JP2005512334A - Pwm出力を具えたled駆動回路 - Google Patents
Pwm出力を具えたled駆動回路 Download PDFInfo
- Publication number
- JP2005512334A JP2005512334A JP2003550561A JP2003550561A JP2005512334A JP 2005512334 A JP2005512334 A JP 2005512334A JP 2003550561 A JP2003550561 A JP 2003550561A JP 2003550561 A JP2003550561 A JP 2003550561A JP 2005512334 A JP2005512334 A JP 2005512334A
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- Prior art keywords
- power supply
- signal
- led
- current
- led array
- 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.)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
- B60Q1/2607—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic comprising at least two indicating lamps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
- B60Q1/2696—Mounting of devices using LEDs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
- B60Q1/44—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating braking action or preparation for braking, e.g. by detection of the foot approaching the brake pedal
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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
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
-
- 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
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
- Control Of El Displays (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
- Amplifiers (AREA)
- Led Devices (AREA)
Abstract
Description
上記の欠点を解消するLED用駆動回路が望まれている。
本発明の他の特徴は公称電流でのLED動作を維持するLED用駆動回路提供することにある。
本発明の上記の特徴及び他の特徴は以下の好適実施例の詳細な説明を図面と関連して読めば明らかになる。以下の詳細の説明及び図面は本発明の単なる一例であって、特許請求の範囲の記載及びその均等記載により限定される本発明の範囲を限定するものではない。
Claims (9)
- LEDアレイを給電するLED電源システムであって、
LEDアレイへの電流を検知し、検知電流信号を発生する電流検知手段と、
基準信号を発生する基準信号発生手段と、
前記検知電流信号を前記基準と比較し、帰還信号を発生する比較手段と、
前記帰還信号に応答してパルス幅変調を行い駆動信号を発生するパルス幅変調手段と、
前記駆動信号に応答して前記LEDアレイに電流を供給する電源手段とを具えることを特徴とするLED電源システム。 - 第1状態と第2状態を有する発信信号を発生する低周波数発振手段を更に具え、
前記電源手段は、前記発振信号に応答して、第1状態の間LEDアレイに電流を供給し、第2状態の間前記LEDアレイへの電流を阻止することを特徴とする請求項0記載のLED電源システム。 - 前記発振信号の周波数は前記駆動信号の周波数より低いことを特徴とする請求項0記載のLED電源システム。
- 前記発振信号のデューティサイクルは約10%であることを特徴とする請求項0記載のLED電源システム。
- 前記発振信号の周波数は約200〜300Hzであることを特徴とする請求項0記載のLED電源システム。
- 前記パルス幅変調手段は、前記低周波数発振手段からの発振信号に応答し、第1状態の間前記駆動信号を前記電源手段に供給し、第2状態の間前記駆動信号を前記電源手段へ供給するのを阻止することを特徴とする請求項0記載のLED電源システム。
- 前記パルス幅変調手段は該パルス幅変調手段からの駆動信号を前記低周波数発振手段からの発振信号と同期させることを特徴とする請求項0記載のLED電源システム。
- 前記LEDアレイが動作不能であることを指示する手段を更に具えることを特徴とする請求項0記載のLED電源システム。
- 前記電源手段はバック・ブースト電源、ブースト電源、バック電源及びフライバックコンバータからなる群から選ばれた電源からなることを特徴とする請求項1記載のLED電源システム。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/012,000 US6586890B2 (en) | 2001-12-05 | 2001-12-05 | LED driver circuit with PWM output |
PCT/IB2002/004798 WO2003049505A1 (en) | 2001-12-05 | 2002-11-15 | Led driver circuit with pwm output |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2005512334A true JP2005512334A (ja) | 2005-04-28 |
JP2005512334A5 JP2005512334A5 (ja) | 2005-12-22 |
JP4353804B2 JP4353804B2 (ja) | 2009-10-28 |
Family
ID=21752905
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2003550561A Expired - Lifetime JP4353804B2 (ja) | 2001-12-05 | 2002-11-15 | Pwm出力を具えたled駆動回路 |
Country Status (8)
Country | Link |
---|---|
US (1) | US6586890B2 (ja) |
EP (1) | EP1459599B2 (ja) |
JP (1) | JP4353804B2 (ja) |
CN (1) | CN100446629C (ja) |
AT (1) | ATE387832T1 (ja) |
AU (1) | AU2002348912A1 (ja) |
DE (1) | DE60225333T3 (ja) |
