JPS5767903A - Output control method of focus detector - Google Patents

Output control method of focus detector

Info

Publication number
JPS5767903A
JPS5767903A JP14478180A JP14478180A JPS5767903A JP S5767903 A JPS5767903 A JP S5767903A JP 14478180 A JP14478180 A JP 14478180A JP 14478180 A JP14478180 A JP 14478180A JP S5767903 A JPS5767903 A JP S5767903A
Authority
JP
Japan
Prior art keywords
output
display
circuit
state
gates
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
JP14478180A
Other languages
Japanese (ja)
Inventor
Shinji Sakai
Nobuhiko Shinoda
Mitsuya Hosoe
Takao Kinoshita
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP14478180A priority Critical patent/JPS5767903A/en
Priority to DE19813141182 priority patent/DE3141182A1/en
Publication of JPS5767903A publication Critical patent/JPS5767903A/en
Priority to US06/767,668 priority patent/US4641942A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B3/00—Focusing arrangements of general interest for cameras, projectors or printers
    • G03B3/10—Power-operated focusing

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

PURPOSE:To obtain more stabilized output for a focus detecting device using a photoelectric transducer, by inhibiting the output corresponding to the focus adjusting state, i.e. the funal output of the focus detecting circuit according to the change of the above-mensioned transducer or keeping the output in the previous state. CONSTITUTION:An inverter 45 of a display control circuit CONT sets the outputs of AND gates 25-27 at low levels to inhibit a display when the signal supplied from a storing time control circuit AGC. When the peak of a picture signal is low, the display output is transmitted as it is to a display circuit DISP. If a D latching circuit is used in place of AND gates 25-27, i.e. the output of each arithmetic circuit CPU and the output of an inverter 24 are supplied to the input terminal of the D latching circuit and to a strobe input respectively, the display is inhibited when the output of a comparator COMPA (not shown in the diagram) is set at a high level. This state of inhibition is kept until the output of the COMPA changes. As a result, more stabilized output is obtained.
JP14478180A 1980-10-16 1980-10-16 Output control method of focus detector Pending JPS5767903A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP14478180A JPS5767903A (en) 1980-10-16 1980-10-16 Output control method of focus detector
DE19813141182 DE3141182A1 (en) 1980-10-16 1981-10-16 "FOCUS DETECTING SYSTEM"
US06/767,668 US4641942A (en) 1980-10-16 1985-08-21 Focus detecting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14478180A JPS5767903A (en) 1980-10-16 1980-10-16 Output control method of focus detector

Publications (1)

Publication Number Publication Date
JPS5767903A true JPS5767903A (en) 1982-04-24

Family

ID=15370282

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14478180A Pending JPS5767903A (en) 1980-10-16 1980-10-16 Output control method of focus detector

Country Status (1)

Country Link
JP (1) JPS5767903A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4696147A (en) * 1986-12-19 1987-09-29 Tokiwa Kogyo Co., Ltd. Film tubing device for use in packaging apparatus

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5315131A (en) * 1976-07-27 1978-02-10 Canon Inc Detecting method for sharpness of objective image

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5315131A (en) * 1976-07-27 1978-02-10 Canon Inc Detecting method for sharpness of objective image

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4696147A (en) * 1986-12-19 1987-09-29 Tokiwa Kogyo Co., Ltd. Film tubing device for use in packaging apparatus

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