JPS6433192U - - Google Patents
Info
- Publication number
- JPS6433192U JPS6433192U JP12875987U JP12875987U JPS6433192U JP S6433192 U JPS6433192 U JP S6433192U JP 12875987 U JP12875987 U JP 12875987U JP 12875987 U JP12875987 U JP 12875987U JP S6433192 U JPS6433192 U JP S6433192U
- Authority
- JP
- Japan
- Prior art keywords
- lamp
- current
- lamp lighting
- circuit
- fluorescent lamp
- 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 3
- 238000010586 diagram Methods 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 1
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Description
第１図は本考案点灯装置の基本回路ブロツク図
、第２図は本考案点灯装置の具体的回路例を示す
点灯回路図、第３図は第２図回路におけるランプ
点灯正常時と不正常時でのランプ電流波形図であ
る。第４図は従来の蛍光ランプ点灯装置の回路ブ
ロツク図である。
９…電源、１１…ランプ点灯回路、１２…蛍光
ランプ、１３…電流検出手段、１４…スイツチン
グ回路。
Figure 1 is a basic circuit block diagram of the lighting device of the present invention, Figure 2 is a lighting circuit diagram showing a specific circuit example of the lighting device of the present invention, and Figure 3 is the circuit shown in Figure 2 during normal and abnormal lamp lighting. It is a lamp current waveform diagram at . FIG. 4 is a circuit block diagram of a conventional fluorescent lamp lighting device. 9... Power supply, 11... Lamp lighting circuit, 12... Fluorescent lamp, 13... Current detection means, 14... Switching circuit.
Claims (1)
ランプ点灯回路に、蛍光ランプの電極に流れる電
流を検出する電流検出手段、及びこの電流検出手
段で検出した電流が通常のランプ点灯時の電流を
越える所定値以上で、所定時間以上流れると駆動
して、前記ランプ点灯回路のランプ点灯動作を次
の電源投入時まで停止させるスイツチング回路を
有する点灯装置保護回路を組み込んだことを特徴
とする蛍光ランプ点灯装置。 A lamp lighting circuit that lights a hot cathode fluorescent lamp when the power is turned on includes a current detection means for detecting the current flowing through the electrodes of the fluorescent lamp, and a current detected by this current detection means that exceeds the current when the lamp is lit normally. A fluorescent lamp lighting device incorporating a lighting device protection circuit having a switching circuit that is activated when the voltage exceeds a predetermined value and flows for a predetermined time period to stop the lamp lighting operation of the lamp lighting circuit until the next power is turned on. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12875987U JPH0539599Y2 (en) | 1987-08-24 | 1987-08-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12875987U JPH0539599Y2 (en) | 1987-08-24 | 1987-08-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6433192U true JPS6433192U (en) | 1989-03-01 |
| JPH0539599Y2 JPH0539599Y2 (en) | 1993-10-07 |
Family
ID=31382397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12875987U Expired - Lifetime JPH0539599Y2 (en) | 1987-08-24 | 1987-08-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0539599Y2 (en) |
-
1987
- 1987-08-24 JP JP12875987U patent/JPH0539599Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0539599Y2 (en) | 1993-10-07 |
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