JPS58190933A - Data photographing device of camera - Google Patents

Data photographing device of camera

Info

Publication number
JPS58190933A
JPS58190933A JP7401982A JP7401982A JPS58190933A JP S58190933 A JPS58190933 A JP S58190933A JP 7401982 A JP7401982 A JP 7401982A JP 7401982 A JP7401982 A JP 7401982A JP S58190933 A JPS58190933 A JP S58190933A
Authority
JP
Japan
Prior art keywords
voltage
signal
circuit
comparator
driving
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
JP7401982A
Other languages
Japanese (ja)
Inventor
Yoshito Ushiyama
Original Assignee
Seiko Epson Corp
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 Seiko Epson Corp filed Critical Seiko Epson Corp
Priority to JP7401982A priority Critical patent/JPS58190933A/en
Publication of JPS58190933A publication Critical patent/JPS58190933A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS 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
    • G03B17/00Details of cameras or camera bodies; Accessories therefor
    • G03B17/24Details of cameras or camera bodies; Accessories therefor with means for separately producing marks on the film, e.g. title, time of exposure
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS 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
    • G03B2217/00Details of cameras or camera bodies; Accessories therefor
    • G03B2217/007Details of energy supply or management
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS 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
    • G03B2217/00Details of cameras or camera bodies; Accessories therefor
    • G03B2217/24Details of cameras or camera bodies; Accessories therefor with means for separately producing marks on the film
    • G03B2217/242Details of the marking device
    • G03B2217/243Optical devices

Abstract

PURPOSE:To ensure the even quality of photographing even with use of a power supply having a big fluctuation of voltage, by using the output of a voltage comparator to decide the generating time of a driving signal for a driving circuit of a light emitting element of a data photographing mechanism. CONSTITUTION:A driving circuit 16 which turns on a lamp 17 generates a driving signal every time when a switch 18 is turned on based on the output signal of a counter group 12. Furthermore the circuit 16 has a function that can vary the width of the driving signal and is controlled by a voltag comparator 20. In other words, the comparator 20 compares its inside reference voltage with the voltage of a power supply 19 obtained when the signal of the circuit 16 is delivered. If this voltage is less than the reference voltage, the width of the signal is increased.
JP7401982A 1982-04-30 1982-04-30 Data photographing device of camera Pending JPS58190933A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7401982A JPS58190933A (en) 1982-04-30 1982-04-30 Data photographing device of camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7401982A JPS58190933A (en) 1982-04-30 1982-04-30 Data photographing device of camera

Publications (1)

Publication Number Publication Date
JPS58190933A true JPS58190933A (en) 1983-11-08

Family

ID=13534976

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7401982A Pending JPS58190933A (en) 1982-04-30 1982-04-30 Data photographing device of camera

Country Status (1)

Country Link
JP (1) JPS58190933A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4968568A (en) * 1972-11-06 1974-07-03

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4968568A (en) * 1972-11-06 1974-07-03

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