EP1008800B1 - Phare - Google Patents

Phare Download PDF

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Publication number
EP1008800B1
EP1008800B1 EP99123874A EP99123874A EP1008800B1 EP 1008800 B1 EP1008800 B1 EP 1008800B1 EP 99123874 A EP99123874 A EP 99123874A EP 99123874 A EP99123874 A EP 99123874A EP 1008800 B1 EP1008800 B1 EP 1008800B1
Authority
EP
European Patent Office
Prior art keywords
light
reflector
fact
headlamp according
entry surface
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
EP99123874A
Other languages
German (de)
English (en)
Other versions
EP1008800A3 (fr
EP1008800A2 (fr
Inventor
Karsten Dr. Eichhorn
Susanne Hagedorn
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 EP1008800A2 publication Critical patent/EP1008800A2/fr
Publication of EP1008800A3 publication Critical patent/EP1008800A3/fr
Application granted granted Critical
Publication of EP1008800B1 publication Critical patent/EP1008800B1/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
    • 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
    • F21S41/334—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors
    • 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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/24—Light guides
    • 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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/28—Cover glass

Definitions

  • the invention relates to a headlight based on the projection principle from a reflector and a light source enclosed by the reflector for Formation of a converging light beam and an in Direction of light propagation downstream of a part of the shade Bundle of light and a light body for generating a predetermined Light distribution.
  • a headlight for vehicles is known that one Reflector with an optical axis extending in the horizontal direction, a first focus and a second focus further from the reflector than the first focal point is distant.
  • a light source is arranged in the reflector, the reflector being designed that it reflects light rays emitted by the light source so that these at converge at its second focus.
  • the second focal point of the reflector a cover screen is arranged adjacent.
  • a focussing light body is arranged downstream of this diaphragm has a focus near the second focus of the reflector and the shaded by the course of the aperture in the focal plane
  • Light distribution depicts focal plane in infinity.
  • Disadvantage of that known headlights is that it requires a relatively complex structure, in particular due to the presence of a plurality of components. Further it has a relatively large construction volume, with the light only in width can be spread to a limited extent.
  • EP 0 678 699 A1 describes a vehicle headlight with a light body which has a light exit surface with a convex shape. This enables that on a light entry surface of the light body directly from a subsequent light guide transferred light rays to form a predetermined light distribution can be deflected. Between the light guide and the A light entry surface of the light body is arranged to form an aperture Light / dark boundary.
  • a disadvantage of the known headlights is that the Light losses are relatively high; on the one hand by the length and shape of the light guide and on the other hand by shadowing part of the light guide transmitting light beam.
  • the object of the present invention is to provide a headlight of this type to further develop that the luminous efficiency is improved and the structure is simplified can be.
  • the object is achieved in that the light body in Light propagation direction is elongated to form a Light guiding element and one downstream in the direction of light propagation Lens element, wherein a light exit surface of the lens element is arcuate is formed and wherein a light entry surface of the light guide element in one to the focal point of the lens element and to the focal plane of the reflector near area is arranged.
  • the advantage of the invention is in particular that the training of Light body, a compact structure of the headlamp can be realized.
  • the Light body forms the light rays entering the light entry surface after a predetermined light distribution.
  • a subordinate to the light body Diffuser can be omitted. It can be a relatively small volume of the Achieve headlights, the luminous flux can be increased because that Beam of light emitted by the reflector on the arrangement of the light entry surface the light body is adapted.
  • the basic idea of the invention is to make the light body elongate, so that he is with his light entry surface from the outside of the reflector arranged focal plane of the same up to one in the direction of light propagation downstream arched light exit surface extends. It can be advantageous Light body by a arranged on the side facing the reflector Light guiding element and by one on the side facing away from the reflector arranged lens element can be formed.
  • the light guide element is used for one to the incoming light beam in a predetermined manner Guide lens element, and on the other hand, the means of shadowing record or train. Due to the shape of the lens element Light distribution affected. Accordingly, the light body as a whole is suitable for Shape and dimensioning of its components, namely the Light guiding element and the lens element, in cooperation with the Reflector an improved light distribution of different light functions enable.
  • this Light guiding element two opposite, running in the vertical direction flat side surfaces on which the rays entering through the light entry surface horizontally through total reflection in the direction of the light exit surface. There they emerge from the light body at approximately the same angle as they do in these have occurred.
  • the light exit surface is of the lens element in the form of an arc in vertical clearing. This leaves in the vertical direction that generated by the reflector in the focal plane Show light distribution.
  • the reflector is as Open space reflector formed of a plurality of reflector segments having. These reflector segments are aligned in such a way that those of them reflected light rays on the light entry surface, which is adjacent to the means for Shade is arranged to hit. Through this targeted steering of Light rays on the light entry surface can have a higher luminous flux yield achieve.
  • the reflector is identical by two trained reflector halves formed, the reflector halves by a vertical longitudinal center plane of the reflector are separated.
  • the reflector segments of the respective reflector halves are aligned so that a Luminosity maximum on a half assigned to the respective reflector half the light entry surface is generated.
  • the reflector half preferably produces this Maximum on such a half of the light entry surface that is on the same Side extends the vertical longitudinal median plane.
  • the maximum is preferably as Focal spot or focal zone is flat.
