JP2005063823A - 放電灯点灯回路 - Google Patents
放電灯点灯回路 Download PDFInfo
- Publication number
- JP2005063823A JP2005063823A JP2003292717A JP2003292717A JP2005063823A JP 2005063823 A JP2005063823 A JP 2005063823A JP 2003292717 A JP2003292717 A JP 2003292717A JP 2003292717 A JP2003292717 A JP 2003292717A JP 2005063823 A JP2005063823 A JP 2005063823A
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- JP
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- Prior art keywords
- discharge lamp
- voltage
- circuit
- detection
- conversion
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/288—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices and specially adapted for lamps without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
- H05B41/2881—Load circuits; Control thereof
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/288—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices and specially adapted for lamps without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
- H05B41/2881—Load circuits; Control thereof
- H05B41/2882—Load circuits; Control thereof the control resulting from an action on the static converter
- H05B41/2883—Load circuits; Control thereof the control resulting from an action on the static converter the controlled element being a DC/AC converter in the final stage, e.g. by harmonic mode starting
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
【解決手段】 放電灯点灯回路1は、直流入力を受けて交流変換を行う直流−交流変換回路3と、放電灯10にかかる電圧や電流について検出する検出回路12、13を備え、直流−交流変換回路3の出力する電力を制御して放電灯10の点灯制御を行う。直流−交流変換回路3が、交流変換用トランス7、スイッチング素子5H、5L、共振用コンデンサ8を有しており、共振用コンデンサ8と交流変換用トランス7のインダクタンス成分又はインダクタンス素子9とを直列共振させる。検出回路12、13は、交流変換用トランス7の検出用巻線7vやインダクタンス素子9を用いて放電灯10の電圧や電流を検出する。
【選択図】 図1
Description
・上記交流変換用トランスに設けられた検出用巻線(該巻線の出力から放電灯の電圧検出を行う。)
・上記検出回路を構成するコンデンサ及び整流素子(上記交流変換用トランスの巻線又は上記インダクタンス素子から検出した交流信号を直流信号に変換する。)
・放電灯の起動の際に上記交流変換用トランスの巻線から発生する高電圧に伴う検出電圧を抑制するための回路。
・放電灯の点灯時において、交流出力端子から放電灯に印加される電圧を直接的に検出する方法と同等の精度をもって電圧検出を行えるようにすること
・抵抗素子(シャント抵抗等)を用いることなく、充分に大きな検出振幅をもって放電灯の電流検出を行うことにより、回路の電力損失を低減し、精度の高い検出を行うこと。
(II)共振用コンデンサ8と、インダクタンス素子9及び交流変換用トランス7のリーケージ(漏れ)インダクタンスとの共振を利用した形態。
Claims (5)
- 直流入力を受けて交流への変換を行う直流−交流変換回路と、放電灯にかかる電圧又は該放電灯に流れる電流について検出する検出回路を備え、該直流−交流変換回路の出力する電力を制御して放電灯の点灯制御を行う放電灯点灯回路において、
上記直流−交流変換回路が、交流変換用トランスと、複数のスイッチング素子と、共振用コンデンサを有しており、該スイッチング素子を駆動して、共振用コンデンサと、交流変換用トランスのインダクタンス成分又は該共振用コンデンサに接続されたインダクタンス素子とを直列共振させるとともに、
上記検出回路が、上記交流変換用トランスの巻線又は上記インダクタンス素子を用いて上記放電灯の電圧検出又は電流検出を行う
ことを特徴とする放電灯点灯回路。 - 請求項1に記載した放電灯点灯回路において、
上記インダクタンス素子とともにトランスを形成する補助巻線を設け、該補助巻線の出力から上記放電灯の電流検出を行う
ことを特徴とする放電灯点灯回路。 - 請求項1又は請求項2に記載した放電灯点灯回路において、
上記交流変換用トランスの一次巻線若しくは二次巻線又は該トランスに設けられた検出用巻線の出力から上記放電灯の電圧検出を行う
ことを特徴とする放電灯点灯回路。 - 請求項1又は請求項2又は請求項3に記載した放電灯点灯回路において、
上記検出回路がコンデンサ及び整流素子を備えており、上記交流変換用トランスの巻線又は上記インダクタンス素子から検出した交流信号を直流信号に変換する
ことを特徴とする放電灯点灯回路。 - 請求項1又は請求項2又は請求項3又は請求項4に記載した放電灯点灯回路において、
上記放電灯の起動の際に上記交流変換用トランスの巻線から発生する高電圧に伴う検出電圧を抑制するための回路を、上記検出回路に設けた
ことを特徴とする放電灯点灯回路。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003292717A JP2005063823A (ja) | 2003-08-13 | 2003-08-13 | 放電灯点灯回路 |
US10/915,827 US20050035727A1 (en) | 2003-08-13 | 2004-08-11 | Discharge lamp illumination circuit |
DE102004039226A DE102004039226A1 (de) | 2003-08-13 | 2004-08-12 | Entladungsleuchtenansteuerschaltung |
