JPS63198091U - - Google Patents
Info
- Publication number
- JPS63198091U JPS63198091U JP8808987U JP8808987U JPS63198091U JP S63198091 U JPS63198091 U JP S63198091U JP 8808987 U JP8808987 U JP 8808987U JP 8808987 U JP8808987 U JP 8808987U JP S63198091 U JPS63198091 U JP S63198091U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- switch
- inductor
- cathode
- power supply
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims description 4
- 239000003990 capacitor Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
Description
第１図は本考案によるカソード駆動回路の一実
施例を示す蛍光発光形表示装置の模式図、第２図
ａは同カソード駆動回路においてスイツチがオフ
状態のときの等価回路図、第２図ｂは同カソード
駆動回路においてスイツチがオン状態のときの等
価回路図、第３図は同カソード駆動回路によつて
制御されるカソードの両端電圧の波形図、第４図
は従来のカソード駆動回路の一例を示す蛍光発光
形表示装置の模式図である。
８……カソード、１０……直列回路、１１……
ダイオード、１２……並列回路、１３……検出回
路、１４……制御回路、１５……直流電源、１６
……スイツチ、１７……インダクタ、１８……キ
ヤパシタ。
Fig. 1 is a schematic diagram of a fluorescent display device showing an embodiment of the cathode drive circuit according to the present invention, Fig. 2a is an equivalent circuit diagram of the same cathode drive circuit when the switch is in the OFF state, and Fig. 2b is an equivalent circuit diagram when the switch is in the on state in the cathode drive circuit, Figure 3 is a waveform diagram of the voltage across the cathode controlled by the cathode drive circuit, and Figure 4 is an example of a conventional cathode drive circuit. FIG. 2 is a schematic diagram of a fluorescent display device. 8...Cathode, 10...Series circuit, 11...
Diode, 12...Parallel circuit, 13...Detection circuit, 14...Control circuit, 15...DC power supply, 16
...Switch, 17...Inductor, 18...Capacitor.
Claims (1)
直列回路と、前記インダクタとスイツチとの接続
点との間に設けられたダイオードと、前記直流電
源とインダクタとの接続点と前記ダイオードとの
間に設けられたカソードとキヤパシタを有する並
列回路と、前記カソードの両端電圧を検出して対
応する検出信号を出力する検出回路と、前記検出
信号に基づいて前記スイツチをオン、オフ制御す
る制御回路とを備えたことを特徴とするカソード
駆動回路。 A series circuit including a DC power supply, an inductor, and a switch, a diode provided between a connection point between the inductor and the switch, and a cathode provided between the connection point between the DC power supply and the inductor and the diode. and a parallel circuit having a capacitor; a detection circuit that detects the voltage across the cathode and outputs a corresponding detection signal; and a control circuit that controls the switch on and off based on the detection signal. Characteristic cathode drive circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987088089U JPH0755585Y2 (en) | 1987-06-09 | 1987-06-09 | Fluorescent display tube drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987088089U JPH0755585Y2 (en) | 1987-06-09 | 1987-06-09 | Fluorescent display tube drive circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63198091U true JPS63198091U (en) | 1988-12-20 |
| JPH0755585Y2 JPH0755585Y2 (en) | 1995-12-20 |
Family
ID=30945889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987088089U Expired - Lifetime JPH0755585Y2 (en) | 1987-06-09 | 1987-06-09 | Fluorescent display tube drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0755585Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52100846A (en) * | 1976-02-20 | 1977-08-24 | Futaba Denshi Kogyo Kk | Circuit for driving multiidigit fluorescent display tube |
| JPS61293159A (en) * | 1985-06-18 | 1986-12-23 | Fuji Electric Co Ltd | Dc voltage control circuit |
-
1987
- 1987-06-09 JP JP1987088089U patent/JPH0755585Y2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52100846A (en) * | 1976-02-20 | 1977-08-24 | Futaba Denshi Kogyo Kk | Circuit for driving multiidigit fluorescent display tube |
| JPS61293159A (en) * | 1985-06-18 | 1986-12-23 | Fuji Electric Co Ltd | Dc voltage control circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0755585Y2 (en) | 1995-12-20 |