WO2013014046A1 - Source de lumière, par exemple pour éclairer des surfaces - Google Patents

Source de lumière, par exemple pour éclairer des surfaces Download PDF

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Publication number
WO2013014046A1
WO2013014046A1 PCT/EP2012/064107 EP2012064107W WO2013014046A1 WO 2013014046 A1 WO2013014046 A1 WO 2013014046A1 EP 2012064107 W EP2012064107 W EP 2012064107W WO 2013014046 A1 WO2013014046 A1 WO 2013014046A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical stage
lighting
optical
light radiation
previous
Prior art date
Application number
PCT/EP2012/064107
Other languages
English (en)
Inventor
Simone Capeleto
Matteo CALDON
Original Assignee
Osram Ag
Osram S.P.A. - Societa' Riunite Osram Edison Clerici
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 Osram Ag, Osram S.P.A. - Societa' Riunite Osram Edison Clerici filed Critical Osram Ag
Priority to EP12738098.8A priority Critical patent/EP2737246A1/fr
Publication of WO2013014046A1 publication Critical patent/WO2013014046A1/fr

Links

Classifications

    • 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
    • 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
    • F21V5/008—Combination of two or more successive refractors along an optical axis
    • 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
    • F21V7/0025—Combination of two or more reflectors for a single light source
    • F21V7/0033—Combination of two or more reflectors for a single light source with successive reflections from one reflector to the next or following
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
    • G02B19/0028—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed refractive and reflective surfaces, e.g. non-imaging catadioptric systems
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G02B19/0061—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED
    • 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
    • F21V7/0091—Reflectors for light sources using total internal reflection
    • 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

