EP1637800B1 - Signalleuchte, insbesondere für Kraftfahrzeuge - Google Patents

Signalleuchte, insbesondere für Kraftfahrzeuge Download PDF

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Publication number
EP1637800B1
EP1637800B1 EP05291918A EP05291918A EP1637800B1 EP 1637800 B1 EP1637800 B1 EP 1637800B1 EP 05291918 A EP05291918 A EP 05291918A EP 05291918 A EP05291918 A EP 05291918A EP 1637800 B1 EP1637800 B1 EP 1637800B1
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EP
European Patent Office
Prior art keywords
optical axis
reflector
light according
axis
mirror
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.)
Not-in-force
Application number
EP05291918A
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English (en)
French (fr)
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EP1637800A1 (de
Inventor
Patrice Collot
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.)
Valeo Vision SAS
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Valeo Vision SAS
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Publication date
Application filed by Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP1637800A1 publication Critical patent/EP1637800A1/de
Application granted granted Critical
Publication of EP1637800B1 publication Critical patent/EP1637800B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/26—Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255
    • 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

Definitions

  • the invention relates to a lighting and / or signaling device for a vehicle, more particularly a signaling light for a motor vehicle, of the type which comprises: a concave mirror of revolution around the optical axis admitting a focus on this axis; a light source arranged at or near the home; and an optic located in front of the light source.
  • a traffic light of this kind is known in particular after FR-A-2745365 .
  • Such a traffic light may serve as an indicator of a change of direction, a reversing light or any other light used on a motor vehicle.
  • the request for patent DE3035005 discloses a traffic light comprising a reflector divided into sectors which have a different focal length but whose foci merge at the level of the filament.
  • An optical element in the form of a disk of transparent material, is placed perpendicular to the optical axis. It has a face with saw teeth.
  • the object of the invention is, above all, to provide a signaling light of small dimensions having a maximum light output so that a high level of performance can be obtained in a small space, with a low power light source, considering the thermal requirements and the service life.
  • the proposed solution makes it possible to capture a large luminous flux whatever the axial or transverse orientation of the filament of the light source.
  • the invention relates to a traffic light, in particular for a motor vehicle, comprising: a concave mirror around the optical axis and a focus on this axis; a light source arranged at or near the home; and an optic located in front of the light source.
  • the optics is provided for straightening the light rays coming from the mirror and the mirror comprises a reflector converging and enveloping with respect to the light source, the optics being formed by a disc of transparent material orthogonal to the axis optical and centered on this axis, a face of the disc comprising prisms or pavers operating by refraction to straighten the light rays.
  • the term "fire” is used for the sake of brevity, to designate any lighting and / or vehicle signaling device.
  • a "convergent" mirror is understood to mean a mirror such that, if we consider the straight line passing through the optical axis and the focus, the rays reflected by the said mirror converge towards a point on this line.
  • straightening the light rays is understood to mean replacing the rays in a direction close to the optical axis, or even attenuating their convergence, so that, on average, those they are deviated by approaching an orientation parallel to the optical axis.
  • the mirror has an inner surface of revolution having a convergent meridian.
  • the meridian of the internal surface of the mirror is a curve arc or a conical arc, the conic having a focus coinciding with that of the reflector.
  • the mirror comprises a reflector with an inner surface of revolution having a meridian formed by a conical arc whose geometric axis is inclined at an angle, with respect to the axis of revolution, in a direction which makes the reflector wrapping with respect to the light source, the conic having a focus coinciding with that of the reflector.
  • the conical arc is a parabola bow.
  • the inclination of the meridian on the optical axis makes it possible to bring the reflecting surface closer to the optical axis and thus to make it more enveloping to capture a lot more luminous flux than with a conventional reflector of revolution.
  • the mirror generally comprises an opening in its bottom, in particular for the passage of the power supply of the light source; advantageously, the reflector is extended in the bottom zone by a second reflector formed by a ring of revolution about the optical axis.
  • this crown has meridian a parabola arc whose geometric axis coincides with the optical axis.
  • the focus of the parabolic crown coincides with the focus of the first reflector.
  • the line of intersection between the first and second reflectors is a circle whose plane is orthogonal to the optical axis, this circle constituting the base of a cone of revolution having its apex on the optical axis, with a half angle at the apex equal to the angle of inclination of the geometric axis of the meridian of the first reflector, this cone passing around the balloon of the light source, without interfering with it.
