチからのレリーズ信号に応じて該撮
像素子からの映像信号を記録する磁気ディスク装置とを
具備する電子式スチルカメラにおいて、該電子式スチル
カメラに該磁気ディスクの回転速度検出手段を設け、該
レリーズスイッチからレリーズ信号が送出されたとき該
磁気ディスクの回転速度が所定の一定速度であることを
条件に該磁気ディスクに映像信号を記録することを特徴
とする電子式スチルカメラ。 ２ レリーズスイッチはレリーズ釦の押下に伴なって順
次動作する第１および第２段レリーズスイッチからなり
、該第１段レリーズスイッチが動作したとき磁気ディス
クを始動するとともに該第２段レリーズスイッチが動作
しかつ該磁気ディスクが一定速度に達したとき固体撮像
素子から発生する映像信号を該磁気ディスクに記録する
特許請求の範囲第１項記載の電子式スチルカメラ。 ３ 第２段レリーズスイッチが動作したとき動作する電
磁シャッタまたは物性シャッタを備え、該シャッタが動
作しかつ磁気ディスクが一定速度に達したときに映像信
号を該磁気ディスクに記録する特許請求の範囲第２項記
載の′１子式スチルカメラ。[Claims] 1. An electronic type comprising an image sensor that generates a video signal corresponding to an image of a subject and a magnetic disk device that records the image signal from the image sensor in response to a release signal from a release switch. In a still camera, the electronic still camera is provided with means for detecting the rotational speed of the magnetic disk, and the rotational speed of the magnetic disk is a predetermined constant speed when a release signal is sent from the release switch. An electronic still camera that records video signals on a magnetic disk. 2. The release switch consists of a first and second stage release switch that operate sequentially as the release button is pressed, and when the first stage release switch operates, the magnetic disk is started and the second stage release switch is activated. 2. The electronic still camera according to claim 1, wherein a video signal generated from a solid-state image sensor is recorded on the magnetic disk when the magnetic disk reaches a certain speed. 3. Claim No. 3, comprising an electromagnetic shutter or a physical shutter that operates when the second stage release switch operates, and records a video signal on the magnetic disk when the shutter operates and the magnetic disk reaches a certain speed. The single-child type still camera described in item 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57049001A JPS58166885A (en) | 1982-03-29 | 1982-03-29 | Electronic still camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57049001A JPS58166885A (en) | 1982-03-29 | 1982-03-29 | Electronic still camera |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58166885A true JPS58166885A (en) | 1983-10-03 |
| JPH0324836B2 JPH0324836B2 (en) | 1991-04-04 |
Family
ID=12818944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57049001A Granted JPS58166885A (en) | 1982-03-29 | 1982-03-29 | Electronic still camera |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58166885A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5951672A (en) * | 1982-09-17 | 1984-03-26 | Fuji Photo Film Co Ltd | Electronic still camera |
| JPS5972880A (en) * | 1982-10-19 | 1984-04-24 | Nippon Kogaku Kk <Nikon> | Electronic still camera |
| JPS59108484A (en) * | 1982-12-14 | 1984-06-22 | Olympus Optical Co Ltd | Electronic camera device |
| JPS60130976A (en) * | 1983-12-19 | 1985-07-12 | Toshiba Corp | Electronic camera |
| JPS60165875A (en) * | 1984-02-09 | 1985-08-29 | Fuji Photo Film Co Ltd | Electronic still camera |
| JPS61281780A (en) * | 1985-06-07 | 1986-12-12 | Fuji Photo Film Co Ltd | Electronic still camera |
| JPH07170476A (en) * | 1994-03-28 | 1995-07-04 | Nikon Corp | Electronic still camera |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5896475A (en) * | 1981-12-03 | 1983-06-08 | Canon Inc | Picture recorder |
| JPS58148577A (en) * | 1982-02-26 | 1983-09-03 | Canon Inc | Image pickup and recording device |
-
1982
- 1982-03-29 JP JP57049001A patent/JPS58166885A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5896475A (en) * | 1981-12-03 | 1983-06-08 | Canon Inc | Picture recorder |
| JPS58148577A (en) * | 1982-02-26 | 1983-09-03 | Canon Inc | Image pickup and recording device |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5951672A (en) * | 1982-09-17 | 1984-03-26 | Fuji Photo Film Co Ltd | Electronic still camera |
| JPS5972880A (en) * | 1982-10-19 | 1984-04-24 | Nippon Kogaku Kk <Nikon> | Electronic still camera |
| JPS59108484A (en) * | 1982-12-14 | 1984-06-22 | Olympus Optical Co Ltd | Electronic camera device |
| JPS60130976A (en) * | 1983-12-19 | 1985-07-12 | Toshiba Corp | Electronic camera |
| JPH0546753B2 (en) * | 1983-12-19 | 1993-07-14 | Tokyo Shibaura Electric Co | |
| JPS60165875A (en) * | 1984-02-09 | 1985-08-29 | Fuji Photo Film Co Ltd | Electronic still camera |
| JPS61281780A (en) * | 1985-06-07 | 1986-12-12 | Fuji Photo Film Co Ltd | Electronic still camera |
| JPH07170476A (en) * | 1994-03-28 | 1995-07-04 | Nikon Corp | Electronic still camera |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0324836B2 (en) | 1991-04-04 |
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