EP1179219B1 - Module a diodes electroluminescentes pour dispositifs de signalisation - Google Patents

Module a diodes electroluminescentes pour dispositifs de signalisation Download PDF

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Publication number
EP1179219B1
EP1179219B1 EP00943604.9A EP00943604A EP1179219B1 EP 1179219 B1 EP1179219 B1 EP 1179219B1 EP 00943604 A EP00943604 A EP 00943604A EP 1179219 B1 EP1179219 B1 EP 1179219B1
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EP
European Patent Office
Prior art keywords
led module
module according
led
support plate
leds
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
EP00943604.9A
Other languages
German (de)
English (en)
Other versions
EP1179219A1 (fr
Inventor
Günter Waitl
Simon BLÜMEL
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.)
Ams Osram International GmbH
Original Assignee
Osram Opto Semiconductors GmbH
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
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Application filed by Osram Opto Semiconductors GmbH filed Critical Osram Opto Semiconductors GmbH
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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
    • B61L5/1836—Daylight signals using light sources of different colours and separate optical systems
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
    • E01F9/50—Road surface markings; Kerbs or road edgings, specially adapted for alerting road users
    • E01F9/553—Low discrete bodies, e.g. marking blocks, studs or flexible vehicle-striking members
    • E01F9/559—Low discrete bodies, e.g. marking blocks, studs or flexible vehicle-striking members illuminated
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
    • E01F9/50—Road surface markings; Kerbs or road edgings, specially adapted for alerting road users
    • E01F9/576—Traffic lines
    • E01F9/582—Traffic lines illuminated
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
    • E01F9/50—Road surface markings; Kerbs or road edgings, specially adapted for alerting road users
    • E01F9/576—Traffic lines
    • E01F9/594—Traffic lines movable for reuse at different locations
    • 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
    • F21V5/00—Refractors for light sources
    • F21V5/007—Array of lenses or refractors for a cluster of light sources, e.g. for arrangement of multiple light sources in one plane
    • 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
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • 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
    • 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
    • F21W2111/06—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00 for aircraft runways 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 invention relates to an LED module, which can be used in particular in signaling devices with a very small beam angle.
  • a strong light source of small dimensions e.g. the filament of an incandescent lamp, placed in the focal point of an optical lens and projected at infinity at eye level of the train driver. Due to the high luminance of the light source produces a very high light intensity at a very small beam angle, so that the signal from a long distance (> 3 km) is still clearly visible.
  • incandescent lamps have a limited service life, with the failure of the incandescent lamp used for a railway signaling device always being associated with total failure of the entire signaling device. Therefore, the incandescent lamps must be replaced at the railway signal devices as a precaution at regular intervals. These time intervals are far shorter than the average life of the lamp, so that with the replacement of a considerable material and time is required.
  • incandescent lamps are used in the railway signal devices, which have a second filament.
  • This second filament is switched on failure of the first filament.
  • the second filament is not arranged optimally in the focus of the lens, the light intensity of the path signal decreases in the event of a fault to approximately 12%. Therefore, a repair must be done immediately in this case.
  • Leitsignal styles that are embedded in the ground for luminescent marking of roads, roads or runways exist Similar problems due to the use of conventional light bulbs as light sources.
  • LEDs semiconductor light emitting diodes
  • LEDs Due to the high failure sensitivity of conventional incandescent lamps, it is therefore appropriate to use as light sources semiconductor light emitting diodes (LEDs), since LEDs not only a significantly longer life, but also a better efficiency in the conversion of electrical energy in radiation energy in the visible spectral range and - associated - Have a lower heat output and a lower overall space requirement.
