EP2870406A1 - Luminaire d'éclairage à semi-conducteurs avec réfracteurs modulaires - Google Patents

Luminaire d'éclairage à semi-conducteurs avec réfracteurs modulaires

Info

Publication number
EP2870406A1
EP2870406A1 EP13816884.4A EP13816884A EP2870406A1 EP 2870406 A1 EP2870406 A1 EP 2870406A1 EP 13816884 A EP13816884 A EP 13816884A EP 2870406 A1 EP2870406 A1 EP 2870406A1
Authority
EP
European Patent Office
Prior art keywords
modular
refractor
lens
light
lenses
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.)
Withdrawn
Application number
EP13816884.4A
Other languages
German (de)
English (en)
Other versions
EP2870406A4 (fr
Inventor
Robert Fugerer
Rick Kauffman
Donald Vandersluis
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.)
Evolucia Lighting Inc
Original Assignee
Evolucia Lighting Inc
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 Evolucia Lighting Inc filed Critical Evolucia Lighting Inc
Publication of EP2870406A1 publication Critical patent/EP2870406A1/fr
Publication of EP2870406A4 publication Critical patent/EP2870406A4/fr
Withdrawn legal-status Critical Current

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
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • 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
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/02—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages with provision for adjustment
    • 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
    • F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • 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
    • F21V31/00—Gas-tight or water-tight arrangements
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F21V7/06—Optical design with parabolic curvature
    • 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
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/10—Outdoor lighting
    • F21W2131/103—Outdoor lighting of streets or roads
    • 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

