JPS6457598A - Discharge lamp lighting device - Google Patents
Discharge lamp lighting deviceInfo
- Publication number
- JPS6457598A JPS6457598A JP21178587A JP21178587A JPS6457598A JP S6457598 A JPS6457598 A JP S6457598A JP 21178587 A JP21178587 A JP 21178587A JP 21178587 A JP21178587 A JP 21178587A JP S6457598 A JPS6457598 A JP S6457598A
- Authority
- JP
- Japan
- Prior art keywords
- emissionless
- circuit
- state
- discharge lamp
- tph
- 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
- Circuit Arrangements For Discharge Lamps (AREA)
- Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
Abstract
PURPOSE:To reliably inform a user of the necessity to replace a discharge lamp by displaying the emissionless state via the flickering of the discharge lamp when the discharge lamp becomes the emissionless state and displaying the emissionless state every time a dimmer switch is operated after the emissionless state display. CONSTITUTION:While a display lamp l1 is fully lit, if it approaches the life terminal stage and performs the half-wave discharge, a high-level emissionless state detection signal is outputted from an emissionless state detecting circuit 2, a counter circuit 3 is counted up once, and this signal passes an AND circuit A5 to reset a preheat timer circuit Tph. The preheating operation is thereby performed for a fixed time, then the start operation is performed again. When a dimmer switch Sd is turned on, the output of an AND circuit A8 is changed to a low level, a trigger signal is outputted from a trigger signal generating circuit 7 to set the counter circuit 3. The output signal of the counter circuit 3 becomes a low level. The emissionless state detection signal passes the AND circuit A5 again, the preheat timer circuit Tph is reset, the preheating operation and the restart operation are performed, and the emissionless state is displayed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62211785A JP2617482B2 (en) | 1987-08-26 | 1987-08-26 | Discharge lamp lighting device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62211785A JP2617482B2 (en) | 1987-08-26 | 1987-08-26 | Discharge lamp lighting device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6457598A true JPS6457598A (en) | 1989-03-03 |
JP2617482B2 JP2617482B2 (en) | 1997-06-04 |
Family
ID=16611564
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62211785A Expired - Lifetime JP2617482B2 (en) | 1987-08-26 | 1987-08-26 | Discharge lamp lighting device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2617482B2 (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 |
JPH10503047A (en) * | 1994-07-19 | 1998-03-17 | シーメンス アクチエンゲゼルシヤフト | Method of operating at least one fluorescent lamp with electronic ballast and ballast arrangement for the fluorescent lamp |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61190898A (en) * | 1985-02-18 | 1986-08-25 | 三菱電機株式会社 | Discharge lamp lighting device |
-
1987
- 1987-08-26 JP JP62211785A patent/JP2617482B2/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61190898A (en) * | 1985-02-18 | 1986-08-25 | 三菱電機株式会社 | Discharge lamp lighting device |
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 |
JPH10503047A (en) * | 1994-07-19 | 1998-03-17 | シーメンス アクチエンゲゼルシヤフト | Method of operating at least one fluorescent lamp with electronic ballast and ballast arrangement for the fluorescent lamp |
Also Published As
Publication number | Publication date |
---|---|
JP2617482B2 (en) | 1997-06-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term | ||
FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080311 Year of fee payment: 11 |