JP5937455B2 - Led駆動回路 - Google Patents
Led駆動回路 Download PDFInfo
- Publication number
- JP5937455B2 JP5937455B2 JP2012174908A JP2012174908A JP5937455B2 JP 5937455 B2 JP5937455 B2 JP 5937455B2 JP 2012174908 A JP2012174908 A JP 2012174908A JP 2012174908 A JP2012174908 A JP 2012174908A JP 5937455 B2 JP5937455 B2 JP 5937455B2
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- Prior art keywords
- current
- adjusting unit
- fet
- resistor
- led
- 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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- 239000003990 capacitor Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims 2
- 230000007423 decrease Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000020169 heat generation Effects 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
Images
Classifications
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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
- H05B45/14—Controlling the intensity of the light using electrical feedback from LEDs or from LED modules
-
- 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]
- H05B45/38—Switched mode power supply [SMPS] using boost topology
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
- Led Devices (AREA)
- Dc-Dc Converters (AREA)
Description
Claims (10)
- 電源部と、
前記電源部の信号が入力されるLEDアレイと、
前記LEDアレイと連結されるICと、
前記ICで認識される出力電流を徐々に増加させる突入電流制限部と、を含み、
前記突入電流制限部は、周波数調節部及び電流調節部のうち、少なくとも1つを含み、
前記周波数調節部は、第1FET、第1キャパシタ、及び第1抵抗を含み、前記第1抵抗は一端が接地と連結され、他端が前記第1FETのゲートと連結され、
前記電流調節部は、第2FET、第2キャパシタ、及び第2抵抗を含み、前記第2キャパシタは一端が接地と連結され、他端が前記第2FETのゲートと連結されることを特徴とする、LED駆動回路。 - 前記第1FETは、N型FETであることを特徴とする、請求項1に記載のLED駆動回路。
- 前記N型FETのドレインに連結された抵抗を含むことを特徴とする、請求項2に記載のLED駆動回路。
- 前記第2FETはN型FETであることを特徴とする、請求項1に記載のLED駆動回路。
- 前記N型FETのドレインに連結された抵抗を含むことを特徴とする、請求項4に記載のLED駆動回路。
- 前記周波数調節部及び電流調節部は同時に備えられ、前記周波数調節部及び電流調節部は並列に連結されることを特徴とする、請求項1〜5のいずれか一項に記載のLED駆動回路。
- 前記周波数調節部及び電流調節部は、電圧分配抵抗により分圧された電圧が入力されることを特徴とする、請求項6に記載のLED駆動回路。
- 前記電圧分配抵抗により分圧された電圧は直列に連結された第4抵抗を通じて電流調節部に入力され、直列に連結された第1キャパシタを通じて周波数調節部に入力されることを特徴とする、請求項7に記載のLED駆動回路。
- 電源部と、
前記電源部の信号が入力されるLEDアレイと、
前記LEDアレイと連結されるICと、
前記ICで認識される出力電流を徐々に増加させる突入電流制限部と、を含み、
前記突入電流制限部は、周波数調節部及び電流調節部を含み、前記周波数調節部はP型FETを含み、前記電流調節部はN型FETを含み、前記P型FET及びN型FETのゲート端には同一な電圧が入力されることを特徴とする、LED駆動回路。 - 前記電流調節部は、FET、キャパシタ、及び抵抗を含み、前記キャパシタは一端が接地と連結され、他端が前記FETのゲートと連結されることを特徴とする、請求項9に記載のLED駆動回路。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2011-0106109 | 2011-10-17 | ||
KR1020110106109A KR102019051B1 (ko) | 2011-10-17 | 2011-10-17 | Led 구동회로 |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2013089591A JP2013089591A (ja) | 2013-05-13 |
JP2013089591A5 JP2013089591A5 (ja) | 2015-09-10 |
JP5937455B2 true JP5937455B2 (ja) | 2016-06-22 |
Family
ID=48085540
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2012174908A Active JP5937455B2 (ja) | 2011-10-17 | 2012-08-07 | Led駆動回路 |
Country Status (4)
Country | Link |
---|---|
US (1) | US8975833B2 (ja) |
JP (1) | JP5937455B2 (ja) |
KR (1) | KR102019051B1 (ja) |
TW (1) | TWI576005B (ja) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102651200B (zh) * | 2011-03-30 | 2014-04-16 | 京东方科技集团股份有限公司 | 液晶背光源驱动电路 |
CN202454225U (zh) * | 2011-10-28 | 2012-09-26 | 深圳市华星光电技术有限公司 | Led背光驱动电路以及显示装置 |
US9107265B2 (en) * | 2013-12-02 | 2015-08-11 | Richtek Technology Corporation | Light emitting device array billboard and control method thereof |
