EP0713999A1 - Dispositif de signaux lumineux à diodes électroluminescentes - Google Patents

Dispositif de signaux lumineux à diodes électroluminescentes Download PDF

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Publication number
EP0713999A1
EP0713999A1 EP95810729A EP95810729A EP0713999A1 EP 0713999 A1 EP0713999 A1 EP 0713999A1 EP 95810729 A EP95810729 A EP 95810729A EP 95810729 A EP95810729 A EP 95810729A EP 0713999 A1 EP0713999 A1 EP 0713999A1
Authority
EP
European Patent Office
Prior art keywords
light
emitting diodes
ledg
ledb
signal
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.)
Ceased
Application number
EP95810729A
Other languages
German (de)
English (en)
Inventor
Alexander Beck
Arthur Windisch
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.)
Siemens Schweiz AG
Original Assignee
Siemens Integra Verkehrstechnik AG
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 Siemens Integra Verkehrstechnik AG filed Critical Siemens Integra Verkehrstechnik AG
Publication of EP0713999A1 publication Critical patent/EP0713999A1/fr
Ceased 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L5/00—Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
    • B61L5/12—Visible signals
    • B61L5/18—Light signals; Mechanisms associated therewith, e.g. blinders
    • B61L5/1809—Daylight signals
    • B61L5/1827—Daylight signals using light sources of different colours and a common optical system
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L2207/00—Features of light signals
    • B61L2207/02—Features of light signals using light-emitting diodes [LEDs]
    • 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 device according to the preamble of patent claim 1.
  • Light signal devices known from traffic technology often consist of a signal board which is provided with one or more signal lights. Three signal lights are often combined, which are used to emit light signals of different colors, e.g. red, yellow and green.
  • a bright color shows three mutually independent sensation qualities, the first as hue (hue), the second as saturation (chroma) and the third as brightness .
  • color mood which is based on the color prevailing in the visual field, which may can be determined by several colors appearing side by side.
  • the transition from a first to a second color change is referred to as color change.
  • Signal lamps usually consist of an incandescent lamp arranged in a housing, the light of which is emitted via a lens system and a colored disk.
  • the color disc is chosen depending on the wavelength of the light to be emitted and the emission spectrum of the incandescent lamp, which decreases continuously towards blue.
  • the wavelengths of the signal colors are chosen so that they can always be easily distinguished from one another.
  • the distinctive character of the signal colors should be guaranteed, especially in poor visibility conditions, when there is a haze, fog or smoke, which usually causes wavelength-dependent light absorption.
  • the main disadvantage of these signal lights is the high maintenance costs, which are caused in particular by the short life of the light bulbs.
  • the use of incandescent lamp signals only allows the use of a small area of the standardized color locus due to the existing emission spectra, especially when the radiation power is reduced at night. Furthermore, these signal colors are usually only slightly saturated.
  • the color location for the signal color green for traffic signals is also specified in the standards DIN 6163 / Part 4 or DIN 6163 / Part 5.
  • the uniform color location and wavelength assignment to the signal colors green, red and yellow prevents misinterpretations that can easily arise if different colors are used for individual signal colors. This is particularly true if, for example, many signal lights are arranged close to each other in a train station.
  • LED light-emitting diodes
  • green light emitting diodes work relatively narrow-band (according to the manufacturer's information, the green light emitting diode of type BG5007S from Stanley has a half width of 30 nm) dominant in the wavelength range from 550 nm to 565 nm. In unfavorable visibility conditions, their light is of yellow light, that in the wavelength range of about 589 nm to 595 nm (standardized signal color yellow) lies, only insufficiently distinguishable.
  • This green also differs from green light, which e.g. is emitted by thermal jets provided in a station area. As a result, disturbing interferences arise. This also makes color changes necessary, which should be avoided for safety reasons.
  • the wavelength of the radiation emitted by light-emitting diodes is essentially determined by the manufacturing materials used and the manufacturing process. In O. Neufang, Fundamentals of Optoelectronics, AT Verlag, Aarau 1982, page 36, Figure 3.6, the wavelengths assigned to the semiconductor materials used are specified. It can be seen from this that the radiation emitted by the various light-emitting diodes only covers the wavelength range of visible light in zones. Light emitting diodes that dominate in the color range standardized for the signal color green or shine with sufficient power are not available.
  • the present invention is therefore based on the object of providing an inexpensive light-signaling device provided with light-emitting diodes, which is provided for emitting green light and which is easily distinguishable from the signal color yellow. This object is achieved by the measures specified in the characterizing part of patent claim 1. Advantageous embodiments of the invention are specified in further claims.
  • Light signal devices according to the invention meet the high requirements for safety and reliability that have to be observed in traffic engineering. They can also be produced practically without additional effort and have hardly any maintenance and maintenance costs, as well as a high life expectancy and good efficiency. In addition to the required differentiation with regard to yellow light, there is also a sufficient correspondence with the green light of thermal radiators, thereby avoiding undesirable color changes. This also prevents disturbing interferences with the signals from thematic beams.
  • Fig. 1 shows the front window of a signal lamp, which is equipped with LEDs LEDg, LEDb.
  • the signal lamp which is part of a light signal device, not shown, is provided for emitting the signal color green.
  • the signal lamp partially shown in Fig. 1 is therefore with commercially available green light diodes LEDg e.g. of the type BG5007S mentioned above.
  • light sources are provided which are suitable, together with the green light diodes LEDg, for generating a green light which has the desired distinguishability from yellow light.
  • the use of blue light diodes, which emit light predominantly in the range from 460 nm to 490 nm (according to the Optoelectronic Designers Catalog, No.
