FI20135877A - PWM dimming - Google Patents

PWM dimming Download PDF

Info

Publication number
FI20135877A
FI20135877A FI20135877A FI20135877A FI20135877A FI 20135877 A FI20135877 A FI 20135877A FI 20135877 A FI20135877 A FI 20135877A FI 20135877 A FI20135877 A FI 20135877A FI 20135877 A FI20135877 A FI 20135877A
Authority
FI
Finland
Prior art keywords
pwm dimming
dimming
pwm
Prior art date
Application number
FI20135877A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI125106B (en
Inventor
Markus Marttila
Original Assignee
Helvar Oy Ab
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Helvar Oy Ab filed Critical Helvar Oy Ab
Priority to FI20135877A priority Critical patent/FI125106B/en
Priority to EP14182057.1A priority patent/EP2854485B1/en
Publication of FI20135877A publication Critical patent/FI20135877A/en
Application granted granted Critical
Publication of FI125106B publication Critical patent/FI125106B/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K9/00—Demodulating pulses which have been modulated with a continuously-variable signal
    • H03K9/08—Demodulating pulses which have been modulated with a continuously-variable signal of duration- or width-mudulated pulses or of duty-cycle modulated pulses
    • 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
    • H05B45/32—Pulse-control circuits
    • H05B45/325—Pulse-width modulation [PWM]
    • 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
    • H05B44/00—Circuit arrangements for operating electroluminescent light sources
    • 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]
    • 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
    • H05B45/59—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits for reducing or suppressing flicker or glow effects
    • 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]
    • H05B45/375—Switched mode power supply [SMPS] using buck topology
    • 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
    • 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]
    • H05B45/385—Switched mode power supply [SMPS] using flyback topology
    • 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]
    • H05B45/39—Circuits containing inverter bridges
    • 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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
FI20135877A 2013-08-30 2013-08-30 PWM dimming FI125106B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FI20135877A FI125106B (en) 2013-08-30 2013-08-30 PWM dimming
EP14182057.1A EP2854485B1 (en) 2013-08-30 2014-08-25 PWM dimming

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20135877 2013-08-30
FI20135877A FI125106B (en) 2013-08-30 2013-08-30 PWM dimming

Publications (2)

Publication Number Publication Date
FI20135877A true FI20135877A (en) 2015-03-01
FI125106B FI125106B (en) 2015-06-15

Family

ID=51421836

Family Applications (1)

Application Number Title Priority Date Filing Date
FI20135877A FI125106B (en) 2013-08-30 2013-08-30 PWM dimming

Country Status (2)

Country Link
EP (1) EP2854485B1 (en)
FI (1) FI125106B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115326725A (en) * 2022-09-13 2022-11-11 上海博取仪器有限公司 Chemical oxygen demand detection system with automatic switching of high and low measuring ranges

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108696971B (en) * 2017-04-07 2024-02-20 上海鸣志自动控制设备有限公司 Control method of control system compatible with DALI and PWM dimming interface
CN109831843B (en) * 2017-11-23 2021-03-23 立锜科技股份有限公司 Light-emitting element driving device with multiple dimming modes and conversion control circuit thereof

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7884558B2 (en) * 2006-07-14 2011-02-08 Wolfson Microelectronics Plc Driver apparatus and method
US7535183B2 (en) * 2007-04-27 2009-05-19 Korry Electronics Co. Apparatus and method to provide a hybrid linear/switching current source, such as for high-efficiency, wide dimming range light emitting diode (LED) backlighting
WO2009156891A1 (en) * 2008-06-26 2009-12-30 Nxp B.V. Switch mode power supplies
US8004201B2 (en) * 2009-03-06 2011-08-23 Himax Analogic, Inc. LED circuit
US8248114B2 (en) * 2009-10-14 2012-08-21 Semiconductor Components Industries, Llc Circuit having sample and hold feedback control and method
JPWO2011055533A1 (en) * 2009-11-04 2013-03-28 ローム株式会社 Driving circuit and driving method for backlight LED string, and backlight and display device using the same
US8198832B2 (en) * 2010-08-13 2012-06-12 Linear Technology Corporation Method and system for extending PWM dimming range in LED drivers
JP2012094457A (en) * 2010-10-28 2012-05-17 Jimbo Electric Co Ltd Led drive circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115326725A (en) * 2022-09-13 2022-11-11 上海博取仪器有限公司 Chemical oxygen demand detection system with automatic switching of high and low measuring ranges
CN115326725B (en) * 2022-09-13 2024-05-14 上海博取仪器有限公司 Chemical oxygen demand detecting system capable of automatically switching high range and low range

Also Published As

Publication number Publication date
EP2854485A1 (en) 2015-04-01
EP2854485B1 (en) 2019-06-12
FI125106B (en) 2015-06-15

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