  • the two regarding the Light distributions arranged symmetrically in the longitudinal center plane Light entry surface are influenced by the light body in such a way that from the Beams of light emerging a light distribution with a single central maximum area generated for a fog light function.
  • the reflector segments can produce a different symmetrical light distribution or the size of the central maximum area can be varied.
  • the means for shadowing is as evaporated opaque coating on a portion of the Surface of the light guide element facing the reflector is formed. hereby can easily the light guide element for receiving the agent for Shade serve.
  • the shading is essentially by a Bevel created. Additional means for shadowing can therefore be dispensed with become.
  • the weight of the light guiding element or the Light body can be reduced.
  • a working on the projection principle headlight (1) consists in essentially of a reflector (2), a light source (3) and a light body (4).
  • the light source (3) is in the vicinity of the first focal point (f1) of the reflector (2) arranged.
  • the reflector (2) is bowl-shaped and has one central opening (5), which serves as a lamp holder hole for the light source (3).
  • the light source (3) can be designed, for example, as an H7 or H3 incandescent lamp his.
  • the reflector (2) is an open-space reflector formed and has a plurality of reflector segments (6) with different imaging surfaces.
  • the reflector (2) has an ellipsoid-like shape and generates a light beam converging in a focal plane (7).
  • In the Focal plane (7) is the second focal point (f2) of the reflector (2).
  • the light body (4) has a reflector (2) facing Side a light guide element (10) and on a the reflector (2) facing away Side a lens element (11).
  • the light body (4) is in one piece and elongated along an optical axis (12).
  • the light guide element (10) is formed from the flat light entry surface (8), which is preferably rectangular. To the light entry surface (8) close two opposite, extending in the vertical direction parallel side surfaces (13). The light entry surface (8) also adjoins each have a bevelled top (14) and a bottom (15). This cause the cross section of the Light guiding element (10) in the direction of the light propagation direction according to the arrow (16). At one end of the light guide element facing away from the reflector (2) (10) this passes over into the lens element (11) to form an edge (17).
  • the lens element (11) has two opposing, immediately adjacent to the Side surfaces (13) of the light guide element (10) in a common plane adjoining side surfaces. Extends from the upper edge (17) the opposite lower edge (17) is a circular arc Light exit surface (19).
  • the shape of the light exit surface (19) extends in a vertical plane - the effect Light body (4) only as a lens in the vertical direction. in a horizontal direction there is a free distribution of light, with the light in width is reflected.
  • the reflector (2) is symmetrical with respect to a vertical longitudinal center plane (V) formed and has a left reflector half (21) and a right reflector half (22).
  • V vertical longitudinal center plane
  • the right reflector half (22) causes a corresponding reflection of the Light rays on the right side (24) of the light entry surface (8).
  • the respective reflector segments (6) aligned such that on the respective sides (23, 24) of the light entry surface (8) above a horizontal (H) club-shaped focal spot (25) arises.
  • This focal spot (25) forms a flat one Maximum of light intensity.
  • the Coating (26) serves as a means of shading, so that by the subordinate light bodies (4) only those above the horizontal (H) incident light rays can be forwarded.
  • the along the The horizontal (H) edge of the coating (26) forms the Light / dark limit of the light distribution generated by the light body (4).
  • this light distribution can also be carried out by a light body (31) according to FIG 5 are generated, which, in contrast to the previous light body (4) top (33) and a bottom (34) running parallel to the horizontal (H) having.
  • the top (33) and bottom (34) are parallel and perpendicular to the side surfaces (35), which also run parallel Light guiding element (32).
  • Figure 7 shows a further alternative embodiment of a light body (37) one below the horizontal (H) in which the optical axis (12) runs has a beveled scraping surface (38).
  • This shading surface (38) extends itself at an angle of 45 degrees to the horizontal (H). It is translucent trained and enables due to the discontinuous transition along a Edge (39) to a light entry surface (40) has a sharp light / dark boundary. However, this is to the light / dark limit of the previous one Embodiments extended comparatively, so that a reduction in disturbing color fringing occurs in the light distribution.
  • the light body (37) due to its beveled shape, it is lighter in weight.
  • the Light entry surface (40) is compared to the previous exemplary embodiments somewhat smaller. Between the upper edge of the light entry surface (40) and an inclined surface (42) is formed on a horizontally running upper side (41), which serves to minimize the vertical expansion of the light distribution.
  • the light bodies described above are preferably made of glass and preferably have a length of 50 mm and a width of 20 mm.
  • the Light body is at a distance of 10 mm from the light entry surface formed by the plane formed by the reflector edge.
  • By a different design of the light body can also other light functions, For example, generate basic or cornering light.
  • the light body (31) according to FIG. 5 has significant advantages over the light body (4) according to FIGS. 1 and 2.
  • the course of the same limit light beam (43) is shown, which is under one same entry angle into the light body (4) or (31).
  • the light beam (43) is applied to the inclined underside (15) of the light body (4) the same and then totally reflected on the other surfaces (19, 14), so that it is in aiming around the light body (4) aimlessly until it hits the light entry surface (8) exit.
  • the boundary light beam (43) can therefore not be used for imaging.
  • the comparatively large-volume light body (31) enables the Border light beam (43) in the area of the curved light exit surface on the underside (34), where it is partly broken and in the direction of light propagation (16) can be used and on the other hand partly totally reflected and upwards is distracted.
  • the luminous efficacy can thereby be increased considerably.
  • FIG. 9 when the light body (37) is formed, Figure 7 with the slope (38) of the boundary beam (43) is not affected, so that this a reduction in weight and less installation space with the same light output is created.
  • the light / dark boundary (28) is formed by the slope (38), wherein the slope (38) preferably has a shading coating for Avoid unwanted glare.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Claims (10)

