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EP1289341B1 - Luminaire automobile avec circuit et plaque conductrice associés - Google Patents

Luminaire automobile avec circuit et plaque conductrice associés Download PDF

Info

Publication number
EP1289341B1
EP1289341B1 EP02016583.3A EP02016583A EP1289341B1 EP 1289341 B1 EP1289341 B1 EP 1289341B1 EP 02016583 A EP02016583 A EP 02016583A EP 1289341 B1 EP1289341 B1 EP 1289341B1
Authority
EP
European Patent Office
Prior art keywords
circuit board
circuit
printed circuit
diode
arms
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
EP02016583.3A
Other languages
German (de)
English (en)
Other versions
EP1289341A2 (fr
EP1289341A3 (fr
Inventor
Joachim Brune
Frank Vormbaum
Ludwig Schulze Gronover
Patrick Mehlhorn
Achim Schulte
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.)
Hella GmbH and Co KGaA
Original Assignee
Hella GmbH and Co KGaA
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 Hella GmbH and Co KGaA filed Critical Hella GmbH and Co KGaA
Publication of EP1289341A2 publication Critical patent/EP1289341A2/fr
Publication of EP1289341A3 publication Critical patent/EP1289341A3/fr
Application granted granted Critical
Publication of EP1289341B1 publication Critical patent/EP1289341B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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]

Definitions

  • the present invention relates to a vehicle lamp and a circuit board for a motor vehicle lamp.
  • the circuit board has the features of the preamble of claim 1. Circuit arrangements are usually arranged on such printed circuit boards, wherein the printed circuit boards form the automotive lamp with a lower housing part and an at least partially transparent upper housing part.
  • the diode switching is necessary to prevent voltage spikes that could destroy the light emitting diodes.
  • diode circuits are often provided, so that the light can be connected to the external voltage of the electrical system (12 V or 24 V DC), regardless of the polarity of the light-emitting diodes.
  • the rectified voltage is then tapped at the outputs of the diode circuit and supplied to the resistance circuit. Since the operating voltage of the LEDs, even if several are connected in series, is usually much lower than the voltage of the electrical system of a motor vehicle, the LEDs are connected in series with resistors of the resistance circuit, so as to divide the voltage between the resistors of the resistance circuit and the light-emitting diodes (voltage divider).
  • Such circuits, printed circuit boards with such circuits and lights are well known in the art, for example, from Fig. 5 of the patent US 5 038 255 ,
  • circuit arrangements are often used in the automotive sector as tail lights, brake lights or indicators.
  • the use of the circuit arrangement and the printed circuit boards with such a circuit arrangement is not limited to the examples mentioned.
  • a problem with the known automotive lamps arises when a printed circuit board is exposed to the circuitry the influence of moisture or even moisture. This may be the case if the housing of the lamp due to Damage or aging shows leaks through which precipitation moisture or water splashes into the luminaire. Often with the moisture impurities such as dirt or salts penetrate into the lamp. In such cases, electrochemical corrosion and electrolysis may cause creepage distances on the circuit board. Furthermore, conductive slurries can form which bridge small potential gaps on the printed circuit board, for example between contacts and components. If the luminaire is flooded with a saline solution, outgassing, sparks and electric arcs may be visible, which in rare cases may result in the luminaire burning off.
  • the invention is therefore based on the object, the circuit board and the lamp itself to construct such that the risk of creepage distances is largely excluded.
  • the resistance circuit serves, as already described, to divide the voltage of the vehicle electrical system so that only the operating voltage of the light-emitting diodes drops off, while the remaining voltage in the resistance circuit is converted into heat.
  • the resistors of the resistance circuit and the LEDs thus form a voltage divider.
  • the resistors of the resistance circuit are connected directly one behind the other.
  • the resistors are divided between the two branches of the resistance circuit, so that the resistors are arranged in the direction of the current flow in front of and behind the light-emitting diodes.
  • each of the branches can have at least two resistors connected in parallel.
  • the electrical circuit board may comprise a rectifier bridge circuit as a diode circuit. This makes it possible to connect the circuit arrangement regardless of the polarity of the electrical system.
  • the printed circuit board according to the invention preferably has the supply connections on the upper side of the printed circuit board.
  • the areas are arranged according to the invention in diagonally opposite areas.
  • the branches of the resistance circuit may also be arranged in opposite regions. Also, the areas with the branches of the resistance circuit may be diagonally opposite.
  • the circuit board between the respective areas with the supply terminals and / or the branches of the resistance circuit one or more times provided with slots. These slots prevent leakage paths from forming on top of the PCB.
  • Such a printed circuit board can be used in a luminaire with a lower housing part, an at least partially transparent upper housing part.
  • the upper housing part and / or the lower housing part can then according to the invention have webs which rest on the surface of the printed circuit board or engage in the slots of the printed circuit board. The resting on the surface of the circuit board or engaging in the slots webs prevent moisture transport within the lamp, in which they at least partially seal off areas of the lamp against each other.
  • the circuit arrangement according to the invention has a resistance circuit 1 made up of resistors 11, 12, 13, 14. Between the two inputs 15, and 16, which at the same time also form the supply terminals of the circuit arrangement, and the two outputs 25, 26 of the resistance circuit 1, a parallel connection of two resistors is provided. Between the input 15 and the output 25, the resistors 11, 12 are arranged in parallel, while the resistors 13, 14 are connected in parallel between the input 16 and the output 26.
  • the outputs 15, 16 of the resistance circuit 1 also form inputs of a diode circuit 2 of diodes 21, 22, 23, 24 wherein the diodes 21, 22, 23, 24 are arranged in a rectifier bridge circuit. Outputs of the rectifier bridge circuit at the same time form the outputs 35, 36 of the diode circuit.
  • the outputs 35, 36 of the diode circuit 2 are connected to each other via light emitting diodes 31, 32.
  • the described arrangement of the resistance circuit 1, the diode circuit 2 and the light emitting diodes 31, 32 has the Advantage that in comparison to the over the LEDs 31, 32 sloping at the supply terminals 15, 16 applied high voltage does not occur again in the circuit. The possibility of creepage distances with a voltage drop in the amount of voltage at the supply terminals 15, 16 is thus reduced to a creepage distance between the supply terminals.
  • Fig. 2 From the schematic representation of Fig. 2 is apparent as the component of a circuit arrangement according to Fig. 1 are arranged on a printed circuit board 4 according to the invention.
  • the supply terminals 15, 16 are provided in diagonally opposite areas 41, 42 of the printed circuit board 4.
  • the resistors 11, 12 and 13, 14 are mounted so that the shortest possible tracks between the supply terminals 15, 16 and the resistors 11, 12, 13, 14 are made. This is advantageous, since the conductor tracks cause the high voltages to be short and locally limited, which inhibits the formation of creepage distances. Further, the areas of the supply terminals 15, 16 and the resistors 11, 12, 13, 14 - ie the areas with the comparatively high voltages - through slots 43 in, the circuit board 4 from the remaining areas of the circuit board 4th demarcated. This also makes the formation of creepage distances difficult. In particular, the supply terminals 15, 16 are not short-circuited in a partial flooding of the printed circuit board 4 in vertical installation.
  • the components are arranged so that no tracks are passed under the components.
  • the copper surfaces have been dispensed with and supply terminals 15, 16 have been kept as small as possible, so that provide starting points for creepage distances only to a small extent.

