EP1179219A1 - Module a diodes electroluminescentes pour dispositifs de signalisation - Google Patents

Module a diodes electroluminescentes pour dispositifs de signalisation

Info

Publication number
EP1179219A1
EP1179219A1 EP00943604A EP00943604A EP1179219A1 EP 1179219 A1 EP1179219 A1 EP 1179219A1 EP 00943604 A EP00943604 A EP 00943604A EP 00943604 A EP00943604 A EP 00943604A EP 1179219 A1 EP1179219 A1 EP 1179219A1
Authority
EP
European Patent Office
Prior art keywords
led module
module according
led
lenses
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
EP00943604A
Other languages
German (de)
English (en)
Other versions
EP1179219B1 (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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7908146&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1179219(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Osram Opto Semiconductors GmbH filed Critical Osram Opto Semiconductors GmbH
Publication of EP1179219A1 publication Critical patent/EP1179219A1/fr
Application granted granted Critical
Publication of EP1179219B1 publication Critical patent/EP1179219B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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 signal devices with a very small beam angle.
  • Conventional railway signaling technology usually uses a strong light source with small dimensions such as the filament of an incandescent lamp, placed in the focus of an optical lens and projected into infinity at the level of the driver. Due to the high luminance of the light source, there is a very high light intensity with a very small beam angle, so that the signal can still be clearly recognized even from a great distance (> 3 km).
  • incandescent lamps have a limited lifespan, the failure of the incandescent lamp used for a railway signal device always being associated with a total failure of the entire signal device.
  • the light bulbs in the railway signaling devices must be replaced at regular intervals. These time intervals are much shorter than the average life of the lamp, so that the replacements involve a considerable amount of material and time.
  • incandescent lamps which have a second incandescent filament are used in the railway signaling devices. This second filament is switched on if the first filament fails.
  • the second filament is not optimally arranged in the focus of the lens, the light intensity of the path signal drops to approx. 12% in the event of an error. Therefore, a repair must be carried out immediately in this case.
  • LEDs semiconductor light-emitting diodes
  • optics are required which are suitable for bundling the light emitted by the individual LEDs in such a way that it also is perceived at a relatively large distance as an extensive and brightly shining light source.
  • a system consisting of an LED arrangement with only one lens is not suitable since the beam angle cannot be reduced below a physically determined limit value.
  • An LED module is known from US-A-5404282, in which a number of LEDs are fixedly mounted between two parallel, electrically conductive rods. According to FIG. 3 of this document, the LEDs used therein are each cast with their electrical leads in a transparent plastic such as epoxy resin.
  • a lens can be produced by providing the light exit surface of this synthetic resin block with a bump, ie a section that is curved outwards.
  • each unit consisting of an LED and a lens must be manufactured individually in this way. This type of production is too complex for the production of a matrix from several LEDs with associated lenses.
  • the failure of the LED means that the lens can no longer be used, making this arrangement very inflexible. It is therefore the object of the present invention to provide an LED module, in particular for use in signaling devices or lighting devices, which can be manufactured and constructed as simply as possible and can be used as flexibly as possible.
  • the invention describes an LED module with a regular arrangement of LEDs, which are mounted on a circuit board and are each provided with a light-bundling optical device, wherein an optical support plate is also provided, which the light-bundling optical devices in one of the LED Arrangement corresponding regular arrangement contains.
  • the light-bundling optical devices are formed by lenses.
  • the optics carrier plate contains an arrangement of depressions corresponding to the LED arrangement, into which the lenses can be inserted as individually manufactured components.
  • the lenses are each constructed in such a way that they have a square-shaped main body with an outwardly curved light exit surface and a base which is tapered in cross-section with respect to the main body and corresponds to the recess of the optics carrier plate.
  • elevations are arranged in the optics carrier plate instead of the depressions, onto which the lenses can be attached.
  • a particular advantage of this embodiment is that the module can be easily and quickly adapted to different areas of application and the parameters specified thereby.
  • the lenses are integrally formed in the optics carrier plate.
  • the optical carrier plate must consist of a material that is transparent to the emission wavelength of the LEDs.
  • the light-bundling optical devices are formed by optical channels which are integrated in the optics carrier plate and which have inclined or curved, reflecting inner walls.
  • a further light-bundling optical device in particular a lens, is arranged directly on each LED component, which is thus connected upstream of the respective light-bundling optical device of the optics carrier plate.
  • the optics carrier plate and / or the lenses contain polymethyl methacrylate (PMMA). Regardless of the choice of the material of the optics carrier plate and the lenses, it is also desirable if the optics carrier plate and / or the lenses - optionally as a one-piece part - are made by injection molding.
  • PMMA polymethyl methacrylate
  • An LED which is preferably used for the LED module according to the invention is, for example, in the article "SIEMENS SMT-TOPLED for surface mounting" by F. Möllmer and G. Waitl in the magazine Siemens Components 29 (1991), issue 4, p. 147 in connection described with picture 1.
  • This form of LED is extremely compact and allows a large number of LEDs to be arranged on the circuit board.
  • the LED module according to the invention is particularly suitable for installation in signaling devices such as railway signaling devices or control signal devices or embedded in the floor lighting equipment of any kind used for other purposes.
  • Fig.l is a side or cross-sectional view of a first embodiment of an LED module according to the invention.
  • FIG. 2A shows a side view of a lens used in an LED module according to FIG. 1; and FIG. 2B shows a view of the lens from the side of the light exit surface;
