JPS5711329A - Automatic lens opening mechanism - Google Patents

Automatic lens opening mechanism

Info

Publication number
JPS5711329A
JPS5711329A JP8475580A JP8475580A JPS5711329A JP S5711329 A JPS5711329 A JP S5711329A JP 8475580 A JP8475580 A JP 8475580A JP 8475580 A JP8475580 A JP 8475580A JP S5711329 A JPS5711329 A JP S5711329A
Authority
JP
Japan
Prior art keywords
lens opening
fed
video signals
circuit
voltage
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
JP8475580A
Other languages
Japanese (ja)
Inventor
Yoshikuni Tanaka
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 JP8475580A priority Critical patent/JPS5711329A/en
Publication of JPS5711329A publication Critical patent/JPS5711329A/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
    • H04N23/60—Control of cameras or camera modules
    • H04N23/65—Control of camera operation in relation to power supply
    • H04N23/651—Control of camera operation in relation to power supply for reducing power consumption by affecting camera operations, e.g. sleep mode, hibernation mode or power off of selective parts of the camera

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Exposure Control For Cameras (AREA)

Abstract

PURPOSE:To prevent mechanical life from shortening and excess current from being fed by limiting the drive of lens opening for a longer period than the time required until video signals are stabilized when power is turned on through a timer circuit or when lens opening driving current is excessive. CONSTITUTION:When power 16 is turned on by closing a switch 17, the timer of a common circuit 24 outputs high level pulses for a longer period than the time required until video signals are stabilized to turn off the transistor 18 of a lens opening driving circuit 10. Therefore, current is not fed to a control circuit 19 which controls a lens opening driving motor 11 on the basis of the control voltage 9 with the differential voltage between the DC voltage proportional to the strength of video signals and the standard voltage, limiting the drive of lens opening caused by the unstable video signals. When overcurrent fed to the motor 11 through resistance 27 is detected, the overcurrent is also prevented from being fed to the motor 11.
JP8475580A 1980-06-23 1980-06-23 Automatic lens opening mechanism Pending JPS5711329A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8475580A JPS5711329A (en) 1980-06-23 1980-06-23 Automatic lens opening mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8475580A JPS5711329A (en) 1980-06-23 1980-06-23 Automatic lens opening mechanism

Publications (1)

Publication Number Publication Date
JPS5711329A true JPS5711329A (en) 1982-01-21

Family

ID=13839495

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8475580A Pending JPS5711329A (en) 1980-06-23 1980-06-23 Automatic lens opening mechanism

Country Status (1)

Country Link
JP (1) JPS5711329A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007315513A (en) * 2006-05-26 2007-12-06 Japan Power Fastening Co Ltd Self-boring screw

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007315513A (en) * 2006-05-26 2007-12-06 Japan Power Fastening Co Ltd Self-boring screw

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