Landscapes

  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Claims (6)

  1. Circuit imprimé avec un agencement de circuit électrique pour un feu de véhicule automobile avec des diodes électroluminescentes,
    l'agencement de circuit présentant deux raccordements électriques, un circuit résistif (1) de deux branches à une entrée et une sortie chaque fois et une ou plusieurs diodes électroluminescentes (31, 32),
    les branches étant connectées en série,
    l'agencement de circuit présentant un circuit à diodes,
    les diodes électroluminescentes (31, 32) étant connectées à des sorties du circuit à diode (2),
    caractérisé en ce que
    chaque entrée (15, 16) d'une branche du circuit résistif (1) est directement connectée à un raccordement électrique,
    que chaque sortie d'une branche du circuit résistif (1) est connectée chaque fois à une entrée (25, 26) du circuit à diode (2) et
    que les raccordements électriques et les branches du circuit résistif (1) sont disposés dans des parties diagonalement opposées (41, 42),
    que le circuit imprimé (4) entre les parties (41, 42) respectives avec les raccordements électriques et les branches du circuit résistif (1) est muni une ou plusieurs fois de fentes (43).
  2. Circuit imprimé selon la revendication 1,
    caractérisé en ce que chacune des branches présente au moins deux résistances (11, 12, 13, 14) branchées en parallèle.
  3. Circuit imprimé selon l'une des revendications 1 à 2,
    caractérisé en ce que le circuit à diode (2) présente deux branches connectées en parallèle qui d'un côté sont connectées à une entrée (25, 26) et de l'autre côté à une sortie du circuit direct (2), une diode étant disposée dans une branche qui est connectée dans le même sens par rapport aux diodes luminescentes (31, 32).
  4. Circuit imprimé selon l'une des revendications 1 à 3, caractérisé en ce que le circuit à diode (2) est un circuit à pont redresseur (21, 22, 23, 24).
  5. Circuit imprimé selon l'une des revendications 1 à 4, caractérisé en ce que les raccordements électriques sont disposés sur un côté du circuit imprimé (4).
  6. Feu avec une partie inférieure de boîtier, une partie supérieure de boîtier au moins partiellement transparente et un circuit imprimé selon l'une des revendications 1 à 5, caractérisé en ce que la partie supérieure de boîtier et/ou la partie inférieure de boîtier présente des traverses qui s'appuient sur la surface du circuit imprimé (4) ou qui s'encliquètent dans les fentes (43) du circuit imprimé (4).
EP02016583.3A 2001-08-16 2002-07-25 Luminaire automobile avec circuit et plaque conductrice associés Expired - Lifetime EP1289341B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10140275A DE10140275A1 (de) 2001-08-16 2001-08-16 Kfz-Leuchte, Schaltungsanordnung für eine Kfz-Leuchte und Leiterplatte für eine Kfz-Leuchte
DE10140275 2001-08-16

