JPS62203573U - - Google Patents
Info
- Publication number
- JPS62203573U JPS62203573U JP9135386U JP9135386U JPS62203573U JP S62203573 U JPS62203573 U JP S62203573U JP 9135386 U JP9135386 U JP 9135386U JP 9135386 U JP9135386 U JP 9135386U JP S62203573 U JPS62203573 U JP S62203573U
- Authority
- JP
- Japan
- Prior art keywords
- iris control
- video signal
- control circuit
- circuit
- video camera
- 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
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Description
第１図は本考案によるオートアイリス制御回路
の一実施例、第２図はアイリス制御用の映像信号
と本考案により圧縮されたアイリス制御信号とを
示す波形図、第３図、第４図、第５図は本考案に
よるオートアイリス制御回路のハイライト圧縮回
路の異なる回路例である。
１……ハイライト圧縮回路、２……バツフアト
ランジスタ、３……検波整流回路、４……アイリ
スドライブアンプ、５……アイリスモータ。
FIG. 1 is an embodiment of an auto iris control circuit according to the present invention, FIG. 2 is a waveform diagram showing a video signal for iris control and an iris control signal compressed according to the present invention, and FIGS. FIG. 5 shows different circuit examples of the highlight compression circuit of the auto-iris control circuit according to the present invention. 1...Highlight compression circuit, 2...Buffer transistor, 3...Detection rectifier circuit, 4...Iris drive amplifier, 5...Iris motor.
Claims (1)
カメラのオートアイリス制御回路において、アイ
リス制御に用いる映像信号の白ピーク部分を圧縮
するハイライト圧縮回路を設けたことを特徴とす
るビデオカメラのオートアイリス制御回路。 An auto iris control circuit for a video camera that performs iris control based on a video signal, characterized in that the auto iris control circuit for a video camera is provided with a highlight compression circuit that compresses a white peak portion of the video signal used for iris control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9135386U JPS62203573U (en) | 1986-06-17 | 1986-06-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9135386U JPS62203573U (en) | 1986-06-17 | 1986-06-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62203573U true JPS62203573U (en) | 1987-12-25 |
Family
ID=30952058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9135386U Pending JPS62203573U (en) | 1986-06-17 | 1986-06-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62203573U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02149076A (en) * | 1988-11-30 | 1990-06-07 | Canon Inc | Electronic still camera |
-
1986
- 1986-06-17 JP JP9135386U patent/JPS62203573U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02149076A (en) * | 1988-11-30 | 1990-06-07 | Canon Inc | Electronic still camera |
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