JPS5680034A - Light quantity control circuit of strobe light emitting device - Google Patents
Light quantity control circuit of strobe light emitting deviceInfo
- Publication number
- JPS5680034A JPS5680034A JP15708379A JP15708379A JPS5680034A JP S5680034 A JPS5680034 A JP S5680034A JP 15708379 A JP15708379 A JP 15708379A JP 15708379 A JP15708379 A JP 15708379A JP S5680034 A JPS5680034 A JP S5680034A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- capacitor
- light
- light emitting
- output
- 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
Landscapes
- Stroboscope Apparatuses (AREA)
- Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
Abstract
PURPOSE:To control the quantity of light by providing a voltage detecting circuit which obtains at least one voltage corresponding to the charging voltage of a capacitor and forms the output corresponding to the result of the comparison of both these voltages and rapidly dropping the charging voltage of the capacitor down to a predetermined value by this. CONSTITUTION:When a discharge light emitting tube Xe emits light, the charging voltage of a capacitor C drops rapidly, and the voltage of a voltage setting circuit connected across terminals A and B drops rapidly as well. A comparator COMP3 compares the output of a constant voltage circuit and the output of the voltage setting circuit and causes a light emitting diode LED to light and a photo operating switch PS to go ON, whereby the capacitor C is charged. In the case of performing the next light emission at a lower quantity of light, the voltage of the noniversion input terminal of the comparator COMP2 is adjusted by operating the variable resistance VR of the voltage setting circuit, by which the charging voltage of the capacitor C is lowered and the quantity of light emission of the discharge light emitting tube Xe is decreased.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15708379A JPS5680034A (en) | 1979-12-04 | 1979-12-04 | Light quantity control circuit of strobe light emitting device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15708379A JPS5680034A (en) | 1979-12-04 | 1979-12-04 | Light quantity control circuit of strobe light emitting device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5680034A true JPS5680034A (en) | 1981-07-01 |
JPS6239409B2 JPS6239409B2 (en) | 1987-08-22 |
Family
ID=15641868
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15708379A Granted JPS5680034A (en) | 1979-12-04 | 1979-12-04 | Light quantity control circuit of strobe light emitting device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5680034A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56122018A (en) * | 1980-02-29 | 1981-09-25 | Olympus Optical Co Ltd | Power supply circuit of stroboscopic device |
-
1979
- 1979-12-04 JP JP15708379A patent/JPS5680034A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56122018A (en) * | 1980-02-29 | 1981-09-25 | Olympus Optical Co Ltd | Power supply circuit of stroboscopic device |
Also Published As
Publication number | Publication date |
---|---|
JPS6239409B2 (en) | 1987-08-22 |
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