JP2008210536A - 調光装置とそれを用いた照明器具 - Google Patents
調光装置とそれを用いた照明器具 Download PDFInfo
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Abstract
【解決手段】
調光装置は、LED1の調光信号を発生する調光器2と、調光信号を基にPWM制御信号及びアナログ制御信号を発生する制御信号発生部3と、PWM制御信号とアナログ制御信号とに基いてLED1に流れる電流を制御するLED制御部5とを備える。制御信号発生部3は、アナログ制御信号の基準値を記憶し、PWM信号のデューティ値が一定のときは、アナログ制御信号を基準値から増加または減少させてLED制御部6によるLED1に流れるアナログ電流を制御し、デューティ値が切り替わったときは、アナログ制御信号を基準値に戻すように制御する。これにより、デューティ間のLED1に流れる電流の不連続をアナログ電流で補完することができ、ちらつきを生じることなく調光範囲を広げることができる制御を安価に行うことができる。
【選択図】図1
Description
2 調光部
3 制御信号発生部
4 LED制御部
Claims (3)
- PWM制御とアナログ制御を組み合わせてLEDの出力を制御する調光装置において、
前記LEDの出力制御用の調光信号を発生する調光部と、
前記調光部からの調光信号に基いてPWM制御信号及びアナログ制御信号を発生する制御信号発生部と、
前記制御信号発生部からのPWM制御信号及びアナログ制御信号に基いて前記LEDに流れる電流を制御するLED制御部と、を備え、
前記制御信号発生部は、前記アナログ制御信号の基準値を記憶し、前記PWM信号のデューティ値が一定のときは、前記アナログ制御信号を前記基準値から増加または減少させて前記LED制御部による前記LEDに流れるアナログ電流を制御し、前記デューティ値が切り替わったときは、前記アナログ制御信号を前記基準値に戻すように制御することを特徴とした調光装置。 - 前記制御信号発生部は、前記LEDの出力値が所定値以下になったときに、前記LEDの出力の制御をアナログ制御のみに切替えることを特徴とする請求項1に記載の調光装置。
- 請求項1又は請求項2に記載の調光装置を備えたことを特徴とする照明器具。
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JP2007043347A JP4943891B2 (ja) | 2007-02-23 | 2007-02-23 | 調光装置とそれを用いた照明器具 |
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JP2007043347A JP4943891B2 (ja) | 2007-02-23 | 2007-02-23 | 調光装置とそれを用いた照明器具 |
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JP2008210536A true JP2008210536A (ja) | 2008-09-11 |
JP4943891B2 JP4943891B2 (ja) | 2012-05-30 |
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JP2007043347A Expired - Fee Related JP4943891B2 (ja) | 2007-02-23 | 2007-02-23 | 調光装置とそれを用いた照明器具 |
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Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011070957A (ja) * | 2009-09-25 | 2011-04-07 | Toshiba Lighting & Technology Corp | 照明装置 |
JP2011150878A (ja) * | 2010-01-21 | 2011-08-04 | Toshiba Lighting & Technology Corp | Led点灯装置および照明装置 |
JP2012023010A (ja) * | 2010-07-12 | 2012-02-02 | O2 Micro Inc | 光源の調光制御のための回路及び方法 |
JP2012100887A (ja) * | 2010-11-10 | 2012-05-31 | Fujifilm Corp | 内視鏡装置 |
JP2013110206A (ja) * | 2011-11-18 | 2013-06-06 | Yamaha Corp | Ledドライバ |
US8646941B1 (en) | 2010-06-14 | 2014-02-11 | Humanscale Corporation | Lighting apparatus and method |
US8664895B2 (en) | 2010-03-04 | 2014-03-04 | O2Micro, Inc. | Circuits and methods for driving light sources |
US8698419B2 (en) | 2010-03-04 | 2014-04-15 | O2Micro, Inc. | Circuits and methods for driving light sources |
US8866398B2 (en) | 2012-05-11 | 2014-10-21 | O2Micro, Inc. | Circuits and methods for driving light sources |
US9030122B2 (en) | 2008-12-12 | 2015-05-12 | O2Micro, Inc. | Circuits and methods for driving LED light sources |
KR101546125B1 (ko) | 2013-05-08 | 2015-08-20 | 한국광기술원 | 조명 출력 제어 장치 및 방법 |
TWI507080B (zh) * | 2012-08-08 | 2015-11-01 | Innocom Tech Shenzhen Co Ltd | 調光電路及其調光方法 |
US9232591B2 (en) | 2008-12-12 | 2016-01-05 | O2Micro Inc. | Circuits and methods for driving light sources |
US9253843B2 (en) | 2008-12-12 | 2016-02-02 | 02Micro Inc | Driving circuit with dimming controller for driving light sources |
US9386653B2 (en) | 2008-12-12 | 2016-07-05 | O2Micro Inc | Circuits and methods for driving light sources |
CN106341920A (zh) * | 2015-07-09 | 2017-01-18 | 松下知识产权经营株式会社 | 点亮装置、车辆用照明装置和车辆 |
