JPS5651163A - Image pickup tube protecting device of monitor system - Google Patents
Image pickup tube protecting device of monitor systemInfo
- Publication number
- JPS5651163A JPS5651163A JP12827579A JP12827579A JPS5651163A JP S5651163 A JPS5651163 A JP S5651163A JP 12827579 A JP12827579 A JP 12827579A JP 12827579 A JP12827579 A JP 12827579A JP S5651163 A JPS5651163 A JP S5651163A
- Authority
- JP
- Japan
- Prior art keywords
- light
- television camera
- image pickup
- pickup tube
- photocoupler
- 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
- 230000001419 dependent effect Effects 0.000 abstract 2
- 101100220616 Caenorhabditis elegans chk-2 gene Proteins 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/75—Circuitry for compensating brightness variation in the scene by influencing optical camera components
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
Abstract
PURPOSE:To make it possible to protect the image pickup tube of the television camera from the permanent printing phenomenon dependent upon an excessive incident light, by stopping down the stop of the television camera, which does not monitor, to a maximum. CONSTITUTION:In respect to the selected television camera, light emitting part 23 consisting of light emission diodes and so on in photocoupler 21 emits a light, and light receiving part 22 consisting of photodiodes and so on becomes conductive, and exposure adjustment dependent upon cds 1 is performed. In respect to the television camera which is not selected, light emitting part 23 does not emit a light and light receiving part 22 is held high-impedance because electric power is not supplied to photocoupler 21. Under this state, the base potential of transistor 5 rises up to the part near power source terminal 3 in the + side, and as the result, transistor 5 becomes conductive, and motor 9 is driven until automatic stop switch 10 is operated, and the stop of the television camera is stopped down to a maximum.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12827579A JPS5651163A (en) | 1979-10-04 | 1979-10-04 | Image pickup tube protecting device of monitor system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12827579A JPS5651163A (en) | 1979-10-04 | 1979-10-04 | Image pickup tube protecting device of monitor system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5651163A true JPS5651163A (en) | 1981-05-08 |
Family
ID=14980794
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12827579A Pending JPS5651163A (en) | 1979-10-04 | 1979-10-04 | Image pickup tube protecting device of monitor system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5651163A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63187111U (en) * | 1987-05-19 | 1988-11-30 |
-
1979
- 1979-10-04 JP JP12827579A patent/JPS5651163A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63187111U (en) * | 1987-05-19 | 1988-11-30 |
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