JPS5477478A - Discharge lamp lighting apparatus - Google Patents
Discharge lamp lighting apparatusInfo
- Publication number
- JPS5477478A JPS5477478A JP14537777A JP14537777A JPS5477478A JP S5477478 A JPS5477478 A JP S5477478A JP 14537777 A JP14537777 A JP 14537777A JP 14537777 A JP14537777 A JP 14537777A JP S5477478 A JPS5477478 A JP S5477478A
- Authority
- JP
- Japan
- Prior art keywords
- discharge lamp
- switching element
- turned
- capacitor
- voltage
- 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 provide a discharge lamp lighting apparatus, in which pulse voltage for giving a negative resistance to a discharge lamp is impressed to the discharge lamp after a switching element is turned ON, whereby timing when the switching element is turned OFF can be stabilized.
CONSTITUTION: When a switching element 5 is energized by control circuit 7, an oscillatory charging current is passed through a series circuit consisting of AC power source 1, inductance element 2, capacitor 3 and switching element 5. As the result, voltage-responsiveswitch 13 is turned ON, so that charge of capacitor 12 is passed via said voltage-responsive switch 13 to inductance element 2 and winding 14 wound around the same iron core as that of inductance element 2, and thus pulse voltage is generated in the inductance element 2. When this pulse voltage is impressed on discharge lamp 4, it immediately represents a negative resistance. Charge of capacitor 3 is discharged via discharge lamp 4 and switching element 5, whereupon switching element 5 is turned OFF.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14537777A JPS5477478A (en) | 1977-11-30 | 1977-11-30 | Discharge lamp lighting apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14537777A JPS5477478A (en) | 1977-11-30 | 1977-11-30 | Discharge lamp lighting apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5477478A true JPS5477478A (en) | 1979-06-20 |
Family
ID=15383816
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14537777A Pending JPS5477478A (en) | 1977-11-30 | 1977-11-30 | Discharge lamp lighting apparatus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5477478A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55179032U (en) * | 1979-06-11 | 1980-12-23 |
-
1977
- 1977-11-30 JP JP14537777A patent/JPS5477478A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55179032U (en) * | 1979-06-11 | 1980-12-23 |
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