WO (1) | WO2003049505A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009538496A (ja) * | 2006-05-23 | 2009-11-05 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 自動車用ランプモジュール及びled照明素子を備える照明ユニット |
JP2010521946A (ja) * | 2007-03-13 | 2010-06-24 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 電源供給回路 |
JP2012238755A (ja) * | 2011-05-12 | 2012-12-06 | Panasonic Corp | 固体光源点灯装置およびそれを用いた照明器具 |
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FR2772154A1 (fr) * | 1997-12-09 | 1999-06-04 | Motorola Semiconducteurs | Circuit de commande pour la correction du facteur de puissance |
EP0967590A1 (en) * | 1998-06-25 | 1999-12-29 | Hewlett-Packard Company | Optical display device using LEDs and its operating method |
FI106770B (fi) * | 1999-01-22 | 2001-03-30 | Nokia Mobile Phones Ltd | Valaiseva elektroninen laite ja valaisumenetelmä |
DE29919006U1 (de) * | 1999-03-08 | 2000-05-04 | Bebenroth Guenther | Schaltungsanordnung zum Betreiben eines Leuchtkörpers |
DE19930174A1 (de) * | 1999-06-30 | 2001-01-04 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Ansteuerschaltung für LED und zugehöriges Betriebsverfahren |
CA2343062A1 (en) * | 1999-07-07 | 2001-01-18 | Koninklijke Philips Electronics N.V. | Flyback converter as led driver |
DE19950135A1 (de) * | 1999-10-18 | 2001-04-19 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Ansteuerschaltung für LED und zugehöriges Betriebsverfahren |
JP3445540B2 (ja) * | 1999-11-16 | 2003-09-08 | 常盤電業株式会社 | 電源回路 |
US6362578B1 (en) * | 1999-12-23 | 2002-03-26 | Stmicroelectronics, Inc. | LED driver circuit and method |
KR100735943B1 (ko) † | 2000-02-03 | 2007-07-06 | 코닌클리즈케 필립스 일렉트로닉스 엔.브이. | Led 발광 모듈용 공급 어셈블리 |
DE10025821A1 (de) * | 2000-05-25 | 2002-07-25 | Sickinger Monika | Led-Lichtquelle |
-
2001
- 2001-12-05 US US10/012,000 patent/US6586890B2/en not_active Expired - Lifetime
-
2002
- 2002-11-15 CN CNB02824219XA patent/CN100446629C/zh not_active Expired - Lifetime
- 2002-11-15 DE DE60225333T patent/DE60225333T3/de not_active Expired - Lifetime
- 2002-11-15 JP JP2003550561A patent/JP4353804B2/ja not_active Expired - Lifetime
- 2002-11-15 AT AT02781532T patent/ATE387832T1/de not_active IP Right Cessation
- 2002-11-15 AU AU2002348912A patent/AU2002348912A1/en not_active Abandoned
- 2002-11-15 EP EP02781532A patent/EP1459599B2/en not_active Expired - Lifetime
- 2002-11-15 WO PCT/IB2002/004798 patent/WO2003049505A1/en active IP Right Grant
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009538496A (ja) * | 2006-05-23 | 2009-11-05 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 自動車用ランプモジュール及びled照明素子を備える照明ユニット |
JP2010521946A (ja) * | 2007-03-13 | 2010-06-24 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 電源供給回路 |
JP2012238755A (ja) * | 2011-05-12 | 2012-12-06 | Panasonic Corp | 固体光源点灯装置およびそれを用いた照明器具 |
Also Published As
Publication number | Publication date |
---|---|
DE60225333T2 (de) | 2009-02-26 |
EP1459599B2 (en) | 2012-11-07 |
CN100446629C (zh) | 2008-12-24 |
WO2003049505A1 (en) | 2003-06-12 |
EP1459599A1 (en) | 2004-09-22 |
JP4353804B2 (ja) | 2009-10-28 |
DE60225333D1 (de) | 2008-04-10 |
CN1600047A (zh) | 2005-03-23 |
US6586890B2 (en) | 2003-07-01 |
DE60225333T3 (de) | 2013-03-21 |
AU2002348912A1 (en) | 2003-06-17 |
ATE387832T1 (de) | 2008-03-15 |
EP1459599B1 (en) | 2008-02-27 |
US20030102819A1 (en) | 2003-06-05 |
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