EP1091167A2 - Dispositif de signalisation avec rangées de diodes électroluminescentes - Google Patents

Dispositif de signalisation avec rangées de diodes électroluminescentes Download PDF

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Publication number
EP1091167A2
EP1091167A2 EP00890305A EP00890305A EP1091167A2 EP 1091167 A2 EP1091167 A2 EP 1091167A2 EP 00890305 A EP00890305 A EP 00890305A EP 00890305 A EP00890305 A EP 00890305A EP 1091167 A2 EP1091167 A2 EP 1091167A2
Authority
EP
European Patent Office
Prior art keywords
light
led
optics according
condenser
signal generator
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.)
Withdrawn
Application number
EP00890305A
Other languages
German (de)
English (en)
Other versions
EP1091167A3 (fr
Inventor
Franz Ing. Silhengst
Alexander Dipl.-Ing. Otto
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.)
Swarco Futurit Verkehrssignalsysteme Ges mbH
Original Assignee
Swarco Futurit Verkehrssignalsysteme Ges mbH
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 Swarco Futurit Verkehrssignalsysteme Ges mbH filed Critical Swarco Futurit Verkehrssignalsysteme Ges mbH
Publication of EP1091167A2 publication Critical patent/EP1091167A2/fr
Publication of EP1091167A3 publication Critical patent/EP1091167A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/095—Traffic lights
    • 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