Publications (3)

Publication Number Publication Date
EP1289341A2 EP1289341A2 (fr) 2003-03-05
EP1289341A3 EP1289341A3 (fr) 2005-09-14
EP1289341B1 true EP1289341B1 (fr) 2018-08-29

Family

ID=7695685

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02016583.3A Expired - Lifetime EP1289341B1 (fr) 2001-08-16 2002-07-25 Luminaire automobile avec circuit et plaque conductrice associés

Country Status (2)

Country Link
EP (1) EP1289341B1 (fr)
DE (1) DE10140275A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7458705B2 (en) 2003-06-20 2008-12-02 Yazaki Corporation LED illumination device
DE102010014948A1 (de) 2010-04-14 2011-10-20 Hella Kgaa Hueck & Co. Anordnung zur energetischen Versorgung eines Leuchtmittels
DE102011112821B4 (de) 2011-09-12 2013-06-27 Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg Elektromotor, insbesondere Kühlerlüftermotor
KR102143222B1 (ko) * 2013-12-27 2020-08-11 엘지디스플레이 주식회사 무선 디스플레이 싱크 장치
DE102015221688A1 (de) 2015-11-05 2017-05-11 Osram Gmbh Verfahren zur Reduzierung von Leiterbahnabständen bei elektronischen Leiterplatten und elektronische Leiterplatte mit reduzierten Abständen zwischen Leiterbahnen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0315905A2 (fr) * 1987-11-07 1989-05-17 Werner Müller Dispositif électroluminescent
US5038255A (en) * 1989-09-09 1991-08-06 Stanley Electric Co., Ltd. Vehicle lamp

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4965457A (en) * 1989-02-17 1990-10-23 Avi Wrobel Removable panel illuminating module
US5404282A (en) * 1993-09-17 1995-04-04 Hewlett-Packard Company Multiple light emitting diode module
US5699231A (en) * 1995-11-24 1997-12-16 Xerox Corporation Method of packaging high voltage components with low voltage components in a small space
WO1999020085A1 (fr) * 1997-10-10 1999-04-22 Se Kang Electric Co., Ltd. Circuit de lampe electrique et structure utilisant des diodes electroluminescentes
GB2349519A (en) * 1999-04-30 2000-11-01 Apollo Fire Detectors Ltd Bipolar LED indicator; fire alarm systems

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0315905A2 (fr) * 1987-11-07 1989-05-17 Werner Müller Dispositif électroluminescent
US5038255A (en) * 1989-09-09 1991-08-06 Stanley Electric Co., Ltd. Vehicle lamp

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
RUDOLF F. GRAF: "Modern Dictionary of Electronics", 1999, NEWNES, ISBN: 0-7506-9866-7, pages: 158 - 158 *
TIM WILLIAMS: "The Circuit Designer's Companion", 2005, NEWNES, Great Britain, ISBN: 0-7506-6370-7, pages: 294 - 298 *

Also Published As

Publication number Publication date
EP1289341A2 (fr) 2003-03-05
EP1289341A3 (fr) 2005-09-14
DE10140275A1 (de) 2003-03-06

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