EP1528841A3 - Lighting control - Google Patents

Lighting control Download PDF

Info

Publication number
EP1528841A3
EP1528841A3 EP04256681A EP04256681A EP1528841A3 EP 1528841 A3 EP1528841 A3 EP 1528841A3 EP 04256681 A EP04256681 A EP 04256681A EP 04256681 A EP04256681 A EP 04256681A EP 1528841 A3 EP1528841 A3 EP 1528841A3
Authority
EP
European Patent Office
Prior art keywords
input signal
illumination level
lighting control
perceived illumination
lighting system
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.)
Withdrawn
Application number
EP04256681A
Other languages
German (de)
French (fr)
Other versions
EP1528841A2 (en
Inventor
J. Michael c/o Anytronics Limited Crawford
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.)
Anytronics Ltd
Original Assignee
Anytronics Ltd
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 Anytronics Ltd filed Critical Anytronics Ltd
Publication of EP1528841A2 publication Critical patent/EP1528841A2/en
Publication of EP1528841A3 publication Critical patent/EP1528841A3/en
Withdrawn legal-status Critical Current

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

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

A lighting system is controlled by lighting control apparatus 40 dependent on a received input signal 41 representing a required perceived illumination level. The lighting control apparatus comprising a sigma-delta converter having an input filter 47 for providing a filtered input signal 411 from the input signal 41 to a precision comparator 44 for comparing the filtered input signal with a feedback input signal 451 from a system model module 45 simulating an effect of the input signal on the lighting system. A resultant perceived illumination level is compared with the required perceived illumination level, and the precision comparator provides an output signal 42 for controlling a power supply 43 to the lighting system 46 to provide the required perceived illumination level.
EP04256681A 2003-10-31 2004-10-28 Lighting control Withdrawn EP1528841A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0325514A GB2407654B (en) 2003-10-31 2003-10-31 Lighting control
GB0325514 2003-10-31

Publications (2)

Publication Number Publication Date
EP1528841A2 EP1528841A2 (en) 2005-05-04
EP1528841A3 true EP1528841A3 (en) 2005-07-06

Family

ID=29725770

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04256681A Withdrawn EP1528841A3 (en) 2003-10-31 2004-10-28 Lighting control

Country Status (2)

Country Link
EP (1) EP1528841A3 (en)
GB (1) GB2407654B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8941694B2 (en) 2007-10-05 2015-01-27 Cambridge Display Technology Limited Method of driving an electro-optic display utilizing internal capacitance to smooth a digitally modulated signal

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1916878B1 (en) * 2006-10-27 2011-02-02 Airbus Operations GmbH Light monitoring system and method for operating same
EP2081414A1 (en) * 2008-01-09 2009-07-22 Infineon Technologies Austria AG Sigma delta LED driver
EP2230885B1 (en) 2009-03-12 2010-11-10 Infineon Technologies Austria AG Sigma delta current source and LED driver

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5471052A (en) * 1993-10-25 1995-11-28 Eaton Corporation Color sensor system using a secondary light receiver
WO2001024584A1 (en) * 1999-09-29 2001-04-05 Color Kinetics, Inc. Systems and methods for calibrating light output by light-emitting diodes
US6349023B1 (en) * 2000-02-24 2002-02-19 Robotic Vision Systems, Inc. Power control system for illumination array
US20020047624A1 (en) * 2000-03-27 2002-04-25 Stam Joseph S. Lamp assembly incorporating optical feedback
DE10146094A1 (en) * 2001-09-19 2003-04-03 Bosch Gmbh Robert Illumination arrangement, e.g. for auto radio or navigation system, has control unit that determines control value for voltage supply depending on intensity class of light source or sources
US20030076056A1 (en) * 2001-10-22 2003-04-24 Lumileds Usa Method and apparatus for sensing the color point of an RGB LED white luminary using photodiodes

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6803891B2 (en) * 2000-01-27 2004-10-12 Pioneer Corporation Apparatus for driving light-emitting display
ES2309141T3 (en) * 2002-01-03 2008-12-16 Dialog Semiconductor Gmbh DIGITAL REGULATION OF FLUORESCENT LAMPS.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5471052A (en) * 1993-10-25 1995-11-28 Eaton Corporation Color sensor system using a secondary light receiver
WO2001024584A1 (en) * 1999-09-29 2001-04-05 Color Kinetics, Inc. Systems and methods for calibrating light output by light-emitting diodes
US6349023B1 (en) * 2000-02-24 2002-02-19 Robotic Vision Systems, Inc. Power control system for illumination array
US20020047624A1 (en) * 2000-03-27 2002-04-25 Stam Joseph S. Lamp assembly incorporating optical feedback
DE10146094A1 (en) * 2001-09-19 2003-04-03 Bosch Gmbh Robert Illumination arrangement, e.g. for auto radio or navigation system, has control unit that determines control value for voltage supply depending on intensity class of light source or sources
US20030076056A1 (en) * 2001-10-22 2003-04-24 Lumileds Usa Method and apparatus for sensing the color point of an RGB LED white luminary using photodiodes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SINGH S S ET AL: "A study of sigma-delta modulation control strategies for multi-level voltage source inverters", 7TH. INTERNATIONAL CONFERENCE ON POWER ELECTRONICS AND VARIABLE SPEED DRIVES. PEVD'98. LONDON, SEPT. 21 -23, 1998, IEE CONFERENCE PUBLICATION NO. 456, LONDON : IEE, UK, 21 September 1998 (1998-09-21), pages 347 - 352, XP006504927, ISBN: 0-85296-704-7 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8941694B2 (en) 2007-10-05 2015-01-27 Cambridge Display Technology Limited Method of driving an electro-optic display utilizing internal capacitance to smooth a digitally modulated signal

Also Published As

Publication number Publication date
GB2407654B (en) 2007-08-08
GB0325514D0 (en) 2003-12-03
GB2407654A (en) 2005-05-04
EP1528841A2 (en) 2005-05-04

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