JPS6413593A - Fluorescent indicator tube driver - Google Patents
Fluorescent indicator tube driverInfo
- Publication number
- JPS6413593A JPS6413593A JP16866987A JP16866987A JPS6413593A JP S6413593 A JPS6413593 A JP S6413593A JP 16866987 A JP16866987 A JP 16866987A JP 16866987 A JP16866987 A JP 16866987A JP S6413593 A JPS6413593 A JP S6413593A
- Authority
- JP
- Japan
- Prior art keywords
- heater
- turns
- display tube
- fluorescent display
- voltage
- 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
Abstract
PURPOSE: To decrease the number of necessary power sources and simplify a circuit by switching the polarity of a heater voltage with the scan signal of a fluorescent display tube. CONSTITUTION: Transistors(TR) 5 and 7 for heater driving turn on and off alternately with the scan signal outputted by a logic part 3. When the TR 5 turns on, a TR 6 turns on through a resistance, and a current flows through the TR 6, a heater, and the TR 5, so that the heater turns on. When the TR 7 turns on, a current flows through a TR 4, the heater, and the TR 7. When the left half of the fluorescent display tube 1 is scanned, the heater voltage is applied so that the left end of the heater is a plus electrode and when the right half of the fluorescent display tube 1 is scanned, the heater voltage is so applied that the right end of the heater is a plus electrode. Consequently, the driving circuits are decreased and the circuit is simplified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16866987A JPS6413593A (en) | 1987-07-08 | 1987-07-08 | Fluorescent indicator tube driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16866987A JPS6413593A (en) | 1987-07-08 | 1987-07-08 | Fluorescent indicator tube driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6413593A true JPS6413593A (en) | 1989-01-18 |
Family
ID=15872298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16866987A Pending JPS6413593A (en) | 1987-07-08 | 1987-07-08 | Fluorescent indicator tube driver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6413593A (en) |
-
1987
- 1987-07-08 JP JP16866987A patent/JPS6413593A/en active Pending
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