JPS5651163A - Image pickup tube protecting device of monitor system - Google Patents

Image pickup tube protecting device of monitor system

Info

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
Application number
JP12827579A
Other languages
Japanese (ja)
Inventor
Yoshihiko Matsui
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP12827579A priority Critical patent/JPS5651163A/en
Publication of JPS5651163A publication Critical patent/JPS5651163A/en
Pending legal-status Critical Current

Links

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.
JP12827579A 1979-10-04 1979-10-04 Image pickup tube protecting device of monitor system Pending JPS5651163A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63187111U (en) * 1987-05-19 1988-11-30

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63187111U (en) * 1987-05-19 1988-11-30

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