JPS5740236A - Flash for camera - Google Patents

Flash for camera

Info

Publication number
JPS5740236A
JPS5740236A JP11537280A JP11537280A JPS5740236A JP S5740236 A JPS5740236 A JP S5740236A JP 11537280 A JP11537280 A JP 11537280A JP 11537280 A JP11537280 A JP 11537280A JP S5740236 A JPS5740236 A JP S5740236A
Authority
JP
Japan
Prior art keywords
converter
voltage
oscillation
transformer
diode
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.)
Granted
Application number
JP11537280A
Other languages
Japanese (ja)
Other versions
JPH0381139B2 (en
Inventor
Kazuyuki Kazami
Yoshiaki Otsubo
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.)
NIPPON KOUGAKU KOGYO KK
Nikon Corp
Nippon Chemical Industrial Co Ltd
Original Assignee
NIPPON KOUGAKU KOGYO KK
Nippon Chemical Industrial Co Ltd
Nippon Kogaku KK
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 NIPPON KOUGAKU KOGYO KK, Nippon Chemical Industrial Co Ltd, Nippon Kogaku KK filed Critical NIPPON KOUGAKU KOGYO KK
Priority to JP11537280A priority Critical patent/JPS5740236A/en
Publication of JPS5740236A publication Critical patent/JPS5740236A/en
Publication of JPH0381139B2 publication Critical patent/JPH0381139B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/338—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Stroboscope Apparatuses (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
  • Dc-Dc Converters (AREA)

Abstract

PURPOSE:To prevent light emitting from being reduced even if power voltage is low continuing the oscillation and voltage raising operation of a DC/DC converter for a fixed period after completing charging to a main capacitor then opening a bias circuit. CONSTITUTION:When a switch is turned on, a DC/DC converter composed of an oscillation transistor TR3, a transformer 4, a resistance 5, and a diode 6 starts oscillation by the momentally turning on of a start switch 8 and the secondary voltage of the transformer 4 is rectified by the diode 6 and applied to a main capacitor 7. When charging to the capacitor 7 proceeds, TR3 is suppressed, the converter 4 is stopped and a neon tube 17 is put on. When the voltage of a power source 1 being reduced, lighting of the ready light 17 turns on a TR18 and a timer circuit operates for a fixed period, the converter 4 continues to operate through a TR9 in this period. Therefore light emitting is prevented from being reduced even in this case.
JP11537280A 1980-08-22 1980-08-22 Flash for camera Granted JPS5740236A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11537280A JPS5740236A (en) 1980-08-22 1980-08-22 Flash for camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11537280A JPS5740236A (en) 1980-08-22 1980-08-22 Flash for camera

Publications (2)

Publication Number Publication Date
JPS5740236A true JPS5740236A (en) 1982-03-05
JPH0381139B2 JPH0381139B2 (en) 1991-12-27

Family

ID=14660891

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11537280A Granted JPS5740236A (en) 1980-08-22 1980-08-22 Flash for camera

Country Status (1)

Country Link
JP (1) JPS5740236A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0616950U (en) * 1992-08-04 1994-03-04 株式会社白金製作所 DC converter circuit

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5038532A (en) * 1973-06-28 1975-04-10
JPS5426076A (en) * 1977-07-28 1979-02-27 West Electric Co Electronic flashing device
JPS5581327A (en) * 1978-12-16 1980-06-19 Fuji Koeki Kk Power source device of flash device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5038532A (en) * 1973-06-28 1975-04-10
JPS5426076A (en) * 1977-07-28 1979-02-27 West Electric Co Electronic flashing device
JPS5581327A (en) * 1978-12-16 1980-06-19 Fuji Koeki Kk Power source device of flash device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0616950U (en) * 1992-08-04 1994-03-04 株式会社白金製作所 DC converter circuit

Also Published As

Publication number Publication date
JPH0381139B2 (en) 1991-12-27

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