JPS63118025U - - Google Patents
Info
- Publication number
- JPS63118025U JPS63118025U JP1030187U JP1030187U JPS63118025U JP S63118025 U JPS63118025 U JP S63118025U JP 1030187 U JP1030187 U JP 1030187U JP 1030187 U JP1030187 U JP 1030187U JP S63118025 U JPS63118025 U JP S63118025U
- Authority
- JP
- Japan
- Prior art keywords
- counter
- converter
- aperture
- output
- automatic aperture
- 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
- 238000010586 diagram Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
Description
第１図は、本考案の一実施例の回路ブロツク図
、第２図は実施例の絞りレベルの調整状況を示す
図、第３図は従来例の絞りレベルの調整状況を示
す図、第４図は審動絞り機構のブロツク図である
。
１１……レンズ、１２……絞り環、１３……撮
像素子、１４……ビデオ信号、１５……平均値検
出回路、１６……絞り駆動回路、１７……Ｄ／Ａ
変換器、１８……アツプダウンカウンタ、１９…
…クロツク、２０……制御信号、２１……目標調
整レベル、２２……手動調整レベル、２３……絞
りレベル。
Fig. 1 is a circuit block diagram of an embodiment of the present invention, Fig. 2 is a diagram showing the aperture level adjustment situation of the embodiment, Fig. 3 is a diagram showing the aperture level adjustment situation of the conventional example, and Fig. 4 is a diagram showing the aperture level adjustment situation of the conventional example. The figure is a block diagram of the motion aperture mechanism. 11...Lens, 12...Aperture ring, 13...Imaging element, 14...Video signal, 15...Average value detection circuit, 16...Aperture drive circuit, 17...D/A
Converter, 18...Up-down counter, 19...
...Clock, 20...Control signal, 21...Target adjustment level, 22...Manual adjustment level, 23...Aperture level.
Claims (1)
、手動操作のときに作動させる制御回路であつて
、 一定のクロツクを入力するアツプダウンカウン
タと、前記カウンタの出力をＤ／Ａ変換するＤ／
Ａ変換器とを有し、前記カウンタの切替・カウン
ト中止により、前記Ｄ／Ａ変換器の出力を調整し
、自動絞り機構内の絞り駆動回路に駆動電流もし
くは電圧を供給することを特徴とする自動絞り制
御回路。[Claims for Utility Model Registration] A control circuit that is incorporated into an ammeter-type automatic aperture mechanism of a video camera and is activated during manual operation, which comprises an up-down counter that inputs a constant clock, and an output of the counter that is D. /A convert D/
A converter, and by switching the counter and stopping counting, the output of the D/A converter is adjusted, and a drive current or voltage is supplied to an aperture drive circuit in an automatic aperture mechanism. Automatic aperture control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1030187U JPS63118025U (en) | 1987-01-26 | 1987-01-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1030187U JPS63118025U (en) | 1987-01-26 | 1987-01-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63118025U true JPS63118025U (en) | 1988-07-30 |
Family
ID=30796465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1030187U Pending JPS63118025U (en) | 1987-01-26 | 1987-01-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63118025U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02187737A (en) * | 1989-01-13 | 1990-07-23 | Victor Co Of Japan Ltd | Iris controller |
-
1987
- 1987-01-26 JP JP1030187U patent/JPS63118025U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02187737A (en) * | 1989-01-13 | 1990-07-23 | Victor Co Of Japan Ltd | Iris controller |
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