  • the angle of inclination of the geometric axis of the meridian of the first reflector with respect to the optical axis is preferably between 10 and 30 °, in particular between 15 ° and 25 °, in particular equal to or about 20 °.
  • the optics located in front of the source is designed to straighten the light rays coming from the mirror and thus form a beam that meets the regulatory requirements.
  • the prisms can be distributed according to concentric circular rings, divided into several angular sectors, in particular symmetrical two by two or with respect to a vertical axial plane, or with respect to a horizontal axial plane.
  • Prisms are advantageously designed to straighten more and more light rays when one deviates from the optical axis.
  • the faces of the prisms or paving stones may be curved, in particular along two orthogonal directions to ensure a vertical and horizontal deflection.
  • a signal light 1 for a motor vehicle, which comprises a concave mirror M paraboloid type.
  • the mirror M is of revolution around the optical axis YY of the fire, and admits a focus F located on this optical axis.
  • a light source S is disposed at the focus F or in its vicinity.
  • the light source S is advantageously constituted by a HiPer lamp 16W having a small balloon 4 or bulb of transparent material, in particular glass, substantially spherical, with a maximum diameter of about 18 mm.
  • a lamp has an axial filament which passes through the focus F or in its vicinity.
  • a lamp with transverse filament for example a white H21 lamp, in which case it would be necessary to provide a colored screen.
  • the optics 5 may be made of transparent material.
  • the light source may also be constituted by one or more light-emitting diodes or LEDs which illuminate laterally.
  • An optic 5 is located in front of the light source, according to the direction of propagation of the light rays.
  • the mirror M comprises a first reflector R1 having an internal reflective surface of revolution about the optical axis Y-Y.
  • the meridian of the reflecting surface of R1 is formed by a parabola arc 6a whose geometric axis Xa is inclined at an angle Ba with respect to the optical axis YY (axis of revolution) in one direction which makes the reflector R1 enveloping with respect to the light source S.
  • the intersection of the reflecting surface of the reflector R1 by the axial vertical plane comprises another parabolic arc 6b symmetrical with the first ratio to the axis YY.
  • the angle Ba is between 15 ° and 25 °, and is in particular equal to 20 °.
  • the inclination of the arches 6a, 6b makes it possible to capture much more luminous flux than with a conventional dish of revolution which would have the same maximum diameter.
  • the geometric focus of the parabola arches such as 6a, 6b coincides with the focus F of the traffic light.
  • a light ray i1 from the focus F and pointing towards the arc 6a is reflected along the radius k1 parallel to the geometric axis Xa of the arc 6a.
  • a light ray i2 coming from F and falling on the arc 6b is reflected along the radius k2 parallel to the geometric axis Xb of the arc 6b.
  • the light beam from the reflector R1 will therefore be essentially conical with its apex located on the optical axis Y-Y.
  • the mirror M has, in its bottom, an opening 8 for the passage of the base of the source S and its support.
  • the mirror M comprises a second reflector R2 formed by a parabolic crown of revolution about the optical axis YY.
  • This crown admits for meridian an arc of parabola 9 whose geometric axis coincides with the optical axis YY and whose focus coincides with F.
  • the two arcs 9 of the parabolic crown R2 located in the vertical plane of intersection of Fig. 1 belong to the same parable, which was not the case for arches 6a, 6b.
  • the connecting line 10 between the first reflector R1 and the second reflector R2 is a circle whose plane is orthogonal to the optical axis YY.
  • the diameter of this circle 10 is chosen so that the light rays i2 from the focus F and reflected by the zone of the meridians 6a, 6b close to the intersection line 10 are not intercepted by the balloon 4. This avoids a loss of luminous flux.
  • the surface of the cone is external or tangent to the balloon 4.
  • the smallest diameter of the parabolic crown 9, corresponding to the edge of the opening 8, is chosen such that a radius such as k4 reflected by the radially inner edge of the ring 9 remains spaced from the balloon 4 to avoid being intercepted.
  • the parabolic crown of revolution 9 makes it possible to obtain a parallel beam that does not converge in the lamp 2, which avoids a loss of luminous flux.
  • the beam obtained using the reflectors R1 and R2 and the source S produces a network of isolux curves, such as that illustrated on Fig. 3 , on a projection screen situated at a determined distance from the light and orthogonal to the optical axis YY.
  • the graduations of the screen correspond to the angle formed between the optical axis, which cuts the screen in the center, and a straight line passing through the focus and cutting the screen at the level of the graduation considered. These graduations range from -30 ° to + 30 ° both in the horizontal transverse direction and in the vertical direction.
  • the isolux obtained with the source S and the mirror M are formed substantially by circles centered on the optical axis Y-Y. The strongest illumination is obtained near this axis.
  • Such a distribution of the luminous flux does not satisfy the regulatory requirements according to which the isolux must substantially form a horizontally spread cross as illustrated on Fig. 16 .