CN103985359A (zh) * | 2014-04-16 | 2014-08-13 | 京东方科技集团股份有限公司 | 一种背光源驱动电路和显示装置 |
CN103957644B (zh) * | 2014-05-14 | 2017-04-26 | 深圳市华星光电技术有限公司 | 用于液晶显示设备的led背光源 |
US9420658B2 (en) * | 2014-12-05 | 2016-08-16 | Xenio Corporation | Inrush energy control for a light emitter |
CN106782349B (zh) * | 2017-01-04 | 2019-01-22 | 深圳市华星光电技术有限公司 | 一种led背光驱动电路及液晶显示器 |
US10575377B2 (en) * | 2017-11-22 | 2020-02-25 | Semiconductor Components Industries, Llc | Line ripple reducer |
CN209218434U (zh) * | 2018-09-25 | 2019-08-06 | 福建省亿宝光电科技有限公司 | 一种灯带电路 |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5420780A (en) * | 1993-12-30 | 1995-05-30 | Omega Power Systems | Apparatus for limiting inrush current |
JP2008529177A (ja) * | 2005-02-02 | 2008-07-31 | キャップ−エックス・エックス・リミテッド | 電源装置 |
KR20080055085A (ko) * | 2006-12-14 | 2008-06-19 | 엘지이노텍 주식회사 | 인버터의 초기주파수 가변회로 |
EP2106675B1 (en) * | 2007-01-22 | 2018-11-07 | Philips Intellectual Property & Standards GmbH | Organic light emitting diode arrangement |
US20100109554A1 (en) * | 2007-04-25 | 2010-05-06 | Osram Gesellschaft Mit Beschraenkter Haftung | Illumination device having inrush current limiting circuit |
KR100889528B1 (ko) * | 2007-06-27 | 2009-03-19 | 삼성에스디아이 주식회사 | 소프트 스타트 회로와 이를 포함하는 전원공급장치 |
US8022634B2 (en) * | 2008-02-05 | 2011-09-20 | Intersil Americas Inc. | Method and system for dimming AC-powered light emitting diode (LED) lighting systems using conventional incandescent dimmers |
JP2009283401A (ja) * | 2008-05-26 | 2009-12-03 | Panasonic Electric Works Co Ltd | 電源装置および灯具、車両 |
GB2475634B (en) * | 2008-09-18 | 2013-04-10 | Craftsmen Corp E | Configurable LED driver/dimmer for solid state lighting applications |
US8120273B2 (en) * | 2008-10-28 | 2012-02-21 | Visteon Global Technologies, Inc. | Light control system with PWM duty cycle control using current signal feedback |
JP2010129612A (ja) * | 2008-11-25 | 2010-06-10 | Panasonic Electric Works Co Ltd | 点灯装置 |
US9167641B2 (en) * | 2008-11-28 | 2015-10-20 | Lightech Electronic Industries Ltd. | Phase controlled dimming LED driver system and method thereof |
KR101007035B1 (ko) * | 2008-12-22 | 2011-01-12 | 엘지이노텍 주식회사 | 발광 다이오드용 전원 공급 장치 |
US8339055B2 (en) * | 2009-08-03 | 2012-12-25 | Intersil Americas Inc. | Inrush current limiter for an LED driver |
KR20110033485A (ko) * | 2009-09-25 | 2011-03-31 | (주)빅텍 | 돌입전류제한회로 |
JP2011151913A (ja) * | 2010-01-20 | 2011-08-04 | Mitsubishi Electric Corp | 電源回路及び照明装置 |
JP5174061B2 (ja) * | 2010-02-23 | 2013-04-03 | 三菱電機照明株式会社 | 電源装置及び照明器具 |
KR20120015232A (ko) * | 2010-08-11 | 2012-02-21 | 삼성엘이디 주식회사 | Led 램프 및 led 램프용 구동 회로 |
-
2011
- 2011-10-17 KR KR1020110106109A patent/KR102019051B1/ko active IP Right Grant
-
2012
- 2012-07-20 TW TW101126234A patent/TWI576005B/zh active
- 2012-08-07 JP JP2012174908A patent/JP5937455B2/ja active Active
- 2012-10-16 US US13/652,769 patent/US8975833B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
TW201318470A (zh) | 2013-05-01 |
TWI576005B (zh) | 2017-03-21 |
KR102019051B1 (ko) | 2019-09-09 |
KR20130041685A (ko) | 2013-04-25 |
US8975833B2 (en) | 2015-03-10 |
US20130093355A1 (en) | 2013-04-18 |
JP2013089591A (ja) | 2013-05-13 |
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