  • FIG 3 shows a side or cross-sectional view of a second embodiment of an LED module according to the invention.
  • a first embodiment of an LED module according to the invention with a circuit board 1 and an optics carrier plate 2 is shown in a side view in FIG.
  • a plurality of LEDs 10 are shown on the circuit board 1 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 as the board 1 in order to improve the heat dissipation from the LEDs, as a result of which the luminous efficacy of the LEDs can be improved.
  • the LEDs are preferably mounted on the circuit board 1 using surface mounting technology SMT (Surface-Mount Technology).
  • SIEMENS SMT-TOPLED can be used as LED 10.
  • the circuitry structure of the LEDs 10 can be such that several separate, independent circuits are arranged. This ensures a high level of reliability for the module.
  • the LEDs 10 can be arranged in two independent circuits, each with 15 parallel strands, two LEDs 10 being connected in series in each individual strand.
  • the optics carrier plate 2 containing the lens arrangement is orderly .
  • the circuit board 1 and the optics carrier plate 2 can be rigidly connected to one another in a suitable manner so that their relative position to one another remains constant.
  • the circuit board 1 and the optics carrier plate 2 are preferably connected to one another via a snap-in plug connection.
  • the optics carrier plate 20 contains a plurality of lenses 20, which are individually assigned to the LEDs 10.
  • An optics carrier plate 20 can be used, in whose surface on the light exit side the lenses 20 are shaped, for example, as elevations, so that the lenses 20 are integrally connected to the optics carrier plate 2.
  • an arrangement as in FIG. 1 is preferred, in which the lenses 20 are manufactured as individual components and can be inserted into the optics carrier plate 2 by means of a snap-in plug connection.
  • the optics carrier plate 2 is shaped in the manner of a type case with a number of depressions 25 which are in the same matrix-like arrangement as the LEDs 10. These depressions 25 have, for example, a circular cross section.
  • each LED component 10 Immediately on each LED component 10 is a further light-bundling optical device 11, in particular a lens, which is thus connected upstream of the respective light-bundling optical device 20, 30 of the optics carrier plate 2 in the direction of radiation of the LED component 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 accordingly consists of a square-shaped main body 21 and a base 22 connected to it on the side opposite the 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 optics support plate 2, so that in the inserted
  • the surface of the main body 21 projecting at the boundary of the base 22 to the main body 21 rests on the optics carrier plate 2. Furthermore, the cross section of the main body 21 is dimensioned such that the main bodies 21 of the lenses 20 are in contact with one another without gaps in the inserted state. lying there.
  • the exemplary embodiment according to the invention thus has the advantage that the module appears as a homogeneously illuminated surface when viewed from a distance of a few meters.
  • the complementarity of the optical support plate 2 and the lenses 20 can also be carried out in reverse, in which case instead of the recesses 25 corresponding elevations are formed in the optical support plate 2 and the individual lenses 20 are provided with corresponding complementary recesses.
  • 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 such 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 can be shaped as reflectors to increase the luminous efficiency.
  • Polymethyl methacrylate (PMMA) with a refractive index of 1.5 is particularly suitable as the material for the optics carrier plate 2 and the lenses 20. But others can too
  • Plastics are used, the shape of the lens, i.e. the shape of the curved surface 21a must be changed.
  • An injection moldable material is preferably used for series production with large quantities.
  • FIG. 1 A second embodiment of an LED module according to the invention is shown in a side view in FIG.
  • a circuit board 1 with a regular arrangement of LEDs 10 applied thereon is used.
  • the optics carrier plate 2 as light-bundling optical devices, has a regular arrangement of optical channels 30 corresponding to the LED arrangement, which channels are formed in the optics carrier plate 2 and have reflecting side walls.
  • the side walls are inclined in such a way that the channel cross section increases in the direction of light propagation.
  • a curved course can also be provided.
  • the channels 30 are preferably formed as bores through the optics carrier plate 2, which are either continuous or extend at least over part of the cross section of the optics carrier plate 2.
  • the channels 30 consist of a material with a relatively high refractive index, as in the case of a refractive index-guided glass fiber, while the material of the optics carrier plate 2 surrounding the channels 30 has a relatively low refractive index, so that this is due to the Interface light is reflected there by total reflection.
  • the change in the refractive index can be gradual or gradual.
  • Additional lenses can be provided in the LED module of the second exemplary embodiment (FIG. 3). These can be placed on the channels 30 on one side of the optics carrier plate 2. If the channels 30 are formed by bores, the additional lenses can also be inserted into these bores as in the first exemplary embodiment.
  • the LED module according to the invention has the advantage that it appears as a homogeneously illuminated surface when viewed from a distance of a few meters.
  • the module according to the invention can be used particularly advantageously in the case of railway signaling devices. However, it can also be used for other signaling devices, such as guidance signal devices embedded in the ground, which are used to illuminate paths, streets, squares, tunnels, take-off and landing trains or the like.
  • the flat design of the LED module according to the invention has a particularly advantageous effect in such applications.
  • traffic lights or spotlights such as spotlights, or other such lighting objects as can be used for effect lighting, for example in discotheques.
  • the emission wavelength of the LED is arbitrary.
  • multi-colored signals can also be generated by using LEDs of different colors.
  • a white light LED can also be used to imitate the optical properties of a conventional rail signal device as far as possible.
  • an LED with the shortest possible wavelength such as GaN in the blue spectral range, must be used, to which a suitable converter material for producing shorter wavelengths is then applied, so that the optical impression of a white light source results from the mixing of the wavelengths.

