EP1541920A1 - Signalleuchte mit lichtemittierenden Dioden - Google Patents

Signalleuchte mit lichtemittierenden Dioden Download PDF

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Publication number
EP1541920A1
EP1541920A1 EP04292932A EP04292932A EP1541920A1 EP 1541920 A1 EP1541920 A1 EP 1541920A1 EP 04292932 A EP04292932 A EP 04292932A EP 04292932 A EP04292932 A EP 04292932A EP 1541920 A1 EP1541920 A1 EP 1541920A1
Authority
EP
European Patent Office
Prior art keywords
collimation
lenses
light according
plate
ribs
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
EP04292932A
Other languages
English (en)
French (fr)
Other versions
EP1541920B1 (de
Inventor
Patrice Bocktaels
Sylvain Perrot
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.)
Sagemcom Broadband SAS
Original Assignee
Sagem SA
Sagem Communications SAS
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 Sagem SA, Sagem Communications SAS filed Critical Sagem SA
Publication of EP1541920A1 publication Critical patent/EP1541920A1/de
Application granted granted Critical
Publication of EP1541920B1 publication Critical patent/EP1541920B1/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
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/12—Combinations of only three kinds of elements
    • 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
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]
    • 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
    • F21S43/255—Filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • F21V11/08—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using diaphragms containing one or more apertures
    • F21V11/12—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using diaphragms containing one or more apertures of slot type
    • 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
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2111/00—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
    • F21W2111/02—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00 for roads, paths or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to a traffic light with light-emitting diodes.
  • the object of the invention is to propose a fire signaling having a structure minimizing the ghost effect, preferably also improving the yield of light transmission.
  • a traffic light comprising a housing closed by a front lens and wherein is mounted a support plate carrying electroluminescent diodes, a transparent collimation plate interposed between the light-emitting diodes and the lens front and having on a side facing the front lens of diffusion lenses comprising cylindrical ribs extending parallel to the to each other, and an anti-ghost mask interposed between the collimation plate and the front lens and having opaque segments delineating slots extending in a direction corresponding to the ribs cylindrical.
  • the collimation plate features collimation lenses on one side facing the light-emitting diodes.
  • collimation lenses are lenses of individual aspheric revolution arranged opposite electroluminescent diodes.
  • the beam emitted by the light-emitting diodes is immediately concentrated in a parallel beam with a yield important transmission.
  • Collimation lenses have an axis of revolution shifted with respect to an axis of revolution of the light-emitting diode corresponding.
  • a beam is thus obtained parallel which is deflected at an angle corresponding to the distance between the axes of revolution so that the deviation sought is obtained by a simple determination the distance of shift between the axes of revolution.
  • the collimation plate has an axis of symmetry and has circular collimation ribs centered on the axis of symmetry, and the light-emitting diodes are arranged in a matrix in the vicinity from the focus of the collimation veins.
  • the traffic light comprises in known manner in itself a housing 1 closed by a front lens 2 and containing a support plate 3 supporting diodes electroluminescent 4. Also known per se the support plate 3 is preferably a printed circuit connected to a control organ (not shown) ensuring switching on and off the light-emitting diodes 4.
  • the traffic light comprises in addition a collimation plate 5.
  • the plate of collimation 5 has a face provided with collimation lenses 6 turned towards light-emitting diodes 4, and an opposite face provided with diffusion lenses 7.
  • each collimation lens 6 corresponds to a light-emitting diode 4 and has a paraboloid-shaped surface whose axis of revolution 8 is in the same vertical plane as the axis of revolution 9 of the diode.
  • electroluminescent 4 corresponding and extends parallel thereto but is shifted down by a distance d 1 (see Figures 5 and 6).
  • the collimation lenses 6 thus ensure not only a paralleling of the beam emitted by the light-emitting diode 4 but also a deflection of the parallel beam downwards as illustrated in FIG. 5.
  • the collimating lenses 6 are contiguous to one another and have a hexagonal contour which corresponds to the arrangement of the light-emitting diodes 4 on the support plate 3.
  • the face of the collimation plate 5 turned towards the light-emitting diodes 4 therefore has no protruding edge which can cause a parasitic diffusion of the light emitted by a external source.
  • the lenses 7 are constituted by ribs vertical cylindrical having a basic arcuate contour of circle so that the beam coming out of the plate of collimation 5 remains a parallel beam in a plane vertical ( Figure 5) but becomes a convergent beam in a horizontal plane ( Figure 6), this beam becoming diverging beyond the focus of the diffusion lenses 7.
  • the collimation plate 5 preferably comprises a multiplicity of diffusion lenses 7 for the same collimation lens 6.
  • the cylindrical ribs 7 are contiguous to each other and extend continuously over the entire height of the collimation plate 5 so that on the face of diffusion the collimation plate does not involve no no more protruding edge that could cause broadcasts parasites.
  • the collimation plate 5 is preferably made by injection from a plastic material transparent.
  • the traffic light comprises an anti-ghost mask 11 disposed between the collimation plate 5 and the front lens 2.
  • the anti-ghost mask 11 is a perforated plate comprising a series of openings 12 each corresponding to the beam coming out of the collimation plate 5 emitted by a light-emitting diode 4.
  • the anti-ghosting screen 11 is arranged parallel to the collimation plate 5 at a distance d 2 from it corresponding to the distance of the foci 10 from the diffusion lenses 7 (FIG. 6).