US9756689B2 (en) | 2015-08-25 | 2017-09-05 | Panasonic Intellectual Property Management Co., Ltd. | Light output control device, illumination system, and facility apparatus |
CN108271286A (zh) * | 2016-12-30 | 2018-07-10 | 上海新进半导体制造有限公司 | 一种led调光驱动电路以及开关电源 |
CN110621099A (zh) * | 2018-06-20 | 2019-12-27 | 台达电子工业股份有限公司 | 多模式电流控制方法及调光电路 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01186594A (ja) * | 1988-01-13 | 1989-07-26 | Matsushita Electric Works Ltd | 調光装置 |
JP2002199708A (ja) * | 2000-12-22 | 2002-07-12 | Hitachi Ltd | Dc−dcコンバータ |
JP2005267999A (ja) * | 2004-03-18 | 2005-09-29 | Toshiba Lighting & Technology Corp | Led式照明装置 |
-
2007
- 2007-02-23 JP JP2007043347A patent/JP4943891B2/ja not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01186594A (ja) * | 1988-01-13 | 1989-07-26 | Matsushita Electric Works Ltd | 調光装置 |
JP2002199708A (ja) * | 2000-12-22 | 2002-07-12 | Hitachi Ltd | Dc−dcコンバータ |
JP2005267999A (ja) * | 2004-03-18 | 2005-09-29 | Toshiba Lighting & Technology Corp | Led式照明装置 |
Cited By (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9386653B2 (en) | 2008-12-12 | 2016-07-05 | O2Micro Inc | Circuits and methods for driving light sources |
US9030122B2 (en) | 2008-12-12 | 2015-05-12 | O2Micro, Inc. | Circuits and methods for driving LED light sources |
US9253843B2 (en) | 2008-12-12 | 2016-02-02 | 02Micro Inc | Driving circuit with dimming controller for driving light sources |
US9232591B2 (en) | 2008-12-12 | 2016-01-05 | O2Micro Inc. | Circuits and methods for driving light sources |
JP2011070957A (ja) * | 2009-09-25 | 2011-04-07 | Toshiba Lighting & Technology Corp | 照明装置 |
JP2011150878A (ja) * | 2010-01-21 | 2011-08-04 | Toshiba Lighting & Technology Corp | Led点灯装置および照明装置 |
US8664895B2 (en) | 2010-03-04 | 2014-03-04 | O2Micro, Inc. | Circuits and methods for driving light sources |
US8698419B2 (en) | 2010-03-04 | 2014-04-15 | O2Micro, Inc. | Circuits and methods for driving light sources |
US8890440B2 (en) | 2010-03-04 | 2014-11-18 | O2Micro, Inc. | Circuits and methods for driving light sources |
US8646941B1 (en) | 2010-06-14 | 2014-02-11 | Humanscale Corporation | Lighting apparatus and method |
JP2012023010A (ja) * | 2010-07-12 | 2012-02-02 | O2 Micro Inc | 光源の調光制御のための回路及び方法 |
JP2012100887A (ja) * | 2010-11-10 | 2012-05-31 | Fujifilm Corp | 内視鏡装置 |
JP2013110206A (ja) * | 2011-11-18 | 2013-06-06 | Yamaha Corp | Ledドライバ |
US8866398B2 (en) | 2012-05-11 | 2014-10-21 | O2Micro, Inc. | Circuits and methods for driving light sources |
TWI507080B (zh) * | 2012-08-08 | 2015-11-01 | Innocom Tech Shenzhen Co Ltd | 調光電路及其調光方法 |
KR101546125B1 (ko) | 2013-05-08 | 2015-08-20 | 한국광기술원 | 조명 출력 제어 장치 및 방법 |
CN106341920A (zh) * | 2015-07-09 | 2017-01-18 | 松下知识产权经营株式会社 | 点亮装置、车辆用照明装置和车辆 |
JP2017021953A (ja) * | 2015-07-09 | 2017-01-26 | パナソニックIpマネジメント株式会社 | 点灯装置、車両用照明装置、及びそれを用いた車両 |
CN106341920B (zh) * | 2015-07-09 | 2019-10-29 | 松下知识产权经营株式会社 | 点亮装置、车辆用照明装置和车辆 |
US9756689B2 (en) | 2015-08-25 | 2017-09-05 | Panasonic Intellectual Property Management Co., Ltd. | Light output control device, illumination system, and facility apparatus |
CN108271286A (zh) * | 2016-12-30 | 2018-07-10 | 上海新进半导体制造有限公司 | 一种led调光驱动电路以及开关电源 |
CN110621099A (zh) * | 2018-06-20 | 2019-12-27 | 台达电子工业股份有限公司 | 多模式电流控制方法及调光电路 |
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