EP2200403A1 - Stromregulierte Lichtemissionsvorrichtung zur Verwendung im Fahrzeug - Google Patents

Stromregulierte Lichtemissionsvorrichtung zur Verwendung im Fahrzeug Download PDF

Info

Publication number: EP2200403A1
Authority: EP; European Patent Office
Prior art keywords: light emitting; switch; connected electrically; unit; current
Prior art date: 2008-10-29
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.): Granted

Application number

EP08167800A

Other languages

English (en)

French (fr)

Other versions

EP2200403B1 (de

Inventor

Kuo-Shien Huang

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.)

Quan Mei Tech Co Ltd

Original Assignee

Quan Mei Tech Co 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.)

2008-10-29

Filing date

2008-10-29

Publication date

2010-06-23

2008-10-29 Application filed by Quan Mei Tech Co Ltd filed Critical Quan Mei Tech Co Ltd

2008-10-29 Priority to DE602008002336T priority Critical patent/DE602008002336D1/de

2008-10-29 Priority to EP08167800A priority patent/EP2200403B1/de

2010-06-23 Publication of EP2200403A1 publication Critical patent/EP2200403A1/de

2010-08-25 Application granted granted Critical

2010-08-25 Publication of EP2200403B1 publication Critical patent/EP2200403B1/de

Status Active legal-status Critical Current

2028-10-29 Anticipated expiration legal-status Critical

Links

Images

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
- 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
- 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
- H05B45/52—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits in a parallel array of LEDs

Definitions

the invention relates to a light emitting device, more particularly to a current-regulated light emitting device for vehicle use.
the voltage regulating unit 65 When the electric power source 61 is unstable such that the drive voltage therefrom fluctuates, the voltage regulating unit 65 will operate to adjust the drive voltage to an appropriate value and to supply a stable current for the light emitting unit 64. In view of the need for continuous operation of the voltage regulating unit 65, the operating temperature thereof will increase, and prolonged operation at high temperatures affects operating stability and service life of the voltage regulating unit 65.
a current-regulated light emitting device for vehicle use of the present invention comprises a light emitting unit and a current limiting unit.
the light emitting device includes at least one light emitting module that has a light emitting component.
the current limiting unit includes a first switch, a first bias unit, a second switch and a second bias unit.
the first switch is adapted for making and breaking an electrical circuit between the light emitting unit and the electric power source.
the first bias unit is connected electrically to the first switch, is adapted to be connected electrically to the electric power source, and causes the first switch to conduct such that the first switch makes the electrical circuit between the light emitting unit and the electric power source when the electric power source provides the drive voltage to the first bias unit, thereby resulting in current flow from the electric power source through the light emitting unit and the first switch to activate the light emitting unit.
the second switch is connected electrically to the first switch.
the second bias unit is connected electrically to the first and second switches, and causes the second switch to conduct when amount of current flowing through the first switch exceeds a predetermined threshold. Conduction of the second switch forces the first switch to turn off so as to break the electrical circuit between the light emitting unit and the electric power source, thereby interrupting the current flow through the light emitting unit.
the light emitting unit 1 is used as a vehicle light for illumination, is adapted for electrical connection to the electric power source 4 and the brake device 5, and includes a plurality of light emitting modules 11 connected in parallel, and three protective components 12.
Each light emitting module 11 includes a first light emitting component (D1), a second light emitting component (D2), and a pair of current limiting resistors (R). It is noted that, in practice, the number of the light emitting components of each light emitting module 11 is not limited to two.
the current limiting resistors (R) of each light emitting module 11 are connected in parallel, and the parallel-connected current limiting resistors (R) are connected in series between the respective first light emitting component (D1) and the protective components 12.
the first switch (Q1) is a n-channel depletion-type metal-oxide-semiconductor field-effect transistor (MOSFET). In practice, other components that can serve the same function may be used.
the first switch (Q1) has a first control end (G), a first input end (D), and a first output end (S).
the first control end (G) is the gate and is connected electrically to the first bias unit.
the first input end (D) is the drain and is connected electrically to the cathodes of the second light emitting components (D2) of the light emitting modules 11 of the light emitting unit 1.
the first output end (S) is the source and is connected electrically to the first resistors (R10) of the second bias unit.
the first switch (Q1) must be capable of bearing a voltage, which has a value larger than the drive voltage (V1), between the first input end (D) and the first output end (S).
the fourth resistor (R4) is connected electrically at one end to the brake device 5 via one of the protective components 12, and is further connected electrically at the other end to the fifth resistor (R5) and the second capacitor (C2).
the fifth resistor (R5) is connected in parallel to the second capacitor (C2), and the fifth resistor (R5) and the second capacitor (C2) are grounded at one end.
the coupling resistors (R6) are connected in parallel, and the parallel-connected coupling resistors (R6) are connected electrically at one end to the first output end (S) and the second control end (B), and are further connected electrically at another end to the third switch (Q3).
the third switch (Q3) is a n-channel depletion-type MOSFET, and has a third control end (G) connected electrically to a junction of the fourth and fifth resistors (R4, R5), a third input end (D) connected electrically to the coupling resistors (R6), and a third output end (S) connected electrically to the second output end (E), which is grounded.
the third control end (G) is the gate, the third input end (D) is the drain, and the third output end (S) is the source of the MOSFET.