  • the optics 5 arranged in front of the source S is designed to straighten the light rays and to form a beam according to the legislation according to Fig. 16 .
  • the optics 5 is formed by a disk 11 (see Fig. 2 ) of transparent material, in particular of plastic or glass, orthogonal to the optical axis and centered on this axis.
  • the front face of the disc 11 comprises prisms 12 or, more generally, blocks or blocks for straightening the light rays in order to obtain the grating.
  • Fig. 16 The front face of the disc 11 comprises prisms 12 or, more generally, blocks or blocks for straightening the light rays in order to obtain the grating.
  • Each prism 12 is oriented to give the desired photometry.
  • the front face of the disc 11 is divided into eleven concentric rings E1-E11 of the same radial width.
  • the width of the crowns will depend on the style desired for the traffic light.
  • the pitch may be about 2.5 mm.
  • the extra thickness created by the prisms or blocks 12 may be of the order of 1 mm.
  • the disc 11 is further divided into eight angular sectors D1, D2, ... D8 of 45 ° each.
  • Each sector is divided radially into four elementary zones of the same angular extent, which has been shown only for sector D4, for the sake of clarity of the drawing, but all other sectors are divided as D4.
  • a prism 12 corresponds to the intersection of an elementary zone and a crown.
  • the sector D5 is symmetrical sector D1 relative to the vertical plane passing through the optical axis.
  • the sectors D3 and D7 are symmetrical to one another with respect to the horizontal plane passing through the optical axis.
  • Sector D2 is between sectors D1 and D3 while sector D6 is between sectors D5 and D7.
  • Sectors D4 and D8 are respectively between sectors D3, D5 and D1, D7.
  • the prisms 12 may be straight prisms whose base (hypotenuse of the right-angled triangle section) is turned outward and inclined on the optical axis.
  • the inclination of the base is variable, depending on the distance to the optical axis, to modulate the recovery of the reflected rays according to the requirements.
  • the faces of the prisms or blocks 12 may be bulged in particular in two orthogonal directions to ensure a vertical and horizontal deflection.
  • Sector D5 gives a configuration, illustrated on Fig. 5 substantially symmetrical with the network of D1 with respect to the vertical plane passing through the optical axis, with a maximum illumination zone lying horizontally substantially between + 5 ° and + 12 ° and vertically between -3 ° and + 3 °.
  • Sector D3 gives the isolux network illustrated on Fig. 7 with a zone of maximum illumination (inner curve) lying horizontally substantially between -6 ° and + 6 ° and vertically between -12 ° and + 5 °.
  • Sector D7 gives the network of isolux shown on Fig. 8 which is substantially symmetrical with the network of the sector D3 with respect to the horizontal plane passing through the optical axis.
  • the addition of the networks of sectors D3 and D7, illustrated on Fig. 9 gives an illumination oriented mainly in the vertical direction.
  • Sector D2 gives an isolux network illustrated on Fig. 10 .
  • the grating has a mean direction inclined 45 ° from top to bottom, from right to left, and the maximum illumination area is, in the horizontal direction, substantially between -8 ° and + 4 ° and, depending on the vertical direction between -8 ° and + 4 °.
  • Sector D4 gives an isolux network illustrated on Fig. 11 practically symmetrical to the network of sector D2 ( Fig. 10 ) with respect to the vertical plane passing through the optical axis.
  • the union of isolux curves produced by sectors D2 ( Fig.10 ) and D4 ( Fig.11 ) is illustrated on Fig. 12 .
  • the zone of maximum illumination is comprised horizontally substantially between -5 ° and + 5 ° and vertically substantially between -7 ° and + 3 °.
  • the isolux curves surround this main zone with two branches extending downward on either side of the vertical plane substantially at a 45 ° inclination.
  • the network of isolux curves coming from sector D6 is illustrated on Fig. 13 and has a mean direction inclined substantially at 45 ° from bottom to top and from left to right.
  • the network of isolux curves of sector D8 is substantially symmetrical with that of sector D6 with respect to the vertical plane passing through the optical axis as illustrated in FIG. Fig. 14 .
  • the network of isolux curves resulting from the meeting of the D2 sectors ( Fig.11 ), D4 ( Fig.12 ), D6 ( Fig.13 ) and D8 ( Fig.14 ) is illustrated on Fig. 15 and has a substantially X-shaped mean line centered on the optical axis, the maximum illumination being in the central area.
  • Fig. 16 illustrates the network of isolux curves obtained with the signaling light according to the invention equipped with the optics 5.
  • the isolux curves are spread horizontally and vertically tightened, so as to meet the regulatory requirements.
  • the invention applies to a traffic light in general, including a traffic light.
  • the optical 5 instead of being located in a plane can be concave forward to avoid two incidents on the same block or optical block.
  • the optics 5 does not occupy exactly the expected position, it does not result in a major drawback: only the photometry and the network of isolux curves are slightly rotated. Keying is provided for the positioning of the optics 5, even if a mounting defect of this optics is not very sensitive. This would not be the case for mounting a lens in front of an ellipsoid type reflector, very sensitive to a mounting defect of the convergent lens located in front of the reflector.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Control Of Electric Motors In General (AREA)

