JPH01130297U - - Google Patents
Info
- Publication number
- JPH01130297U JPH01130297U JP2705588U JP2705588U JPH01130297U JP H01130297 U JPH01130297 U JP H01130297U JP 2705588 U JP2705588 U JP 2705588U JP 2705588 U JP2705588 U JP 2705588U JP H01130297 U JPH01130297 U JP H01130297U
- Authority
- JP
- Japan
- Prior art keywords
- lamp
- circuit
- voltage
- semiconductor switch
- current
- 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
- 239000004065 semiconductor Substances 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 12
Description
第１図は本考案のランプ駆動回路のクレーム対
応図である。第２図〜第６図は本考案の一実施例
を説明するもので第２図はランプ駆動回路の構成
図、第３図ａ〜ｅは各部信号のタイムチヤート、
第４図は定電流制御回路の回路構成図、第５図は
判定回路の構成図、第６図は昇圧回路の回路構成
図である。第７図〜第１２図は従来例を説明する
もので、第７図はランプ駆動回路の概略図、第８
図はそのランプ電流の特性図、第９図は他の従来
例のランプ駆動回路の概略図、第１０図はそのラ
ンプ電流の特性図、第１１図は更に他の従来例の
ランプ駆動回路のブロツク図、第１２図はそのラ
ンプ電流の特性図である。
１０：ランプ、１１：半導体スイツチ、１２：
主電流モニタ回路、１３：定電流制御回路、１４
：判定回路、１５：昇圧回路、１６：アナログス
イツチ、１８：入力制御回路。
FIG. 1 is a diagram corresponding to the claims of the lamp drive circuit of the present invention. FIGS. 2 to 6 illustrate an embodiment of the present invention. FIG. 2 is a configuration diagram of a lamp drive circuit, and FIGS. 3 a to 3 e are time charts of various signals.
FIG. 4 is a circuit diagram of the constant current control circuit, FIG. 5 is a diagram of the determination circuit, and FIG. 6 is a circuit diagram of the booster circuit. 7 to 12 explain a conventional example, and FIG. 7 is a schematic diagram of a lamp drive circuit, and FIG. 8 is a schematic diagram of a lamp drive circuit.
9 is a schematic diagram of another conventional lamp drive circuit, FIG. 10 is a characteristic diagram of the lamp current, and FIG. 11 is a diagram of another conventional lamp drive circuit. The block diagram, FIG. 12, is a characteristic diagram of the lamp current. 10: Lamp, 11: Semiconductor switch, 12:
Main current monitor circuit, 13: Constant current control circuit, 14
: Judgment circuit, 15: Boost circuit, 16: Analog switch, 18: Input control circuit.
Claims (1)
半導体スイツチと、 前記主電流をモニタするためのモニタ回路と、 主電流と比例して前記モニタ回路に発生する電
圧を入力とし前記ランプに流れる電流が予め設定
したランプ予熱電流になるように前記半導体スイ
ツチのゲート電圧を制御する定電流制御回路と、 予熱に伴い上昇する前記ランプの端子電圧が予
め設定した基準電圧を越えたかを比較判定する判
定回路と、 前記判定回路によりランプ端子電圧が基準電圧
を越えたことが判定されたときの出力信号により
起動され前記半導体スイツチのフルオン用ゲート
電圧を生成する昇圧回路とを備えてなることを特
徴とするランプ駆動回路。[Claims for Utility Model Registration] A semiconductor switch for main current control connected between a lamp and its power supply, a monitor circuit for monitoring the main current, and a voltage generated in the monitor circuit in proportion to the main current. a constant current control circuit that takes as input and controls the gate voltage of the semiconductor switch so that the current flowing through the lamp becomes a preset lamp preheating current, and a terminal voltage of the lamp that increases with preheating is a preset reference voltage. a step-up circuit that is activated by an output signal when the judgment circuit judges that the lamp terminal voltage exceeds the reference voltage and generates a gate voltage for full-on of the semiconductor switch; A lamp drive circuit comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988027055U JPH0713199Y2 (en) | 1988-02-29 | 1988-02-29 | Lamp drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988027055U JPH0713199Y2 (en) | 1988-02-29 | 1988-02-29 | Lamp drive circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01130297U true JPH01130297U (en) | 1989-09-05 |
| JPH0713199Y2 JPH0713199Y2 (en) | 1995-03-29 |
Family
ID=31249228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988027055U Expired - Lifetime JPH0713199Y2 (en) | 1988-02-29 | 1988-02-29 | Lamp drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0713199Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5727698U (en) * | 1980-07-24 | 1982-02-13 | ||
| JPS59189429U (en) * | 1983-05-31 | 1984-12-15 | ナイルス部品株式会社 | Inrush current prevention circuit |
-
1988
- 1988-02-29 JP JP1988027055U patent/JPH0713199Y2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5727698U (en) * | 1980-07-24 | 1982-02-13 | ||
| JPS59189429U (en) * | 1983-05-31 | 1984-12-15 | ナイルス部品株式会社 | Inrush current prevention circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0713199Y2 (en) | 1995-03-29 |
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