JPS5780875A - Auto-focusing device for television camera - Google Patents

Auto-focusing device for television camera

Info

Publication number
JPS5780875A
JPS5780875A JP55156889A JP15688980A JPS5780875A JP S5780875 A JPS5780875 A JP S5780875A JP 55156889 A JP55156889 A JP 55156889A JP 15688980 A JP15688980 A JP 15688980A JP S5780875 A JPS5780875 A JP S5780875A
Authority
JP
Japan
Prior art keywords
lens
focusing mechanism
motor
driving
region
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
JP55156889A
Other languages
Japanese (ja)
Inventor
Yoshinori Kitamura
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP55156889A priority Critical patent/JPS5780875A/en
Publication of JPS5780875A publication Critical patent/JPS5780875A/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
    • H04N23/67—Focus control based on electronic image sensor signals
    • H04N23/673—Focus control based on electronic image sensor signals based on contrast or high frequency components of image signals, e.g. hill climbing method

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

PURPOSE:To enhance the driving precision of a lens, by detecting the driving direction of the focusing mechanism of the lens in the first optical focus detector and driving the focusing mechanism of the lens so as to make a signal of high- band components of the signal obtained from an image pickup element maximum. CONSTITUTION:When a lens focusing mechanism is placed in a region A, it is discriminated that the driving direction of the motor of an optical focus detector 21 and a direction detector 28 is the direction of an arrow P, and the motor is driven. Since the output signal of a peak detector increases according as the time elapses, the output of a subtractor 27 becomes a positive signal, and the motor is driven continuously. When the lens focusing mechanism enters into a region B, the output of the subtractor 27 becomes 0, and the motor is stopped, and thus, the lens is focused to an object. When the lens focusing mechanism is placed in a region C, the lens is focused by the same operation.
JP55156889A 1980-11-06 1980-11-06 Auto-focusing device for television camera Pending JPS5780875A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55156889A JPS5780875A (en) 1980-11-06 1980-11-06 Auto-focusing device for television camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55156889A JPS5780875A (en) 1980-11-06 1980-11-06 Auto-focusing device for television camera

Publications (1)

Publication Number Publication Date
JPS5780875A true JPS5780875A (en) 1982-05-20

Family

ID=15637602

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55156889A Pending JPS5780875A (en) 1980-11-06 1980-11-06 Auto-focusing device for television camera

Country Status (1)

Country Link
JP (1) JPS5780875A (en)

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