JP7184183B2 - Ｌｅｄ駆動回路 - Google Patents

Ｌｅｄ駆動回路 Download PDF

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Publication number
JP7184183B2
JP7184183B2 JP2021522184A JP2021522184A JP7184183B2 JP 7184183 B2 JP7184183 B2 JP 7184183B2 JP 2021522184 A JP2021522184 A JP 2021522184A JP 2021522184 A JP2021522184 A JP 2021522184A JP 7184183 B2 JP7184183 B2 JP 7184183B2
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JP
Japan
Prior art keywords
resistor
led
npn transistor
ptc thermistor
switching element
Prior art date
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Active
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JP2021522184A
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English (en)
Japanese (ja)
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JPWO2020241247A1 (https=
Inventor
有民 西郷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Murata Manufacturing Co Ltd
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Murata Manufacturing Co Ltd
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Publication date
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Publication of JPWO2020241247A1 publication Critical patent/JPWO2020241247A1/ja
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Publication of JP7184183B2 publication Critical patent/JP7184183B2/ja
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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]
    • H05B45/30—Driver circuits
    • H05B45/345—Current stabilisation; Maintaining constant current
    • 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]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • H05B45/56—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits involving measures to prevent abnormal temperature of the LEDs
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
    • H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
    • H10H20/80—Constructional details

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  • Led Devices (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
JP2021522184A 2019-05-28 2020-05-12 Ｌｅｄ駆動回路 Active JP7184183B2 (ja)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2019099280 2019-05-28
JP2019099280 2019-05-28
PCT/JP2020/019016 WO2020241247A1 (ja) 2019-05-28 2020-05-12 Ｌｅｄ駆動回路

Publications (2)

Publication Number Publication Date
JPWO2020241247A1 JPWO2020241247A1 (https=) 2020-12-03
JP7184183B2 true JP7184183B2 (ja) 2022-12-06

Family

ID=73553991

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2021522184A Active JP7184183B2 (ja) 2019-05-28 2020-05-12 Ｌｅｄ駆動回路

Country Status (5)

Country Link
US (1) US11785686B2 (https=)
JP (1) JP7184183B2 (https=)
CN (1) CN113924661B (https=)
DE (1) DE112020002722B4 (https=)
WO (1) WO2020241247A1 (https=)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001339286A (ja) 2000-05-26 2001-12-07 Atsumi Electric Co Ltd ビームセンサの投光回路
JP2009267065A (ja) 2008-04-24 2009-11-12 Toyoda Gosei Co Ltd Ｌｅｄ駆動回路およびｌｅｄ照明装置
JP2010062349A (ja) 2008-08-06 2010-03-18 Sharp Corp Ｌｅｄ駆動回路
JP2014146423A (ja) 2013-01-25 2014-08-14 Panasonic Corp 電流バイパス回路、照明用光源及び照明装置
CN205883643U (zh) 2015-10-17 2017-01-11 广东瑞德智能科技股份有限公司 一种led灯简易式过热及过流保护电路

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0832361A (ja) 1994-07-14 1996-02-02 Toyota Autom Loom Works Ltd 保護装置付き増幅回路
JPH09325719A (ja) * 1996-05-31 1997-12-16 Sanyo Electric Co Ltd 太陽電池型表示装置
JPH11298044A (ja) * 1998-04-16 1999-10-29 Sony Corp 光源駆動回路
JP2006222219A (ja) * 2005-02-09 2006-08-24 Nec Viewtechnology Ltd Ｌｅｄ駆動回路
US8111011B1 (en) 2007-01-11 2012-02-07 Leotek Electronics Corporation LED luminaire with improved life and operation management
CN101646290B (zh) 2008-08-06 2012-10-31 夏普株式会社 Led驱动电路
SI23077A (sl) 2009-06-03 2010-12-31 Technoplast D.O.O. Vezje za temperaturno krmiljenje led diode
EP2472707B1 (en) * 2009-08-27 2017-01-04 Fuji Electric Co., Ltd. Semiconductor drive device
US8878443B2 (en) * 2012-04-11 2014-11-04 Osram Sylvania Inc. Color correlated temperature correction for LED strings
CN108954022B (zh) * 2017-05-22 2021-07-23 卡任特照明解决方案有限公司 Led灯及应用于该led灯的温度控制电路
CN110945364B (zh) * 2017-08-05 2021-08-03 株式会社村田制作所 风速测定装置和风量测定装置
CN207705762U (zh) * 2017-12-29 2018-08-07 福建省苍乐电子企业有限公司 一种过温保护电路

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001339286A (ja) 2000-05-26 2001-12-07 Atsumi Electric Co Ltd ビームセンサの投光回路
JP2009267065A (ja) 2008-04-24 2009-11-12 Toyoda Gosei Co Ltd Ｌｅｄ駆動回路およびｌｅｄ照明装置
JP2010062349A (ja) 2008-08-06 2010-03-18 Sharp Corp Ｌｅｄ駆動回路
JP2014146423A (ja) 2013-01-25 2014-08-14 Panasonic Corp 電流バイパス回路、照明用光源及び照明装置
CN205883643U (zh) 2015-10-17 2017-01-11 广东瑞德智能科技股份有限公司 一种led灯简易式过热及过流保护电路

Also Published As

Publication number Publication date
DE112020002722B4 (de) 2023-03-02
CN113924661A (zh) 2022-01-11
DE112020002722T5 (de) 2022-02-17
US11785686B2 (en) 2023-10-10
CN113924661B (zh) 2024-02-13
US20220039232A1 (en) 2022-02-03
JPWO2020241247A1 (https=) 2020-12-03
WO2020241247A1 (ja) 2020-12-03

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