Claims (13)

  1. Signalleuchte, insbesondere für Kraftfahrzeuge, mit: einem Konkavspiegel (M) um die optische Achse (Y-Y) und einem Brennpunkt auf dieser Achse; einer im Brennpunkt oder dessen Nähe angeordneten Lichtquelle (S); und einer vor der Lichtquelle liegenden Optik (5), wobei die Optik (5) zum Ausrichten der vom Spiegel (M) stammenden Lichtstrahlen vorgesehen ist, wobei der Spiegel (M) einen konvergierenden und in Bezug auf die Lichtquelle umhüllenden Reflektor (R1) umfasst, und wobei die Optik (5) von einer Scheibe (11) aus lichtdurchlässigem Material gebildet ist, die zur optischen Achse orthogonal und auf diese Achse zentriert ist, wobei eine Seite der Scheibe lichtbrechend wirkende Primen (12) oder Blöcke zum Ausrichten der Lichtstrahlen aufweist, und wobei der Spiegel (M) in seinem Boden eine Öffnung (8) aufweist,
    dadurch gekennzeichnet, dass der Reflektor (R1) im Bodenbereich durch einen zweiten Reflektor (R2) fortgesetzt wird, der durch einen Rotationsring um die optische Achse gebildet ist, wobei der Ring einen Parabelbogen (9) als Meridianlinie hat, dessen geometrische Achse mit der optischen Achse (Y-Y) zusammenfällt.
  2. Signalleuchte nach dem vorhergehenden Anspruch,
    dadurch gekennzeichnet, dass der Brennpunkt des Parabelrings (9) mit dem Brennpunkt des ersten Reflektors (R1) zusammenfällt.
  3. Signalleuchte nach Anspruch 1 oder 2,
    dadurch gekennzeichnet, dass die Schnittlinie zwischen dem ersten (R1) und dem zweiten Reflektor (R2) ein Kreis (10) ist, dessen Ebene orthogonal zur optischen Achse (Y-Y) ist, wobei der Kreis die Basis eines Rotationskegels bildet, dessen Spitze (C) auf der optischen Achse liegt, wobei ein halber Kegelwinkel (α) gleich dem Neigungswinkel (Ba) der geometrischen Achse (Xa) der Meridianlinie des ersten Reflektors ist, wobei der Kegel um den Kolben (4) der Lichtquelle verläuft, ohne diesen zu überlagern.
  4. Signalleuchte nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass die Scheibe eine Seite mit geraden Prismen (12) aufweist, deren Basis nach außen gerichtet und dabei zur optischen Achse geneigt ist, wobei die Prismen lichtbrechend wirken, um die Lichtstrahlen auszurichten.
  5. Signalleuchte nach dem vorhergehenden Anspruch,
    dadurch gekennzeichnet, dass der Spiegel (M) eine innenseitige Rotationsfläche mit einer konvergenten Meridianlinie (6a) aufweist.
  6. Signalleuchte nach dem vorhergehenden Anspruch,
    dadurch gekennzeichnet, dass die Meridianlinie (6a) der Innenseite des Spiegels (M) ein Kurvenbogen oder ein Kegelschnittbogen ist, wobei der Brennpunkt des Kegelschnitts mit dem Brennpunkt (F) des Reflektors zusammenfällt.
  7. Signalleuchte nach dem vorhergehenden Anspruch,
    dadurch gekennzeichnet, dass die Meridianlinie (6a) von einem Kegelschnittbogen gebildet ist, dessen geometrische Achse (Xa) in einem Winkel (Ba) bezüglich der Rotationsachse (Y-Y) geneigt ist.
  8. Signalleuchte nach einem der Ansprüche 6 oder 7,
    dadurch gekennzeichnet, dass der Kegelschnittbogen ein Parabelbogen (6a) ist.
  9. Signalleuchte nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass der Neigungswinkel (Ba) der geometrischen Achse (Xa) der Meridianlinie des ersten Reflektors bezüglich der optischen Achse (Y-Y) zwischen 10° und 30° liegt, insbesondere zwischen 15° und 25°, speziell gleich 20° ist.
  10. Signalleuchte nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass die Prismen (12) oder Blöcke entlang konzentrischer kreisförmiger Ringe (E1,...E11) verteilt sind, die in verschiedene Winkelsektoren (D1,...D8) unterteilt sind.
  11. Signalleuchte nach dem vorhergehenden Anspruch,
    dadurch gekennzeichnet, dass die Winkelsektoren (D1,...D8) entweder bezüglich einer axialen Vertikalebene oder bezüglich einer axialen Horizontalebene paarweise symmetrisch sind.
  12. Signalleuchte nach einem der Ansprüche 1 bis 11,
    dadurch gekennzeichnet, dass die Prismen (12) oder Blöcke vorgesehen sind, um die Lichtstrahlen umso stärker auszurichten, je größer der Abstand zur optischen Achse ist.
  13. Signalleuchte nach einem der Ansprüche 1 bis 12,
    dadurch gekennzeichnet, dass die Flächen der Prismen (12) oder Blöcke gewölbt sind, insbesondere in zwei orthogonalen Richtungen, um eine vertikale und horizontale Ablenkung zu gewährleisten.
EP05291918A 2004-09-21 2005-09-16 Signalleuchte, insbesondere für Kraftfahrzeuge Not-in-force EP1637800B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0409984A FR2875578B1 (fr) 2004-09-21 2004-09-21 Feu de signalisation, en particulier pour vehicule automobile

