JPS5683181A - Television camera device - Google Patents

Television camera device

Info

Publication number
JPS5683181A
JPS5683181A JP15989979A JP15989979A JPS5683181A JP S5683181 A JPS5683181 A JP S5683181A JP 15989979 A JP15989979 A JP 15989979A JP 15989979 A JP15989979 A JP 15989979A JP S5683181 A JPS5683181 A JP S5683181A
Authority
JP
Japan
Prior art keywords
output
circuit
adder
fed
iris
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
JP15989979A
Other languages
Japanese (ja)
Inventor
Hiroshi Nakajima
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP15989979A priority Critical patent/JPS5683181A/en
Publication of JPS5683181A publication Critical patent/JPS5683181A/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

Landscapes

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

Abstract

PURPOSE:To enable to obtain the best quality of a picture at all times, by changing an iris of lens within a range of iris where the performance of a lens is excellent and changing the gain of amplifier at other ranges. CONSTITUTION:Video signals R, G, B are fed to a level detector 10 to detect the peak level. The detected output from the detector 10 and the control signal from the iris servo remote control 11 are added at the adder 12. In the iris control, the output of the adder 12 is input to comparators 13, 14, and compared with the upper and lower limit set values, and the output is fed to the sample hold circuit 16 via the NAND circuit 15 to control the operation of the circuit 16 to receive the output of the adder 12. On the other hand, the output of the adder 12 is fed to one input terminal of the differential amplifier 17 and the output of the circuit 16 is fed to another input terminal. Further, when the circuit feeds the input as it is to the output side, the sample hold circuit 18 keeps the video gain control voltage to a constant value. Thus, the output of the circuit 18 is changed according to the output of the adder 12 in other range.
JP15989979A 1979-12-10 1979-12-10 Television camera device Pending JPS5683181A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15989979A JPS5683181A (en) 1979-12-10 1979-12-10 Television camera device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15989979A JPS5683181A (en) 1979-12-10 1979-12-10 Television camera device

Publications (1)

Publication Number Publication Date
JPS5683181A true JPS5683181A (en) 1981-07-07

Family

ID=15703598

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15989979A Pending JPS5683181A (en) 1979-12-10 1979-12-10 Television camera device

Country Status (1)

Country Link
JP (1) JPS5683181A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5711583A (en) * 1980-06-25 1982-01-21 Hitachi Ltd Television camera
JPS58111576A (en) * 1981-12-25 1983-07-02 Matsushita Electric Ind Co Ltd Television camera device
JPS58194469A (en) * 1982-05-07 1983-11-12 Canon Inc Method and device for image pickup
JPS6057777A (en) * 1983-09-08 1985-04-03 Canon Inc Image pickup device used together with lighting device
JPS6050568U (en) * 1983-09-14 1985-04-09 ミノルタ株式会社 electronic still camera
JPS6066579A (en) * 1983-09-22 1985-04-16 Sony Corp Video camera
JPH05127218A (en) * 1991-04-02 1993-05-25 Gold Star Co Ltd Circuit and method for adjusting opening and closing of cam coder iris diaphragm
JP2007104510A (en) * 2005-10-07 2007-04-19 Hitachi Kokusai Electric Inc Method and apparatus for sensitivity adjustment of television camera

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5711583A (en) * 1980-06-25 1982-01-21 Hitachi Ltd Television camera
JPH0212071B2 (en) * 1980-06-25 1990-03-16 Hitachi Ltd
JPS58111576A (en) * 1981-12-25 1983-07-02 Matsushita Electric Ind Co Ltd Television camera device
JPS58194469A (en) * 1982-05-07 1983-11-12 Canon Inc Method and device for image pickup
JPH0519355B2 (en) * 1982-05-07 1993-03-16 Canon Kk
JPS6057777A (en) * 1983-09-08 1985-04-03 Canon Inc Image pickup device used together with lighting device
JPS6050568U (en) * 1983-09-14 1985-04-09 ミノルタ株式会社 electronic still camera
JPS6066579A (en) * 1983-09-22 1985-04-16 Sony Corp Video camera
JPH05127218A (en) * 1991-04-02 1993-05-25 Gold Star Co Ltd Circuit and method for adjusting opening and closing of cam coder iris diaphragm
JP2007104510A (en) * 2005-10-07 2007-04-19 Hitachi Kokusai Electric Inc Method and apparatus for sensitivity adjustment of television camera
JP4612518B2 (en) * 2005-10-07 2011-01-12 株式会社日立国際電気 Electron multiplication type imaging apparatus and sensitivity adjustment method thereof

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