EP1535820B1 - Lichtsignal - Google Patents

Lichtsignal Download PDF

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Publication number
EP1535820B1
EP1535820B1 EP04090430A EP04090430A EP1535820B1 EP 1535820 B1 EP1535820 B1 EP 1535820B1 EP 04090430 A EP04090430 A EP 04090430A EP 04090430 A EP04090430 A EP 04090430A EP 1535820 B1 EP1535820 B1 EP 1535820B1
Authority
EP
European Patent Office
Prior art keywords
led
light
optics
field
light 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.)
Expired - Lifetime
Application number
EP04090430A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1535820A3 (de
EP1535820A2 (de
Inventor
Wolfgang Ernst
Alexander Otto
Norbert PÖPPLOW
Harald Walter
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 AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 AG, Siemens Corp filed Critical Siemens AG
Priority to SI200430340T priority Critical patent/SI1535820T1/sl
Priority to PL04090430T priority patent/PL1535820T3/pl
Publication of EP1535820A2 publication Critical patent/EP1535820A2/de
Publication of EP1535820A3 publication Critical patent/EP1535820A3/de
Application granted granted Critical
Publication of EP1535820B1 publication Critical patent/EP1535820B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B61L5/1845—Optical systems, lenses
    • 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]

Definitions

  • the invention relates to a light signal with LED modules according to the preamble of claim 1.
  • Illuminated or light signals based on LED (light-emitting diodes) instead of incandescent lamps are increasingly used in many areas, especially in railway signaling.
  • LEDs are comparatively inexpensive, durable and bright.
  • the following explanations essentially relate to the far-range and short-range representation of signal terms in rail-bound traffic routes, without the claimed inventive subject matter being restricted to this application.
  • Known LED light signals consist essentially of a grid-like arrangement of LED, which are each equipped with a reflector, wherein optionally additionally at least one light-bundling optical element and a front screen are provided.
  • the light distribution in particular with regard to the near and far areas, is often unsatisfactory.
  • the invention has for its object to provide a light signal of the generic type, which has an optimal radiation characteristics. It is desirable, for different attachment and observation points, curve radii of the rail and detection distances a single emission to realize in order to enable universal usability of the light signal.
  • the object is achieved with the characterizing features of claim 1.
  • the desired radiation characteristics for near and far range results from the assignment of multiple LED to a bundling optics, wherein at least one short-range LED cooperates with a light guide, which directs the LED light in the vicinity of the exit surface of the optics, where it is relatively disordered before everything exits sideways and down.
  • the light distribution in the near range can be influenced by the surface and edge design of the light guide.
  • a change in the distribution characteristic, which primarily affects the far field, is possible by changing the surface geometry of the light exit surface of the optics.
  • four LED are provided per LED module, which can be blacked by the arrangement of the lower region of the optic sun-absorbing.
  • four standard LEDs are used in SMD construction. The LEDs do not have to be operated at the upper limit of their power range, so that a longer service life is to be expected.
  • the SMD design can also be implemented in modern chip-on-board technology. In this way, several compatible technologies are available for different LED designs, thereby improving product availability.
  • the far-end area needs about the same amount of light as the near-end area. Therefore, four similar LED's can be used, namely two for the far range and two for the near range.
  • the four LEDs can be interconnected differently depending on the desired safety concepts with regard to the LED failures.
  • a suitable solution is, for example, a series connection of the four LEDs, but other interconnections are conceivable.
  • the incident on the exit surface of the optic sunlight is directed completely from a position of the sun of 10 ° and higher on the absorption surface of the optics.
  • the only disturbing factor is the slight surface reflection at the exit surface. It is particularly advantageous that no sunlight passes directly into the LED, so that the dreaded effect that the LEDs are excited by the sunlight to shine, does not occur. Only with even lower sun position and frontal irradiation can a small part of the sunlight penetrate to the LED. But even then, the active LED modules appear much brighter than the reflected sunlight.
  • the useful light of the LED goes through the optics virtually unhindered. As a result, the light efficiency is so good that even with a light output of 0.2 watts per LED module sufficient light distribution can be achieved.
  • the preferred SMD LED have no conventional reflectors, their reflectivity is lower than in the conventional LED, which have a specular reflector.
  • a black matt surface can be formed around the individual LED chip by means of Chop-On-Board technology.
  • the light signal is set up several meters above the ground with approximately horizontal radiation direction.
  • the optics When mounted on the ground with the direction of radiation still up, the optics would produce extreme phantom light, as the light output and solar radiation could collapse.
  • the existing optics can be mounted upside down. This again results in a phantomlichtarme arrangement.
  • direct orientation of the signal to the signal could be prevented by suitable orientation of the light signal during ground mounting and / or by shading.
  • the optics is housed in a housing, which is advantageously used sealingly in the vicinity of the light exit surface in a matrix plate and light entry side has snap elements, in which an LED-mounted board is almost snapped.
  • the four LEDs on the board can be energized via two connection wires, which are connected to other LED modules via a multiple plug with an associated power source.
  • the LED board can be glued into a small plastic housing, which forms a lens over each of the four LEDs, if the LED itself has no lens or optics. This is especially the case with SMD construction.
  • the lenses focus the light and increase the light efficiency.
  • a dowel may be provided, wherein the optical housing is crimped by pressing into the matrix plate plastically-elastic and this causes a good seal.
  • the LEDs are connected according to claim 4 with devices for air cooling. Temperature has the biggest impact on the life of an LED.
  • the power limit values are limited by the maximum permissible temperature of the internal LED components and the heat loss generated during operation. On the one hand, the internal heat flow between the LED components determines the maximum possible limit load of an LED; On the other hand, the heat must be able to be dissipated outside the LED. Good heat dissipation also lowers the temperature level inside the LED and increases the service life accordingly.
  • the life of the LED decreases rapidly due to overheating. But even if the values are very much undercut, the service life can be impaired because internal processes do not proceed as intended.
  • An optimum in terms of light output, utilization and service life is somewhat below the recommended nominal values in an operating state. Under such conditions - in contrast to the incandescent lamp - the relative luminous efficacy, ie. H. the brightness of each power unit used.
  • An essential component of a light signal is the circuit board 2 shown in FIG. 1 and equipped with four LEDs 1a, 1b, 1c and 1d.
  • the energization of the LEDs 1a, 1b, 1c and 1d takes place via two connection wires 3a and 3b.
  • the two upper LEDs 1a and 1b are connected on the light exit side to optical fibers 4a and 4b of an optical system 5 illustrated in FIG.
  • the two approximately centrally arranged on the board 2 LED 1c and 1d emit their light on the upper part of a lens body 6 of the optics 5.
  • the lower part of the lens body 6 is provided both light inlet side and shell side with an absorption surface 7 for sunlight.
  • Figure 3 shows the LED board 2 in the assembled state.
  • the optic 5 is housed in a housing 8, which is sealingly pressed close to the light exit surface of the optic 5 in a matrix plate 9 and has rear locking elements for inserting the LED board 2.
  • the LED 1a. 1b. 1c, 1d are equipped with front lenses 11 for pre-focusing the LED light and that the LED board 2 is connected to the heat dissipation with a rib-shaped heat sink 12.
  • the light of the upper LED 1a and 1b, which is radiated into the light guides 4a and 4b, is thereby scattered relatively wide, in particular downwards and to the side, so that an optimal recognizability of the signal term results in the near range.
  • Some short-range beams are labeled 13.
  • beams 14 which result essentially from the light of the LEDs 1c and 1d are produced by the lens body 6.
  • Incident sunlight 15 is directed above a sun's position of 10 ° above the horizon through the optics 5 completely on the absorption surface 7 that phantom light can not occur.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Silicon Polymers (AREA)
  • Cookers (AREA)
  • Details Of Television Scanning (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Traffic Control Systems (AREA)
  • Led Device Packages (AREA)
  • Gyroscopes (AREA)
  • Audible And Visible Signals (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
EP04090430A 2003-11-25 2004-11-12 Lichtsignal Expired - Lifetime EP1535820B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SI200430340T SI1535820T1 (sl) 2003-11-25 2004-11-12 Svetlobni signal
PL04090430T PL1535820T3 (pl) 2003-11-25 2004-11-12 Sygnał świetlny