Publications (2)

Publication Number Publication Date
EP1637800A1 EP1637800A1 (de) 2006-03-22
EP1637800B1 true EP1637800B1 (de) 2009-11-18

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ID=34949017

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05291918A Not-in-force EP1637800B1 (de) 2004-09-21 2005-09-16 Signalleuchte, insbesondere für Kraftfahrzeuge

Country Status (5)

Country Link
US (1) US7607810B2 (de)
EP (1) EP1637800B1 (de)
AT (1) ATE449287T1 (de)
DE (1) DE602005017722D1 (de)
FR (1) FR2875578B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI455838B (zh) * 2012-07-27 2014-10-11 Tyc Brother Ind Co Ltd 車用複合反射及折射多重成像裝置

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EP2201291B1 (de) * 2007-09-17 2011-06-15 IMC Est. Beleuchtungskörper
EP2500628B1 (de) * 2011-03-14 2020-05-06 Stanley Electric Co., Ltd. KFZ-Scheinwerfer
JP5748531B2 (ja) * 2011-04-12 2015-07-15 株式会社小糸製作所 車両用灯具

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US3944810A (en) * 1975-02-18 1976-03-16 General Electric Company Luminare
DE3035005A1 (de) * 1980-09-17 1982-04-29 Ulo-Werk Moritz Ullmann Gmbh & Co Kg, 7340 Geislingen Leuchte, insbesondere signalleuchte fuer zweiradfahrzeuge
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FR2745365B1 (fr) 1996-02-23 1998-05-07 Valeo Vision Feu de signalisation a moyens perfectionnes d'etalement de la lumiere
JP3986759B2 (ja) * 2001-01-16 2007-10-03 株式会社小糸製作所 車両用前照灯
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI455838B (zh) * 2012-07-27 2014-10-11 Tyc Brother Ind Co Ltd 車用複合反射及折射多重成像裝置

Also Published As

Publication number Publication date
EP1637800A1 (de) 2006-03-22
DE602005017722D1 (de) 2009-12-31
ATE449287T1 (de) 2009-12-15
FR2875578A1 (fr) 2006-03-24
US7607810B2 (en) 2009-10-27
FR2875578B1 (fr) 2006-12-15
US20060062010A1 (en) 2006-03-23

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