DE59910096D1 - Circuit arrangement for adjusting the brightness of current-controlled light-emitting diodes for illuminating a display - Google Patents

Circuit arrangement for adjusting the brightness of current-controlled light-emitting diodes for illuminating a display

Info

Publication number
DE59910096D1
DE59910096D1 DE59910096T DE59910096T DE59910096D1 DE 59910096 D1 DE59910096 D1 DE 59910096D1 DE 59910096 T DE59910096 T DE 59910096T DE 59910096 T DE59910096 T DE 59910096T DE 59910096 D1 DE59910096 D1 DE 59910096D1
Authority
DE
Germany
Prior art keywords
illuminating
brightness
adjusting
display
current
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 - Lifetime
Application number
DE59910096T
Other languages
German (de)
Inventor
Dieter Dipl-Ing F Klostermeier
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.)
Continental Automotive GmbH
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Application granted granted Critical
Publication of DE59910096D1 publication Critical patent/DE59910096D1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • H05B45/58—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits involving end of life detection of LEDs
    • 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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/20—Responsive to malfunctions or to light source life; for protection
    • 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
    • H05B47/20—Responsive to malfunctions or to light source life; for protection
    • H05B47/28—Circuit arrangements for protecting against abnormal temperature
DE59910096T 1998-04-25 1999-04-14 Circuit arrangement for adjusting the brightness of current-controlled light-emitting diodes for illuminating a display Expired - Lifetime DE59910096D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19818621A DE19818621A1 (en) 1998-04-25 1998-04-25 Circuit arrangement for adjusting the brightness of current-controlled light-emitting diodes for illuminating a display

Publications (1)

Publication Number Publication Date
DE59910096D1 true DE59910096D1 (en) 2004-09-09

Family

ID=7865835

Family Applications (2)

Application Number Title Priority Date Filing Date
DE19818621A Ceased DE19818621A1 (en) 1998-04-25 1998-04-25 Circuit arrangement for adjusting the brightness of current-controlled light-emitting diodes for illuminating a display
DE59910096T Expired - Lifetime DE59910096D1 (en) 1998-04-25 1999-04-14 Circuit arrangement for adjusting the brightness of current-controlled light-emitting diodes for illuminating a display

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE19818621A Ceased DE19818621A1 (en) 1998-04-25 1998-04-25 Circuit arrangement for adjusting the brightness of current-controlled light-emitting diodes for illuminating a display

Country Status (2)

Country Link
EP (1) EP0952757B1 (en)
DE (2) DE19818621A1 (en)

