EP1628071A2 - Unité d'éclairage pour véhicules automobiles - Google Patents

Unité d'éclairage pour véhicules automobiles Download PDF

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Publication number
EP1628071A2
EP1628071A2 EP05107120A EP05107120A EP1628071A2 EP 1628071 A2 EP1628071 A2 EP 1628071A2 EP 05107120 A EP05107120 A EP 05107120A EP 05107120 A EP05107120 A EP 05107120A EP 1628071 A2 EP1628071 A2 EP 1628071A2
Authority
EP
European Patent Office
Prior art keywords
light
reflector
lighting unit
segments
unit according
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.)
Granted
Application number
EP05107120A
Other languages
German (de)
English (en)
Other versions
EP1628071A3 (fr
EP1628071B1 (fr
Inventor
Jörg Beykirch
Wolfgang Bode
Hans-Peter Brockmeyer
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 KGaA Huek and Co
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 KGaA Huek and Co filed Critical Hella KGaA Huek and Co
Publication of EP1628071A2 publication Critical patent/EP1628071A2/fr
Publication of EP1628071A3 publication Critical patent/EP1628071A3/fr
Application granted granted Critical
Publication of EP1628071B1 publication Critical patent/EP1628071B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/40—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the combination of reflectors and refractors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/337—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector having a structured surface, e.g. with facets or corrugations

Definitions

  • the invention relates to a lighting unit for motor vehicles with a light source, with a reflector associated with the light source and with a cover plate covering a front opening of the reflector, wherein the reflector is subdivided into a plurality of reflector segments.
  • a lighting unit for motor vehicles which has a luminaire housing with a light source and a reflector. A light exit opening of the housing is closed by means of a cover. To produce a visual impression, the lighting unit will be operated by means of a plurality of LEDs, a pinhole with a plurality of openings is arranged between the reflector and the cover. By means of the reflector, a parallel light beam impinges on the pinhole, wherein only the part of the light beam is emitted, which passes through the openings of the pinhole.
  • the disadvantage is that the known lighting unit has a reduced luminous efficacy.
  • a light unit for motor vehicles with a light source with a reflector and a cover
  • the reflector has a plurality of reflector segments.
  • the reflector segments are designed such that they each have a common segment center with maximum illumination intensity. Each segment center thus has a bright point of light, which gives the impression of a light emitting diode as a light source.
  • the reflector surfaces arranged around the segment center of the reflector segment are designed such that a predetermined light distribution is generated.
  • Object of the present invention is to develop a lighting unit for motor vehicles such that a modern LED styling with high brilliance and high luminous efficacy is achieved.
  • the invention in conjunction with the preamble of claim 1, characterized in that the reflector is preceded by a lens having a plurality of light segments, that the reflector segments each associated with the light-emitting segments and are formed such that at the reflector segments reflected light the respective associated light disk segments are bundled.
  • the particular advantage of the invention is that an increased brilliance of the LED styling is achieved by focusing light reflected by respective reflector segments onto corresponding upstream light disk segments.
  • the basic idea of the invention is to provide light disk segments in a light disk located in front of the reflector, in which light reflected by the reflector is bundled, so that the location of the light disk segments has a maximum illumination intensity.
  • a relatively bright point of light is created, which conveys the impression of a light diode downstream LED as a light source.
  • a relatively large reflector surface can be used to focus the light in the respective lens segments.
  • the light disk segments each have a lens structure, so that a predetermined light distribution is generated.
  • the surfaces of the reflector segment essentially serve to bundle the light in the respectively assigned light disk segments, while the light disk segments themselves are designed to generate a predetermined light distribution.
  • the reflector segments are composed in each case of a main section and of a plurality of secondary sections, wherein partial light bundles reflected by the secondary sections intersect a main light bundle reflected by the main section.
  • the main portion of the reflector segment is aligned with the respectively associated upstream lens segment. With its main light beam, it contributes substantially to the illumination intensity caused by the reflector segment on the light-emitting-disc segment.
  • the adjoining the main portion side sections have a relatively smaller area, so that they each contribute to a lesser extent to the illumination intensity at the lens segment.
  • the main portion of the reflector segment extends at a distance from an optical axis of the lighting unit, which coincides with the distance of the associated light slice segment to the optical axis.
  • the main light bundle reflected by the main section of the reflector segment is thus reflected substantially parallel to the optical axis in the direction of the light-emitting-disc segment.
  • the main portion of the reflector segment is parabolic, wherein the light source is disposed at the focal point of the main portion.
  • the main sections of the reflector segments extend - like the lens segments - in a circular ring about the optical axis, so that a circular LED styling is generated.
  • a lighting unit according to the invention for motor vehicles is preferably used as a tail lamp for generating a brake light, taillight or a combination thereof.
  • the lighting unit essentially comprises a light source 1, a reflector 2 associated with the light source 1, an optically-free cover 3 and a lens 4 arranged between the reflector 2 and the cover 3.
  • the reflector 2 has a plurality of reflector segments 5 arranged in the shape of a sector of a circle, each having a paraboloid-shaped main section H and an annular or semicircular secondary section N on the other.
  • the main sections H extend at an angle to an optical axis 8 of the lighting unit, on which an incandescent filament 9 of the light source 1 in the form of an incandescent lamp lies.
  • the main sections H extend in an equal radial distance annularly about the optical axis 8, wherein to the main portion H radially outwardly side sections N 1, N 2, N 3 and N 4 large and radially inward side sections I1, I2, I3, I4 , I5, I6 and I7.
  • the main sections H and the secondary sections N 1, N 2, N 3, N 4 are formed in such a way that, on the one hand, a partial light bundle h emitted by the incandescent filament 9 arranged at the focal point of the main section H meets the main portion H , is reflected by the same parallel to the optical axis 8 in the direction of a light-emitting segment 10 of the lens 4.
  • the light disk segments 10 are-like the main sections H -circular and extend concentrically in the circumferential direction of the lens 4, wherein they surround a central lens portion 11 having a remindstrahloptik Camill.
  • a prism structure 12 is applied to a side of the central lens section 11 facing away from the reflector 2.
  • the lens segments 10 extend in a plane which is perpendicular to the optical axis 8.
  • the principal portions H projected on the plane of extension of the lens 4 coincide in dimension with the lens segment 10.
  • the light beam n 1 or i 1 impinging on the outer side sections N 1 and I 1 adjacent to the main section H are reflected in the direction of the parallel light beam h so that they meet with it in the region of the light pane segment 10.
  • a light-emitting diode or LED
  • the reflector segments 5 arranged in the circumferential direction are each assigned a light-emitting-disc segment 10, which are distributed in a distributed manner around the optical axis 8 or the center axis of the lens 5.
  • the light-emitting-disc segments 10 can each have a lens structure 13 which has the incident light h , n 1, n 2, n 3, n 4, i 1, i 2, i 3, i 4, i 5, i 6, i 7 corresponding to one scatter the given light distribution.
  • a relatively small proportion of light preferably the light component emitted directly from the light source 1 to the front, is emitted to the outside through the central lens section 11.
  • This light component which is emitted directly to the front, together with the central light section 11, brings about a homogenization of the luminous area caused by the light disk 4.
  • the light-disk segments 10 on a side facing the reflector segment 5 can also have an optical structure 14 by means of which a specific light scattering can be generated.
  • a reflector tube 16 which has corrugation 17 on an inner side, adjoins the reflector segments 5 in the light emission direction 15.
  • the corrugation 17 is used essentially for design purposes and is visible through the crystal clear cover 3 from the outside.
  • the lens 4 is preferably colored red to produce a brake or tail light. But it can also be transparent.
  • the main sections H or the secondary sections N 1, N 2, N 3, N 4, I 1, I 2, I 3, I 4, I 5, I 6, I 7 can also be designed as free-form surfaces. It is essential that the light incident on the same and emitted by a central light source 1 be bundled in a light-emitting-segment 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP05107120.7A 2004-08-19 2005-08-02 Unité d'éclairage pour véhicules automobiles Expired - Lifetime EP1628071B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004040159A DE102004040159A1 (de) 2004-08-19 2004-08-19 Leuchteinheit für Kraftfahrzeuge

