JPH0333485U - - Google Patents
Info
- Publication number
- JPH0333485U JPH0333485U JP9426289U JP9426289U JPH0333485U JP H0333485 U JPH0333485 U JP H0333485U JP 9426289 U JP9426289 U JP 9426289U JP 9426289 U JP9426289 U JP 9426289U JP H0333485 U JPH0333485 U JP H0333485U
- Authority
- JP
- Japan
- Prior art keywords
- pulse signal
- pulse
- display tube
- fluorescent display
- predetermined
- 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
- 238000005286 illumination Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Description
第１図は本考案の蛍光表示管の調光装置の実施
例を示す構成図、第２図及び第３図は本実施例装
置の動作を示す信号波形図、第４図は従来の調光
装置を示す構成図である。
４……クロツクジエネレータ、５……スイツチ
駆動回路、６……スイツチング素子、７……蛍光
表示管、８……周波数変換器、９……一定幅パル
ス発生回路。
Fig. 1 is a configuration diagram showing an embodiment of the dimming device for a fluorescent display tube of the present invention, Figs. 2 and 3 are signal waveform diagrams showing the operation of the device of this embodiment, and Fig. 4 is a conventional dimming device. FIG. 2 is a configuration diagram showing the device. 4... Clock generator, 5... Switch drive circuit, 6... Switching element, 7... Fluorescent display tube, 8... Frequency converter, 9... Constant width pulse generation circuit.
Claims (1)
ルス幅が所定倍でデユーテイー比が一定のパルス
信号に変換し、このパルス信号の立上り又は立下
りに同期して所定幅のパルス信号を発生させ、こ
のパルス信号で蛍光表示管を点灯させることを特
徴とする蛍光表示管の調光装置。 An illumination control pulse with a constant period is converted into a pulse signal with a predetermined pulse width and a constant duty ratio, and a pulse signal with a predetermined width is generated in synchronization with the rise or fall of this pulse signal. A dimmer for a fluorescent display tube, characterized in that it lights up the fluorescent display tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9426289U JPH0333485U (en) | 1989-08-10 | 1989-08-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9426289U JPH0333485U (en) | 1989-08-10 | 1989-08-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0333485U true JPH0333485U (en) | 1991-04-02 |
Family
ID=31643603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9426289U Pending JPH0333485U (en) | 1989-08-10 | 1989-08-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0333485U (en) |
-
1989
- 1989-08-10 JP JP9426289U patent/JPH0333485U/ja active Pending