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JP4422832B2 (en) * 1999-11-05 2010-02-24 アビックス株式会社 LED light
US6333602B1 (en) * 1999-12-14 2001-12-25 Exfo Photonic Solutions Inc. Smart light source with integrated operational parameters data storage capability
WO2002035894A1 (en) * 2000-10-27 2002-05-02 Koninklijke Philips Electronics N.V. Circuit arrangement
US6441558B1 (en) * 2000-12-07 2002-08-27 Koninklijke Philips Electronics N.V. White LED luminary light control system
DE10113248A1 (en) * 2001-03-19 2002-10-02 Able Design Ges Fuer Entwicklu Compensation of burn-in of a plasma monitor either for television or computer use by determination of the degree of loss of brightness on a pixel by pixel basis and use of such stored values for individual pixel compensation
DE10146191A1 (en) * 2001-09-17 2003-04-10 Ackermann Albert Gmbh Co Process for illuminant monitoring of nurse call systems and nurse call system
DE10160667A1 (en) * 2001-12-11 2003-06-26 Cherry Gmbh Drive method for electroluminescent element, by varying time intervals between application of control signals so that brightness remains constant over lifetime of element
US7425798B2 (en) * 2003-01-23 2008-09-16 Lumination Llc Intelligent light degradation sensing LED traffic signal
US7132805B2 (en) * 2004-08-09 2006-11-07 Dialight Corporation Intelligent drive circuit for a light emitting diode (LED) light engine
DE102005018175A1 (en) * 2005-04-19 2006-10-26 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH LED module and LED lighting device with several LED modules
FR2900304B1 (en) * 2006-04-20 2012-03-02 Valeo Vision LED CONTROL DEVICE FOR A VEHICLE FIRE
CN101106856B (en) * 2006-07-10 2012-01-25 东芝照明技术株式会社 Lighting apparatus
DE102006054512B4 (en) * 2006-11-20 2016-01-14 Zumtobel Lighting Gmbh Method for operating a light source and lamp operating device therefor
DE102007024078A1 (en) * 2007-03-23 2008-10-02 Visteon Global Technologies, Inc., Van Buren Township Control unit for light source of illuminated display or operating element, has power electronics formed for controlling light source by pulse width modulated signal and programmable micro controller
DE102007031801A1 (en) * 2007-07-07 2009-01-08 Bayerische Motoren Werke Aktiengesellschaft Automotive lighting system
CA2699720A1 (en) * 2007-09-17 2009-03-26 Wissenlux S.R.L. Led illuminating device
DE102009014998A1 (en) 2009-03-26 2010-09-30 Tridonicatco Gmbh & Co. Kg Dimmable control gear and lighting system to increase the life expectancy of LEDs and OLEDs
DE102009054067A1 (en) * 2009-11-20 2011-05-26 Osram Opto Semiconductors Gmbh Light emitting device
JP5720882B2 (en) * 2011-01-31 2015-05-20 東芝ライテック株式会社 Lighting device and lighting device
US9524641B2 (en) * 2011-03-22 2016-12-20 GE Lighting Solutions, LLC LED traffic signal fault logging system and method
DE102011006696A1 (en) * 2011-04-04 2012-10-04 Zf Friedrichshafen Ag Power electronics assembly, particularly for drive system of motor vehicle, has power electronics and monitoring device for operating time of power electronics
DE102011016360B4 (en) * 2011-04-07 2019-10-02 Infineon Technologies Ag Vehicle lighting arrangement, light-emitting circuit driver and method for providing information for determining a lighting condition
DE102011084951A1 (en) * 2011-10-21 2013-04-25 Zumtobel Lighting Gmbh LED light with adjustable brightness
DE102016104493A1 (en) 2016-03-11 2017-09-14 Itz Innovations- Und Technologiezentrum Gmbh Method for operating a lamp
WO2017192566A1 (en) * 2016-05-02 2017-11-09 Growflux Llc System and method for advanced horticultural lighting
DE102016213192A1 (en) * 2016-07-19 2018-01-25 BSH Hausgeräte GmbH Reduction of brightness differences in the operation of a lighting device of a household appliance with multiple bulbs
DE102017206818A1 (en) 2017-04-24 2018-10-25 Volkswagen Aktiengesellschaft Speed step display Ausleuchteinheit
DE102018100598A1 (en) * 2018-01-12 2019-07-18 Osram Opto Semiconductors Gmbh METHOD FOR CONTROLLING A POWER OF AN ILLUMINATED DIODE

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0287360B1 (en) * 1987-04-13 1993-03-17 Sharp Kabushiki Kaisha An apparatus for driving a semiconductor laser device
US5019769A (en) * 1990-09-14 1991-05-28 Finisar Corporation Semiconductor laser diode controller and laser diode biasing control method
JP2546080B2 (en) * 1991-05-10 1996-10-23 富士通株式会社 Semiconductor laser control device
US5719675A (en) * 1992-06-16 1998-02-17 Honeywell Inc. Laser gyro life prediction
FR2694423B1 (en) * 1992-07-30 1994-12-23 France Telecom Device for controlling the output power of laser diodes.
JPH0830231A (en) * 1994-07-18 1996-02-02 Toshiba Corp Led dot matrix display device and method for dimming thereof
DE19540326B4 (en) * 1995-10-28 2006-06-14 Automotive Lighting Reutlingen Gmbh Headlights for vehicles
DE19602891A1 (en) * 1996-01-27 1997-08-07 Kammerer Gmbh M Method and arrangement for adjusting the brightness of a current- or voltage-controlled illuminant for backlighting a display, in particular for motor vehicles

Also Published As

Publication number Publication date
EP0952757A2 (en) 1999-10-27
EP0952757A3 (en) 2001-03-07
EP0952757B1 (en) 2004-08-04
DE19818621A1 (en) 1999-10-28

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: CONTINENTAL AUTOMOTIVE GMBH, 30165 HANNOVER, DE