  1. Phare selon le principe de projection, constitué par un réflecteur (2) et par une source lumineuse (3) entourée par le réflecteur (2) pour former un faisceau lumineux convergent dans un plan focal (7) du réflecteur (2) et par un moyen d'obscurcissement (26) agencé en aval en direction de propagation de la lumière (16) pour obscurcir une partie du faisceau lumineux, ainsi que par un corps lumineux (4) destiné à produire une répartition de lumière prédéterminée, caractérisé en ce que le corps lumineux (4) est réalisé allongé et d'un seul tenant en formant un élément de guidage de lumière (10) et un élément de lentille (11) agencé en aval en direction de propagation de la lumière (16), une surface de sortie de lumière (19) de l'élément de lentille (11) étant réalisée de forme arquée, une surface d'entrée de lumière (8) de l'élément de guidage de lumière (10) étant agencée à un foyer (f2) de l'élément de lentille (11) et dans le plan focal (7) du réflecteur (2), et les rayons lumineux étant totalement réfléchis en direction horizontale sur des surfaces latérales (13) de l'élément de guidage de lumière (10).
  2. Phare selon la revendication 1, caractérisé en ce que l'élément de guidage de lumière (10) présente des faces latérales (13) planes latéralement opposées et s'étendant en direction verticale, et en ce que la surface de sortie de lumière (19) de l'élément de lentille (11) est réalisée de forme arquée en direction verticale.
  3. Phare selon l'une ou l'autre des revendications 1 et 2, caractérisé en ce que le corps lumineux (4) est réalisé symétrique par rapport à un plan médian longitudinal (H) horizontal, au moins une face supérieure (14, 41) et/ou une face inférieure (15, 38) de l'élément de guidage de lumière (10) s'écartant en permanence de la surface d'entrée de lumière (8, 40).
  4. Phare selon l'une des revendications 1 à 3, caractérisé en ce que la surface d'entrée de lumière (8) de l'élément de guidage de lumière (10) est réalisé planaire et est orientée perpendiculairement à l'axe optique (12) du réflecteur (2).
  5. Phare selon l'une des revendications 1 à 4, caractérisé en ce que le réflecteur (2) est réalisé sous forme de réflecteur à surface libre avec une multitude de segments de réflecteur (6') qui sont orientés de telle sorte qu'une répartition de lumière prédéterminée est produite sur la surface d'entrée de lumière (8) de l'élément de guidage de lumière (10), en ce que les segments de réflecteur (6') sont orientés de manière à produire deux taches focales agencées en décalage en direction horizontale sur la surface d'entrée de lumière 8, et en ce que le réflecteur (2) est réalisé symétriquement à un plan médian longitudinal (V) vertical en formant une moitié de réflecteur gauche (21) et une moitié de réflecteur droite (22) égales, et en ce que la moitié de réflecteur gauche (21) réfléchit les rayons lumineux sur un côté gauche (23) et la moitié de réflecteur droite (22) réfléchit les rayons lumineux sur un côté droit (24) de la surface d'entrée de lumière (8, 19).
  6. Phare selon l'une des revendications 1 à 5, caractérisé en ce que les segments de réflecteur (6') agencés à proximité d'une ouverture (5) centrale du réflecteur (2) et/ou du plan médian longitudinal (V) vertical sont orientés de telle sorte que les rayons lumineux réfléchis par ceux-ci sont incidents sur la surface d'entrée de lumière (8) sous un angle proche de 0 degré par rapport au plan médian longitudinal (V) vertical.
  7. Phare selon l'une des revendications 1 à 6, caractérisé en ce que le moyen d'obscurcissement est réalisé sous forme de revêtement (26) opaque métallisé sous vide sur une région partielle de la surface de l'élément de guidage de lumière qui est tournée vers le réflecteur (2).
  8. Phare selon l'une des revendications 1 à 7, caractérisé en ce que la surface de l'élément de guidage de lumière, qui est tournée vers le réflecteur (2), est constituée par une surface d'entrée de lumière (40) planaire au-dessus d'une horizontale (H) et par une surface d'obscurcissement inclinée (38) au-dessous de l'horizontale (H).
  9. Phare selon la revendication 8, caractérisé en ce que la surface d'obscurcissement (38) inclinée s'étend vers le bas sous un angle de 45 degrés par rapport à l'horizontale (H) du corps lumineux (4).
  10. Phare selon l'une des revendications 1 à 9, caractérisé en ce que le bord supérieur de la surface d'entrée de lumière (40) est réalisée sous forme de surface inclinée (42).
EP99123874A 1998-12-12 1999-12-02 Phare Expired - Lifetime EP1008800B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19857439A DE19857439A1 (de) 1998-12-12 1998-12-12 Scheinwerfer
DE19857439 1998-12-12

