EP1881743A3 - Lighting apparatus - Google Patents

Lighting apparatus Download PDF

Info

Publication number
EP1881743A3
EP1881743A3 EP07013491A EP07013491A EP1881743A3 EP 1881743 A3 EP1881743 A3 EP 1881743A3 EP 07013491 A EP07013491 A EP 07013491A EP 07013491 A EP07013491 A EP 07013491A EP 1881743 A3 EP1881743 A3 EP 1881743A3
Authority
EP
European Patent Office
Prior art keywords
light source
electric power
lighting apparatus
phosphor
increased
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Withdrawn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
EP07013491A
Other languages
German (de)
French (fr)
Other versions
EP1881743A2 (en
Inventor
Shimizu Keiichi
Hashimoto Sumio
Ono Keisuke
Nishiie Mitsuhiko
Moriyama Takayoshi
Hiramatsu Takuro
Nakanishi Akiko
Toda Masahiro
Higuchi Kazunari
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.)
Toshiba Lighting and Technology Corp
Original Assignee
Toshiba Lighting and Technology Corp
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 Toshiba Lighting and Technology Corp filed Critical Toshiba Lighting and Technology Corp
Publication of EP1881743A2 publication Critical patent/EP1881743A2/en
Publication of EP1881743A3 publication Critical patent/EP1881743A3/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Withdrawn legal-status Critical Current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]
    • H05B45/10—Controlling the intensity of the light
    • H05B45/18—Controlling the intensity of the light using temperature 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]
    • H05B45/30—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]
    • H05B45/40—Details of LED load circuits
    • 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

Landscapes

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

Abstract

A lighting apparatus is provided, which has a not lowered light output and a long life even service time is prolonged. The lighting apparatus includes a light source having a phosphor and a resin including the phosphor, and having a characteristic that as a provided electric power is increased, a decreased rate of a lumen maintenance factor is increased, and an electric-to-optical conversion efficiency is reduced; a radiation element, directly or indirectly disposed on the light source; a power source, capable of changing the electric power supplied to the light source; and a controller, reducing the electric power provided to the light source at an initial period, and making the provided electric power increase as a function of time.
EP07013491A 2006-07-10 2007-07-10 Lighting apparatus Withdrawn EP1881743A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006189881 2006-07-10

Publications (2)

Publication Number Publication Date
EP1881743A2 EP1881743A2 (en) 2008-01-23
EP1881743A3 true EP1881743A3 (en) 2010-04-28

Family

ID=38573362

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07013491A Withdrawn EP1881743A3 (en) 2006-07-10 2007-07-10 Lighting apparatus

Country Status (3)

Country Link
EP (1) EP1881743A3 (en)
JP (1) JP2013235847A (en)
CN (1) CN101106856B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2461895A (en) * 2008-07-16 2010-01-20 Elliot Makin Light emitting diode driver
KR101849786B1 (en) 2009-03-18 2018-04-17 가부시키가이샤 한도오따이 에네루기 켄큐쇼 Lighting device
DE102010005743A1 (en) * 2009-07-09 2011-01-13 Siteco Beleuchtungstechnik Gmbh LED control
WO2011033432A1 (en) * 2009-09-18 2011-03-24 Koninklijke Philips Electronics N.V. Lighting module
JP5607980B2 (en) * 2010-04-09 2014-10-15 パナソニック株式会社 Lighting device, lamp, lighting circuit device, lighting fixture
US9807825B2 (en) 2010-05-18 2017-10-31 Cree, Inc. Solid state lighting devices utilizing memristors
US8710995B2 (en) 2010-05-20 2014-04-29 Rohm Co., Ltd. Lighting apparatus
WO2015198699A1 (en) * 2014-06-26 2015-12-30 Ｎｅｃライティング株式会社 Organic el panel control device, light source device, organic el panel control method, program, and recording medium
WO2020170421A1 (en) * 2019-02-22 2020-08-27 三菱電機株式会社 Refrigerator

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0952757A2 (en) * 1998-04-25 1999-10-27 Mannesmann VDO Aktiengesellschaft Circuit for controlling the light intensity of current controlled LEDS for display illumination
DE20008346U1 (en) * 2000-05-09 2001-09-20 Sidler GmbH & Co., 72072 Tübingen Electrical arrangement with several electrical components
WO2002015145A2 (en) * 2000-08-17 2002-02-21 Power Signal Technologies, Inc. Solid state light with self diagnostics and predictive failure analysis mechanisms
DE20220356U1 (en) * 2002-06-20 2003-06-05 Insta Elektro GmbH, 58511 Lüdenscheid Lighting unit comprising light emitting diodes, includes microprocessor and circuitry determining intensity from characteristic curve
US20040108982A1 (en) * 2002-12-09 2004-06-10 Lockheed Martin Corporation Method of LED life extension and end-of-life prediction
WO2005030903A1 (en) * 2003-09-24 2005-04-07 Patent-Treuhand- Gesellschaft Für Elektrische Glühlampen Mbh Highly efficient led-based illumination system featuring improved color rendering

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19540326B4 (en) * 1995-10-28 2006-06-14 Automotive Lighting Reutlingen Gmbh Headlights for vehicles
JP4443853B2 (en) * 2002-04-23 2010-03-31 株式会社半導体エネルギー研究所 LIGHT EMITTING DEVICE AND ELECTRONIC DEVICE USING THE SAME
JP2004327823A (en) * 2003-04-25 2004-11-18 Nikon Corp Illuminator, exposure apparatus, and exposure method
JP2005005546A (en) * 2003-06-13 2005-01-06 Hitachi Lighting Ltd Led lighting device
JP4277610B2 (en) * 2003-07-23 2009-06-10 豊田合成株式会社 Light emitting device
US7176635B2 (en) * 2004-02-24 2007-02-13 Musco Corporation Apparatus and method for compensating for reduced light output of a light source having a lumen depreciation characteristic over its operational life
DE102004018343B4 (en) * 2004-04-15 2017-06-14 Zumtobel Lighting Gmbh lighting system
JP4590994B2 (en) * 2004-09-09 2010-12-01 豊田合成株式会社 Light emitting device and manufacturing method thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0952757A2 (en) * 1998-04-25 1999-10-27 Mannesmann VDO Aktiengesellschaft Circuit for controlling the light intensity of current controlled LEDS for display illumination
DE20008346U1 (en) * 2000-05-09 2001-09-20 Sidler GmbH & Co., 72072 Tübingen Electrical arrangement with several electrical components
WO2002015145A2 (en) * 2000-08-17 2002-02-21 Power Signal Technologies, Inc. Solid state light with self diagnostics and predictive failure analysis mechanisms
DE20220356U1 (en) * 2002-06-20 2003-06-05 Insta Elektro GmbH, 58511 Lüdenscheid Lighting unit comprising light emitting diodes, includes microprocessor and circuitry determining intensity from characteristic curve
US20040108982A1 (en) * 2002-12-09 2004-06-10 Lockheed Martin Corporation Method of LED life extension and end-of-life prediction
WO2005030903A1 (en) * 2003-09-24 2005-04-07 Patent-Treuhand- Gesellschaft Für Elektrische Glühlampen Mbh Highly efficient led-based illumination system featuring improved color rendering

Also Published As

Publication number Publication date
CN101106856A (en) 2008-01-16
EP1881743A2 (en) 2008-01-23
CN101106856B (en) 2012-01-25
JP2013235847A (en) 2013-11-21

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