Publications (3)

Publication Number Publication Date
EP1628071A2 true EP1628071A2 (fr) 2006-02-22
EP1628071A3 EP1628071A3 (fr) 2008-07-02
EP1628071B1 EP1628071B1 (fr) 2014-02-12

Family

ID=35427624

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05107120.7A Expired - Lifetime EP1628071B1 (fr) 2004-08-19 2005-08-02 Unité d'éclairage pour véhicules automobiles

Country Status (2)

Country Link
EP (1) EP1628071B1 (fr)
DE (1) DE102004040159A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008019125A1 (de) * 2008-04-16 2009-10-22 Volkswagen Ag Fahrzeugleuchte

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6364514B1 (en) 1999-11-30 2002-04-02 Koito Manufacturing Co., Ltd. Vehicular indicator lamp
DE10124539A1 (de) 2001-05-19 2002-11-21 Reitter & Schefenacker Gmbh Heckleuchte für Fahrzeuge, insbesondere für Kraftfahrzeuge
DE10156973A1 (de) 2001-11-20 2003-05-28 Hella Kg Hueck & Co Fahrzeugleuchte

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3005954B2 (ja) * 1998-04-10 2000-02-07 スタンレー電気株式会社 灯 具
JP2945376B1 (ja) * 1998-05-01 1999-09-06 スタンレー電気株式会社 灯 具
DE10160052A1 (de) * 2001-12-06 2003-06-18 Hella Kg Hueck & Co Fahrzeugleuchte
DE10219246A1 (de) * 2002-04-18 2003-11-06 Valeo Beleuchtung Deutschland Beleuchtungseinrichtung für Kraftfahrzeuge

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6364514B1 (en) 1999-11-30 2002-04-02 Koito Manufacturing Co., Ltd. Vehicular indicator lamp
DE10124539A1 (de) 2001-05-19 2002-11-21 Reitter & Schefenacker Gmbh Heckleuchte für Fahrzeuge, insbesondere für Kraftfahrzeuge
DE10156973A1 (de) 2001-11-20 2003-05-28 Hella Kg Hueck & Co Fahrzeugleuchte

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008019125A1 (de) * 2008-04-16 2009-10-22 Volkswagen Ag Fahrzeugleuchte
DE102008019125B4 (de) * 2008-04-16 2025-04-30 Volkswagen Ag Fahrzeugleuchte mit einer Lichtquelle, zwei Reflektoren, zwei Lichtscheiben mit jeweils einer Leuchtfläche und einer Maske zwischen den zwei Leuchtflächen, die eine direkte Sicht auf die Lichtquelle verhindert

Also Published As

Publication number Publication date
DE102004040159A1 (de) 2006-02-23
EP1628071A3 (fr) 2008-07-02
EP1628071B1 (fr) 2014-02-12

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