  • LEDs semiconductor light emitting diodes
  • the conventional railway signal device of optics which is adapted to focus the light emitted by the individual LEDs so that it also in relative long distance is perceived as an extended and bright light source.
  • a system of an LED arrangement with only one lens is not suitable, since in this case the radiation angle can not be reduced below a physical limit.
  • LED module in which a number of LEDs between two parallel electrically conductive rods is firmly mounted.
  • the LEDs used therein are each cast with their electrical leads in a transparent plastic such as epoxy resin.
  • a lens can be made by providing the light exit surface of this resulting resin block with a bump, ie, a convex portion.
  • each unit consisting of an LED and a lens must be manufactured one by one in this way. For the production of a matrix of several LEDs with associated lenses, this production is too expensive.
  • the failure of the LED means that the lens can not be used, whereby this arrangement is very inflexible.
  • an LED display which has a plurality of LED chips, which are mounted on a common substrate.
  • each LED chip is followed by a lens, which is inserted into a corresponding bore in a carrier plate.
  • the assembly of the individual LED chips on a substrate is relatively expensive and requires in particular for each chip, the formation of a wire connection from the chip top to the substrate.
  • an electroluminescent display which comprises a display panel with a plurality of differently colored pixels and a lens system covering the display panel.
  • the lens system consists of close-fitting individual lenses, which lead to an improvement in the directional characteristic of the emitted luminous flux.
  • Light emitting semiconductor devices which contain a semiconductor body and a luminescence conversion element.
  • the luminescence conversion element converts a part of the radiation emitted by the semiconductor body in the blue, green or ultraviolet spectral range into light of a different wavelength, so that the optical impression of mixed-color, in particular white light arises.
  • the light-bundling optical devices are formed by lenses.
  • the optics support plate includes an array of wells corresponding to the LED array, which are bores into which the lenses are plugged as individually manufactured components.
  • the lenses are each constructed such that they have a square-shaped main body with an outwardly curved light exit surface and a tapered in cross-section relative to the main body and corresponding to the recess of the optical support plate complementary pedestal.
  • a particular advantage of this embodiment is that the module can be adapted in a simple and fast way different application areas and the parameters given thereby.
  • the light-bundling optical devices are formed by optical channels, which are integrated into the optical carrier plate and having the inclined or curved, reflective inner walls.
  • a lens is arranged directly on each LED component, which is thus connected upstream of the respective light-bundling optical device of the optical carrier plate.
  • the optical carrier plate and / or the lenses contain polymethyl methacrylate (PMMA). Regardless of the choice of the material of the optical carrier plate and the lenses, it is also desirable if the optical carrier plate and / or the lenses - optionally as an integral part - are made by injection molding.
  • PMMA polymethyl methacrylate
  • the LED module according to the invention is particularly suitable for installation in signaling devices such as railway signaling devices or embedded in the ground Leitsignal Steen or Lighting devices of any kind used for other purposes.
  • FIG Fig.1 A first aspect of an embodiment of an LED module according to the invention with a circuit board 1 and an optical carrier plate 2 is shown in FIG Fig.1 shown in a side view.
  • a plurality of LEDs 10 are shown in the arrangement of a matrix. The arrangement can also be formed by a single row of LEDs.
  • a metal core board is preferably used to improve the heat dissipation of the LEDs, whereby the light output of the LEDs can be improved.
  • the LEDs are preferably mounted in the surface mounting technology SMT (Surface Mount Technology) on the board 1.
  • SMT Surface Mount Technology
  • SIEMENS SMT-TOPLED the already mentioned SIEMENS SMT-TOPLED can be used.
  • the circuit design of the LEDs 10 can be made so that several separate, independent circuits are arranged. As a result, a high reliability of the module can be ensured.
  • the LEDs 10 may be in two independent circuits each having 15 parallel ones Strands are arranged, with two LEDs 10 are connected in
  • the optical carrier plate 2 containing the lens assembly is arranged.
