JPS574667A - Pickup device - Google Patents

Pickup device

Info

Publication number
JPS574667A
JPS574667A JP7872680A JP7872680A JPS574667A JP S574667 A JPS574667 A JP S574667A JP 7872680 A JP7872680 A JP 7872680A JP 7872680 A JP7872680 A JP 7872680A JP S574667 A JPS574667 A JP S574667A
Authority
JP
Japan
Prior art keywords
rectifying circuit
output
peak value
comparator
value
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.)
Granted
Application number
JP7872680A
Other languages
Japanese (ja)
Other versions
JPS642270B2 (en
Inventor
Hiroshi Fukui
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP7872680A priority Critical patent/JPS574667A/en
Publication of JPS574667A publication Critical patent/JPS574667A/en
Publication of JPS642270B2 publication Critical patent/JPS642270B2/ja
Granted 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 obtain a rectification characteristic as desired, by giving a peak value rectification to the output of an amplifier in an automatic iris control loop and switching a time constant or a rectifying circuit with the peak value and in accordance with the value of rate K occupying the bright area to the entire picture. CONSTITUTION:The output of an amplifier 5 in an iris control loop is supplied to a peak value rectifying circuit 20, and the output of peak value rectification is supplied to a comparator 21 to be compared with the set reference level VT. When the output of the comparator 21 is at a low level with a diode D22 turned on, a rectifying circuit consisting of a transistor TR14, resistance 13, 15 and 17 plus a capacitor C18 is turned into a peak value rectifying circuit. On the other hand, the rectifying circuit is changed into a mean value rectifying circuit when the output of the comparator 21 is at a high level with the D22 turned off. Then the comparing reference level VT of the comparator 21 is decided freely according to the value of rate K occupying the bright area to the entire picture.
JP7872680A 1980-06-11 1980-06-11 Pickup device Granted JPS574667A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7872680A JPS574667A (en) 1980-06-11 1980-06-11 Pickup device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7872680A JPS574667A (en) 1980-06-11 1980-06-11 Pickup device

Publications (2)

Publication Number Publication Date
JPS574667A true JPS574667A (en) 1982-01-11
JPS642270B2 JPS642270B2 (en) 1989-01-17

Family

ID=13669880

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7872680A Granted JPS574667A (en) 1980-06-11 1980-06-11 Pickup device

Country Status (1)

Country Link
JP (1) JPS574667A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58153464A (en) * 1982-03-09 1983-09-12 Copal Co Ltd Still camera using solid state image pickup element
EP0269053A2 (en) * 1986-11-25 1988-06-01 Matsushita Electric Industrial Co., Ltd. Light signal control circuit for image pick-up apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0376378U (en) * 1989-11-27 1991-07-31
JPH03112784U (en) * 1990-01-30 1991-11-18

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58153464A (en) * 1982-03-09 1983-09-12 Copal Co Ltd Still camera using solid state image pickup element
EP0269053A2 (en) * 1986-11-25 1988-06-01 Matsushita Electric Industrial Co., Ltd. Light signal control circuit for image pick-up apparatus

Also Published As

Publication number Publication date
JPS642270B2 (en) 1989-01-17

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