  • the desired radiation in the standardized color range is only achieved when a number n of green light diodes with an efficiency of x is mixed with approximately a number 3 * n blue light diodes which have an efficiency of x / 10.
  • the resulting ratio of the radiation powers of green light and blue light would therefore be about 3.33: 1.
  • Signal lights with the specified ratio of green and blue light diodes would therefore have a poor overall efficiency and, given the normally limited size of the signal lights, would have too low a radiation power.
  • the relatively large number of blue light diodes could cause problems regarding the recognizability of the signal if it is viewed from different angles and distances.
  • the resulting color at the above-mentioned mixing ratio would also be highly desaturated.
  • a * n second light-emitting diodes LEDb, which have an efficiency y, are provided for n first light-emitting diodes LEDg, which have an efficiency x.
  • the value of a becomes selected in the range from x / (10 * y) to x / (8 * y).
  • all LEDs LEDg, LEDb are operated with the same voltage.
  • the ratio of the light emitting diodes LEDg and LEDb is selected as follows.
  • b * m second light-emitting diodes LEDb are provided, which emit a radiation power w due to the existing efficiency and the electrical power supplied.
  • the value of b is chosen in the range from v / (10 * w) to v / (8 * w).
  • the green light generated is always perceived with the same color regardless of the viewing angle. This is done by dividing the front screen into segments (usually circular segments) in which the differently colored light-emitting diodes LEDg, LEDb are alternately strung together. An even number of circle segments is preferably selected, of which the first half is equipped with green light and the second half with blue light diodes LEDg, LEDb. A segment of the first half is arranged adjacent to a segment of the second half.
  • the rows of light-emitting diodes preferably run outward in an approximately radiating manner from the center of the windshield.
  • the (concentric) at least approximately radiating arrangement of rows of light-emitting diodes can also be used advantageously without prior segmentation.
  • the mixing ratio and the arrangement of the light emitting diodes LEDg, LEDb are preferably adapted to the needs of the viewer as a function of the viewing angle.
  • a desired wavelength-dependent radiation characteristic of the signal light is advantageously also achieved by appropriately selecting the height of the green light diodes LEDg relative to the height of the blue light diodes LEDb in relation to the height of the windshield. If the wavelength of the green light is to be shifted only within a small radiation angle, the blue light diodes LEDb can be set back or completely recessed in the front window FS (see FIG. 2). This can e.g. prevent an excessive blue component from being perceived in the vicinity of the signal lamp.
  • the desired radiation emission of the individual diodes can also be set by a correspondingly adapted supply of electrical power as desired.
  • the radiation angle of the individual light-emitting diodes LEDg, LEDb can also be selected accordingly.
  • Serving for this purpose reflectors can be created, for example, by recesses in the windshield in the form of bodies of revolution.
  • the wavelength range of the emitted radiation can also be selected as a function of the radiation angle. Due to the determined environmental conditions, e.g. it is desired that the radiation is given to road users who are in the vicinity of the light signal device with a lower proportion of blue. In addition, the normally different emission characteristics of the LEDs LEDg and LEDb can be compensated.
  • Fig. 2 shows a device for mounting the light emitting diodes LEDg or LEDb.
  • the device has a circuit board SP provided with electrical connections, which is connected to a base plate GP which has openings GPO for the passage of the connecting wires AD of the light-emitting diodes LEDg or LEDb.
  • First spacer elements DEa are provided between the plates SP and GP, are guided through the fastening screws SWa and are screwed to second spacer elements DEb.
  • the circuit board SP and the base plate GP are pressed and fixed on both sides to the first spacer elements DEa by the fastening screws SWa and the second spacer elements DEb.
  • the second spacer elements DEb which therefore also serve as screw nuts, preferably have a continuous thread, so that screws SWa, SWb can be screwed in from both sides.
  • the base plate GP can also be connected on the side facing away from the circuit board SP to a front window FS which has openings FSOb, FSOg for the mounted light-emitting diodes LEDg, LEDb.
  • the light-emitting diode LEDb shown on the left in FIG. 2 is also displaced to the rear relative to the other light-emitting diode LEDg or is sunk into the front window FS.
  • the base plate GP is provided with a recess GPV, within which the light-emitting diode LEDb is held by a sleeve FSH connected to the front pane FS. Due to this relative displacement of the light-emitting diodes LEDg, LEDb, the green light diode LEDg has a significantly larger radiation angle than for the blue light diode LEDb.
  • connection wires AD of the light-emitting diodes LEDg, LEDb are therefore passed through the openings GPO in the base plate GP and through contact openings in the circuit board SP until the connection plate AP of the diode body rests on the base plate GP.
  • the connecting wires AD are then soldered to the connections provided on the circuit board SP.
  • the front pane FS is connected to the base plate GP in such a way that the diode bodies ZK protrude into the openings FSO.
  • the connection plate AP of the diode body is thereby held between the base plate GP and the front window FS.
  • the height of the second spacer elements DEb is chosen to be the same or only slightly larger than the height of the connection plate AP. This prevents an impermissibly high pressure being exerted on the connection plate AP.
  • the windshield FS can then be mounted without problems, for example using the screws SWb, which are inserted into the spacer element DEb.
  • the base plate GP or the front pane FS is preferably provided with an elastic on the side facing the connection plate AP Covering ES covered. This avoids punctual pressure points on the connection plate AP, which could lead to the destruction of the light-emitting diode, for example, if temperature expansions occur.
  • the device shown in Fig. 2 therefore allows quick assembly and reliable attachment of the light emitting diodes LEDg, LEDb.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Led Device Packages (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
EP95810729A 1994-11-24 1995-11-22 Dispositif de signaux lumineux à diodes électroluminescentes Ceased EP0713999A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH354194 1994-11-24
CH3541/94 1994-11-24