  • the circuit board 1 and the optical support plate 2 may be rigidly connected together in a suitable manner, so that their relative position to each other remains constant.
  • the circuit board 1 and the optical support plate 2 are connected to each other via a snap-in connector.
  • the optical carrier plate 20 includes a plurality of lenses 20 individually associated with the LEDs 10, respectively. As in Fig.1 shown, the lenses 20 are made as individual components and inserted into the optical support plate 2 by a snap-in connector.
  • the optical carrier plate 2 is shaped in the manner of a setting box with a number of recesses 25, which are present in the same matrix-like arrangement as the LEDs 10. These depressions 25 have, for example, a circular cross-section.
  • a further light-bundling optical device 11, in particular a lens is arranged, which is thus upstream of the respective light-bundling optical device 20,30 of the optical carrier plate 2 in the emission direction of the LED device 10.
  • a single lens 20 is shown in a side view (A) and a view from the side of the light exit surface (B).
  • the lens 20 consists of a square-shaped main body 21 and a base 22 connected thereto on the opposite side of the light exit surface, which is tapered in cross-section with respect to the main body 21.
  • the base 22 is complementary to the recess 25 of the optical support plate 2, so that in the inserted state of the lens 20, the protruding at the boundary of the base 22 to the main body 21 surface of the main body 21 rests on the optical support plate 2.
  • the cross section of the main body 21 is dimensioned such that when inserted State, the main body 21 of the lenses 20 abut each other gapless.
  • the embodiment of the invention thus has the advantage that the module appears when viewed from a distance of a few meters as homogeneously illuminated surface.
  • the main body 21 has on the light exit surface an outwardly curved surface 21a, through which the actual lens is formed.
  • the curved surface 21a can be shaped in such a way that the active surface of the LED 10 lies in the focal point of the lens 20.
  • the side walls of the main body 21 and / or the base 22 may be formed as reflectors to increase the light output.
  • the optical carrier plate 2 and the lenses 20 are particularly well polymethyl methacrylate (PMMA) with a refractive index of 1.5.
  • PMMA polymethyl methacrylate
  • an injection-moldable material is preferably used.
  • FIG Figure 3 A second aspect of an embodiment of an LED module according to the invention is shown in FIG Figure 3 shown in a side view. This one will be like in Fig.1 a board 1 with a regular array of LEDs 10 applied thereto.
  • optical carrier plate 2 here has, as light-bundling optical devices, a regular arrangement of optical channels 30 corresponding to the LED arrangement, which are formed in the optical carrier plate 2 and have reflective side walls.
  • the side walls are, as shown, inclined in such a way that the channel cross-section increases in the direction of light propagation. Instead of straight side walls can also be provided a curved course.
  • the channels 30 are formed as bores through the optical carrier plate 2, which are either continuous or extend at least over part of the cross section of the optical carrier plate 2.
  • the channels 30 are made of a material having a relatively high refractive index, as in a refractive index guided glass fiber, while the channels 30 immediate material of the optical support plate 2 has a relatively low refractive index, so that the impacting on the interface Light is reflected at this by total reflection.
  • the change in the refractive index may be stepped or gradual.
  • the LED module according to the invention has the advantage that it appears when viewed from a distance of a few meters as homogeneously illuminated surface.
  • the module according to the invention can be advantageously used particularly in railway signaling devices. But it can also be used for other signaling devices such as embedded in the ground Leitsignal Superioren, the luminescent marking of roads, streets, squares, tunnels, take-off and landing serve tracks or the like. In such applications, the flat design of the LED module according to the invention has a particularly advantageous effect.
  • Another field of application are traffic lights or spotlights, such as spotlights, or other such lighting objects, as they can be used for effect lighting in discotheques for example.
  • the emission wavelength of the LED is in principle arbitrary.
  • multicolor signals can be generated by using LEDs of different colors.
  • a white light LED can also be used.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Led Device Packages (AREA)

