EP2473777A1 - Lichtsignal - Google Patents

Lichtsignal

Info

Publication number
EP2473777A1
EP2473777A1 EP10739567A EP10739567A EP2473777A1 EP 2473777 A1 EP2473777 A1 EP 2473777A1 EP 10739567 A EP10739567 A EP 10739567A EP 10739567 A EP10739567 A EP 10739567A EP 2473777 A1 EP2473777 A1 EP 2473777A1
Authority
EP
European Patent Office
Prior art keywords
light source
signal
white
color filter
point light
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
EP10739567A
Other languages
English (en)
French (fr)
Other versions
EP2473777B1 (de
Inventor
Rolf Eckl
Jörg BIRKHOLZ
Uwe Frost
Kay Köster
Zeljko Marincic
Norbert PÖPPLOW
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 Mobility GmbH
Original Assignee
Siemens 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 AG filed Critical Siemens AG
Publication of EP2473777A1 publication Critical patent/EP2473777A1/de
Application granted granted Critical
Publication of EP2473777B1 publication Critical patent/EP2473777B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/08—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for producing coloured light, e.g. monochromatic; for reducing intensity of light
    • 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
    • B61L5/1818—Daylight signals using mobile coloured screen
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S10/00—Lighting devices or systems producing a varying lighting effect
    • F21S10/007—Lighting devices or systems producing a varying lighting effect using rotating transparent or colored disks, e.g. gobo wheels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/08—Lighting devices intended for fixed installation with a standard
    • F21S8/085—Lighting devices intended for fixed installation with a standard of high-built type, e.g. street light
    • F21S8/086—Lighting devices intended for fixed installation with a standard of high-built type, e.g. street light with lighting device attached sideways of the standard, e.g. for roads and highways
    • 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
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/006—Controlling the distribution of the light emitted by adjustment of elements by means of optical elements, e.g. films, filters or screens, being rolled up around a roller
    • 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
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/40—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters with provision for controlling spectral properties, e.g. colour, or intensity
    • 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
    • F21Y2101/00—Point-like light sources
    • 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 invention relates to a light signal with a semiconductor light source and collection optics for displaying signal terms, in particular in the case of rail-bound traffic routes.
  • the following explanations relate essentially to illuminated signs or light signals for the representation of signal terms in rail-bound traffic routes, without the claimed inventive subject matter being restricted to this application.
  • a filament arrangement of an incandescent lamp 1 or a semiconductor light source 2 is used as the light source.
  • the filament light signal consists essentially of the incandescent lamp 1 and an optical system with full lens 3 or step lens 4 and a color filter glass 5 for the realization of the usual signal colors, in particular red, green and yellow.
  • the semiconductor light sources 2 illustrated on the right in FIG. 1 for example LEDs - light-emitting diodes - the light is generated by electrical excitation of a semiconductor.
  • LEDs 7 are used, which are already provided with lens optics.
  • These LEDs 7 and opteless LEDs 7.1 must be designed as monochrome LEDs with narrow color locus limits in order to permanently generate the signal-specific light color. In addition to color fidelity, a minimum axis light intensity must also be achieved. problematic Moreover, in the case of monochrome LEDs 7, 7.1, the necessary availability, the storage of a plurality of LED types as well as their manufacturer dependency is. In addition, the LED lighting for the same brightness is color-dependent, so that signal generators with different driver modules are required. The safety proofs for signalers are therefore very expensive.
  • the invention has for its object to simplify a light signal of the generic type, in particular the
  • Type diversity of the necessary semiconductor light sources is to reduce.
  • the object is achieved in that the semiconductor light source is designed as a white point light source, wherein in the aperture region of the point light source a signal term specific color filter is provided.
  • monochrome semiconductor light sources are dispensable. In addition to the independence of individual manufacturers results in a significant cost reduction through component reduction in the driver modules. Also advantageous is the expected uniform lifetime of the white point light source, while monochrome semiconductor light sources have very different lifetimes depending on the required current to achieve the minimum axis light intensity.
  • each signal term is associated with a point light source having a white LED or a white HLED high current LED.
  • a corresponding color filter is fixed between the point light source and the collection optics.
  • a component and size reduction can be achieved by the signal terms according to claim 3, a common point light source with a white LED or a white HLED and a common collection optics is assigned, with an automatic change to positioning signal term specific color filter in the aperture area of
  • Point light source is provided.
  • the color filter according to claim 4 is preferably designed as a polycarbonate color filter film. These very cost-effective color foils are very frequently used in the field of photography. In addition, polycarbonate color filter sheets are particularly resistant to temperature and long-term stability, with individual color or more combined color films can produce almost any desired color location in the radiation when using the HLED white light source.
  • the filter films to be used are only dependent on the spectral composition of the Achslichtanteils and can be determined and optimized very accurately according to the spectral properties of the filter films.
  • the transmittance of the color filter foils is comparable to the transmittance of corresponding color glass panes used in incandescent light sources.
  • FIG. 1 light signals of known design
  • FIG. 2 shows a light signal of the claimed type
  • a single white HLED high-current LED 8 is used as the point light source. This is arranged on a circuit board 9 with heat sink 10. To realize different signal colors, a color filter sheet arrangement 12 is provided between the HLED and a collecting optics 11.
  • FIG. 3 shows on the left an emission spectrum 13 of the white HLED 8.
  • This HLED 8 is combined with the color filter foil arrangement 12, which consists of two color filter sheets with the transmission spectra 14 and 15. It can be seen that the resulting total spectrum 16 has a high degree of transmittance for the color locus yellow, so that a yellow-emitting light signal is produced.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Mechanical Engineering (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Led Device Packages (AREA)
  • Led Devices (AREA)