  • Solid-State Lighting SSL
  • LEDs Light Emitting Diodes
  • SSL Solid-State Lighting
  • Luminaires based on LEDs have significant advantages over traditional lighting technologies such as longer lifetime, mechanical ruggedness, greater efficiency, and are free of dangerous pollutants such as mercury.
  • SSL luminaires While conventional luminaires typically require only a singular light source, such as a metal halide bulb, SSL luminaires generally perform optimally using a plurality of LEDs. While traditional light sources generally emit light nearly omni-directionally, high-power LEDs generally emit light in a Lambertian pattern. If an LED is to be optimally efficient as a light source, its aiming and beam spread should be controlled individually or in very small groups. Typically, effective aiming can be implemented by mounting the LEDs to a printed circuit board (PCB) which is in turn mounted to an aiming platform which orients each LED or small group of LEDs in the required direction. This platform also provides heat sinking so as to cool the LEDs and allow them to maintain proper operating temperature.
  • PCB printed circuit board
  • Controlling beam spread is accomplished by either using a total internal reflection (TIR) lens that collimates the output of each LED or a compound parabolic reflector or similar to direct the light as needed. Further control is accomplished via spreading lenses that may either be incorporated into the final surface of the collimating lens or added as a secondary element to that lens. For most luminaires, particularly outdoor luminaires, protection against the elements requires another, external protective lens. With each additional lens come two additional surfaces and the material in between. Since each lens surface has some amount of reflectivity, the amount of light transmitted through said lens decreases, reducing overall efficacy of the luminaire.
  • TIR total internal reflection
  • the present disclosure recognizes that having multiple surfaces through which light must be transmitted may degrade overall performance of a luminaire.
  • luminaires that have increased efficacy through a decrease in the number of surfaces through which the light passes, and/or a decrease the amount of material through which the light passes.
  • one option for increasing efficacy in a given luminaire is to reduce the number of surfaces through which the generated light must pass.
  • Various aspects of the present disclosure provide systems, methods, and apparatuses to reduce the number of surfaces through which light must pass by incorporating spreading lenses and the protective external lens into a single apparatus, a modular refractor.
  • An additional gain in efficacy may be realized by using compound-parabolic reflectors to collimate the light produced by the LEDs, rather than a TIR-type lens, thereby minimizing not only the number of surfaces that the light engages but also the volume of lens material through which it passes.
  • a solid state lighting apparatus generally includes a housing having a number of different mounting surfaces, a number of light modules coupled with the various mounting surfaces, and a number of modular refractors, each modular refractor coupled with a corresponding light module and including one or more lenses configured to control of the spread of light generated from one or more light emitting diode (LED) lighting elements coupled with the associated light module.
  • Each modular refractor may provide environmental isolation from at least some of the components of the associated light module.
  • the number of mounting surfaces may have several different mounting angles relative to a surface to be illuminated by the apparatus.
  • the apparatus does not include a separate external protective lens, thus reducing the number of surfaces light must traverse and enhancing the efficacy of the apparatus.
  • At least a subset of the light modules include two or more LEDs coupled with a printed circuit board (PCB), with the PCB mounted to an associated mounting surface.
  • PCB printed circuit board
  • one or more of the mounting surfaces may include a heat sink configured to transfer heat away from the associated LEDs.
  • the modular refractor may include one or more of a total internal reflection (TIR) lens or a compound parabolic reflector.
  • One or more of the lenses may also include spreading lens incorporated into an external lens surface or coupled with the external lens surface as a secondary element to the lens.
  • One or more lenses of each modular refractor are integrated with a modular refractor housing and formed on either an inside surface or outside surface of the housing.
  • one or more lenses of some or all of the modular refractors include materials of at least two different refractive indices that are co-molded together.
  • one or more lenses of one or more of the modular refractors may include a gradient index (GRIN) lens molded into the modular refractor.
  • GRIN gradient index
  • FIG. 1 is a front perspective view of a modular refractor according to various aspects
  • FIG. 2 is a is a rear perspective view of a modular refractor according to various embodiments
  • FIG. 3 is a side elevation view of a modular refractor according to various embodiments;
  • FIG. 4 is top plan view of a modular refractor according to various embodiments;
  • FIG. 4A is a cross section view along section A-A of FIG. 4;
  • FIG. 5 is a detail view of a portion of FIG. 4A;
  • FIG. 6 is a front perspective view of a light module according to various embodiments.
  • FIG. 7 is a top plan view of a light module according to various embodiments.
  • FIG. 8 is a front perspective view of another modular refractor according to various embodiments.
  • FIG. 9 is a bottom perspective view of a street light according to various embodiments.
  • FIG. 10 is another perspective view of a street light according to various embodiments.
  • FIG. 11 illustrates exemplary mounting surfaces for a light module and modular refractor according to various embodiments.
  • SSL luminaires are being installed throughout the USA and around the globe. LED- based lighting is replacing traditional light sources such as incandescent, metal halide and sodium vapor lamps in ever increasing numbers. Solid State Lighting saves energy, reduces operational expenses and minimizes maintenance and its associated costs. The ruggedness, longevity and efficiency (among other qualities) of LEDs have continued to increase the number of applications and the market share of SSL luminaires. [0025] Commonly, many SSL luminaires are designed with their LEDs arrayed in simple linear patterns, which achieves only a poor approximation of the light pattern required. This may result in poor uniformity or there may light spread outside the desired area. This reduces the effective use of the available light.
  • Precise aiming of individual light emitting diodes or of small groups of light emitting diodes provides much greater control of the light pattern and more efficiently utilizes the light produced.