  • a high light intensity requires an LED arrangement that is as accurate as possible Light adaptation to the distribution regulations allowed to the existing Make optimal use of the amount of light. Because practically all LEDs do not emit light with the prescribed light distribution must either disproportionately more LED to be used throughout Distribution area to get enough light, or additional optics provided become.
  • the size of the phantom light is increased in Europe by the ratio of useful light Phantom light qualified and divided into classes, according to a German standard the phantom light must not exceed absolutely fixed values. In both cases, the sum of light from signal and phantom light must be the prescribed Comply with light colors for signal lights.
  • the specifications regarding the light color of the sum of light can be by Coloring the lens are met, which also the phantom light in to a much higher degree than the useful light is reduced. Further measures to lower the phantom light, as they are known, set one almost homogeneous, parallel beam path within the optics ahead, as he does hitherto through a parabolic reflector with a light source that is as punctiform as possible was generated, in which slats or light grid are used, or they focus the useful light on small openings, which are in a defined grid a black matt cover are attached, which the incident sunlight mostly absorbed. There are also other options for conventional signals with a single point light source, which here are not relevant.
  • Another assessment criterion is the overall depth. The lower the more There are design options for the signal generator itself, but also all the more more additional components such as detectors and controls can be found in the accommodate existing housings.
  • a generally widespread version has one in the front of the Signal chamber inserted flat matt black disc, which mostly as Printed circuit board and is provided with a voltage supply. She is with a sufficient number of individual light-emitting diodes in the appropriate light color, evenly distributed over the entire area, equipped and is by one superior, transparent cover plate protected against weather, which often also contains optical elements to improve light distribution. Furthermore are also known simpler versions, where LEDs are directly sealed in one advantageously black carrier plate are used and their connections in a suitable circuit board behind is soldered or freely wired.
  • a disadvantage of these simple embodiments is the need for lack need to use a particularly large number of LEDs in order to ensure precise lighting control
  • the recognizability of each individual LED especially with failures, as well as high phantom light, which by The LED is illuminated directly by the sun. It can by known means can not be eliminated because there is no parallel beam. But the depth is very small.
  • Patent application A 1623/97 also has a lens plate, on which a condenser is attached in front of each LED. At a greater distance in front of it is a conventional spreading disc. Between lens plate and Diffuser, the light is guided essentially in parallel, so that known Phantom light inserts can be used. The failure of some LEDs is caused by slight defocusing and a large distance between the lens plate and Cover screen veiled. The disadvantage is that the defocusing accordingly generates higher light losses in the phantom light inserts. For an effective Veiling, however, would require such a large distance that the use in would not fit an existing signal generator. Therefore in practice that is visual appearance is impaired, especially with partial assembly. The depth is kept as deep as possible.
  • This type of construction results in particular from the unfocused, blurred image the LED arrangement a homogeneous light distribution and excellent uniform appearance of the light signal, even if one or several LEDs.
  • this version can not meet too high brightness requirements because the light due to the size of the luminous surface and the blurred image shows a very large divergence despite the condenser lens.
  • the phantom light is also very high, because for the same reasons a lot of sunlight also shines on the LED arrangement falls.
  • the known ones phantom light-lowering devices cannot be used.
  • the housing as a heat sink. Since it is because of better heat dissipation as well as being colored black due to the reduction in phantom light, Solar radiation is heated accordingly, which increases the light output of the LED sinks. After all, the overall depth is relatively high.
  • Patent application A 488/99 shows one possibility Use of a lamella insert without a parallel beam.
  • the LEDs there are narrow limits for the arrangement of the LEDs, especially one low height. With such an arrangement, it is admittedly sufficiently low Phantom light achievable, but it is currently not possible to get higher light values because there are not enough LEDs lined up in the available space can be.
  • Another disadvantage is the limitations of the Front lens design regarding the position and the achievable light distribution. therefore there is also the risk of a slightly striped appearance. The Construction depth is greater than in the previous version because additional slats are to be accommodated.
  • there is also an inclined design of the optics which shows the phantom light generating reflections of the steps between the Avoids front lens elements.
  • the object of the invention is to provide an LED signal insert with a small overall depth develop, which also through the installation of phantom light-lowering agents can meet the highest phantom light classes and as little useful light as possible loses its light distribution as closely as possible to the distribution regulations is customizable and thus reaches the highest brightness level, as well as with a uniform visual appearance, even if some LED fails is not significantly affected.
  • each condenser preferably at least two LEDs in one at a distance of the focal length horizontal row are arranged, the light rays of which are captured by the condenser, largely parallel in accordance with the optical laws in vertical section appear directed and with a divergent light beam in the horizontal direction Generate main beam directions corresponding to the LED array.
  • sensor types with condenser optics have basically been in two groups divisible.
  • a group there is a condenser in front of each individual LED, which collects the light and can form a parallel light alignment, thus using conventional means a sufficiently low phantom light is achieved.
  • the achievable brightness is extremely large because of the parallelism of all light rays any other light distribution can also be achieved exactly.
  • one is disadvantageous certain recognizability of individual LEDs, especially in the case of partial assembly and LED failures, the appearance leaves a lot to be desired.