Abstract

Die Erfindung betrifft ein Lichtsignal mit Halbleiter-Lichtquelle (2) und Sammeloptik (11) zur Darstellung von Signalbegriffen, insbesondere bei schienengebundenen Verkehrswegen. Um monochrome Halbleiter-Lichtquellen entbehrlich zu machen, ist vorgesehen, dass die Halbleiter-Lichtquelle (2) als weiße Punktlichtquelle ausgebildet ist, wobei in dem Aperturbereich der Punktlichtquelle ein signalbegriffsspezifischer Farbfilter vorgesehen ist.

Description

Beschreibung Lichtsignal Die Erfindung betrifft ein Lichtsignal mit Halbleiter-Lichtquelle und Sammeloptik zur Darstellung von Signalbegriffen, insbesondere bei schienengebundenen Verkehrswegen.
Die nachstehenden Erläuterungen beziehen sich im Wesentlichen auf Leuchtzeichen oder Lichtsignale zur Darstellung von Signalbegriffen bei schienengebundenen Verkehrswegen, ohne dass der beanspruchte erfinderische Gegenstand auf diese Anwendung beschränkt sein soll. Bei den vier in Figur 1 schematisch dargestellten Lichtsignalen bekannter Bauart wird als Lichtquelle entweder eine Glühfadenanordnung einer Glühlampe 1 oder eine Halbleiter-Lichtquelle 2 verwendet. Das Glühfadenlichtsignal besteht im Wesentlichen aus der Glühlampe 1 und einem optischen System mit Volllinse 3 oder Stufenlinse 4 sowie einem Farbfilterglas 5 zur Realisierung der üblichen Signalfarben, insbesondere rot, grün und gelb. Bei dem in Figur 1 rechts veranschaulichten Halbleiter-Lichtquellen 2, beispielsweise LEDs - lichtemittierende Dioden - wird das Licht durch elektrische Anregung eines Halbleiters erzeugt. Halbleiter-Lichtquellen 2 besitzen eine gänzlich andere Abstrahlcharakteristik als Glühlampen 1, so dass in der Regel das komplette optische System durch eine LED-spezifische Linsenmatrix 6 ersetzt werden muss. Für bestimmte Baugrößen werden auch LEDs 7 verwendet, die bereits mit Linsenoptiken versehen sind. Diese LEDs 7 und optiklose LEDs 7.1 müssen als monochrome LEDs mit engen Farbortgrenzen ausgebildet sein, um die signalspezifische Lichtfarbe dauerhaft sicher zu erzeugen. Neben der Farborttreue muss auch eine Mindest-Achslichtintensität erreicht werden. Problema- tisch bei monochromen LEDs 7, 7.1 ist darüber hinaus die notwendige Verfügbarkeit, die Lagerhaltung einer Mehrzahl von LED-Typen sowie deren Herstellerabhängigkeit. Außerdem ist die LED-Bestromung für gleiche Helligkeit farbabhängig, so dass Signalgeber mit unterschiedlichen Treiberbaugruppen erforderlich sind. Die Sicherheitsnachweise für Signalgeber sind infolgedessen sehr aufwändig.
Der Erfindung liegt die Aufgabe zugrunde, ein Lichtsignal der gattungsgemäßen Art zu vereinfachen, wobei insbesondere die
Typenvielfalt der notwendigen Halbleiter-Lichtquellen zu verringern ist.
Erfindungsgemäß wird die Aufgabe dadurch gelöst, dass die Halbleiter-Lichtquelle als weiße Punktlichtquelle ausgebildet ist, wobei in dem Aperturbereich der Punktlichtquelle ein signalbegriffsspezifischer Farbfilter vorgesehen ist.
Durch die Reduzierung auf Punktlichtquellen des Weißlichttyps werden monochrome Halbleiter-Lichtquellen entbehrlich. Neben der Unabhängigkeit von einzelnen Herstellern ergibt sich eine deutliche Kostenreduzierung durch Bauteilreduktion bei den Treiberbaugruppen. Vorteilhaft ist auch die zu erwartende einheitliche Lebensdauer der weißen Punktlichtquelle, während monochrome Halbleiter-Lichtquellen je nach erforderlicher Bestromung zur Erreichung der Mindest-Achslichtintensität sehr unterschiedliche Lebensdauern aufweisen.
