JPS5493875A - Discharge lamp lighting apparatus - Google Patents
Discharge lamp lighting apparatusInfo
- Publication number
- JPS5493875A JPS5493875A JP16018477A JP16018477A JPS5493875A JP S5493875 A JPS5493875 A JP S5493875A JP 16018477 A JP16018477 A JP 16018477A JP 16018477 A JP16018477 A JP 16018477A JP S5493875 A JPS5493875 A JP S5493875A
- Authority
- JP
- Japan
- Prior art keywords
- capacitor
- inductance
- lamp
- discharge lamp
- switching element
- 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.)
- Granted
Links
Landscapes
- Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
Abstract
PURPOSE:To provide a discharge lamp lighting apparatus, in which a switching element connected in series with a capacitor or an inductance is connected to series circuit of inductance, capacitor and discharge lamp at the center between the inductance and the capacitor, whereby it is enabled to control the brightness of the lamp at a required level. CONSTITUTION:A discharge lamp 6 is in parallel with a series circuit of capacitor 3 and switching element 4, via capacitor 10, and a current limiting element 5 is constituted by the capacitor 10 and an inductance element 2. At the time when the discharge lamp is fully lighted, switching element 4 is on-off controlled once at each half cycle at a poper phase angle, and the lamp is fully lighted by the resonance voltage developed in the circuit constituted by the inductance and capacitor. On the other hand, at the time when the brightness of the lamp is controlled, a control signal is continuously fed from control circuit 9, and switching element 4 is kept in its ON-condition. Thus, the lamp is lighted only by the energy supplied from AC power source 1 and kept in its brightness-controlled condition.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16018477A JPS6054760B2 (en) | 1977-12-30 | 1977-12-30 | discharge lamp lighting device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16018477A JPS6054760B2 (en) | 1977-12-30 | 1977-12-30 | discharge lamp lighting device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5493875A true JPS5493875A (en) | 1979-07-25 |
JPS6054760B2 JPS6054760B2 (en) | 1985-12-02 |
Family
ID=15709633
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16018477A Expired JPS6054760B2 (en) | 1977-12-30 | 1977-12-30 | discharge lamp lighting device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6054760B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62188541U (en) * | 1986-04-25 | 1987-12-01 | ||
JPH0437243Y2 (en) * | 1986-05-23 | 1992-09-02 |
-
1977
- 1977-12-30 JP JP16018477A patent/JPS6054760B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS6054760B2 (en) | 1985-12-02 |
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