DE602005009317D1 - Circuit and method for monitoring the temperature of a light emitting diode - Google Patents
Circuit and method for monitoring the temperature of a light emitting diodeInfo
- Publication number
- DE602005009317D1 DE602005009317D1 DE602005009317T DE602005009317T DE602005009317D1 DE 602005009317 D1 DE602005009317 D1 DE 602005009317D1 DE 602005009317 T DE602005009317 T DE 602005009317T DE 602005009317 T DE602005009317 T DE 602005009317T DE 602005009317 D1 DE602005009317 D1 DE 602005009317D1
- Authority
- DE
- Germany
- Prior art keywords
- light emitting
- emitting diode
- temperature
- constant
- monitoring
- 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
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]
- H05B45/10—Controlling the intensity of the light
- H05B45/12—Controlling the intensity 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]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
- H05B45/56—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits involving measures to prevent abnormal temperature of the 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]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/38—Switched mode power supply [SMPS] using boost topology
Landscapes
- Led Devices (AREA)
Abstract
The present invention discloses an electric circuit 1 and method for monitoring a temperature of a light emitting diode 2. The inventive electric circuit 1 for monitoring a temperature of a light emitting diode 2 in a constant-current mode comprises a driver circuit 3 for supplying a predefined constant-current to the light emitting diode 2 to run the light emitting diode 2 in said constant-current mode, a storage 4 for storing a general dependency between a forward voltage of the light emitting diode 2 in said constant-current mode and the temperature of the light emitting diode 2, a voltage sensor 5 for measuring the actual forward voltage of the light emitting diode 2 in said constant-current mode and a calculator 6 for calculating the actual temperature of the light emitting diode 2 by using the detected general dependency and the measured actual forward voltage.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05005054A EP1701589B1 (en) | 2005-03-08 | 2005-03-08 | Electric circuit and method for monitoring a temperature of a light emitting diode |
Publications (1)
Publication Number | Publication Date |
---|---|
DE602005009317D1 true DE602005009317D1 (en) | 2008-10-09 |
Family
ID=34934130
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE602005009317T Expired - Fee Related DE602005009317D1 (en) | 2005-03-08 | 2005-03-08 | Circuit and method for monitoring the temperature of a light emitting diode |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1701589B1 (en) |
AT (1) | ATE406783T1 (en) |
DE (1) | DE602005009317D1 (en) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006033233A1 (en) * | 2006-07-18 | 2008-01-24 | Austriamicrosystems Ag | Light emitting diode operating method involves determining temperature of diode representing temperature signal by measuring and evaluating flux voltage of diode in activated operating condition for lighting or signaling purposes |
US8258707B2 (en) | 2007-04-20 | 2012-09-04 | Koninklijke Philips Electronics N.V. | Lighting device with a LED used for sensing |
US7822086B2 (en) * | 2007-07-27 | 2010-10-26 | Microvision, Inc. | Laser projection temperature compensation |
US9326346B2 (en) | 2009-01-13 | 2016-04-26 | Terralux, Inc. | Method and device for remote sensing and control of LED lights |
US8358085B2 (en) * | 2009-01-13 | 2013-01-22 | Terralux, Inc. | Method and device for remote sensing and control of LED lights |
US9668306B2 (en) | 2009-11-17 | 2017-05-30 | Terralux, Inc. | LED thermal management |
JP2013543216A (en) | 2010-09-16 | 2013-11-28 | テララックス, インコーポレイテッド | Communicating with lighting unit via power bus |
US9596738B2 (en) | 2010-09-16 | 2017-03-14 | Terralux, Inc. | Communication with lighting units over a power bus |
US8896231B2 (en) | 2011-12-16 | 2014-11-25 | Terralux, Inc. | Systems and methods of applying bleed circuits in LED lamps |
US8664865B2 (en) * | 2012-03-27 | 2014-03-04 | General Electric Company | Lighting system having an OLED light sensor |
US9265119B2 (en) | 2013-06-17 | 2016-02-16 | Terralux, Inc. | Systems and methods for providing thermal fold-back to LED lights |
CN105701940B (en) * | 2016-04-25 | 2017-11-21 | 成都益英光电科技有限公司 | The survey thing system and its method of discrimination of movement direction of object can be differentiated |
CN105844826B (en) * | 2016-04-25 | 2017-11-21 | 成都益英光电科技有限公司 | Utilize the survey thing system and its detection method of LED lighting body |
CN105701938B (en) * | 2016-04-25 | 2018-01-02 | 成都益英光电科技有限公司 | The survey thing direction-finding system and its detection method of multiple diode illuminator |
US11064582B1 (en) | 2017-07-21 | 2021-07-13 | Lumileds Llc | Method of controlling a segmented flash system |
JP7440287B2 (en) * | 2020-02-05 | 2024-02-28 | アズビル株式会社 | measuring device |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL8200517A (en) * | 1982-02-11 | 1983-09-01 | Tno | ADJUSTING CIRCUIT FOR LIGHT EMITTING DIODE WITH TEMPERATURE COMPENSATION. |
JPH01257383A (en) * | 1988-03-01 | 1989-10-13 | Matsushita Electric Ind Co Ltd | Semiconductor laser driving circuit |
GB2224374A (en) * | 1988-08-24 | 1990-05-02 | Plessey Co Plc | Temperature control of light-emitting devices |
JPH0689453A (en) * | 1992-09-09 | 1994-03-29 | Sony Corp | Optical disk recording device |
GB2288907A (en) * | 1994-04-27 | 1995-11-01 | Thomson Consumer Electronics | Combined light emitting diode and photodiode |
JPH08128953A (en) * | 1994-10-28 | 1996-05-21 | Shimadzu Corp | Oil deterioration degree detecting device |
US20040052076A1 (en) * | 1997-08-26 | 2004-03-18 | Mueller George G. | Controlled lighting methods and apparatus |
JP3960630B2 (en) * | 1998-02-06 | 2007-08-15 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Organic electroluminescence device |
DE19912463A1 (en) * | 1999-03-19 | 2000-09-28 | Sensor Line Ges Fuer Optoelekt | Process for stabilizing the optical output power of light-emitting diodes and laser diodes |
DE19917239A1 (en) * | 1999-04-16 | 2000-10-26 | Hella Kg Hueck & Co | Method for determining correction factors to compensate for the temperature drift of the beam intensity of an LED |
US6724158B1 (en) * | 2002-10-28 | 2004-04-20 | Honeywell International Inc. | Power linearization technique for controlling the luminance of light emitting display devices |
-
2005
- 2005-03-08 AT AT05005054T patent/ATE406783T1/en not_active IP Right Cessation
- 2005-03-08 DE DE602005009317T patent/DE602005009317D1/en not_active Expired - Fee Related
- 2005-03-08 EP EP05005054A patent/EP1701589B1/en not_active Not-in-force
Also Published As
Publication number | Publication date |
---|---|
ATE406783T1 (en) | 2008-09-15 |
EP1701589B1 (en) | 2008-08-27 |
EP1701589A1 (en) | 2006-09-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |