JPH0115255Y2 - - Google Patents
Info
- Publication number
- JPH0115255Y2 JPH0115255Y2 JP1981009563U JP956381U JPH0115255Y2 JP H0115255 Y2 JPH0115255 Y2 JP H0115255Y2 JP 1981009563 U JP1981009563 U JP 1981009563U JP 956381 U JP956381 U JP 956381U JP H0115255 Y2 JPH0115255 Y2 JP H0115255Y2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- deflection
- image pickup
- signal
- pickup tube
- 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
Links
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims 1
- 230000001360 synchronised effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Description
【考案の詳細な説明】
本考案は、撮像管及びビユーフアインダの偏向
回路が共用化されているテレビジヨンカメラ装置
の改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a television camera device in which the deflection circuits of the image pickup tube and the viewfinder are shared.
家庭用テレビジヨンカメラ（以下「カメラ」と
いう）は、その性格上低消費電力化が要求され
る。一方構能の面から言えば、被写体を正しく撮
像するため、あるいは撮像した画像が正しくビデ
イオテープレコーダ（以下「VTR」という）に
録画されているかをチエツクするためにも、被写
体の撮像範囲を定めるエレクトリツク・ビユーフ
アインダ（単にビユーフアインダとも呼ぶ、以下
「VF」という）が必要である。しかしながら、こ
のために一般的には消費電力が増大する。そこ
で、撮像管の偏向とVFの偏向を同一の偏向回路
で行い、この偏向回路の規模を縮小すると共に、
消費電力を少なくする方式が検討され、実用化さ
れている。このような方式が採用されているカメ
ラの従来例のブロツク構成図を第１図に示す。 Home television cameras (hereinafter referred to as "cameras") are required to have low power consumption due to their nature. On the other hand, from the perspective of composition, in order to capture the subject correctly, or to check whether the captured image is correctly recorded on a video tape recorder (hereinafter referred to as "VTR"), the imaging range of the subject must be adjusted. An electric viewfinder (also simply called a viewfinder, hereinafter referred to as "VF") is required. However, this generally increases power consumption. Therefore, the deflection of the image pickup tube and the deflection of the VF are performed by the same deflection circuit, and the scale of this deflection circuit is reduced.
Methods to reduce power consumption are being studied and put into practical use. FIG. 1 shows a block diagram of a conventional camera employing this type of system.
第１図において、１は同期信号発生器（同期結
合回路を含む）、２は水平偏向回路、３は垂直偏
向回路、４は撮像管水平偏向コイル、５はVF水
平偏向コイル、６は撮像管垂直偏向コイル、７は
VF垂直偏向コイル、８は撮像管、９はVF、１０
はVF映像回路、１１′は切換コントロール回路で
ある。 In Fig. 1, 1 is a synchronous signal generator (including a synchronous coupling circuit), 2 is a horizontal deflection circuit, 3 is a vertical deflection circuit, 4 is an image pickup tube horizontal deflection coil, 5 is a VF horizontal deflection coil, and 6 is an image pickup tube. Vertical deflection coil, 7
VF vertical deflection coil, 8 is image pickup tube, 9 is VF, 10
is a VF video circuit, and 11' is a switching control circuit.
第１図に示すように、この方式の従来のカメラ
は、入力信号が同期信号発生器１に入力し、ここ
で同期結合され、水平偏向回路２、垂直偏向回路
３にドライブ信号を送つている。例えば、VTR、
あるいは外部映像信号をVFに再生する場合、カ
メラ内部の同期信号発生器１で同期結合を行い、
VFの同期をとつている。 As shown in Fig. 1, in the conventional camera of this type, an input signal is input to a synchronous signal generator 1, where it is synchronously combined and sends a drive signal to a horizontal deflection circuit 2 and a vertical deflection circuit 3. . For example, VTR,
Alternatively, when reproducing an external video signal to VF, synchronize and combine using the synchronization signal generator 1 inside the camera.
VF is synchronized.
しかしながら、VTRからの信号がドロツプア
ウトあるいは静止状態モードの信号のとき、特に
静止状態のときには、同期信号も規定の信号とな
らないため、同期信号発生器１の同期結合が正常
に動作しないことがあり、同期はずれ等を起すこ
とがあつた。このように、ある条件では、前記ド
ライブ信号にジツター等が発生し、正常な偏向動
作を行うことができない等の欠点があつた。 However, when the signal from the VTR is a dropout or stationary mode signal, especially when it is stationary, the synchronization signal will not be the specified signal, so the synchronization coupling of the synchronization signal generator 1 may not operate properly. There were cases where synchronization was lost. As described above, under certain conditions, jitter or the like occurs in the drive signal, resulting in the drawback that normal deflection operation cannot be performed.
本考案の目的は、前記欠点を除去し、外部入力
信号の再生をVFで見るような場合等においても
安定した再生画像を得るようにした撮像管及び
VFの偏向回路が共用化されたカメラを提供する
ことにある。 The object of the present invention is to provide an image pickup tube and an image pickup tube that eliminate the above-mentioned drawbacks and obtain stable reproduced images even when viewing the reproduction of an external input signal with a VF.
The objective is to provide a camera in which the VF deflection circuit is shared.
本考案は、前記目的を達成するためになされた
ものであり、その特徴は、撮像管及びVFの偏向
回路が共用化されたカメラにおいて、外部入力信
号の再生をVFで見るような場合等においては、
別途設けたAFC回路の出力で偏向を行うことに
より、安定な画像を得ることができるようにした
ことにある。 The present invention has been made to achieve the above object, and its characteristics are suitable for cameras in which the image pickup tube and the VF deflection circuit are shared, such as when the reproduction of an external input signal is viewed on the VF. teeth,
By performing deflection using the output of a separately provided AFC circuit, a stable image can be obtained.