Landscapes

  • 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)

Abstract

L'invention concerne un module à diodes électroluminescentes, comportant un ensemble régulier de diodes électroluminescentes (10), chaque diode électroluminescente (10) étant pourvue d'une lentille (20). Les diodes électroluminescentes (10) sont montées sur une platine (1) et une plaque de support (2) pour éléments optiques contient un ensemble régulier, correspondant à l'ensemble de diodes électroluminescentes, de dispositifs (20; 30) optiques de formation de faisceaux lumineux qui peuvent être soit des lentilles (20) soit des canaux optiques (30) présentant des parois latérales réfléchissantes, intégrés dans la plaque de support (2) pour éléments optiques.
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 true EP1179219A1 (fr) 2002-02-13
EP1179219B1 EP1179219B1 (fr) 2016-05-11

Family

ID=7908146

Family Applications (1)

Application Number Title Priority Date Filing Date
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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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010068127A1 (fr) 2008-12-11 2010-06-17 Instytut Optyki Stosowanej Système optique modulaire d'une table lumineuse
EP3182188A1 (fr) 2015-12-17 2017-06-21 Instytut Optyki Stosowanej Système optique pour un seul pixel de panneau de signalisation a message variable
EP3182190A1 (fr) 2015-12-17 2017-06-21 Instytut Optyki Stosowanej Système optique pour la distribution de la lumière à partir d'un seul pixel du panneau de signalisation à message variable

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US7064355B2 (en) 2000-09-12 2006-06-20 Lumileds Lighting U.S., Llc Light emitting diodes with improved light extraction efficiency
US7053419B1 (en) 2000-09-12 2006-05-30 Lumileds Lighting U.S., Llc Light emitting diodes with improved light extraction efficiency
JP2002141556A (ja) 2000-09-12 2002-05-17 Lumileds Lighting Us Llc 改良された光抽出効果を有する発光ダイオード
DE20018865U1 (de) 2000-11-07 2001-02-01 Kegelbahntechnik Dortmund GmbH, 44357 Dortmund Lichtsystem
EP1227458A3 (fr) 2001-01-11 2004-12-22 Dr. techn. Josef Zelisko, Fabrik für Elektrotechnik und Maschinenbau Gesellschaft m.b.H. Dispositif d' affichage et /ou de signalisation
US6987613B2 (en) 2001-03-30 2006-01-17 Lumileds Lighting U.S., Llc Forming an optical element on the surface of a light emitting device for improved light extraction
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CN101162075B (zh) * 2006-10-11 2011-07-06 宁波安迪光电科技有限公司 条形led投光灯
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CN102330906A (zh) * 2011-10-10 2012-01-25 无锡华兆泓光电科技有限公司 一种采用微透镜阵列的大功率集成led灯体结构
CN102364549A (zh) * 2011-11-01 2012-02-29 苏州晶雷光电照明科技有限公司 一种防雷led交通灯
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Cited By (3)

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Publication number Priority date Publication date Assignee Title
WO2010068127A1 (fr) 2008-12-11 2010-06-17 Instytut Optyki Stosowanej Système optique modulaire d'une table lumineuse
EP3182188A1 (fr) 2015-12-17 2017-06-21 Instytut Optyki Stosowanej Système optique pour un seul pixel de panneau de signalisation a message variable
EP3182190A1 (fr) 2015-12-17 2017-06-21 Instytut Optyki Stosowanej Système optique pour la distribution de la lumière à partir d'un seul pixel du panneau de signalisation à message variable

Also Published As

Publication number Publication date
DE19922361A1 (de) 2000-11-30
CN1350704A (zh) 2002-05-22
DE19922361C2 (de) 2003-05-28
CN1193437C (zh) 2005-03-16
WO2000070687A1 (fr) 2000-11-23
EP1179219B1 (fr) 2016-05-11

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