JP4399745B2 - 放電灯点灯装置 - Google Patents
放電灯点灯装置 Download PDFInfo
- Publication number
- JP4399745B2 JP4399745B2 JP2006140809A JP2006140809A JP4399745B2 JP 4399745 B2 JP4399745 B2 JP 4399745B2 JP 2006140809 A JP2006140809 A JP 2006140809A JP 2006140809 A JP2006140809 A JP 2006140809A JP 4399745 B2 JP4399745 B2 JP 4399745B2
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- Japan
- Prior art keywords
- circuit
- voltage
- lamp
- capacitor
- output
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- 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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- Circuit Arrangements For Discharge Lamps (AREA)
Description
Claims (1)
- 直流電源と;
直流電源に一対の電界効果トランジスタの直列回路を並列に接続してなり、比較的高い周波数で動作する予熱状態、前記予熱状態後に比較的低い周波数で動作する始動状態、前記始動状態後に前記始動状態よりは低い高周波電圧となる点灯状態を形成する高周波インバータ回路と;
一端を前記一対の電界効果トランジスタの接続点に接続し、他端を前記直流電源の負極側に接続してなるコンデンサ、チョークコイル及び放電灯を含む直列回路と;
放電ランプに対して並列に接続された複数の抵抗が直列に接続された直列分圧回路と、この直列分圧回路に対して並列に接続されたコンデンサとを有し、放電灯の両端に発生する所定レベル以上の直流電圧成分を検出する直流電圧検出回路と;
直流電圧検出回路の出力が高周波インバータの始動状態後であって、放電灯の放電点灯開始後に基準電圧以上になるか否かを判定する判定回路と;
判定回路の出力に基づいて前記高周波インバータ回路の発振を停止又は前記高周波インバータ回路の出力を弱めるように制御するインバータ回路制御手段と;
を具備することを特徴とする放電灯点灯装置。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006140809A JP4399745B2 (ja) | 2006-05-19 | 2006-05-19 | 放電灯点灯装置 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006140809A JP4399745B2 (ja) | 2006-05-19 | 2006-05-19 | 放電灯点灯装置 |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7212296A Division JP3823364B2 (ja) | 1996-03-27 | 1996-03-27 | 放電灯点灯装置 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007289653A Division JP4853729B2 (ja) | 2007-11-07 | 2007-11-07 | 放電灯点灯装置 |
JP2009099958A Division JP2009158498A (ja) | 2009-04-16 | 2009-04-16 | 放電灯点灯装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2006228755A JP2006228755A (ja) | 2006-08-31 |
JP4399745B2 true JP4399745B2 (ja) | 2010-01-20 |
Family
ID=36989892
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2006140809A Expired - Lifetime JP4399745B2 (ja) | 2006-05-19 | 2006-05-19 | 放電灯点灯装置 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP4399745B2 (ja) |
-
2006
- 2006-05-19 JP JP2006140809A patent/JP4399745B2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
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JP2006228755A (ja) | 2006-08-31 |
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