Publications (1)

Publication Number Publication Date
EP0713999A1 true EP0713999A1 (fr) 1996-05-29

Family

ID=4258214

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95810729A Ceased EP0713999A1 (fr) 1994-11-24 1995-11-22 Dispositif de signaux lumineux à diodes électroluminescentes

Country Status (1)

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EP (1) EP0713999A1 (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998016777A1 (fr) * 1996-10-16 1998-04-23 Philips Electronics N.V. Lampe de signalisation a diodes electroluminescentes
EP0853302A1 (fr) * 1996-11-18 1998-07-15 Garufo GmbH Appareils de signalisation lumineux à diodes électroluminescentes
EP0930601A2 (fr) * 1998-01-20 1999-07-21 InfoSystems GmbH, Visuelle und akustische Systeme für die Verkehrstechnik Methode de fabrication d'un dispositif d'affichage à matrices de points
DE29806589U1 (de) * 1998-04-15 1999-09-02 Pfannenberg Otto Gmbh Signalleuchte
EP0984220A1 (fr) * 1998-09-03 2000-03-08 Valeo Vision Système de signalisation multi-fonction ayant un voyant éclairé uniformément
GB2356694A (en) * 1999-11-26 2001-05-30 Dorman Traffic Products Ltd Signal apparatus comprising individual light units each capable of emitting more than one colour of light
EP1286321A1 (fr) * 2001-08-20 2003-02-26 Lin; Fong-Jei Feu de circulation avec plusieurs sources d'illumination DEL
DE19641980C5 (de) * 1996-10-11 2004-08-26 Hans-Dieter Wustlich Auf der Basis von Leuchtdioden-Chips arbeitende Weißlichtquelle mit nur zwei unterschiedliche Farben emitierenden Leuchtdioden-Chips
EP1466805A1 (fr) * 2003-04-08 2004-10-13 Elettromeccanica CM S.r.l. Signal lumineux ferroviare pour manoeuvres
EP2123972A1 (fr) * 2008-05-21 2009-11-25 Advanced Optoelectronic Technology Inc. Lampadaire à diode électroluminescente doté d'une lampe auxiliaire
CN105390594A (zh) * 2015-10-30 2016-03-09 东莞市光宇实业有限公司 一种蓝光led灯体及其点胶工艺
EP3296182A1 (fr) * 2016-09-19 2018-03-21 PINTSCH BAMAG Antriebs- und Verkehrstechnik GmbH Fanal de signalisation à led