FR0408864A FR2858911A1 (fr) | 2003-08-13 | 2004-08-13 | Circuit d'eclairage a lampe a decharge a detection de courant ou de tension |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003292717A JP2005063823A (ja) | 2003-08-13 | 2003-08-13 | 放電灯点灯回路 |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2005063823A true JP2005063823A (ja) | 2005-03-10 |
Family
ID=34114151
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2003292717A Pending JP2005063823A (ja) | 2003-08-13 | 2003-08-13 | 放電灯点灯回路 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20050035727A1 (ja) |
JP (1) | JP2005063823A (ja) |
DE (1) | DE102004039226A1 (ja) |
FR (1) | FR2858911A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007062767A1 (de) | 2006-12-27 | 2008-07-10 | Koito Manufacturing Co., Ltd. | Entladungslampen-Beleuchtungsschaltung |
JP2009065663A (ja) * | 2007-09-06 | 2009-03-26 | General Electric Co <Ge> | 高電圧、高速、高パルス繰返し数のパルス発生器 |
US7557513B2 (en) | 2006-07-20 | 2009-07-07 | Koito Manufacturing Co., Ltd. | Discharge lamp lighting circuit |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4202862B2 (ja) * | 2003-08-13 | 2008-12-24 | 株式会社小糸製作所 | 放電灯点灯回路 |
US7276864B2 (en) * | 2005-12-05 | 2007-10-02 | Hitachi Media Electronics Co., Ltd. | Discharge lamp lighting device and projection type image display apparatus having the same |
KR100703224B1 (ko) * | 2006-06-29 | 2007-04-09 | 삼성전기주식회사 | Lcd 백라이트 인버터용 전압 피드백 회로 |
ITBO20060086U1 (it) * | 2006-10-11 | 2008-04-12 | Ocem Spa | Unita' di regolazione della corrente in un circuito composto da sorgenti di illuminazione poste in serie |
JP2009176639A (ja) * | 2008-01-28 | 2009-08-06 | Panasonic Electric Works Co Ltd | 高圧放電灯点灯装置、照明器具 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2264596B (en) * | 1992-02-18 | 1995-06-14 | Standards Inst Singapore | A DC-AC converter for igniting and supplying a gas discharge lamp |
US5416387A (en) * | 1993-11-24 | 1995-05-16 | California Institute Of Technology | Single stage, high power factor, gas discharge lamp ballast |
US6057652A (en) * | 1995-09-25 | 2000-05-02 | Matsushita Electric Works, Ltd. | Power supply for supplying AC output power |
JP3760074B2 (ja) * | 2000-01-17 | 2006-03-29 | 株式会社小糸製作所 | 放電灯点灯回路 |
US6437515B1 (en) * | 2000-01-18 | 2002-08-20 | Matsushita Electric Works, Ltd. | Discharge lamp lighting device of high startability with high pulse voltage |
JP3975653B2 (ja) * | 2000-06-12 | 2007-09-12 | 松下電工株式会社 | 放電灯点灯装置 |
JP3802384B2 (ja) * | 2001-08-30 | 2006-07-26 | 株式会社小糸製作所 | 放電灯点灯回路 |
-
2003
- 2003-08-13 JP JP2003292717A patent/JP2005063823A/ja active Pending
-
2004
- 2004-08-11 US US10/915,827 patent/US20050035727A1/en not_active Abandoned
- 2004-08-12 DE DE102004039226A patent/DE102004039226A1/de not_active Ceased
- 2004-08-13 FR FR0408864A patent/FR2858911A1/fr not_active Withdrawn
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7557513B2 (en) | 2006-07-20 | 2009-07-07 | Koito Manufacturing Co., Ltd. | Discharge lamp lighting circuit |
DE102007062767A1 (de) | 2006-12-27 | 2008-07-10 | Koito Manufacturing Co., Ltd. | Entladungslampen-Beleuchtungsschaltung |
US7777429B2 (en) | 2006-12-27 | 2010-08-17 | Koito Manufacturing Co., Ltd. | Discharge lamp lighting circuit |
JP2009065663A (ja) * | 2007-09-06 | 2009-03-26 | General Electric Co <Ge> | 高電圧、高速、高パルス繰返し数のパルス発生器 |
Also Published As
Publication number | Publication date |
---|---|
FR2858911A1 (fr) | 2005-02-18 |
US20050035727A1 (en) | 2005-02-17 |
DE102004039226A1 (de) | 2005-09-01 |
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