JPS642299A - Lighting device for discharge lamp - Google Patents
Lighting device for discharge lampInfo
- Publication number
- JPS642299A JPS642299A JP15819787A JP15819787A JPS642299A JP S642299 A JPS642299 A JP S642299A JP 15819787 A JP15819787 A JP 15819787A JP 15819787 A JP15819787 A JP 15819787A JP S642299 A JPS642299 A JP S642299A
- Authority
- JP
- Japan
- Prior art keywords
- discharge lamp
- constant
- switching element
- voltage switching
- nonfeeding
- 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
Abstract
PURPOSE:To prevent a cataphoretic phenomenon from occurring by installing a diode and a constant-voltage switching element in series between terminals at the nonfeeding side of a filament electrode of a discharge lamp, connecting them to a power source in the forward direction, and also connecting an induc tor in parallel with the constant-voltage switching element. CONSTITUTION:A diode 17 and a constant-voltage switching element 18 are installed in series between terminals at the nonfeeding side of a discharge lamp 15 and connected to a power source in the forward direction, then an inductor 19 is connected thereto in parallel with this constant-voltage switching element 18. Accordingly, a DC component to be contained in a current flowing in a discharge lamp load circuit 3 is bypasseed by the diode 17 and the inductor 19 connected to the nonfeeding side of the discharge lamp 15, and thereby a high frequency current component only flows in the discharge lamp 15. With this constitution, a cataphoretic phenomenon is prevented from occurring.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62-158197A JPH012299A (en) | 1987-06-25 | discharge lamp lighting device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62-158197A JPH012299A (en) | 1987-06-25 | discharge lamp lighting device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS642299A true JPS642299A (en) | 1989-01-06 |
JPH012299A JPH012299A (en) | 1989-01-06 |
Family
ID=
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