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD154050A1 (de) * 1980-07-11 1982-02-17 Richard Schimko Verfahren zur herstellung von lichtemitterdioden
DE3132594A1 (de) * 1981-08-18 1983-03-10 Siemens AG, 1000 Berlin und 8000 München Leuchtdioden-baustein und damit ausgeruestet signalleuchten.
FR2588109A1 (fr) * 1985-10-02 1987-04-03 Valancogne Pierre Dispositif de signalisation lumineuse
DE3722578A1 (de) * 1986-07-08 1988-01-21 Nystrom Karl G Elektrische lampeneinheit fuer verkehrssignalleuchten oder andere aehnliche lichtsignaleinrichtungen
FR2613858A1 (fr) * 1987-04-09 1988-10-14 Garbarini Sa A Element de feu de signalisation de circulation routiere
JPH05101298A (ja) * 1991-10-07 1993-04-23 Nippon T M I:Kk 交通信号機
WO1994015368A1 (fr) * 1992-12-29 1994-07-07 Rijksuniversiteit Te Groningen Diode electroluminescente accordable a base de copolymeres en blocs multiples, polymeres associes et oligomeres

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD154050A1 (de) * 1980-07-11 1982-02-17 Richard Schimko Verfahren zur herstellung von lichtemitterdioden
DE3132594A1 (de) * 1981-08-18 1983-03-10 Siemens AG, 1000 Berlin und 8000 München Leuchtdioden-baustein und damit ausgeruestet signalleuchten.
FR2588109A1 (fr) * 1985-10-02 1987-04-03 Valancogne Pierre Dispositif de signalisation lumineuse
DE3722578A1 (de) * 1986-07-08 1988-01-21 Nystrom Karl G Elektrische lampeneinheit fuer verkehrssignalleuchten oder andere aehnliche lichtsignaleinrichtungen
FR2613858A1 (fr) * 1987-04-09 1988-10-14 Garbarini Sa A Element de feu de signalisation de circulation routiere
JPH05101298A (ja) * 1991-10-07 1993-04-23 Nippon T M I:Kk 交通信号機
WO1994015368A1 (fr) * 1992-12-29 1994-07-07 Rijksuniversiteit Te Groningen Diode electroluminescente accordable a base de copolymeres en blocs multiples, polymeres associes et oligomeres

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 17, no. 454 (P - 1596) 19 August 1993 (1993-08-19) *

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19641980C5 (de) * 1996-10-11 2004-08-26 Hans-Dieter Wustlich Auf der Basis von Leuchtdioden-Chips arbeitende Weißlichtquelle mit nur zwei unterschiedliche Farben emitierenden Leuchtdioden-Chips
WO1998016777A1 (fr) * 1996-10-16 1998-04-23 Philips Electronics N.V. Lampe de signalisation a diodes electroluminescentes
EP0853302A1 (fr) * 1996-11-18 1998-07-15 Garufo GmbH Appareils de signalisation lumineux à diodes électroluminescentes
EP0930601A3 (fr) * 1998-01-20 2000-05-10 InfoSystems GmbH, Visuelle und akustische Systeme für die Verkehrstechnik Methode de fabrication d'un dispositif d'affichage à matrices de points
EP0930601A2 (fr) * 1998-01-20 1999-07-21 InfoSystems GmbH, Visuelle und akustische Systeme für die Verkehrstechnik Methode de fabrication d'un dispositif d'affichage à matrices de points
DE29806589U1 (de) * 1998-04-15 1999-09-02 Pfannenberg Otto Gmbh Signalleuchte
EP0984220A1 (fr) * 1998-09-03 2000-03-08 Valeo Vision Système de signalisation multi-fonction ayant un voyant éclairé uniformément
GB2356694A (en) * 1999-11-26 2001-05-30 Dorman Traffic Products Ltd Signal apparatus comprising individual light units each capable of emitting more than one colour of light
GB2356694B (en) * 1999-11-26 2004-01-21 Dorman Traffic Products Ltd Signal apparatus
EP1286321A1 (fr) * 2001-08-20 2003-02-26 Lin; Fong-Jei Feu de circulation avec plusieurs sources d'illumination DEL
EP1466805A1 (fr) * 2003-04-08 2004-10-13 Elettromeccanica CM S.r.l. Signal lumineux ferroviare pour manoeuvres
EP2123972A1 (fr) * 2008-05-21 2009-11-25 Advanced Optoelectronic Technology Inc. Lampadaire à diode électroluminescente doté d'une lampe auxiliaire
CN105390594A (zh) * 2015-10-30 2016-03-09 东莞市光宇实业有限公司 一种蓝光led灯体及其点胶工艺
EP3296182A1 (fr) * 2016-09-19 2018-03-21 PINTSCH BAMAG Antriebs- und Verkehrstechnik GmbH Fanal de signalisation à led

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