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10355878A DE10355878B3 (de) 2003-11-25 2003-11-25 Lichtsignal
DE10355878 2003-11-25

Publications (3)

Publication Number Publication Date
EP1535820A2 EP1535820A2 (de) 2005-06-01
EP1535820A3 EP1535820A3 (de) 2006-06-07
EP1535820B1 true EP1535820B1 (de) 2007-03-21

Family

ID=34442359

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04090430A Expired - Lifetime EP1535820B1 (de) 2003-11-25 2004-11-12 Lichtsignal

Country Status (8)

Country Link
EP (1) EP1535820B1 (pl)
AT (1) ATE357362T1 (pl)
DE (2) DE10355878B3 (pl)
DK (1) DK1535820T3 (pl)
ES (1) ES2281751T3 (pl)
PL (1) PL1535820T3 (pl)
PT (1) PT1535820E (pl)
SI (1) SI1535820T1 (pl)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2488401B2 (en) † 2009-10-16 2017-07-12 Solari Di Udine Spa Led-type luminous signaling device and relative control method

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010024381A1 (de) * 2010-06-16 2011-12-22 Siemens Aktiengesellschaft Lichtsignal
EP3480078B1 (de) * 2017-11-07 2021-06-30 Siemens Mobility AG Lichtsignal und verfahren zur anzeige von signalbegriffen für einen verkehrsweg

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB502980A (en) * 1937-10-13 1939-03-29 James Boot Improvements in colour-light signals
DE930593C (de) * 1949-07-29 1955-07-21 Westinghouse Brake & Signal Einrichtung zur Erzeugung eines Lichtbuendels
ATA174989A (de) * 1989-07-20 1999-06-15 Zelisko Josef Elektro Masch Signalanordnung mit einem strahler
US5833355A (en) * 1996-12-06 1998-11-10 Dialight Corporation Led illuminated lamp assembly
DE29706646U1 (de) * 1997-04-14 1997-10-09 Zentrum für Sonnenenergie- und Wasserstoff-Forschung Baden-Württemberg(ZSW), 70565 Stuttgart Lichtquelle
DE19922361C2 (de) * 1999-05-14 2003-05-28 Osram Opto Semiconductors Gmbh LED-Modul für Anzeigeeinrichtungen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2488401B2 (en) † 2009-10-16 2017-07-12 Solari Di Udine Spa Led-type luminous signaling device and relative control method

Also Published As

Publication number Publication date
PL1535820T3 (pl) 2007-08-31
DK1535820T3 (da) 2007-07-30
SI1535820T1 (sl) 2007-08-31
EP1535820A3 (de) 2006-06-07
PT1535820E (pt) 2007-04-30
ES2281751T3 (es) 2007-10-01
ATE357362T1 (de) 2007-04-15
EP1535820A2 (de) 2005-06-01
DE502004003268D1 (de) 2007-05-03
DE10355878B3 (de) 2005-08-25

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