Landscapes

Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Circuit Arrangement For Electric Light Sources In General (AREA)

EP08167800A 2008-10-29 2008-10-29 Stromregulierte Lichtemissionsvorrichtung zur Verwendung im Fahrzeug Active EP2200403B1 (de)

Priority Applications (2)

Application Number	Priority Date	Filing Date	Title
DE602008002336T DE602008002336D1 (de)	2008-10-29	2008-10-29	Stromregulierte Lichtemissionsvorrichtung zur Verwendung im Fahrzeug
EP08167800A EP2200403B1 (de)	2008-10-29	2008-10-29	Stromregulierte Lichtemissionsvorrichtung zur Verwendung im Fahrzeug

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
EP08167800A EP2200403B1 (de)	2008-10-29	2008-10-29	Stromregulierte Lichtemissionsvorrichtung zur Verwendung im Fahrzeug

Publications (2)

Publication Number	Publication Date
EP2200403A1 true EP2200403A1 (de)	2010-06-23
EP2200403B1 EP2200403B1 (de)	2010-08-25

Family

ID=40513893

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP08167800A Active EP2200403B1 (de)	2008-10-29	2008-10-29	Stromregulierte Lichtemissionsvorrichtung zur Verwendung im Fahrzeug

Country Status (2)

Country	Link
EP (1)	EP2200403B1 (de)
DE (1)	DE602008002336D1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP2440018A1 (de) *	2010-09-29	2012-04-11	Rohm Co., Ltd.	LED-Ansteuerungsvorrichtung für Automobile

Citations (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US5765940A (en) *	1995-10-31	1998-06-16	Dialight Corporation	LED-illuminated stop/tail lamp assembly
US6414437B1 (en)	1999-09-23	2002-07-02	Reitter & Schefenacker Gmbh & Co. Kg	Apparatus and method for controlling illumination devices of vehicles
WO2004068909A1 (en) *	2003-01-27	2004-08-12	Matsushita Electric Industrial Co., Ltd.	Multichip led lighting device
US20070182337A1 (en) *	2006-02-03	2007-08-09	Honeywell International Inc.	Increasing Reliability of Operation of Light Emitting Diode Arrays at Higher Operating Temperatures and its Use in the Lamps of Automobiles
EP1860922A1 (de)	2006-05-24	2007-11-28	Power Integrations, Inc.	Verfahren und Vorrichtung zur Stromversorgung lichtemittierender Dioden-Arrays

2008
- 2008-10-29 EP EP08167800A patent/EP2200403B1/de active Active
- 2008-10-29 DE DE602008002336T patent/DE602008002336D1/de active Active

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US5765940A (en) *	1995-10-31	1998-06-16	Dialight Corporation	LED-illuminated stop/tail lamp assembly
US6414437B1 (en)	1999-09-23	2002-07-02	Reitter & Schefenacker Gmbh & Co. Kg	Apparatus and method for controlling illumination devices of vehicles
WO2004068909A1 (en) *	2003-01-27	2004-08-12	Matsushita Electric Industrial Co., Ltd.	Multichip led lighting device
US20070182337A1 (en) *	2006-02-03	2007-08-09	Honeywell International Inc.	Increasing Reliability of Operation of Light Emitting Diode Arrays at Higher Operating Temperatures and its Use in the Lamps of Automobiles
EP1860922A1 (de)	2006-05-24	2007-11-28	Power Integrations, Inc.	Verfahren und Vorrichtung zur Stromversorgung lichtemittierender Dioden-Arrays

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP2440018A1 (de) *	2010-09-29	2012-04-11	Rohm Co., Ltd.	LED-Ansteuerungsvorrichtung für Automobile
US8754592B2 (en)	2010-09-29	2014-06-17	Rohm Co., Ltd.	Automobile LED driving device
US9148915B2 (en)	2010-09-29	2015-09-29	Rohm Co., Ltd.	Automobile LED driving device
EP3626536A1 (de) *	2010-09-29	2020-03-25	Rohm Co., Ltd.	Led-ansteuerungsvorrichtung für automobile
EP3741622A1 (de) *	2010-09-29	2020-11-25	Rohm Co., Ltd.	Led-ansteuerungsvorrichtung für automobile
EP4046870A1 (de) *	2010-09-29	2022-08-24	Rohm Co., Ltd.	Led-ansteuerungsvorrichtung für automobile

Also Published As

Publication number	Publication date
DE602008002336D1 (de)	2010-10-07
EP2200403B1 (de)	2010-08-25

