JPH0423098U - - Google Patents
Info
- Publication number
- JPH0423098U JPH0423098U JP6307290U JP6307290U JPH0423098U JP H0423098 U JPH0423098 U JP H0423098U JP 6307290 U JP6307290 U JP 6307290U JP 6307290 U JP6307290 U JP 6307290U JP H0423098 U JPH0423098 U JP H0423098U
- Authority
- JP
- Japan
- Prior art keywords
- discharge lamp
- lighting device
- output
- preheating current
- filaments
- 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
- 230000002159 abnormal effect Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 7
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Description
第１図は本考案の第１の実施例を示す回路構成
図、第２図は同上の動作説明図、第３図は本考案
の第２の実施例を示す回路構成図、第４図は同上
の動作説明図、第５図は本考案の第３の実施例を
示す回路構成図、第６図は本考案の第４の実施例
を示す回路構成図、第７図は同上の動作説明図、
第８図は本考案の従来例を示す回路構成図である
。
２……点灯装置、６……放電灯、７，８……フ
イラメント、１３，Ｅ１，ＰＣ１，ＰＣ２，１４
……予熱電流判別手段、ＣＴ１，ＣＴ２，ＣＴ３
，ＰＣ１，ＰＣ２……予熱電流検出手段。
Fig. 1 is a circuit configuration diagram showing a first embodiment of the present invention, Fig. 2 is an explanatory diagram of the same operation as above, Fig. 3 is a circuit diagram showing a second embodiment of the invention, and Fig. 4 is a circuit diagram showing a second embodiment of the invention. 5 is a circuit configuration diagram showing the third embodiment of the present invention, FIG. 6 is a circuit diagram showing the fourth embodiment of the present invention, and FIG. 7 is an explanation of the operation of the same as above. figure,
FIG. 8 is a circuit diagram showing a conventional example of the present invention. 2...Lighting device, 6...Discharge lamp, 7, 8...Filament, 13, E1, PC1, PC2, 14
...Preheating current discrimination means, CT1, CT2, CT3
, PC1, PC2... Preheating current detection means.
Claims (1)
電灯を点灯させる点灯装置と、前記複数のフイラ
メントのそれぞれのフイラメントに流れる電流を
検出できる予熱電流検出手段と、このそれぞれの
予熱電流検出手段の出力を合成しこの合成出力が
所定レベル以下となつたときに放電灯を異常状態
と判別する予熱電流判別手段とを備え、異常状態
と判別された場合には点灯装置の出力を制限した
ことを特徴とする放電灯点灯装置。 A discharge lamp having a plurality of filaments, a lighting device for lighting the discharge lamp, a preheating current detection means capable of detecting a current flowing through each of the plurality of filaments, and an output of each of the preheating current detection means is synthesized. The present invention is characterized by comprising a preheating current determining means for determining that the discharge lamp is in an abnormal state when the combined output of the lamp falls below a predetermined level, and in the case where the discharge lamp is determined to be in an abnormal state, the output of the lighting device is limited. Discharge lamp lighting device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6307290U JPH0423098U (en) | 1990-06-14 | 1990-06-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6307290U JPH0423098U (en) | 1990-06-14 | 1990-06-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0423098U true JPH0423098U (en) | 1992-02-25 |
Family
ID=31592800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6307290U Pending JPH0423098U (en) | 1990-06-14 | 1990-06-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0423098U (en) |
-
1990
- 1990-06-14 JP JP6307290U patent/JPH0423098U/ja active Pending
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