JPS6454698A - Lighting device for discharge lamp - Google Patents
Lighting device for discharge lampInfo
- Publication number
- JPS6454698A JPS6454698A JP21178287A JP21178287A JPS6454698A JP S6454698 A JPS6454698 A JP S6454698A JP 21178287 A JP21178287 A JP 21178287A JP 21178287 A JP21178287 A JP 21178287A JP S6454698 A JPS6454698 A JP S6454698A
- Authority
- JP
- Japan
- Prior art keywords
- condition
- preheating
- discharge lamp
- lighting
- discharge
- 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)
- Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
Abstract
PURPOSE:To alleviate a load on a high frequency generator circuit and to secure a bright, safe condition at the time of replacing a discharge lamp by indicating an emissionless condition of one lamp during controlled lighting followed by the control of the high frequency generator circuit for maintaining lighting of each discharge lamp. CONSTITUTION:When one of discharge lamps l1, l2 deteriorates and becomes in a half-wave discharge condition during controlled lighting, a detection signal from an emissionless condition detection circuit 2 is counted with a counter 3 and a preheating timer circuit Tph is simultaneously reset. When preheating action and starting action are then performed and each discharge lamp is lit again, the preheating and starting actions are repeated. When the counted number reaches a specified value, only an output of an all light lighting oscillation circuit OSC2 for two lights is transmitted and thereafter the discharge lamps l1, l2 returns to an all light lighting condition after a preheating action.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21178287A JPS6454698A (en) | 1987-08-26 | 1987-08-26 | Lighting device for discharge lamp |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21178287A JPS6454698A (en) | 1987-08-26 | 1987-08-26 | Lighting device for discharge lamp |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6454698A true JPS6454698A (en) | 1989-03-02 |
Family
ID=16611510
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21178287A Pending JPS6454698A (en) | 1987-08-26 | 1987-08-26 | Lighting device for discharge lamp |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6454698A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01231295A (en) * | 1988-03-09 | 1989-09-14 | Toshiba Electric Equip Corp | Discharge lamp lighting device |
JP2009218103A (en) * | 2008-03-11 | 2009-09-24 | Maruzen Electric Co Ltd | Luminaire |
-
1987
- 1987-08-26 JP JP21178287A patent/JPS6454698A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01231295A (en) * | 1988-03-09 | 1989-09-14 | Toshiba Electric Equip Corp | Discharge lamp lighting device |
JP2009218103A (en) * | 2008-03-11 | 2009-09-24 | Maruzen Electric Co Ltd | Luminaire |
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