JPS6035680U - Backlight correction device - Google Patents
Backlight correction deviceInfo
- Publication number
- JPS6035680U JPS6035680U JP12793283U JP12793283U JPS6035680U JP S6035680 U JPS6035680 U JP S6035680U JP 12793283 U JP12793283 U JP 12793283U JP 12793283 U JP12793283 U JP 12793283U JP S6035680 U JPS6035680 U JP S6035680U
- Authority
- JP
- Japan
- Prior art keywords
- agc
- control signal
- level
- correction device
- amplification
- 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
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来のテレビカメラのブロック図、第２図及び
第３図はともに同従来のテレビカメラに ′おける可
変利得増幅器の入出力特性図、第４図は本考案の逆光補
正装置を備えたテレビカメラの回路構成図、第５図は同
本考案に係るテレビカメラにおける利得制御増幅器の入
出力特性図である。
２・・・アイリス、３・・・撮像管、６・・・オートア
イリス駆動回路、７・・・マニュアルアイリス調整器、
８・・・利得制御増幅器、９・・・レベル検出回路、１
０′・・・制御信号発生回路、１２′・・・ＡＧＣオン
オフ制御スイッチ。Figure 1 is a block diagram of a conventional television camera, Figures 2 and 3 are input/output characteristic diagrams of a variable gain amplifier in the same conventional television camera, and Figure 4 is a block diagram of a conventional television camera equipped with the backlight correction device of the present invention. FIG. 5 is a circuit diagram of the television camera according to the present invention, and FIG. 5 is an input/output characteristic diagram of the gain control amplifier in the television camera according to the present invention. 2... Iris, 3... Image pickup tube, 6... Auto iris drive circuit, 7... Manual iris adjuster,
8... Gain control amplifier, 9... Level detection circuit, 1
0'...Control signal generation circuit, 12'...AGC on/off control switch.
Claims (1)
信号の増幅利得を制御信号に基いて制御する利得制御増
幅手段と、該増幅手段より得られる映像出力信号のレベ
ルを検出するレベル検出手゛ 段と、該レベル検出手
段による検出出力に基いてＡＧＣ用の前記制御信号を発
生する制御信号発生手段と、ＡＧＣ動作をオンオフする
ＡＧＣオンオフスイッチ手段とを備えたテレビカメラに
おいて、前記ＡＧＣオンオフスイッチ手段のオン時に前
記レベル検出手段にて所定値以上の映像出力信号を検出
した際にＡＧＣ動作を解除できるようにしたことを特徴
とする逆光補正装置。Gain control amplification means that includes an iris adjustment mechanism and controls the amplification gain of the video signal obtained from the image pickup tube based on a control signal, and level detection means that detects the level of the video output signal obtained from the amplification means. A television camera comprising: a control signal generating means for generating the control signal for AGC based on a detection output from the level detecting means; and an AGC on/off switch means for turning on/off the AGC operation. A backlight correction device characterized in that the AGC operation can be canceled when the level detection means detects a video output signal of a predetermined value or more when turned on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12793283U JPS6035680U (en) | 1983-08-18 | 1983-08-18 | Backlight correction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12793283U JPS6035680U (en) | 1983-08-18 | 1983-08-18 | Backlight correction device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6035680U true JPS6035680U (en) | 1985-03-12 |
Family
ID=30290389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12793283U Pending JPS6035680U (en) | 1983-08-18 | 1983-08-18 | Backlight correction device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6035680U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6160082A (en) * | 1984-08-31 | 1986-03-27 | Sony Corp | Image pickup device |
| JPS6232577A (en) * | 1985-08-05 | 1987-02-12 | Canon Inc | Processing method for still picture |
-
1983
- 1983-08-18 JP JP12793283U patent/JPS6035680U/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6160082A (en) * | 1984-08-31 | 1986-03-27 | Sony Corp | Image pickup device |
| JPS6232577A (en) * | 1985-08-05 | 1987-02-12 | Canon Inc | Processing method for still picture |
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