Publications (3)

Publication Number Publication Date
EP1008800A2 EP1008800A2 (fr) 2000-06-14
EP1008800A3 EP1008800A3 (fr) 2001-10-17
EP1008800B1 true EP1008800B1 (fr) 2004-10-13

Family

ID=7890908

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99123874A Expired - Lifetime EP1008800B1 (fr) 1998-12-12 1999-12-02 Phare

Country Status (3)

Country Link
EP (1) EP1008800B1 (fr)
DE (2) DE19857439A1 (fr)
ES (1) ES2230788T3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007014215A1 (de) * 2007-03-24 2008-09-25 Hella Kgaa Hueck & Co. Scheinwerfer für Fahrzeuge

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB544473A (en) * 1939-05-22 1942-04-15 Aroldo Chiti Improvements relating to lamps, more particularly for vehicles
FR2514105A1 (fr) * 1981-10-05 1983-04-08 Cibie Projecteurs Projecteur a conduit de lumiere pour vehicules automobiles
DE3516813A1 (de) * 1985-05-10 1986-11-13 Hella KG Hueck & Co, 4780 Lippstadt Abgeblendeter fahrzeugscheinwerfer
AT400887B (de) * 1993-05-03 1996-04-25 Zizala Lichtsysteme Gmbh Fahrzeugscheinwerferprojektionslinse
JPH07312103A (ja) * 1994-03-22 1995-11-28 Nippondenso Co Ltd 灯具装置
JP3337560B2 (ja) * 1994-07-21 2002-10-21 株式会社デンソー 車両用灯具装置
JPH08339704A (ja) * 1995-06-12 1996-12-24 Nippondenso Co Ltd 車両用灯具装置
DE19705146A1 (de) * 1997-02-11 1998-08-13 Hella Kg Hueck & Co Beleuchtungsvorrichtung für Kraftfahrzeuge

Also Published As

Publication number Publication date
EP1008800A3 (fr) 2001-10-17
DE19857439A1 (de) 2000-06-15
ES2230788T3 (es) 2005-05-01
DE59910823D1 (de) 2004-11-18
EP1008800A2 (fr) 2000-06-14

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