  • the LED is connected in such a way that in the event of a short circuit or Interruption by a single damaged LED in the affected LED in different rows and as far apart as possible, so that only one LED can fail at a time in each row.
  • Another requirement for a good appearance is that the condensers seamlessly adjoin and the same brightness as possible in all zones exhibit. This can be done within certain limits and in coordination with the existing light distribution of the LED by constructive measures optical laws such as a curved structure of the condenser, different wall thicknesses and widths of the individual Fresnel rings as well additional optical structures on the entrance or exit surface, which the horizontal Divergence of the main beam directions equalize or change.
  • optical laws such as a curved structure of the condenser, different wall thicknesses and widths of the individual Fresnel rings as well additional optical structures on the entrance or exit surface, which the horizontal Divergence of the main beam directions equalize or change.
  • dark gussets between the Condensers by trimming the edge area or moving individual ones Condenser positions can be avoided. These edge losses are at a higher one
  • the number of condensers is relatively smaller because there is a smaller proportion of the condensers is affected.
  • a signal transmitter can thus be produced that both a great brightness through a precisely adjusted light distribution as well Possibility to lower the phantom light and even after the failure of some LED still offers an acceptable appearance.
  • FIG. 1 a shows an embodiment of the invention in a sectional plan, 1b in a sectional elevation and Fig.1 c in side view, Fig. 2 a Version in vertical section.
  • a circuit board (1) On a circuit board (1) are LEDs (2) in the form of horizontal rows (3) in one Hexagonal grid arranged. This is a transparent condenser plate (4) which are completely identical condensers (5) in Fresnel construction are arranged at the distance of the focal lengths (F). The centers of the Condensers (5) are aligned with the center of the LED rows (3). The The diameter of the condensers (5) is selected so that the light beams (6) of the LED (2) are captured as completely as possible by the condensers (5).
  • the Focal distance (F) are the light beams (6) in the vertical section of the front view Aligned in parallel, in the horizontal direction (floor plan), the divergence results (D).
  • the condenser plate (4) In front of the condenser plate (4) there is a lamella grid with horizontal ones Slats (7). They are attached and dimensioned in such a way that they illuminate the useful light in a known manner to let through largely unhindered, but from diagonally above absorb incident sunlight on its black matt top.
  • the look is closed at the front by a diffuser (8), which is smooth on the outside and an arrangement of scattering elements (8a) on the inside to achieve this the prescribed light distribution.
  • the circuit board (1) seals on your Circumference (1a) with a housing edge (9a).
  • the side view shows that the Condensers (5) are cut off at the edge, so that the gusset (11) between neighboring condensers (5), which are inevitably somewhat darker, no longer attract attention.
  • the circuit board (1) has a heat-distributing and stabilizing support, for example an aluminum sheet, the back of which is exposed. There can be Improving heat dissipation and increasing light output Surface coating, a heat sink or a Peltier element attached become.
  • the printed circuit board (1) is connected to the housing (9) in any way, that it can be easily replaced in the event of a fault.
  • the housing (9) has a black matt surface on the inside, which absorbs incoming sunlight.
  • the case back covers with the openings (10) from the circuit board (1) completely, which shiny and reflective surfaces such as bare conductor tracks, solder pads, other components etc. can also have their heating by Prevents solar radiation, which improves light output and durability become.
  • each LED (2a, 2b, 2c) forms a row (3) through the condensers (5) a main beam direction (12a, 12b, 12c), whereby the entire divergence (D) is determined, there are only insignificant scattered light rays in between. On Therefore, uniform appearance is required from all observation directions also a minimum horizontal scatter of the windscreen (8), which shows the angular value (S) between adjacent main beam directions.
  • An LED failure for example (2a), causes the affected condenser (5) viewed from the corresponding main beam direction (12a), remains dark while it appears undiminished bright from the other directions of observation.
  • This Appearance can be countered by adding a substantial amount of light with a large number of lens elements (8a) evenly distributed over the front screen (8) at least by twice the angle of two neighboring main beam directions (2xS) is scattered, then the front screen (8) also shines at the relevant point Light from the adjacent LED (2b) off.
  • the described design has further design options, which are already described in patent application A 488/99 (Swarco-Futurit) and on the one hand increase the useful light, on the other hand lower the phantom light.
  • the lens group (13) is shown, which is immediately in front of each LED row (3) sits and the light radiation (6) of the LED (2) exactly on the associated condenser (5) votes.
  • Fig. 2 shows this inclination of the axis, which is usually by light
  • the LED rows (3) are moved upwards from the condenser center. This also causes the parallel light beams to tilt downwards.
  • the slats (7) have been realigned to the light path.
  • the scattered rays of light (14) show the usual range of light distribution.
  • the decentralized arrangement of the LED (2) on the circuit board (1) not only brings Space savings in the wiring, safety distances or heat dissipation, Above all, it also enables a flat design.
  • the condensers can have different sizes and focal lengths have, the number of LEDs per row can vary as well as some Condensers can also be one to realize different bright signaling devices or to incorporate an improvement in the brightness of the LED. Also one Mixing with other components such as sensors, power supply, Monitoring modules etc. can be carried out on the circuit board. It can too multiple circuit boards may be provided.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Led Device Packages (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
EP00890305A 1999-10-08 2000-10-09 Dispositif de signalisation avec rangées de diodes électroluminescentes Withdrawn EP1091167A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT171799 1999-10-08
AT0171799A AT410711B (de) 1999-10-08 1999-10-08 Signalgeberoptik mit led-reihen

