DE50101176D1 - Power supply for LEDs for lighting purposes - Google Patents

Power supply for LEDs for lighting purposes

Info

Publication number
DE50101176D1
DE50101176D1 DE50101176T DE50101176T DE50101176D1 DE 50101176 D1 DE50101176 D1 DE 50101176D1 DE 50101176 T DE50101176 T DE 50101176T DE 50101176 T DE50101176 T DE 50101176T DE 50101176 D1 DE50101176 D1 DE 50101176D1
Authority
DE
Germany
Prior art keywords
voltage
transistor
led
connection
output
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
DE50101176T
Other languages
German (de)
Inventor
Reinhard Boeckle
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.)
Tridonic GmbH and Co KG
Original Assignee
Tridonicatco GmbH and Co KG
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 Tridonicatco GmbH and Co KG filed Critical Tridonicatco GmbH and Co KG
Priority to DE50101176T priority Critical patent/DE50101176D1/en
Application granted granted Critical
Publication of DE50101176D1 publication Critical patent/DE50101176D1/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]
    • H05B45/20—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]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits

Abstract

The voltage supply has a constant current source with a transistor with control and output connections. A LED or LED arrangement is connected in series with an output connection. A control loop detects the voltage drop between the transistor output connections and/or between the output connection connected to the LED and the control connection and sets the supply voltage so the voltage drop corresponds to a value above the saturation voltage. The voltage supply has a constant current source (2) to which a supply voltage is applied and that contains a transistor (3) with a control connection and two output connections, whereby the light emitting diode (5) or LED arrangement is connected in series with a transistor output connection. A control loop (6) detects the voltage drop between the transistor output connections and/or between the output connection connected to the LED and the control connection and sets the supply voltage so that the voltage drop corresponds to a value above the transistor saturation voltage. Independent claims are also included for the following: an arrangement of light emitting diodes and a method of supplying voltage to a constant current source for at least one light emitting diode.
DE50101176T 2000-03-17 2001-03-16 Power supply for LEDs for lighting purposes Expired - Lifetime DE50101176D1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE50101176T DE50101176D1 (en) 2000-03-17 2001-03-16 Power supply for LEDs for lighting purposes

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10013216A DE10013216A1 (en) 2000-03-17 2000-03-17 Voltage supply for LEDs for illumination purposes has control loop that sets supply voltage so that voltage drop between transistor outputs corresponds to value above saturation voltage
DE50101176T DE50101176D1 (en) 2000-03-17 2001-03-16 Power supply for LEDs for lighting purposes

Publications (1)

Publication Number Publication Date
DE50101176D1 true DE50101176D1 (en) 2004-01-29

Family

ID=7635242

Family Applications (2)

Application Number Title Priority Date Filing Date
DE10013216A Withdrawn DE10013216A1 (en) 2000-03-17 2000-03-17 Voltage supply for LEDs for illumination purposes has control loop that sets supply voltage so that voltage drop between transistor outputs corresponds to value above saturation voltage
DE50101176T Expired - Lifetime DE50101176D1 (en) 2000-03-17 2001-03-16 Power supply for LEDs for lighting purposes

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE10013216A Withdrawn DE10013216A1 (en) 2000-03-17 2000-03-17 Voltage supply for LEDs for illumination purposes has control loop that sets supply voltage so that voltage drop between transistor outputs corresponds to value above saturation voltage

Country Status (3)

Country Link
EP (1) EP1185147B1 (en)
AT (1) ATE256962T1 (en)
DE (2) DE10013216A1 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4177022B2 (en) * 2002-05-07 2008-11-05 ローム株式会社 LIGHT EMITTING ELEMENT DRIVE DEVICE AND ELECTRONIC DEVICE HAVING LIGHT EMITTING ELEMENT
US6690146B2 (en) * 2002-06-20 2004-02-10 Fairchild Semiconductor Corporation High efficiency LED driver
DE102004050655A1 (en) 2004-10-18 2006-06-01 Volkswagen Ag A vehicle lighting device and method for controlling a vehicle lighting device
DE102005012663B4 (en) 2005-03-18 2018-08-23 Austriamicrosystems Ag Arrangement with a voltage converter for supplying power to an electrical load and method for adjusting the arrangement with voltage converter
US20080297059A1 (en) * 2005-12-29 2008-12-04 Micha Nisani Led Control Circuit and Method
DE102006000810B4 (en) * 2006-01-03 2007-10-04 Vossloh-Schwabe Optoelectronic Gmbh & Co. Kg Interconnected arrangement of at least one LED chip having individual modules
KR20070093736A (en) * 2006-03-15 2007-09-19 삼성전자주식회사 Light emitting apparatus and control method thereof
KR100737867B1 (en) 2006-06-02 2007-07-12 삼성전자주식회사 Apparatus lighting led and method thereof
EP2123127A1 (en) 2006-12-06 2009-11-25 Nxp B.V. Controlled voltage source for led drivers
EP2197244B1 (en) * 2008-12-12 2011-08-03 austriamicrosystems AG Current source and current source arrangement
ATE554435T1 (en) 2009-02-12 2012-05-15 Austriamicrosystems Ag CIRCUIT CHARGING PUMP ARRANGEMENT AND METHOD FOR PROVIDING A REGULATED CURRENT
DE102014202363A1 (en) * 2014-02-10 2015-08-13 Tridonic Gmbh & Co Kg Voltage converter for the operation of bulbs

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63305837A (en) * 1987-06-05 1988-12-13 Katsuyuki Miyasaka Electronic apparatus
JP2706740B2 (en) * 1990-05-16 1998-01-28 セイコーインスツルメンツ株式会社 Voltage regulator
JPH11214183A (en) * 1998-01-22 1999-08-06 Hochiki Corp Light emitting circuit
US5929617A (en) * 1998-03-03 1999-07-27 Analog Devices, Inc. LDO regulator dropout drive reduction circuit and method
DE19814745A1 (en) * 1998-04-02 1999-10-07 Apag Elektronik Ag Circuit for LED light fitting with several LED's connected in series with supply voltage

Also Published As

Publication number Publication date
DE10013216A1 (en) 2001-09-20
ATE256962T1 (en) 2004-01-15
EP1185147B1 (en) 2003-12-17
EP1185147A1 (en) 2002-03-06

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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: TRIDONIC GMBH & CO KG, DORNBIRN, AT