FR2446048A1 - Dispositif a eclairs electriques - Google Patents
Dispositif a eclairs electriquesInfo
- Publication number
- FR2446048A1 FR2446048A1 FR7900282A FR7900282A FR2446048A1 FR 2446048 A1 FR2446048 A1 FR 2446048A1 FR 7900282 A FR7900282 A FR 7900282A FR 7900282 A FR7900282 A FR 7900282A FR 2446048 A1 FR2446048 A1 FR 2446048A1
- Authority
- FR
- France
- Prior art keywords
- oscillator
- voltage
- flashlight
- rectifier
- voltage converter
- 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
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
- 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
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/30—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp
- H05B41/32—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp for single flash operation
-
- 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)
- Dc-Dc Converters (AREA)
- Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
L'invention concerne un dispositif à éclairs électriques. Ce dispositif comporte une source d'alimentation continue, un tube à éclairs, un convertisseur de tension avec un circuit oscillateur, un transformateur oscillant, un circuit de démarrage d'oscillation, un circuit redresseur et un circuit de charge de condensateur. Le circuit oscillateur comporte un élément oscillant de forte résistance de fuite et le circuit de démarrage d'oscillation comporte un élément de commutation qui démarre l'oscillation et l'arrête au bout d'une période prédéterminée. L'invention s'applique notamment à des dispositifs associés avec des appareils photographiques.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7900282A FR2446048A1 (fr) | 1979-01-05 | 1979-01-05 | Dispositif a eclairs electriques |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7900282A FR2446048A1 (fr) | 1979-01-05 | 1979-01-05 | Dispositif a eclairs electriques |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2446048A1 true FR2446048A1 (fr) | 1980-08-01 |
FR2446048B3 FR2446048B3 (fr) | 1981-10-30 |
Family
ID=9220509
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7900282A Granted FR2446048A1 (fr) | 1979-01-05 | 1979-01-05 | Dispositif a eclairs electriques |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2446048A1 (fr) |
-
1979
- 1979-01-05 FR FR7900282A patent/FR2446048A1/fr active Granted
Also Published As
Publication number | Publication date |
---|---|
FR2446048B3 (fr) | 1981-10-30 |
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