JPS6445093A - Dimmer - Google Patents
DimmerInfo
- Publication number
- JPS6445093A JPS6445093A JP19987887A JP19987887A JPS6445093A JP S6445093 A JPS6445093 A JP S6445093A JP 19987887 A JP19987887 A JP 19987887A JP 19987887 A JP19987887 A JP 19987887A JP S6445093 A JPS6445093 A JP S6445093A
- Authority
- JP
- Japan
- Prior art keywords
- dimming
- signal
- circuit
- capacitor
- transistor
- 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 make stable dimming by furnishing a charging circuit consisting of a resistance and a capacitor, comparing a charge/discharge signal therefrom with a setting signal as reference for dimming, produce a dimming signal, and giving input to the inverter with this dimming signal and an inverter oscillation signal put in synchronization. CONSTITUTION:Output sides of comparators 14, 15 are connected to reset/set terminal of D-type FF 17, and the Q output of this FF 17 and a dimming basic signal are together fed in an AND circuit 18. These FF 17 and AND circuit 18 constitute a driver circuit 19 to drive a transistor Q1 as a switching element for charging/discharging of a capacitor C1, and the base current for transistor Q1 is given by the AND circuit 18. The charge/discharge signal is given to a neg. input terminal of a third comparator 20, while the pos. input terminal thereof is fed with a dimming setting signal. A constant current power supply is formed from a mirror circuit consisting of resistances R6, R7, R8 and transistors Q2, Q3, and its voltage is changed by a variable resistor VR1 to yield a dimming setting signal, and a capacitor C2 is connected in parallel with this variable resistor VR1.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19987887A JPS6445093A (en) | 1987-08-12 | 1987-08-12 | Dimmer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19987887A JPS6445093A (en) | 1987-08-12 | 1987-08-12 | Dimmer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6445093A true JPS6445093A (en) | 1989-02-17 |
Family
ID=16415118
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19987887A Pending JPS6445093A (en) | 1987-08-12 | 1987-08-12 | Dimmer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6445093A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0315500U (en) * | 1989-06-27 | 1991-02-15 | ||
JPH05190291A (en) * | 1992-01-10 | 1993-07-30 | Toshiba Electric Appliance Co Ltd | Discharge lamp lighting device |
CN102530217A (en) * | 2011-12-19 | 2012-07-04 | 四川大学 | Fast and efficient water spray propelling technology |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS529988A (en) * | 1975-07-11 | 1977-01-25 | Canon Inc | Lamp controlling device |
-
1987
- 1987-08-12 JP JP19987887A patent/JPS6445093A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS529988A (en) * | 1975-07-11 | 1977-01-25 | Canon Inc | Lamp controlling device |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0315500U (en) * | 1989-06-27 | 1991-02-15 | ||
JPH05190291A (en) * | 1992-01-10 | 1993-07-30 | Toshiba Electric Appliance Co Ltd | Discharge lamp lighting device |
CN102530217A (en) * | 2011-12-19 | 2012-07-04 | 四川大学 | Fast and efficient water spray propelling technology |
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