  • Precise aiming may be accomplished in a variety of ways including aiming platforms that are cast, molded, formed, bent or otherwise structured to provide the requisite number and position of aiming points needed to achieve the required pattern of light on the ground.
  • the LEDs of SSL luminaires have collimating lenses or compound-parabolic reflectors, spreading lenses and an external protective lens or refractor.
  • Efficacy is a measure of how efficiently a given luminaire produces light vs. the amount of electrical power consumed. Since any practical material used for lenses exhibits some loss at each lens surface, the greater number of surfaces through which the light must pass, the greater the loss of light and therefore the lower the efficacy.
  • a modular refractor 1 as shown in Figure 1 , has molded, cast or otherwise formed spreading lens areas 2 that provide the necessary control of the spread of light generated from one or more LED lighting elements located within the refractor housing. These areas may be formed on either the inside surface, the outside surface as shown in this exemplary embodiment, both surfaces or formed internally using co-molding of materials of at least two different refractive indices or formed using a gradient index (GRIN) lens molded into the modular refractor 1. While this exemplary embodiment shows a plurality of these spreading lens areas, there may embodiments wherein the number of such spreading elements differs from this exemplary embodiment including such an instance wherein there is only a single such element.
  • GRIN gradient index
  • the mounting frame 3 provides the first level of protection against the external environment along with a gasket 4, shown in Fig. 2.
  • the mounting frame 3 as depicted here is shown for illustrative purposes and may in practice take various shapes as needed to fit the requirements of a particular luminaire.
  • the mounting ears or ledges 5 in Fig. 2 are part of the modular refractor 1 and provide area for sealing against the gasket 4 and also for positioning said modular refractor on its mounting platform.
  • a metal-clad printed circuit board (PCB) 6 provides mounting for LEDs along with the circuitry which connects them.
  • the metal-clad PCB 6 is used in the exemplary embodiment in order to provide a thermally conductive path from the bases of the LEDs to the mounting platform that is allows sufficient heat removal for proper operation and longevity of the LEDs.
  • Such a PCB also insulates the operational circuitry powering the LEDs from the mounting platform.
  • An electrical connector 7 which is shown in figures 2 and 3 provides a means for connecting the LEDs inside the module to an external power source.
  • the mounting hardware 8 may be any of several various fasteners familiar to those skilled in the art and, in this exemplary embodiment, holds both the internal collimating elements to the PCB 6 and also is used to secure the PCB 6 to the mounting platform.
  • the LEDs 9 are shown in FIG. 4 and in the cross section view of Fig. 4A and are positioned within internal collimating elements 10 which in this exemplary embodiment are compound parabolic reflectors which collect and collimate the light generated by the LEDs.
  • the collimating elements may be cast or molded lenses which may be of the total internal reflection type. These lenses may be independent from the modular refractor or may be part of the same mold or casting, thereby reducing even further the number of surfaces through which the light must pass.
  • the spreading lens area 2 then disperses or spreads the light to the extent needed to meet the requirements of this module for a given luminaire design.
  • the inner gasket 11 shown in Figures 4 and 5 seals the modular refractor 1 to the PCB 6 providing an additional level of protection against the external environment and thereby creating an individually sealed module.
  • the inside of this module is shown in Figures 6 and 7.
  • Also shown in these figures are internal electrical connections 12 which are soldered directly to the metal-clad PCB and provide a means to connect the LEDs mounted on the PCB 6 to be powered from the external connector 7. Not shown for clarity are the electrical wires connecting said connectors. In other possible embodiments, another implementation of an external connector 7 may itself be soldered directly to the PCB 6.
  • the mounting ears or ledges 5 of the modular refractor 1 are shown without the mounting plate in Fig. 8. In other embodiments, these may vary in relative dimension from that shown in this exemplary embodiment. Other embodiments of the modular refractor 1 may also differ from the rectangular form shown in this exemplary embodiment. These alternative forms may be square, circular, hexagonal, triangular or whatever other shape may be needed to fit the requirements of a given luminaire 's design. It is given that the components internal to the modular refractor would be rearranged, altered or otherwise constructed so as to fit with the alternative shape of the modular refractor.
  • the modular refractor assemblies 13 are mounted to an aiming platform 14 which orients each module so as to achieve the required pattern of light on the ground and also provides a thermally conductive path to the housing 15 which provides structural support, thermal conductivity and thermal dissipation.
  • the housing 15 may be cast, molded, machined, sintered or formed in some other fashion and of a material that provides both the necessary mechanical strength and also the required thermal conductivity, typically aluminum.
  • the housing 15 is then covered by an external skin 16 that provides both the desired aesthetic as well as additional protection from the environment.
  • a mounting frame 17 that may be sectional as shown in the exemplary embodiment or may be a single piece or a plurality of individual pieces, depending upon the requirements of a given luminaire's design.
  • the sectional mounting frame 17 was conceptually represented in earlier figures by a simplified mounting frame 3 and is backed by a gasket or gaskets functionally similar to the gasket 4 shown in earlier figures.
  • Figure 11 depicts said sectional mounting frame 17 independent of the rest of the luminaire assembly. Openings 19 in the frame are sized appropriately to accommodate the modular refractor assemblies.
  • the connectors mounted on the aiming platform 14 which would mate to the connectors 7 on the modular refractor assemblies 13. These mating connectors would be positioned so as to allow the modular refractor assemblies 13 to plug into the aiming platform 14 to establish the requisite electrical connections to power the LEDs.
  • the connectors mounted on the aiming platform 14 would be wired together in the appropriate configuration to optimize power utilization. This wiring would be run in the area 18 behind the modular refractor assemblies 13 and would be protected from the environment by the mounting frame 17, as will be readily understood by one of skill in the art.