  • Each opening 12 has a series of vertical bars 13 having a diamond-shaped section spaced from one another to define vertical slots 14 having a width just sufficient to allow the convergent-divergent beams from the diffusion lenses 7 to pass (FIG. ).
  • the distance between the lenses of Cylindrical Diffusion 7 and Collimation Lenses 6 is adapted so that a parasitic beam that would reach to cross the diffusing lenses 7 and to reflect on collimation lenses 6 can not get focus in the slots 14 of the anti-ghost mask. The ghost effect is therefore further reduced by this arrangement.
  • the anti-ghost mask 11 can be made by injection from an opaque plastic material, preferably a dark matter so that the fire appears black to a user when light-emitting diodes 4 are off.
  • the lens 2 of the traffic light according to the invention can to be transparent clear, that is to say untinted, without increase the risk of a ghost effect. The yield of transmission is therefore increased compared to signaling that use a tinted front lens to obtain reflections reducing the ghost effect.
  • the front lens 2 has some ribs 15 to ensure dissemination according to guidelines which would not be reached by the scattered beam by the diffusion lenses 7.
  • the number of ribs 15 is however much smaller than the number of ribs usually necessary to ensure dissemination satisfactory in traditional traffic lights.
  • the traffic light has as before a front lens 102 behind which extends an anti-ghost mask 111 which is attached a collimation plate 105 whose rear face is illuminated by a matrix of diodes 104.
  • the collimation plate 105 has a front face with cylindrical ribs 107 extending vertically.
  • the anti-ghost mask 111 is in the form of a grid comprising vertical bars delimiting vertical slits.
  • the anti-ghost mask 111 is preferably disposed at a distance of the collimation plate corresponding to a plane of focal points of diffusion lenses 107.
  • the rear face of the collimation plate 105 has circular collimation ribs centered on the axis of symmetry of the collimation plate.
  • the ribs of collimation comprise a first group 100 of ribs 101 in the central part of the collimation plate and a second group 103 of ribs 106 in the part peripheral of the collimation plate.
  • the light-emitting diodes 104 are grouped according to a matrix of weak dimensions, for example according to a square matrix having a dimension of 50 mm for a traffic light having a diameter of 300 mm, which is arranged in the vicinity of the focus of the collimation veins, the axis of symmetry 115 of the matrix of light-emitting diodes 104 being shifted upwards by a distance d3 from the axis of symmetry 116 of the collimation plate 105 to ensure a deviation of the outgoing light beam of the collimation lens.
  • a matrix of weak dimensions for example according to a square matrix having a dimension of 50 mm for a traffic light having a diameter of 300 mm, which is arranged in the vicinity of the focus of the collimation veins, the axis of symmetry 115 of the matrix of light-emitting diodes 104 being shifted upwards by a distance d3 from the axis of symmetry 116 of the collimation plate 105 to ensure
  • the ribs 101 of the central portion 100 of the collimation plate 105 have a cylindrical face 108 which extends in parallel to the axis of symmetry 116 of the collimation plate and a conical face 109 presenting with respect to incident rays emitted by light-emitting diodes 104 an angle allowing refraction of these incident rays for the refracted rays to form a beam substantially parallel to the axis of symmetry 116 of the plate of collimation with regard to the diode located at focus, and tilted down for the diodes above fireplace.
  • the incident rays striking the faces 108 produce refracted rays which are lost rays, the ribs 101 will be so expected to have a small face 108 compared to the face 109.
  • the ribs 106 of the peripheral portion 103 comprise a cylindrical face 112 parallel to the symmetry axis of collimation and a conical face 113 inclined at an equal or slight angle lower than the angle of incidence of the rays emitted by the light-emitting diodes 104 to this part of the collimation plate.
  • the incident rays then undergo a refraction at the time of crossing the face 112 and a reflection on the face 113 to also form a beam of reflected rays extending parallel to the axis of symmetry 116 of the collimation plate with respect to the diode located at the focus, and inclined towards the low for the diodes above the fireplace.
  • the face of the front lens 102 facing the collimation plate 105 has horizontal grooves 114 shaped of concave cylinder portion.
  • the grooves 114 are made so that the surface of the part upper grooves 114 is substantially vertical while the surface of the lower part of the grooves 114 has a more pronounced angle with respect to a vertical plane. It is also possible to provide grooves 114 with different inclinations depending on the part of the frontal lens in which they extend.
  • the mask has been illustrated in the form of a perforated opaque plate, it can also be made in the form of a transparent plate on which the slots 14 are delimited by strips opaque printed by screen printing, or in the form of a machined or engraved metal plate. We can further minimize still the ghost effect by adding reliefs reflective on the face of the mask 11 facing the front lens 2.
  • the lenses have been described in the form of cylindrical ribs, they can to be made according to point lenses arranged according to rows to which correspond the slots of the anti-ghost mask.
  • cylindrical ribs 7 have been described with a basic outline in an arc, one may provide for different forms in order to obtain a special diffusion of light beams.
  • collimation lenses have been described with a parabolic shape that ensures a performance optimum transmission
  • lenses can be made of collimation having an aspheric form even a spherical shape without departing from the scope of the invention.
  • the downward deviation is achieved with optimum performance with an axis of the collimation lens parallel to the axis of the corresponding diode, one can also get a deviation by tilting the axis of the collimation lens but the transmission efficiency is reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Optical Communication System (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)
  • Traffic Control Systems (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Led Devices (AREA)
EP04292932A 2003-12-10 2004-12-09 Signalleuchte mit lichtemittierenden Dioden Not-in-force EP1541920B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0314456A FR2863686B1 (fr) 2003-12-10 2003-12-10 Feu de signalisation a diodes electroluminescentes
FR0314456 2003-12-10

