JPS5640813A - Electric power unit for flash emitting device - Google Patents
Electric power unit for flash emitting deviceInfo
- Publication number
- JPS5640813A JPS5640813A JP11645779A JP11645779A JPS5640813A JP S5640813 A JPS5640813 A JP S5640813A JP 11645779 A JP11645779 A JP 11645779A JP 11645779 A JP11645779 A JP 11645779A JP S5640813 A JPS5640813 A JP S5640813A
- Authority
- JP
- Japan
- Prior art keywords
- electric power
- power source
- emitting device
- main capacitor
- transistor
- 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
Links
Landscapes
- Stroboscope Apparatuses (AREA)
- Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
Abstract
PURPOSE:To make possible the reduction in the charging time of the main capacitor of a flash emitting device by driving the flash device by either one of its internal electric power source or external power source or by both power sources in parallel. CONSTITUTION:When the switch Sw2 of the external electric power source 1 connected to a flash emitting device 2 is closed, the current flows to resistances R4, R5 and bias is applied between the base and emitter of a transistor TR, causing a transistor TR2 to conduct. Then, an oscillation circuit including a transistor TR3 oscillates and the oscillation output boosted by a transformer T1 is rectified and charges the main capacitor C5 of the device 2. If in this case the switch Sw1-1 of the device 2 is closed, the switch Sw1-2 also closes cooperatively to parallelly apply the internal electric power source current of the device 2 to the capacitor C5, thus the charging time of the main capacitor is reduced. It is also possible to charge the main capacitor only by one of the electric power sources of the devices 1, 2 according to the operation of the respective switches.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11645779A JPS5640813A (en) | 1979-09-10 | 1979-09-10 | Electric power unit for flash emitting device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11645779A JPS5640813A (en) | 1979-09-10 | 1979-09-10 | Electric power unit for flash emitting device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5640813A true JPS5640813A (en) | 1981-04-17 |
Family
ID=14687583
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11645779A Pending JPS5640813A (en) | 1979-09-10 | 1979-09-10 | Electric power unit for flash emitting device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5640813A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4941168B1 (en) * | 1969-05-09 | 1974-11-07 | ||
JPS5516583B2 (en) * | 1970-10-05 | 1980-05-02 |
-
1979
- 1979-09-10 JP JP11645779A patent/JPS5640813A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4941168B1 (en) * | 1969-05-09 | 1974-11-07 | ||
JPS5516583B2 (en) * | 1970-10-05 | 1980-05-02 |
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