Prinzipiell ist zu erwarten, dass zukünftig die erreichbare Lichtausbeute bei Punktlichtquellen, insbesondere auf HLED- Basis für Weißlicht, weiter steigen wird. Das bedeutet, zukünftig eingesetzte noch leistungsstärkere weiße HLED können bei gleicher Lichtstärke geringer bestromt werden, womit die Lebensdauer der HLED steigt. Gemäß Anspruch 2 ist jedem Signalbegriff eine Punktlichtquelle mit einer weißen LED oder einer weißen HLED - Hochstrom-LED - zugeordnet. Je nach Signalbegriff wird ein ent- sprechender Farbfilter zwischen der Punktlichtquelle und der Sammeloptik fest angeordnet.
Bei Lichtsignalen, die für mehrere Signalbegriffe ausgelegt sind, kann eine Bauteile- und Baugrößenreduzierung erreicht werden, indem den Signalbegriffen gemäß Anspruch 3 eine gemeinsame Punktlichtquelle mit einer weißen LED oder einer weißen HLED sowie eine gemeinsame Sammeloptik zugeordnet ist, wobei eine Wechselautomatik zur Positionierung signalbegriffsspezifischer Farbfilter in dem Aperturbereich der
Punktlichtquelle vorgesehen ist.
Vorzugsweise ist der Farbfilter gemäß Anspruch 4 als Polykar- bonat-Farbfilterfolie ausgebildet. Diese sehr kostengünstigen Farbfolien werden im Bereich der Fotographie sehr häufig an- gewendet. Außerdem sind Polycarbonat-Farbfilterfolien besonders temperaturbeständig und langzeitstabil, wobei einzelne Farbfolien oder mehrere miteinander kombinierte Farbfolien bei Verwendung der HLED-Weißlichtquelle annähernd jeden gewünschten Farbort in der Abstrahlung erzeugen können. Die zu verwendenden Filterfolien sind dabei lediglich von der spektralen Zusammensetzung des Achslichtanteils abhängig und können entsprechend der spektralen Eigenschaften der Filterfolien sehr genau bestimmt und optimiert werden. Der Transmissionsgrad der Farbfilterfolien ist dabei mit dem Transmis- sionsgrad entsprechender Farbglasscheiben, welche bei Glühlampen-Lichtquellen verwendet werden, vergleichbar.
Die Erfindung wird nachfolgend anhand figürlicher Darstellungen näher erläutert. Es zeigen: Figur 1 Lichtsignale bekannter Bauart,
Figur 2 ein Lichtsignal beanspruchter Bauart,
Figur 3 spektrale Lichtverteilung zur Erzeugung eines gelben Farbortes.
Im Unterschied zu den vier in Figur 1 veranschaulichten und oben beschriebenen Lichtsignalen wird bei dem erfindungsgemäßen Lichtsignal, das in Figur 2 dargestellt ist, eine einzige weiße HLED - Hochstrom-LED - 8 als Punktlichtquelle verwendet. Diese ist auf einer Platine 9 mit Kühlkörper 10 angeordnet. Zur Realisierung unterschiedlicher Signalfarben ist zwischen der HLED und einer Sammeloptik 11 eine Farbfilterfolienanordnung 12 vorgesehen.
Figur 3 zeigt links ein Emissionsspektrum 13 der weißen HLED 8. Diese HLED 8 wird mit der Farbfilterfolienanordnung 12 kombiniert, die aus zwei Farbfilterfolien mit den Transmissionsspektren 14 und 15 besteht. Es ist ersichtlich, dass das resultierende Gesamtspektrum 16 einen hohen Transmissionsgrad für den Farbort gelb aufweist, so dass ein gelb leuchtendes Lichtsignal entsteht.