Publications (2)

Publication Number Publication Date
EP1541920A1 true EP1541920A1 (de) 2005-06-15
EP1541920B1 EP1541920B1 (de) 2007-02-21

Family

ID=34508630

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04292932A Not-in-force EP1541920B1 (de) 2003-12-10 2004-12-09 Signalleuchte mit lichtemittierenden Dioden

Country Status (4)

Country Link
EP (1) EP1541920B1 (de)
AT (1) ATE354765T1 (de)
DE (1) DE602004004862T2 (de)
FR (1) FR2863686B1 (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1696171A1 (de) * 2005-02-28 2006-08-30 Osram Opto Semiconductors GmbH LED-Anzeigevorrichtung
FR2888796A1 (fr) * 2005-07-25 2007-01-26 Peugeot Citroen Automobiles Sa Feu de signalisation pour vehicule automobile
EP1762777A3 (de) * 2005-09-08 2007-08-01 Hella KG Hueck & Co. Leuchteinheit für Kraftfahrzeuge
FR2905321A1 (fr) * 2006-09-06 2008-03-07 Peugeot Citroen Automobiles Sa Dispositif lumineux de signalement de vehicule automobile a effet diode
NL2000916C2 (nl) * 2007-10-10 2009-04-14 Innovative & Superior Technology Inc LED lichtbronmodule met homogenisatie van lichtopbrengst.
WO2011039005A1 (de) * 2009-09-30 2011-04-07 Osram Opto Semiconductors Gmbh Led-verkehrssignal
ITFI20130290A1 (it) * 2013-11-29 2015-05-30 Iguzzini Illuminazione Dispositivo per la sagomatura di fasci luminosi emessi da apparecchi di illuminazione.
WO2019158890A1 (fr) * 2018-02-19 2019-08-22 Automotive Lighting Rear Lamps France Dispositif de signalisation pour véhicule automobile comprenant un écran opaque permettant le passage d'une plus grande quantité de lumière émise par une source de lumière dissimulée derrière ledit écran
FR3078139A1 (fr) * 2018-02-19 2019-08-23 Automotive Lighting Rear Lamps France Dispositif de signalisation pour vehicule automobile comprenant un ecran opaque permettant le passage d'une plus grande quantite de lumiere emise par une source de lumiere dissimulee derriere ledit ecran

