JPS6489298A - Discharge lamp lighting device - Google Patents
Discharge lamp lighting deviceInfo
- Publication number
- JPS6489298A JPS6489298A JP24686287A JP24686287A JPS6489298A JP S6489298 A JPS6489298 A JP S6489298A JP 24686287 A JP24686287 A JP 24686287A JP 24686287 A JP24686287 A JP 24686287A JP S6489298 A JPS6489298 A JP S6489298A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- rectification
- circuit
- input
- over
- 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
- Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
Abstract
PURPOSE:To dispense with a large switching element and realize stepped light adjustment with simple constitution by providing a changing-over circuit which changes over a rectification method between full wave rectification and double voltage rectification in a rectification smoothing circuit and changing over the output of a lighting circuit by this rectification method. CONSTITUTION:The AC input of a power source A is rectified at a diode bridge in a rectification smoothing circuit F and smoothed at condensers C1, C2 and input into a lighting circuit B. Then, if a change-over circuit S is closed, the AC input of the power source A is rectified into double voltage, and voltage 2E double the power source voltage E is input into the lighting circuit B, and the output voltage of the lighting circuit B becomes full lighting voltage and a lamp La lights fully. On the otherhand, if the change-over circuit S is opened, the AC input of the power source A changes from double voltage rectification over to full wave rectification and the voltage E of the power source A becomes the input voltage of the lighting circuit B and the lamp La is changed over to lighting at step-adjusted light. Hereby, a switching element having large capacity becomes needless and step light adjustment becomes possible with simple constitution.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24686287A JPS6489298A (en) | 1987-09-30 | 1987-09-30 | Discharge lamp lighting device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24686287A JPS6489298A (en) | 1987-09-30 | 1987-09-30 | Discharge lamp lighting device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6489298A true JPS6489298A (en) | 1989-04-03 |
Family
ID=17154835
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP24686287A Pending JPS6489298A (en) | 1987-09-30 | 1987-09-30 | Discharge lamp lighting device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6489298A (en) |
-
1987
- 1987-09-30 JP JP24686287A patent/JPS6489298A/en active Pending
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