以下、実施例により本考案を詳細に説明する。 Hereinafter, the present invention will be explained in detail with reference to Examples.
なお、第２図において、第１図と同一のものは
同一記号を付してある。 In FIG. 2, the same parts as in FIG. 1 are given the same symbols.
第２図は、本考案の一実施例のブロツク構成図
であり、第１図の従来方式に、通常の場合と、外
部映像信号をVFに再生するとき等の場合とで、
偏向ドライブ信号源を替えるための同期分離及び
AFC回路１２，切換回路１３を設けたものであ
る。 FIG. 2 is a block configuration diagram of an embodiment of the present invention. In addition to the conventional method shown in FIG.
Synchronous separation and separation for changing deflection drive signal sources
An AFC circuit 12 and a switching circuit 13 are provided.
この実施例の動作は、通常動作のときは前記切
換回路１３を切換コントロール回路１１によつて
Ａ接点側に切り換えて、同期信号発生器１の出力
ドライブ信号で水平偏向回路２及び垂直偏向回路
３を動作させ、この出力により偏向コイル４〜７
を付勢する。外部映像信号が入力したときは、前
記切換回路１３を切換コントロール回路１１によ
つてＢ接点側に切り換えて、AFC回路１２を動
作させ、この出力で水平偏向回路２及び垂直偏向
回路３を動作させる。前記同様にこの出力で偏向
コイル４〜７を付勢する。 In the operation of this embodiment, during normal operation, the switching circuit 13 is switched to the A contact side by the switching control circuit 11, and the output drive signal of the synchronizing signal generator 1 is used to control the horizontal deflection circuit 2 and the vertical deflection circuit 3. This output causes deflection coils 4 to 7 to operate.
energize. When an external video signal is input, the switching circuit 13 is switched to the B contact side by the switching control circuit 11 to operate the AFC circuit 12, and this output operates the horizontal deflection circuit 2 and the vertical deflection circuit 3. . Similarly to the above, this output energizes the deflection coils 4 to 7.
このようにすることにより、VTRの静止モー
ドの信号のように同期信号の周波数が規定の周波
数よりずれているような場合には、AFC回路に
よつて周波数を規定値に設定することができる。 By doing this, when the frequency of the synchronizing signal deviates from the specified frequency, such as a VTR stationary mode signal, the frequency can be set to the specified value by the AFC circuit.
以上説明したように、本考案によれば、撮像管
とVFの偏向回路が共用化されているようなテレ
ビジヨンカメラ装置において、外部映像入力信号
の再生をVFで見るような場合等には別途設けた
AFC回路の出力で偏向を行うことができるよう
にしたので、どのよのな場合においても、消費電
力の削減ができると共に安定な再生画像を得るこ
とができる。 As explained above, according to the present invention, in a television camera device in which the image pickup tube and the VF deflection circuit are shared, a separate established
Since deflection can be performed using the output of the AFC circuit, power consumption can be reduced and stable reproduced images can be obtained in any case.
第１図は、撮像管とVFの偏向回路が共用化さ
れたカメラのブロツク構成図、第２図は、本考案
の一実施例のブロツク構成図である。
１……同期信号発生器、２……水平偏向回路、
３……垂直偏向回路、４……撮像管水平偏向コイ
ル、５……VF垂直偏向コイル、６……撮像管垂
直偏向コイル、７……VF垂直偏向コイル、８…
…撮像管、９……VF、１０……VF映像回路、１
１……切換コントロール回路、１２……AFC回
路（水平、垂直）、１３……切換回路。
FIG. 1 is a block diagram of a camera in which an image pickup tube and a VF deflection circuit are shared, and FIG. 2 is a block diagram of an embodiment of the present invention. 1... Synchronization signal generator, 2... Horizontal deflection circuit,
3... Vertical deflection circuit, 4... Image pickup tube horizontal deflection coil, 5... VF vertical deflection coil, 6... Image pickup tube vertical deflection coil, 7... VF vertical deflection coil, 8...
...Image tube, 9...VF, 10...VF video circuit, 1
1...Switching control circuit, 12...AFC circuit (horizontal, vertical), 13...Switching circuit.
Claims (1)
化されているテレビジヨンカメラ装置において、
前記偏向回路に供給するドライブ信号を、外部入
力信号のビユーフアインダでの再生時、内部同期
信号発生回路の出力信号から、別途設けた自動周
波数制御（AFC）回路の出力信号に切換え前記
偏向回路に供給する手段を備えたことを特徴とす
るテレビジヨンカメラ装置。 In a television camera device in which the image pickup tube and the viewfinder deflection circuit are shared,
When the external input signal is reproduced by the viewfinder, the drive signal supplied to the deflection circuit is switched from the output signal of an internal synchronization signal generation circuit to the output signal of a separately provided automatic frequency control (AFC) circuit and supplied to the deflection circuit. A television camera device characterized in that it is equipped with means for.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981009563U JPH0115255Y2 (en) | 1981-01-26 | 1981-01-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981009563U JPH0115255Y2 (en) | 1981-01-26 | 1981-01-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57122980U JPS57122980U (en) | 1982-07-31 |
| JPH0115255Y2 true JPH0115255Y2 (en) | 1989-05-08 |
Family
ID=29807683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1981009563U Expired JPH0115255Y2 (en) | 1981-01-26 | 1981-01-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0115255Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5140743U (en) * | 1974-09-20 | 1976-03-26 |
-
1981
- 1981-01-26 JP JP1981009563U patent/JPH0115255Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5140743U (en) * | 1974-09-20 | 1976-03-26 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57122980U (en) | 1982-07-31 |
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