Publications (2)

Publication Number Publication Date
EP1091167A2 true EP1091167A2 (fr) 2001-04-11
EP1091167A3 EP1091167A3 (fr) 2006-02-08

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP00890305A Withdrawn EP1091167A3 (fr) 1999-10-08 2000-10-09 Dispositif de signalisation avec rangées de diodes électroluminescentes

Country Status (2)

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EP (1) EP1091167A3 (fr)
AT (1) AT410711B (fr)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002029755A1 (fr) * 2000-10-05 2002-04-11 Power Signal Technologies, Inc. Appareil a feu de signalisation routiere dote d'un couvercle a semi-conducteurs solidaire
DE10216393A1 (de) * 2002-04-12 2003-10-30 Osram Opto Semiconductors Gmbh Leuchtdioden (LED)-Verkehrssignalgeber mit einer Lichtsignalschaltungsanordnung für Signallampen mit Haupt- und Nebenfaden
WO2003098574A1 (fr) * 2002-05-18 2003-11-27 Obshestvo S Ogranichennoi Otvetstvennostiu 'va Instruments' Dispositif de signalisation optique
WO2004001459A1 (fr) * 2002-06-21 2003-12-31 Stührenberg GmbH Elektrobau-Signaltechnik Optique de transmission de signaux comportant plusieurs sources lumineuses
DE10261183B3 (de) * 2002-12-20 2004-06-03 Daimlerchrysler Ag Fahrzeugscheinwerfer mit mehreren zu einem Array zusammengefassten LEDs.
WO2006027629A2 (fr) * 2004-09-07 2006-03-16 Set Europe Limited Systemes d'eclairage
DE102004007211B4 (de) * 2004-02-13 2006-09-07 Osram Opto Semiconductors Gmbh Signalgeber und Leuchtmittel
WO2006105646A1 (fr) * 2005-04-06 2006-10-12 Tir Systems Ltd. Module d'eclairage dote de composants optiques de melange et de collimation de couleurs
EP1836071A1 (fr) * 2004-12-30 2007-09-26 Gelcore LLC Signal de trafic ayant une surface lumineuse uniforme
US7800840B2 (en) 2008-09-10 2010-09-21 E-Pin Optical Industry Co., Ltd. Convex-fresnel LED lens and LED assembly thereof
WO2011104205A1 (fr) * 2010-02-24 2011-09-01 Siemens Aktiengesellschaft Indicateur de symbole
US8042975B2 (en) 2008-09-10 2011-10-25 E-Pin Optical Industry Co., Ltd. Plano-fresnel LED lens and LED assembly thereof
US8371714B2 (en) 2009-03-30 2013-02-12 Lan-Yang Investment Co., Ltd. Fresnel LED lens and LED assembly thereof
CN106931402A (zh) * 2016-12-14 2017-07-07 江西科技师范大学 一种led交通信号灯透镜面罩
CN110778934A (zh) * 2019-11-08 2020-02-11 平行现实（杭州）科技有限公司 一种基于一维衍射的超薄平行光源
CN115985121A (zh) * 2022-11-30 2023-04-18 昆山中亿丰光电科技有限公司 一种光栅式人行道信号灯装置及系统
US11869358B2 (en) 2021-10-29 2024-01-09 Nortak Software Ltd. System and method for warning of a presence of a mobile target

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US48899A (en) 1865-07-25 Improved car-platform-stake holder
US162397A (en) 1875-04-20 Improvement in ice
US5636057A (en) 1995-02-10 1997-06-03 Ecolux Inc. Prismatic toroidal lens and traffic signal light using this lens
WO1998016777A1 (fr) 1996-10-16 1998-04-23 Philips Electronics N.V. Lampe de signalisation a diodes electroluminescentes

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU8876998A (en) * 1997-09-04 1999-03-22 Howells Railway Products Limited Plural-led lights
EP0905439A3 (fr) * 1997-09-24 1999-12-01 SWARCO FUTURIT Verkehrssignalsysteme Ges.m.b.H. Indicateur optique de signaux à sources lumineuses multiples
EP1110027A1 (fr) * 1999-07-02 2001-06-27 Lumileds Lighting B.V. Eclairage et feux de signalisation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US48899A (en) 1865-07-25 Improved car-platform-stake holder
US162397A (en) 1875-04-20 Improvement in ice
US5636057A (en) 1995-02-10 1997-06-03 Ecolux Inc. Prismatic toroidal lens and traffic signal light using this lens
WO1998016777A1 (fr) 1996-10-16 1998-04-23 Philips Electronics N.V. Lampe de signalisation a diodes electroluminescentes

