JPS62150898U - - Google Patents
Info
- Publication number
- JPS62150898U JPS62150898U JP3852386U JP3852386U JPS62150898U JP S62150898 U JPS62150898 U JP S62150898U JP 3852386 U JP3852386 U JP 3852386U JP 3852386 U JP3852386 U JP 3852386U JP S62150898 U JPS62150898 U JP S62150898U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- discharge lamp
- circuit
- lamp lighting
- lighting device
- 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
- 238000001514 detection method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 1
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Description
第１図は本考案の一実施例を示す回路図、第２
図は時間に対する放電灯の両端電圧の経時変化を
示す図、第３図は一方の電極がエミツタレス状態
の電圧波形図である。
１……直流源、２……スイツチング素子、３…
…発振トランス、４……限流素子、５……放電灯
、１１……電圧検出回路、１２……整流回路、１
３……比較回路、１４，１５……スイツチ。
Figure 1 is a circuit diagram showing one embodiment of the present invention;
The figure is a diagram showing the change over time in the voltage across the discharge lamp over time, and FIG. 3 is a voltage waveform diagram when one electrode is in an emitterless state. 1... DC source, 2... Switching element, 3...
...Oscillation transformer, 4... Current limiting element, 5... Discharge lamp, 11... Voltage detection circuit, 12... Rectifier circuit, 1
3... Comparison circuit, 14, 15... Switch.
Claims (1)
、放電灯の両端電圧を検出する電圧検出回路と、
該電圧検出回路の電圧を整流する整流回路と、基
準電圧を発生する基準電源と、該基準電源からの
基準電圧と前記整流回路からの出力電圧とを比較
する比較回路と、該比較回路からの出力電圧が前
記基準電圧以上になつたとき放電灯点灯装置の動
作を停止させるスイツチと放電灯点灯停止状態を
保持するための回路とを備えたことを特徴とする
放電灯点灯装置の保護回路。 In a discharge lamp lighting device lit by a DC source, a voltage detection circuit detects a voltage across the discharge lamp;
a rectifier circuit that rectifies the voltage of the voltage detection circuit; a reference power source that generates a reference voltage; a comparison circuit that compares the reference voltage from the reference power source with the output voltage from the rectifier circuit; A protection circuit for a discharge lamp lighting device, comprising: a switch that stops the operation of the discharge lamp lighting device when the output voltage exceeds the reference voltage; and a circuit that maintains the discharge lamp lighting stop state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3852386U JPS62150898U (en) | 1986-03-17 | 1986-03-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3852386U JPS62150898U (en) | 1986-03-17 | 1986-03-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62150898U true JPS62150898U (en) | 1987-09-24 |
Family
ID=30850852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3852386U Pending JPS62150898U (en) | 1986-03-17 | 1986-03-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62150898U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60208097A (en) * | 1984-03-31 | 1985-10-19 | 東芝ライテック株式会社 | Device for firing discharge lamp |
-
1986
- 1986-03-17 JP JP3852386U patent/JPS62150898U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60208097A (en) * | 1984-03-31 | 1985-10-19 | 東芝ライテック株式会社 | Device for firing discharge lamp |