Claims (12)

  1. Module à diodes électroluminescentes avec
    - un agencement régulier de diodes électroluminescentes (10) individuelles, en particulier pouvant être montées en surface, qui sont montées sur une surface principale d'une plaque de connexion électrique (1), en particulier d'une platine, un premier et un deuxième dispositif optique (20; 30) concentrant la lumière disposés dans la direction du faisceau étant attribués à chaque diode électroluminescente (10), et
    - une plaque de support d'optique (2),
    - la plaque de support d'optique (2) étant positionnée sur les diodes électroluminescentes (10) à une distance de la plaque de connexion électrique (1),
    - le premier dispositif optique concentrant la lumière étant un trou (30) formé dans la plaque de support d'optique (2) avec des parois réfléchissantes, et
    - le deuxième dispositif optique concentrant la lumière étant une lentille (20),
    caractérisé en ce que
    - la lentille (20) comporte un corps principal de forme carrée avec une surface de sortie de lumière bombée vers l'extérieur et un socle diminuant en section transversale par rapport au corps principal et complémentaire vers le trou (30) de la plaque de support d'optique, le socle étant inséré dans le trou.
  2. Module à diodes électroluminescentes selon la revendication 1,
    - la plaque de support d'optique (2) étant disposée de telle sorte par rapport à la plaque de connexion électrique (1) que chaque puce à diode électroluminescente des éléments de construction à diodes électroluminescentes (10) est positionnée dans le foyer de la lentille correspondant (20) à celle-ci.
  3. Module à diodes électroluminescentes selon la revendication 1,
    - les corps principaux (21) de forme carrée sont disposés l'un à côté de l'autre sans vide à l'état inséré des lentilles (20).
  4. Module à diodes électroluminescentes selon la revendication 1,
    - les parois latérales du corps principal (21) et/ou du socle (22) étant formées comme des réflecteurs.
  5. Module à diodes électroluminescentes selon l'une quelconque des revendications précédentes,
    - la plaque de support d'optique (2) et/ou les lentilles (20) contiennent du polyméthylméthacrylate (PMMA).
  6. Module à diodes électroluminescentes selon l'une quelconque des revendications précédentes,
    - la plaque de support d'optique (2) et/ou les lentilles (20) sont fabriquées par moulage par injection.
  7. Module à diodes électroluminescentes selon l'une quelconque des revendications précédentes,
    - une autre lentille (11) étant disposée directement sur chaque diode électroluminescente (10), la lentille (11) étant de ce fait arrangée dans la direction du faisceau des diodes électroluminescentes (10) respectives en amont du dispositif optique (20; 30) concentrant la lumière respectivement affecté de la plaque de support d'optique (2).
  8. Module à diodes électroluminescentes selon l'une quelconque des revendications précédentes,
    - la platine (1) étant une platine à noyau métallique.
  9. Module à diodes électroluminescentes selon l'une quelconque des revendications précédentes,
    - les diodes électroluminescentes (10) étant connectées à au moins deux circuits de courant indépendants.
  10. Module à diodes électroluminescentes selon l'une quelconque des revendications précédentes,
    - les diodes électroluminescentes (10) comportant un matériau de conversion à travers lequel au moins une partie du faisceau lumineux émis par les diodes électroluminescentes (10) est convertie en longueurs d'ondes de sorte que l'empreinte optique des diodes électroluminescentes à lumière blanche est créée.
  11. Utilisation d'un module à diodes électroluminescentes selon l'une ou plusieurs des revendications précédentes pour des dispositifs de signalisation, en particulier pour des dispositifs de signalisation de voie ou des dispositifs de signalisation de guidage encastrés dans le sol destinés au repérage lumineux de chemins, de rues, de tunnels, de pistes de décollage et d'atterrissage et éléments analogues.
  12. Dispositif d'éclairage contenant un module à diodes électroluminescentes selon l'une quelconque des revendications 1 à 10.
EP00943604.9A 1999-05-14 2000-05-15 Module a diodes electroluminescentes pour dispositifs de signalisation Expired - Lifetime EP1179219B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19922361 1999-05-14
DE19922361A DE19922361C2 (de) 1999-05-14 1999-05-14 LED-Modul für Anzeigeeinrichtungen
PCT/DE2000/001537 WO2000070687A1 (fr) 1999-05-14 2000-05-15 Module a diodes electroluminescentes pour dispositifs de signalisation

Publications (2)

Publication Number Publication Date
EP1179219A1 EP1179219A1 (fr) 2002-02-13
EP1179219B1 true EP1179219B1 (fr) 2016-05-11

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ID=7908146

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EP00943604.9A Expired - Lifetime EP1179219B1 (fr) 1999-05-14 2000-05-15 Module a diodes electroluminescentes pour dispositifs de signalisation

Country Status (4)

Country Link
EP (1) EP1179219B1 (fr)
CN (1) CN1193437C (fr)
DE (1) DE19922361C2 (fr)
WO (1) WO2000070687A1 (fr)

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Also Published As

Publication number Publication date
EP1179219A1 (fr) 2002-02-13
CN1350704A (zh) 2002-05-22
CN1193437C (zh) 2005-03-16
DE19922361C2 (de) 2003-05-28
WO2000070687A1 (fr) 2000-11-23
DE19922361A1 (de) 2000-11-30

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