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011117217A1 (de) 2010-03-24 2011-09-29 Siemens Aktiengesellschaft Optisches anzeigeelement sowie anzeigevorrichtung
DE102015109816A1 (de) * 2015-06-19 2016-12-22 Hella Kgaa Hueck & Co. Beleuchtungsvorrichtung für Fahrzeuge

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0081361A1 (de) * 1981-12-08 1983-06-15 LUCAS INDUSTRIES public limited company Leuchte
GB2194321A (en) * 1986-07-24 1988-03-02 George Howard Lloyd Lens system
EP0523927A2 (de) * 1991-07-17 1993-01-20 Precision Solar Controls Inc LED-Lampe mit Linse
US5636057A (en) * 1995-02-10 1997-06-03 Ecolux Inc. Prismatic toroidal lens and traffic signal light using this lens

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0081361A1 (de) * 1981-12-08 1983-06-15 LUCAS INDUSTRIES public limited company Leuchte
GB2194321A (en) * 1986-07-24 1988-03-02 George Howard Lloyd Lens system
EP0523927A2 (de) * 1991-07-17 1993-01-20 Precision Solar Controls Inc LED-Lampe mit Linse
US5636057A (en) * 1995-02-10 1997-06-03 Ecolux Inc. Prismatic toroidal lens and traffic signal light using this lens

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1696171A1 (de) * 2005-02-28 2006-08-30 Osram Opto Semiconductors GmbH LED-Anzeigevorrichtung
FR2888796A1 (fr) * 2005-07-25 2007-01-26 Peugeot Citroen Automobiles Sa Feu de signalisation pour vehicule automobile
EP1762777A3 (de) * 2005-09-08 2007-08-01 Hella KG Hueck & Co. Leuchteinheit für Kraftfahrzeuge
FR2905321A1 (fr) * 2006-09-06 2008-03-07 Peugeot Citroen Automobiles Sa Dispositif lumineux de signalement de vehicule automobile a effet diode
NL2000916C2 (nl) * 2007-10-10 2009-04-14 Innovative & Superior Technology Inc LED lichtbronmodule met homogenisatie van lichtopbrengst.
WO2011039005A1 (de) * 2009-09-30 2011-04-07 Osram Opto Semiconductors Gmbh Led-verkehrssignal
ITFI20130290A1 (it) * 2013-11-29 2015-05-30 Iguzzini Illuminazione Dispositivo per la sagomatura di fasci luminosi emessi da apparecchi di illuminazione.
WO2015079405A1 (en) * 2013-11-29 2015-06-04 Iguzzini Illuminazione S.P.A. Device for shaping light beams emitted by lighting fixtures
US10337698B2 (en) 2013-11-29 2019-07-02 Iguzzini Illuminazione S.P.A. Device for shaping light beams emitted by lighting fixtures
WO2019158890A1 (fr) * 2018-02-19 2019-08-22 Automotive Lighting Rear Lamps France Dispositif de signalisation pour véhicule automobile comprenant un écran opaque permettant le passage d'une plus grande quantité de lumière émise par une source de lumière dissimulée derrière ledit écran
FR3078139A1 (fr) * 2018-02-19 2019-08-23 Automotive Lighting Rear Lamps France Dispositif de signalisation pour vehicule automobile comprenant un ecran opaque permettant le passage d'une plus grande quantite de lumiere emise par une source de lumiere dissimulee derriere ledit ecran
US11415292B2 (en) 2018-02-19 2022-08-16 Marelli Automotive Lighting France Signaling device for a motor vehicle

Also Published As

Publication number Publication date
FR2863686B1 (fr) 2006-02-24
DE602004004862T2 (de) 2007-11-15
EP1541920B1 (de) 2007-02-21
ATE354765T1 (de) 2007-03-15
FR2863686A1 (fr) 2005-06-17
DE602004004862D1 (de) 2007-04-05

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