JPS5462671A - Starting device for discharge lamp - Google Patents
Starting device for discharge lampInfo
- Publication number
- JPS5462671A JPS5462671A JP12871277A JP12871277A JPS5462671A JP S5462671 A JPS5462671 A JP S5462671A JP 12871277 A JP12871277 A JP 12871277A JP 12871277 A JP12871277 A JP 12871277A JP S5462671 A JPS5462671 A JP S5462671A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- lamp
- capacitor
- impedance
- thyristor
- 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
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
PURPOSE:To minimize the voltage applied across the circuit through the suspension of triggering of a semi-conductor switching element by using an impedance voltage induced across the secondary coil of a stabilizer after lighting of a discharge lamp with the actuation of an impedance stabilizer. CONSTITUTION:When the power is turned on, capacitors Cp30 and C30 are charged through a diode D31. When the terminal voltage of the capacitor C30 reaches the breakover voltage of a trigger element Tr30, a thyristor T30 conducts to allow the capacitor C30 to discharge electricity. Thus, a pulse voltage is induced across the secondary coil of a choke B30 to light a lamp L30. After lighting, a lamp current flows to generate an impedance voltage across the choke B30 which charges the capacitor C30 in the reverse direction through a diode D32 and a resistor R33. Accordingly, the thyristor Tr30 fails to be triggered so that no pulse voltage is developed while the lamp is on.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12871277A JPS5462671A (en) | 1977-10-28 | 1977-10-28 | Starting device for discharge lamp |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12871277A JPS5462671A (en) | 1977-10-28 | 1977-10-28 | Starting device for discharge lamp |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5462671A true JPS5462671A (en) | 1979-05-19 |
Family
ID=14991554
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12871277A Pending JPS5462671A (en) | 1977-10-28 | 1977-10-28 | Starting device for discharge lamp |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5462671A (en) |
-
1977
- 1977-10-28 JP JP12871277A patent/JPS5462671A/en active Pending
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