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6439743B1 (en) 2000-10-05 2002-08-27 Power Signal Technologies Inc. Solid state traffic light apparatus having a cover including an integral lens
WO2002029755A1 (fr) * 2000-10-05 2002-04-11 Power Signal Technologies, Inc. Appareil a feu de signalisation routiere dote d'un couvercle a semi-conducteurs solidaire
DE10216393A1 (de) * 2002-04-12 2003-10-30 Osram Opto Semiconductors Gmbh Leuchtdioden (LED)-Verkehrssignalgeber mit einer Lichtsignalschaltungsanordnung für Signallampen mit Haupt- und Nebenfaden
DE10216393B4 (de) * 2002-04-12 2009-03-05 Osram Opto Semiconductors Gmbh Leuchtdioden (LED)-Verkehrssignalgeber mit einer Lichtsignalschaltungsanordnung für Signallampen mit Haupt- und Nebenfaden
WO2003098574A1 (fr) * 2002-05-18 2003-11-27 Obshestvo S Ogranichennoi Otvetstvennostiu 'va Instruments' Dispositif de signalisation optique
WO2004001459A1 (fr) * 2002-06-21 2003-12-31 Stührenberg GmbH Elektrobau-Signaltechnik Optique de transmission de signaux comportant plusieurs sources lumineuses
DE10261183B3 (de) * 2002-12-20 2004-06-03 Daimlerchrysler Ag Fahrzeugscheinwerfer mit mehreren zu einem Array zusammengefassten LEDs.
DE102004007211B4 (de) * 2004-02-13 2006-09-07 Osram Opto Semiconductors Gmbh Signalgeber und Leuchtmittel
JP2008512827A (ja) * 2004-09-07 2008-04-24 セット ヨーロッパ リミテッド 照明システム
WO2006027629A2 (fr) * 2004-09-07 2006-03-16 Set Europe Limited Systemes d'eclairage
WO2006027629A3 (fr) * 2004-09-07 2007-04-12 Set Europ Ltd Systemes d'eclairage
EP1836071A1 (fr) * 2004-12-30 2007-09-26 Gelcore LLC Signal de trafic ayant une surface lumineuse uniforme
EP1836071A4 (fr) * 2004-12-30 2009-06-24 Lumination Llc Signal de trafic ayant une surface lumineuse uniforme
US9291329B2 (en) 2004-12-30 2016-03-22 GE Lighting Solutions, LLC Traffic signal having a uniform light surface
WO2006105646A1 (fr) * 2005-04-06 2006-10-12 Tir Systems Ltd. Module d'eclairage dote de composants optiques de melange et de collimation de couleurs
US7800840B2 (en) 2008-09-10 2010-09-21 E-Pin Optical Industry Co., Ltd. Convex-fresnel LED lens and LED assembly thereof
US8042975B2 (en) 2008-09-10 2011-10-25 E-Pin Optical Industry Co., Ltd. Plano-fresnel LED lens and LED assembly thereof
US8371714B2 (en) 2009-03-30 2013-02-12 Lan-Yang Investment Co., Ltd. Fresnel LED lens and LED assembly thereof
WO2011104205A1 (fr) * 2010-02-24 2011-09-01 Siemens Aktiengesellschaft Indicateur de symbole
CN106931402A (zh) * 2016-12-14 2017-07-07 江西科技师范大学 一种led交通信号灯透镜面罩
CN110778934A (zh) * 2019-11-08 2020-02-11 平行现实（杭州）科技有限公司 一种基于一维衍射的超薄平行光源
US11869358B2 (en) 2021-10-29 2024-01-09 Nortak Software Ltd. System and method for warning of a presence of a mobile target
CN115985121A (zh) * 2022-11-30 2023-04-18 昆山中亿丰光电科技有限公司 一种光栅式人行道信号灯装置及系统

Also Published As

Publication number Publication date
AT410711B (de) 2003-07-25
EP1091167A3 (fr) 2006-02-08
ATA171799A (de) 2002-11-15

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