JPS54146479A - Device for lighting on discharge lamp - Google Patents
Device for lighting on discharge lampInfo
- Publication number
- JPS54146479A JPS54146479A JP5476678A JP5476678A JPS54146479A JP S54146479 A JPS54146479 A JP S54146479A JP 5476678 A JP5476678 A JP 5476678A JP 5476678 A JP5476678 A JP 5476678A JP S54146479 A JPS54146479 A JP S54146479A
- Authority
- JP
- Japan
- Prior art keywords
- lamp
- switch
- capacitor
- starter
- transformer
- 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 prevent spontaneous discharge, by connecting a phase-advancing capacitor between one end of a resistor and one end of a switch except for a parallel circuit consisting of a lamp and a starter. CONSTITUTION:A preheating current is picked out from a transformer T. A flashing switch S is connected to the secondary side of the transformer. The secondary voltage of the transformer falls to the vicinity of a minimum level necessary for the maintenance of discharge of the lamp depending on the fluctuation in the voltage of a power source. The stater Ig is coupled in parallel with the lamp L to start lighting on the lamp. The starter Ig has a resistor R connected in series with a parallel circuit consisting of a voltage-responsible element SSS and a capacitor Cs. The phase- advancing capacitor CM is connected between the switch and the node of the lamp L with the starter Ig to prevent the capacitor CM and the lamp L from forming a closed circuit when the switch S is opened. The spontaneous discharge is thus prevented.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5476678A JPS54146479A (en) | 1978-05-09 | 1978-05-09 | Device for lighting on discharge lamp |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5476678A JPS54146479A (en) | 1978-05-09 | 1978-05-09 | Device for lighting on discharge lamp |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54146479A true JPS54146479A (en) | 1979-11-15 |
Family
ID=12979888
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5476678A Pending JPS54146479A (en) | 1978-05-09 | 1978-05-09 | Device for lighting on discharge lamp |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54146479A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5072156A (en) * | 1990-11-29 | 1991-12-10 | North American Philips Corporation | Ballast circuit with means to disconnect power factor capacitor |
-
1978
- 1978-05-09 JP JP5476678A patent/JPS54146479A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5072156A (en) * | 1990-11-29 | 1991-12-10 | North American Philips Corporation | Ballast circuit with means to disconnect power factor capacitor |
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