JPS6482494A - Lighting device with dimming function - Google Patents
Lighting device with dimming functionInfo
- Publication number
- JPS6482494A JPS6482494A JP23938587A JP23938587A JPS6482494A JP S6482494 A JPS6482494 A JP S6482494A JP 23938587 A JP23938587 A JP 23938587A JP 23938587 A JP23938587 A JP 23938587A JP S6482494 A JPS6482494 A JP S6482494A
- Authority
- JP
- Japan
- Prior art keywords
- output voltage
- switching regulator
- signal
- flicker
- comparator
- 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 allow the stable dimming down to the low-brightness region by comparing the brightness signal with the warning reference value set to the value before the occurrence of the flicker of a fluorescent lamp and adjusting the output voltage of a switching regulator. CONSTITUTION:A comparator 6 compares the brightness signal Vs with the warning reference value Vr set to the value before the occurrence of the flicker of a fluorescent lamp 2, the signal to adjust the output voltage for the feedback signal of a switching regulator 4 is generated by an output voltage regulating circuit 7 provided between a switching regulator 4 and an inverter 6 based on the output of this comparator 6, thus the final adjusting output voltage from the switching regulator 4 is obtained. The dimming range can be thereby expanded without reducing the efficiency of the inverter or increasing the noise.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23938587A JPS6482494A (en) | 1987-09-24 | 1987-09-24 | Lighting device with dimming function |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23938587A JPS6482494A (en) | 1987-09-24 | 1987-09-24 | Lighting device with dimming function |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6482494A true JPS6482494A (en) | 1989-03-28 |
Family
ID=17043997
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP23938587A Pending JPS6482494A (en) | 1987-09-24 | 1987-09-24 | Lighting device with dimming function |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6482494A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0492399U (en) * | 1990-12-28 | 1992-08-11 |
-
1987
- 1987-09-24 JP JP23938587A patent/JPS6482494A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0492399U (en) * | 1990-12-28 | 1992-08-11 |
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