JP4125694B2 - 放電ランプ点灯装置 - Google Patents
放電ランプ点灯装置 Download PDFInfo
- Publication number
- JP4125694B2 JP4125694B2 JP2004133312A JP2004133312A JP4125694B2 JP 4125694 B2 JP4125694 B2 JP 4125694B2 JP 2004133312 A JP2004133312 A JP 2004133312A JP 2004133312 A JP2004133312 A JP 2004133312A JP 4125694 B2 JP4125694 B2 JP 4125694B2
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- Prior art keywords
- discharge lamp
- circuit
- lighting
- resonance
- 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.)
- Expired - Lifetime
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Description
2 インバータ回路
3 共振回路
4,31 コンデンサ
5 放電ランプ
6 駆動回路
12 ヒューズ素子
21,22 トランジスタ
32 インダクタンス素子
Claims (1)
- ヒューズ素子を有する直流電源と、前記直流電源の一端にヒューズ素子を介して並列に接続され、スイッチ素子を有するとともに前記スイッチ素子をオン・オフ駆動する駆動回路を設けたインバータ回路と、前記インバータ回路の出力端に接続されたコンデンサおよびインダクタンス素子からなる共振回路と、前記共振回路の出力端に接続された放電ランプと、前記放電ランプに並列に接続されたコンデンサとを備えた放電ランプ点灯装置において、
前記放電ランプの始動時及び異常点灯時に前記共振回路の共振電流が飽和電流波形となるように前記インダクタンス素子の飽和電流を通常点灯での電流のピーク値の2倍以上3倍以下に設定し、前記スイッチ素子は、前記共振回路から飽和電流波形の共振電流が少なくとも前記放電ランプが始動して定常点灯に移行するまでの時間は破壊されることなく、前記飽和電流波形の共振電流が前記時間を越えて継続して出力された場合に、発熱して短絡状態で破壊される特性を有するものとし、前記放電ランプの不良点灯状態が長く続いた場合に、前記スイッチ素子を短絡させて前記ヒューズ素子を溶断させることを特徴とする放電ランプ点灯装置。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004133312A JP4125694B2 (ja) | 2004-04-28 | 2004-04-28 | 放電ランプ点灯装置 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004133312A JP4125694B2 (ja) | 2004-04-28 | 2004-04-28 | 放電ランプ点灯装置 |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4541895A Division JP3571098B2 (ja) | 1995-03-06 | 1995-03-06 | 放電ランプ点灯装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2004221093A JP2004221093A (ja) | 2004-08-05 |
JP4125694B2 true JP4125694B2 (ja) | 2008-07-30 |
Family
ID=32906398
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004133312A Expired - Lifetime JP4125694B2 (ja) | 2004-04-28 | 2004-04-28 | 放電ランプ点灯装置 |
Country Status (1)
Country | Link |
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JP (1) | JP4125694B2 (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7839094B2 (en) * | 2008-05-02 | 2010-11-23 | General Electric Company | Voltage fed programmed start ballast |
CN107333363B (zh) * | 2017-08-28 | 2019-05-31 | 北京小米移动软件有限公司 | 降低电磁干扰的系统及灯具 |
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2004
- 2004-04-28 JP JP2004133312A patent/JP4125694B2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
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JP2004221093A (ja) | 2004-08-05 |
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