Abstract

La présente invention concerne des luminaires d'éclairage à semi-conducteurs, et leurs procédés de construction, les luminaires d'éclairage à semi-conducteurs possédant une efficacité améliorée grâce à la réduction du nombre de surfaces de lentilles que doit traverser la lumière tout en fournissant la protection nécessaire contre l'environnement. Des réfracteurs modulaires sont prévus comprenant des composants optiques qui peuvent être couplés avec des modules d'éclairage. Les réfracteurs modulaires peuvent fournir une protection environnementale aux composants d'éclairage contenus dans le réfracteur, et une lentille de protection externe séparée n'est donc pas nécessaire. Une ou des lentille(s) d'un ou de plusieurs réfracteur(s) modulaire(s) peut/peuvent comporter des matériaux d'au moins deux indices de réfraction différents qui sont moulés conjointement.
EP13816884.4A 2012-07-09 2013-07-09 Luminaire d'éclairage à semi-conducteurs avec réfracteurs modulaires Withdrawn EP2870406A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201261669555P 2012-07-09 2012-07-09
PCT/US2013/049776 WO2014011670A1 (fr) 2012-07-09 2013-07-09 Luminaire d'éclairage à semi-conducteurs avec réfracteurs modulaires

Publications (2)

Publication Number Publication Date
EP2870406A1 true EP2870406A1 (fr) 2015-05-13
EP2870406A4 EP2870406A4 (fr) 2015-06-03

Family

ID=49916514

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13816884.4A Withdrawn EP2870406A4 (fr) 2012-07-09 2013-07-09 Luminaire d'éclairage à semi-conducteurs avec réfracteurs modulaires

Country Status (3)

Country Link
EP (1) EP2870406A4 (fr)
CN (1) CN104822984A (fr)
WO (1) WO2014011670A1 (fr)

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008036020A1 (de) * 2007-12-18 2009-06-25 Osram Opto Semiconductors Gmbh Optoelektronisches Modul und Beleuchtungsvorrichtung
WO2009081382A1 (fr) * 2007-12-22 2009-07-02 Philips Solid-State Lighting Solutions Inc. Luminaires à led destinés à l'éclairage architectural de grande envergure
KR100945732B1 (ko) * 2008-06-04 2010-03-05 (주)유양디앤유 Ｌｅｄ용 렌즈매트릭스를 이용한 실외등, 보안등, 터널등, 공원등, 경계등, 산업용 투광등 및 가로등
WO2010124294A2 (fr) * 2009-04-24 2010-10-28 Sunovia Energy Technologies, Inc. Unité d'éclairage à semi-conducteurs incorporant des éléments d'étalement optique
CN101556023A (zh) * 2009-05-14 2009-10-14 上海广电光电子有限公司 带广角透镜的led光源
KR101066231B1 (ko) * 2009-06-08 2011-09-21 에이피엘시스템(주) 집광식 엘이디램프
KR100950574B1 (ko) * 2009-07-29 2010-04-01 주식회사 아이에스시테크놀러지 아웃도어용 전등
KR101123077B1 (ko) * 2009-09-30 2012-03-16 주식회사 아모럭스 블록 조립 구조를 갖는 ｌｅｄ 조명장치
CN102052591A (zh) * 2009-11-05 2011-05-11 富士迈半导体精密工业（上海）有限公司 固态照明灯具
DE102010001860A1 (de) * 2010-02-11 2011-08-11 ewo srl/Gmbh, BZ Leuchtmodul zur Verkehrswegebeleuchtung und Verkehrswegeleuchte
DE202010004874U1 (de) * 2010-04-11 2010-07-22 Lightdesign Solutions Gmbh LED-Modul mit Passiv-LED
US8303130B2 (en) * 2010-10-05 2012-11-06 Cooper Technologies Company Modular optical system for use with light emitting diodes in at least a wall wash configuration
JP5827104B2 (ja) * 2010-11-19 2015-12-02 株式会社半導体エネルギー研究所 照明装置

Also Published As

Publication number Publication date
WO2014011670A1 (fr) 2014-01-16
CN104822984A (zh) 2015-08-05
EP2870406A4 (fr) 2015-06-03

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