JPH0197395U - - Google Patents
Info
- Publication number
- JPH0197395U JPH0197395U JP19129087U JP19129087U JPH0197395U JP H0197395 U JPH0197395 U JP H0197395U JP 19129087 U JP19129087 U JP 19129087U JP 19129087 U JP19129087 U JP 19129087U JP H0197395 U JPH0197395 U JP H0197395U
- Authority
- JP
- Japan
- Prior art keywords
- fluorescent display
- turning
- display tube
- filament
- circuit
- 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
- 238000010586 diagram Methods 0.000 description 2
Description
第１図はこの考案に係る蛍光表示管の点消灯回
路の実施例を示す回路図、第２図は従来の実施例
を示す回路図である。
主要部分の符号の説明、１：蛍光表示管、２：
トランス、３：ツエナーダイオード、４，５：ト
ランジスタ、７：ダイオード、８：端子、９：フ
オトカプラ、９ａ：フオトトライアツク、９ｂ：
フオトダイオード。
FIG. 1 is a circuit diagram showing an embodiment of a lighting/extinguishing circuit for a fluorescent display tube according to this invention, and FIG. 2 is a circuit diagram showing a conventional embodiment. Explanation of symbols of main parts, 1: Fluorescent display tube, 2:
Transformer, 3: Zener diode, 4, 5: Transistor, 7: Diode, 8: Terminal, 9: Photocoupler, 9a: Phototriack, 9b:
Photodiode.
Claims (1)
するために設けたフオトトライアツクと、前記蛍
光表示管のフイラメント電圧の直流分をオン・オ
フするために設けたトランジスタとで構成したこ
とを特徴とする蛍光表示管の点消灯回路。 It is characterized by comprising a phototriax provided for turning on and off a power supply for the filament of the fluorescent display tube, and a transistor provided for turning on and off the DC component of the filament voltage of the fluorescent display tube. On/off circuit for fluorescent display tubes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19129087U JPH0197395U (en) | 1987-12-18 | 1987-12-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19129087U JPH0197395U (en) | 1987-12-18 | 1987-12-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0197395U true JPH0197395U (en) | 1989-06-28 |
Family
ID=31482209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19129087U Pending JPH0197395U (en) | 1987-12-18 | 1987-12-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0197395U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5327735B2 (en) * | 1972-11-14 | 1978-08-10 | ||
| JPS60142731A (en) * | 1983-12-29 | 1985-07-27 | Matsushita Electric Ind Co Ltd | Fluorescent character display tube control circuit |
-
1987
- 1987-12-18 JP JP19129087U patent/JPH0197395U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5327735B2 (en) * | 1972-11-14 | 1978-08-10 | ||
| JPS60142731A (en) * | 1983-12-29 | 1985-07-27 | Matsushita Electric Ind Co Ltd | Fluorescent character display tube control circuit |
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