JPS51117624A - Flashlight unit warning circuit - Google Patents

Flashlight unit warning circuit

Info

Publication number
JPS51117624A
JPS51117624A JP50042570A JP4257075A JPS51117624A JP S51117624 A JPS51117624 A JP S51117624A JP 50042570 A JP50042570 A JP 50042570A JP 4257075 A JP4257075 A JP 4257075A JP S51117624 A JPS51117624 A JP S51117624A
Authority
JP
Japan
Prior art keywords
warning circuit
dimmer
flashlight unit
unit warning
flashlight
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
JP50042570A
Other languages
English (en)
Inventor
Zenzo Nakamura
Shohei Otaki
Tokuichi Tsunekawa
Tadashi Ito
Hiroshi Aizawa
Takashi Uchiyama
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 JP50042570A priority Critical patent/JPS51117624A/ja
Priority to US05/671,736 priority patent/US4100459A/en
Publication of JPS51117624A publication Critical patent/JPS51117624A/ja
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
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/18—Signals indicating condition of a camera member or suitability of light
    • G03B17/20—Signals indicating condition of a camera member or suitability of light visible in viewfinder
    • 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
    • G03B15/00—Special procedures for taking photographs; Apparatus therefor
    • G03B15/02—Illuminating scene
    • G03B15/03—Combinations of cameras with lighting apparatus; Flash units
    • G03B15/05—Combinations of cameras with electronic flash apparatus; Electronic flash units
    • 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
    • G03B2215/00—Special procedures for taking photographs; Apparatus therefor
    • G03B2215/05—Combinations of cameras with electronic flash units

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
  • Stroboscope Apparatuses (AREA)
  • Exposure Control For Cameras (AREA)
  • Indication In Cameras, And Counting Of Exposures (AREA)
JP50042570A 1975-04-08 1975-04-08 Flashlight unit warning circuit Pending JPS51117624A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP50042570A JPS51117624A (en) 1975-04-08 1975-04-08 Flashlight unit warning circuit
US05/671,736 US4100459A (en) 1975-04-08 1976-03-30 Indicator circuit for electronic flash apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50042570A JPS51117624A (en) 1975-04-08 1975-04-08 Flashlight unit warning circuit

Publications (1)

Publication Number Publication Date
JPS51117624A true JPS51117624A (en) 1976-10-15

Family

ID=12639711

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50042570A Pending JPS51117624A (en) 1975-04-08 1975-04-08 Flashlight unit warning circuit

Country Status (2)

Country Link
US (1) US4100459A (ja)
JP (1) JPS51117624A (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55178133U (ja) * 1979-06-08 1980-12-20

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5910718Y2 (ja) * 1978-05-18 1984-04-03 ウエスト電気株式会社 自動調光電子閃光装置の報知装置
JPS55134824A (en) * 1979-04-09 1980-10-21 West Electric Co Ltd Automatic dimming strobe device
JPS57205998A (en) 1981-06-11 1982-12-17 Canon Kk Electronic flashing device
JPS5875132A (ja) * 1981-10-29 1983-05-06 Nippon Kogaku Kk <Nikon> 閃光装置の露光適否検出回路
US4494852A (en) * 1983-05-25 1985-01-22 Smith Jr Roland Photoflash detector
US4769595A (en) * 1986-06-30 1988-09-06 Tandem Computers, Inc. Pulse length indicator
US4969007A (en) * 1987-03-19 1990-11-06 Nikon Corporation Electronic flash apparatus for cameras
JP6204209B2 (ja) * 2014-01-27 2017-09-27 株式会社ジャパンディスプレイ 有機ｅｌ表示装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4850729A (ja) * 1971-10-20 1973-07-17
JPS4996723A (ja) * 1973-01-18 1974-09-12

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3340426A (en) * 1965-05-04 1967-09-05 Honeywell Inc Control system for terminating the discharge through a flash lamp
US3947720A (en) * 1969-03-08 1976-03-30 Loewe-Opta Gmbh Pulsed flash tube regulator using thyristor gate control
US3626401A (en) * 1969-03-19 1971-12-07 Berkey Photo Inc Fail to flash indicator circuit
US3688664A (en) * 1969-12-09 1972-09-05 Canon Kk Flash device for a camera
US3706911A (en) * 1971-01-28 1972-12-19 Honeywell Inc Correct exposure annunciator circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4850729A (ja) * 1971-10-20 1973-07-17
JPS4996723A (ja) * 1973-01-18 1974-09-12

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55178133U (ja) * 1979-06-08 1980-12-20

Also Published As

Publication number Publication date
US4100459A (en) 1978-07-11

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