JPS55124127A - Light quantity control flash emitting device - Google Patents
Light quantity control flash emitting deviceInfo
- Publication number
- JPS55124127A JPS55124127A JP3094279A JP3094279A JPS55124127A JP S55124127 A JPS55124127 A JP S55124127A JP 3094279 A JP3094279 A JP 3094279A JP 3094279 A JP3094279 A JP 3094279A JP S55124127 A JPS55124127 A JP S55124127A
- Authority
- JP
- Japan
- Prior art keywords
- lamp
- switching element
- circuit
- dimming
- discharge
- 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 make possible giving an alarm to the user by producing light or sound by the charge remained in the commutation capacitor of the circuit when the flash emission light quantity of a flash lamp was not dimmed. CONSTITUTION:A trigger circuit TG is operated by the discharge signal sig and a switching element SW1 closes the circuit, causing a discharge lamp Xe to discharge. A switching element SW2 is conducted by the dimming signal from a dimming circuit IC and the charging charge of a commutation capacitor C0 is applied as reverse bias to the switching element SW1, by which the lamp is forcefully put out. The potential of A of this time is lower than the potential of B and therefore a warning lamp GL does not light. When the lamp Xe discharges and no dimming was accomplished, the switching element SW2 is not conducted and the charge is held accumulated at the first polarity in the commutation capacitor C0 and therefore the warning lamp is lighted. It is also possible to use a sound producer in place of the warning lamp.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54030942A JPS5911090B2 (en) | 1979-03-16 | 1979-03-16 | Light amount control flash generator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54030942A JPS5911090B2 (en) | 1979-03-16 | 1979-03-16 | Light amount control flash generator |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP58205460A Division JPS6083922A (en) | 1983-10-31 | 1983-10-31 | Flash light emitting device controlling quantity of light |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55124127A true JPS55124127A (en) | 1980-09-25 |
JPS5911090B2 JPS5911090B2 (en) | 1984-03-13 |
Family
ID=12317725
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP54030942A Expired JPS5911090B2 (en) | 1979-03-16 | 1979-03-16 | Light amount control flash generator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5911090B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03115590U (en) * | 1990-03-13 | 1991-11-29 |
-
1979
- 1979-03-16 JP JP54030942A patent/JPS5911090B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5911090B2 (en) | 1984-03-13 |
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