CA2805945C - Led control using modulation frequency detection techniques - Google Patents

Led control using modulation frequency detection techniques Download PDF

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Publication number
CA2805945C
CA2805945C CA2805945A CA2805945A CA2805945C CA 2805945 C CA2805945 C CA 2805945C CA 2805945 A CA2805945 A CA 2805945A CA 2805945 A CA2805945 A CA 2805945A CA 2805945 C CA2805945 C CA 2805945C
Authority
CA
Canada
Prior art keywords
led
brightness
signal
modulation frequency
channel
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.)
Expired - Fee Related
Application number
CA2805945A
Other languages
English (en)
French (fr)
Other versions
CA2805945A1 (en
Inventor
Ming Li
Kerry Denvir
Philip E. Moskowitz
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.)
Osram Sylvania Inc
Original Assignee
Osram Sylvania Inc
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
Priority claimed from US12/874,201 external-priority patent/US8258709B2/en
Application filed by Osram Sylvania Inc filed Critical Osram Sylvania Inc
Publication of CA2805945A1 publication Critical patent/CA2805945A1/en
Application granted granted Critical
Publication of CA2805945C publication Critical patent/CA2805945C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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]
    • H05B45/20—Controlling the colour of the light
    • H05B45/22—Controlling the colour of the light using optical feedback
    • 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]
    • H05B45/20—Controlling the colour 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]
    • H05B45/40—Details of LED load circuits
    • H05B45/44—Details of LED load circuits with an active control inside an LED matrix
    • H05B45/46—Details of LED load circuits with an active control inside an LED matrix having LEDs disposed in parallel lines

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Led Devices (AREA)
CA2805945A 2010-09-01 2011-09-01 Led control using modulation frequency detection techniques Expired - Fee Related CA2805945C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US12/874,201 US8258709B2 (en) 2010-09-01 2010-09-01 LED control using modulation frequency detection techniques
US12/874,201 2010-09-01
US13/077,669 US8390205B2 (en) 2010-09-01 2011-03-31 LED control using modulation frequency detection techniques
US13/077,669 2011-03-31
PCT/US2011/050192 WO2012031110A1 (en) 2010-09-01 2011-09-01 Led control using modulation frequency detection techniques

Publications (2)

Publication Number Publication Date
CA2805945A1 CA2805945A1 (en) 2012-03-08
CA2805945C true CA2805945C (en) 2016-06-21

Family

ID=45696236

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2805945A Expired - Fee Related CA2805945C (en) 2010-09-01 2011-09-01 Led control using modulation frequency detection techniques

Country Status (7)

Country Link
US (1) US8390205B2 (enExample)
EP (1) EP2612541B1 (enExample)
JP (1) JP5784731B2 (enExample)
KR (1) KR101629891B1 (enExample)
CN (1) CN103098546B (enExample)
CA (1) CA2805945C (enExample)
WO (1) WO2012031110A1 (enExample)

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CN114530117B (zh) * 2021-12-31 2023-09-08 上海矽力杰微电子技术有限公司 多通道led系统、驱动电路及驱动方法
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US20250124884A1 (en) * 2023-10-17 2025-04-17 Synaptics Incorporated Demura tuning for 2d backlight systems

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Also Published As

Publication number Publication date
KR20130098358A (ko) 2013-09-04
US8390205B2 (en) 2013-03-05
WO2012031110A1 (en) 2012-03-08
CN103098546A (zh) 2013-05-08
US20120049745A1 (en) 2012-03-01
JP5784731B2 (ja) 2015-09-24
KR101629891B1 (ko) 2016-06-13
JP2013539183A (ja) 2013-10-17
EP2612541B1 (en) 2018-01-17
EP2612541A1 (en) 2013-07-10
CA2805945A1 (en) 2012-03-08
CN103098546B (zh) 2016-08-17

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Effective date: 20130711

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Effective date: 20190903