JPS5735478A - Signal processing circuit for video camera - Google Patents

Signal processing circuit for video camera

Info

Publication number
JPS5735478A
JPS5735478A JP11022480A JP11022480A JPS5735478A JP S5735478 A JPS5735478 A JP S5735478A JP 11022480 A JP11022480 A JP 11022480A JP 11022480 A JP11022480 A JP 11022480A JP S5735478 A JPS5735478 A JP S5735478A
Authority
JP
Japan
Prior art keywords
trs
change
luminous intensity
level
gamma
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
JP11022480A
Other languages
Japanese (ja)
Other versions
JPH0124393B2 (en
Inventor
Masaru Noda
Michio Ogimoto
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP11022480A priority Critical patent/JPS5735478A/en
Publication of JPS5735478A publication Critical patent/JPS5735478A/en
Publication of JPH0124393B2 publication Critical patent/JPH0124393B2/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
    • H04N23/80—Camera processing pipelines; Components thereof
    • H04N23/82—Camera processing pipelines; Components thereof for controlling camera response irrespective of the scene brightness, e.g. gamma correction

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Picture Signal Circuits (AREA)

Abstract

PURPOSE:To realize the same gamma characteristic independently of the change in luminous intensity, by moving the set point level of the approximate gamma characteristic corresponding to the change in the gain of an AGC amplifier circuit at the change in the luminous intensity. CONSTITUTION:When an output signal of an AGC detection circuit 62 is decreased through the decrease in the luminous intensity, a transistor TR702 starts conduction, TRs 703-707 start operation and a current corresponding to the collector current of a TR702 flows to the TRs 705-707. In this case, the base voltage of TRs 103, 104 is decreased by the voltage drop of resistors 717, 718 through a current flowing to the collector of the TRs 706, 707. That is, the level of the gamma set voltage can be lowered equivalently and the control of the gamma set level corresponding to the gain change of an AGC amplifier circuit 61 is made.
JP11022480A 1980-08-13 1980-08-13 Signal processing circuit for video camera Granted JPS5735478A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11022480A JPS5735478A (en) 1980-08-13 1980-08-13 Signal processing circuit for video camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11022480A JPS5735478A (en) 1980-08-13 1980-08-13 Signal processing circuit for video camera

Publications (2)

Publication Number Publication Date
JPS5735478A true JPS5735478A (en) 1982-02-26
JPH0124393B2 JPH0124393B2 (en) 1989-05-11

Family

ID=14530225

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11022480A Granted JPS5735478A (en) 1980-08-13 1980-08-13 Signal processing circuit for video camera

Country Status (1)

Country Link
JP (1) JPS5735478A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59226393A (en) * 1983-06-06 1984-12-19 株式会社精工舎 Alarm timepiece
JPS6063898U (en) * 1983-10-07 1985-05-04 株式会社精工舎 Alarm clock striking device
JPS60191095U (en) * 1984-05-29 1985-12-18 リズム時計工業株式会社 Clock striking device
JPS6190575A (en) * 1984-10-09 1986-05-08 Matsushita Electric Ind Co Ltd Video signal processor
JPS6221198A (en) * 1985-07-22 1987-01-29 藤倉電工株式会社 Bell
JPH02203677A (en) * 1989-02-01 1990-08-13 Canon Inc Image pickup device
JPH056498U (en) * 1991-07-12 1993-01-29 株式会社精工舎 Electromagnetic bell drive

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59226393A (en) * 1983-06-06 1984-12-19 株式会社精工舎 Alarm timepiece
JPH0581916B2 (en) * 1983-06-06 1993-11-16 Seikosha Kk
JPS6063898U (en) * 1983-10-07 1985-05-04 株式会社精工舎 Alarm clock striking device
JPH0419599Y2 (en) * 1983-10-07 1992-05-01
JPS60191095U (en) * 1984-05-29 1985-12-18 リズム時計工業株式会社 Clock striking device
JPS6190575A (en) * 1984-10-09 1986-05-08 Matsushita Electric Ind Co Ltd Video signal processor
JPH0582784B2 (en) * 1984-10-09 1993-11-22 Matsushita Electric Ind Co Ltd
JPS6221198A (en) * 1985-07-22 1987-01-29 藤倉電工株式会社 Bell
JPH0476116B2 (en) * 1985-07-22 1992-12-02 Fujikura Denko Kk
JPH02203677A (en) * 1989-02-01 1990-08-13 Canon Inc Image pickup device
JPH056498U (en) * 1991-07-12 1993-01-29 株式会社精工舎 Electromagnetic bell drive

Also Published As

Publication number Publication date
JPH0124393B2 (en) 1989-05-11

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