Legal Events

Date	Code	Title	Description
2009-12-21	GRAP	Despatch of communication of intention to grant a patent	Free format text: ORIGINAL CODE: EPIDOSNIGR1
2010-05-07	GRAS	Grant fee paid	Free format text: ORIGINAL CODE: EPIDOSNIGR3
2010-05-21	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
2010-06-23	17P	Request for examination filed	Effective date: 20081029
2010-06-23	AK	Designated contracting states	Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
2010-07-23	GRAA	(expected) grant	Free format text: ORIGINAL CODE: 0009210
2010-08-25	AK	Designated contracting states	Kind code of ref document: B1 Designated state(s): DE ES FR GB
2010-08-25	REG	Reference to a national code	Ref country code: GB Ref legal event code: FG4D
2010-10-07	REF	Corresponds to:	Ref document number: 602008002336 Country of ref document: DE Date of ref document: 20101007 Kind code of ref document: P
2011-03-02	AKX	Designation fees paid	Designated state(s): DE ES FR GB
2011-06-30	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20101206
2011-06-30	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: ES Payment date: 20101025 Year of fee payment: 3
2011-07-01	PLBE	No opposition filed within time limit	Free format text: ORIGINAL CODE: 0009261
2011-07-01	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT
2011-08-03	26N	No opposition filed	Effective date: 20110526
2011-09-15	REG	Reference to a national code	Ref country code: DE Ref legal event code: R097 Ref document number: 602008002336 Country of ref document: DE Effective date: 20110526
2015-10-26	REG	Reference to a national code	Ref country code: FR Ref legal event code: PLFP Year of fee payment: 8
2016-07-18	REG	Reference to a national code	Ref country code: FR Ref legal event code: PLFP Year of fee payment: 9
2017-09-05	REG	Reference to a national code	Ref country code: FR Ref legal event code: PLFP Year of fee payment: 10
2018-06-25	REG	Reference to a national code	Ref country code: FR Ref legal event code: PLFP Year of fee payment: 11
2019-11-25	REG	Reference to a national code	Ref country code: DE Ref legal event code: R079 Ref document number: 602008002336 Country of ref document: DE Free format text: PREVIOUS MAIN CLASS: H05B0033080000 Ipc: H05B0045000000
2023-07-26	P01	Opt-out of the competence of the unified patent court (upc) registered	Effective date: 20230616
2025-10-16	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: GB Payment date: 20250923 Year of fee payment: 18
2025-10-20	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: FR Payment date: 20250923 Year of fee payment: 18
2026-01-08	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: DE Payment date: 20250918 Year of fee payment: 18

Publication	Publication Date	Title
US8198834B2 (en)	2012-06-12	LED drive circuit
US7994725B2 (en)	2011-08-09	Floating switch controlling LED array segment
EP2269421B1 (de)	2012-06-13	Eingabekanalerkennungsvorrichtung mit geringem verlust für ein direktstromgetriebenes beleuchtungssystem
CN102132479A (zh)	2011-07-20	电源装置和照明装置
US7952290B2 (en)	2011-05-31	Current-regulated light emitting device for vehicle use
CN104703337B (zh)	2017-12-26	车辆用灯具
US8421374B2 (en)	2013-04-16	Apparatus for driving load
EP2474988A1 (de)	2012-07-11	Lichtemittierende Diodenantriebssteuerungsschaltung
CN108235506B (zh)	2021-11-09	用于车灯组件的恒定电流功率驱动器电路
US7728532B2 (en)	2010-06-01	Circuit device for light-emitting diode driving and stabilizing system
JP4944553B2 (ja)	2012-06-06	照明装置
EP2200403A1 (de)	2010-06-23	Stromregulierte Lichtemissionsvorrichtung zur Verwendung im Fahrzeug
JP2014151717A (ja)	2014-08-25	車両用灯具用の過電圧保護装置
AU2008217015B2 (en)	2011-04-14	Current-regulated light emitting device for vehicle use
US9282619B2 (en)	2016-03-08	Light device for a ceiling fan, switch device of the same, and method for preventing abnormal operation of the light device using the switch device
JP4955502B2 (ja)	2012-06-20	光源点灯用回路およびそれを備えた発光装置
JP2015153473A (ja)	2015-08-24	点灯装置および照明器具
CN113573944A (zh)	2021-10-29	车辆用灯具及点亮电路
CN104067696B (zh)	2016-08-24	Led点亮装置
KR101512727B1 (ko)	2015-05-04	발광다이오드 구동 회로
CN105960058B (zh)	2019-01-01	发光二极管调光开关保护电路
KR20160066887A (ko)	2016-06-13	잔광현상 방지기능이 구비된 led조명 전원공급회로
JP7393414B2 (ja)	2023-12-06	車両用灯具および点灯回路
US20200092969A1 (en)	2020-03-19	Vehicle lighting device
JP4677859B2 (ja)	2011-04-27	Ｌｅｄ照明装置