Claims

Patentansprüche
1. Lichtsignal mit Halbleiter-Lichtquelle (2) und Sammeloptik (11) zur Darstellung von Signalbegriffen, insbesondere bei schienengebundenen Verkehrswegen,
d a d u r c h g e k e n n z e i c h n e t , dass
die Halbleiter-Lichtquelle (2) als weiße Punktlichtquelle ausgebildet ist, wobei in dem Aperturbereich der Punktlichtquelle mindestens ein signalbegriffsspezifischer Farbfilter vorgesehen ist.
2. Lichtsignal nach Anspruch 1,
d a d u r c h g e k e n n z e i c h n e t , dass
jedem Signalbegriff eine Punktlichtquelle mit einer weißen LED - lichtemittierende Diode - oder einer weißen HLED - Hochstrom-LED - (8) zugeordnet ist.
3. Lichtsignal nach Anspruch 1,
d a d u r c h g e k e n n z e i c h n e t , dass
den Signalbegriffen eine gemeinsame Punktlichtquelle mit einer weißen LED - lichtemittierende Diode - oder einer weißen HLED - Hochstrom-LED - sowie eine gemeinsame Sammeloptik zugeordnet ist, wobei eine Wechselautomatik zur Positionierung signalbegriffsspezifischer Farbfilter in den Apertur- bereich der Punktlichtquelle vorgesehen ist.
4. Lichtsignal nach einem der vorangehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , dass
der Farbfilter als Polycarbonat-Farbfilterfolie ausgebildet ist.
EP10739567.5A 2009-08-31 2010-07-27 Lichtsignal Active EP2473777B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009039703A DE102009039703A1 (de) 2009-08-31 2009-08-31 Lichtsignal
PCT/EP2010/060887 WO2011023480A1 (de) 2009-08-31 2010-07-27 Lichtsignal

Publications (2)

Publication Number Publication Date
EP2473777A1 true EP2473777A1 (de) 2012-07-11
EP2473777B1 EP2473777B1 (de) 2018-01-17

Family

ID=43027440

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10739567.5A Active EP2473777B1 (de) 2009-08-31 2010-07-27 Lichtsignal

Country Status (6)

Country Link
US (1) US8702282B2 (de)
EP (1) EP2473777B1 (de)
CN (1) CN102483217A (de)
DE (1) DE102009039703A1 (de)
RU (1) RU2543402C2 (de)
WO (1) WO2011023480A1 (de)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009039704A1 (de) * 2009-08-31 2011-03-17 Siemens Aktiengesellschaft Lichtsignal
WO2014015599A1 (zh) * 2012-07-27 2014-01-30 Zhang Wenhu Led信号灯
US9978270B2 (en) 2014-07-28 2018-05-22 Econolite Group, Inc. Self-configuring traffic signal controller
CN105788317B (zh) * 2014-12-11 2018-07-24 江苏永电太阳能照明有限公司 太阳能交通灯

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Also Published As

Publication number Publication date
CN102483217A (zh) 2012-05-30
US20120153314A1 (en) 2012-06-21
RU2012112515A (ru) 2013-10-10
RU2543402C2 (ru) 2015-02-27
DE102009039703A1 (de) 2011-03-17
WO2011023480A1 (de) 2011-03-03
EP2473777B1 (de) 2018-01-17
US8702282B2 (en) 2014-04-22

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