  • a light source for example for lighting surfaces Technical field
  • the present description relates to light sources.
  • Various embodiments may relate to light sources, of the LED type for example, which can be used for lighting surfaces.
  • a solution known in the field of lighting technology is provided by the method shown schematically in Figure 1, namely by arranging for the surface S of a wall W (this term also covering a floor or a ceiling) to be lit by a source of light radiation RS which irradiates the surface S with a beam of light, thereby lighting it.
  • the light source RS can, in practice, be mounted only on a wall other than the wall W which is to be lit: for example, if the wall W is a side wall of a room, then in practice the light source RS can only be mounted on the ceiling or on the floor.
  • the light source RS can only be mounted on the ceiling or on the floor.
  • only a limited fraction of the light radiation emitted by the light source RS (indicated by UL and corresponding to the portion of the solid angle of emission of the source RS which includes the surface S) is used to light the surface S ; the remainder of the radiation, indicated by WL in Figure 1, is not used to light the surface S, and is wasted as far as this application is concerned.
  • the inventors have discovered that, as regards the first as- pect, it is possible to use shelves or brackets to support the light source RS : however, these would be additional elements which it would often be preferable to avoid, for reasons of cost and complexity of installation, and also because they may be intrusive in the environment in which they are installed.
  • the inventors have also observed that the fact that much of the radiation emitted by the light source RS does not reach the surface S can be remedied to some extent by mounting the light source RS on an orientable support such that the beam of light radiation from the source RS can be directed more satisfactorily onto the surface S: however, this solution leads to a non-uniform distribution of lighting on the surface S, whereas the desired wall washing effect usually re- quires lighting to be as uniform as possible.
  • the object of the invention is to overcome the aforesaid dis- advantages.
  • the light radiation produced by the radiation source is mostly used to irradiate the surface to be lit, thus making it possible to reduce the power, and therefore the absorption, of the light radiation source,
  • the lighting device can be mounted at any height with respect to the surface to be lit, and it is possible to mount the source on the surface itself;
  • various embodiments enable a plurality of functions to be integrated into a simple and compact optical system, making it possible to use, for example, optical components made of low- cost plastic material by a molding process.
  • FIG. 1 is a perspective view of an embodiment
  • FIG. 6 shows the methods of operation of some embodiments .
  • the reference numeral 10 indicates a lighting device which can be used to light a surface S according to the solution known as "wall washing" to which reference has already been made in the introductory part of the present description.
  • the device 10 can be used, for example, according to the principles illustrated schematically with reference to the light source RS in Figure 1, while overcoming the intrinsic drawbacks of this solution (such as the limitations regarding mounting, and the dispersion of much of the light radiation produced by the source and not used for the desired effect) .
  • the device 10 can include, in addition to a light radiation source 12 (which can be formed, for example, by an LED light radiation source) , an optical system having three stages which can substantially be identified as follows : - a first optical stage 14, acting as a collimator of the radiation produced by the source 12,
  • a third optical stage 18 which receives the beam deflected by the second optical stage 16 and distributes it spatially, for example in order to achieve an effect of uniform lighting of the surface S .
  • the first stage (collimator stage) 14 can be constructed as shown schematically in Figure 3.
  • the stage 14 can allow for the fact that the light radiation produced by a source such as an LED light source 12 is distributed with a light radiation pattern which can include: an "inner” (or central) portion concentrated about the principal axis of radiation X12 of the source 12, and
  • the stage 14 can have the function of concentrating the light radiation produced by the source 12, by collimating it along the axis X12.
  • optical systems capable of providing this function are known: see, for example, the following documents: EP 2 180 232 Al , US 2008/198604 Al , WO 2006/131501 Al , US 2007/114551 Al , JP 2005 216 782 A, US 2006/050530 Al , US 5 939 996 and US 2008/074896 Al .
  • the stage 14 can include:
  • a portion 14a operating by refraction in practice, a lens which can be produced in a wide range of possible known morphologies, which acts on the inner portion of the emission beam of the source 12 to direct this inner portion of radia- tion along the axis X12, and/or
  • a portion 14b operating by reflection for example, a deflector produced in a wide range of possible known morphologies, such as a parabolic reflector, which is struck by the outer portion of the radiation beam emitted by the source 12 and acts by redirecting this outer portion of radiation along the axis X12.
  • the overall effect is to generate, from the radiation gener- ated by the source 12, a beam of light radiation which is completely collimated, or has a reduced residual divergence, this beam being indicated as a whole by LC .
  • the collimated beam LC is sent toward the second optical stage 16 which includes, for example, a reflective surface.
  • the reflective surface in question can be formed by one of the faces of a prism structure 20, for example a prism of transparent material such as a transparent thermoplastic material, which has (see, in particular, Figure 4) :
  • the prism 20 can be made either as a solid structure or as a hollow structure, for example in the form of a bowl-shaped body in which the surface 20a is the input aperture and the walls 20b and 20c are two side walls.
  • the deflection geometry described by way of example herein with reference to the stage 16 can have different characteristics from those described herein, for example characteristics such that deflection can be provided at an angle other than the angle of 90° illustrated by way of example in the drawings .
  • Figure 2 (together with Figure 5, which can be seen substantially as a view from above of the solution shown in Figure 2) clearly shows that, in various embodiments, the third optical stage 18, which is intended to diffuse or spread the deflected beam LD so as to create the spread beam LS, can use bar-like lenses 180 adjacent to each other in an array of lens elements which extend in a direction approximately orthogonal to the input surface 20a of the structure 20.
  • the output surface 20c of said third optical stage 18 has a rectangular shape which is helpful if a rectangular area is to be lit.
  • the aforesaid bar-like lenses 180 can have a curved configu- ration in order to provide not only a modeling or shaping which is "horizontal" (in other words, in a first direction), as shown schematically in Figure 6, but also a modeling effect in a "vertical" direction (in other words, in a second direction) .
  • the first modeling effect can be spreading for the purpose of distributing the beam LS along the sides of the device 10.
  • the second modeling effect can be intended for modeling the beam LS (by narrowing it if necessary, as shown schematically in Figure 4), in order to obtain a substantially uniform intensity not only on the parts of the surface S closer to the device 10, but also on the parts of the surface S which are more remote from the device 10.
  • Various embodiments can also offer a wide range of possibilities for varying the characteristics of the stage 18 in order to modify the effect of spreading and/or narrowing the beam LS according to the user's requirements.
  • the introductory part of the present description refers to the aim of achieving an effect of irra- diation or "washing" of the surface S which is as uniform as possible in terms of lighting intensity
  • various embodiments allow the distribution of the lighting to be varied.
  • these arrangements overcome the intrinsic limitations of the solutions referred to in the introductory part of the present description, which in practice are constrained by an intrinsically non-uniform distribution of the lighting, wherein the portions of the surface S closer to the source RS are inevitably lit in a less intense manner than the more remote portions.
  • Various embodiments allow the distribution of the lighting of the surface S to be modified as desired, making it possible to change, for example, from a uniform distribution to a lighting distribution in which the parts of the surface S more remote from the device 10 are lit less intensely than the closer portions, with a wide range of possible intermediate solutions.
  • the aforesaid modification methods for the purpose of obtaining possible desired effects of focusing the light radiation beam can be carried out not only at the third stage 18 but also at the other two optical stages 14 and 16, thus considerably enhancing the flexibility of the device.
  • An additional degree of flexibility can be achieved by modifying not only the optical systems described herein (the lenses and/or reflectors, in other words the active parts of the optical system) but also the supports of these parts, thus enabling the active parts to be made interchangeable if necessary within a single support structure, in such a way that different lighting effects can be achieved while using the same support structure, according to the user's requirements .

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

La présente invention concerne un dispositif d'éclairage pour éclairer une surface (S), comprenant : - une source de rayonnement lumineux (12) pour produire un rayonnement lumineux, - un premier étage optique (14) pour collecter le rayonnement lumineux et produire un faisceau lumineux collimaté (CL) à partir de celui-ci, - un second étage optique (16) pour dévier le faisceau collimaté (LC) et générer un faisceau lumineux dévié (LD), et - un troisième étage optique (18) pour propager le faisceau dévié (LD) et générer un faisceau d'éclairage propagé (LS) pour éclairer ladite surface (S).
PCT/EP2012/064107 2011-07-25 2012-07-18 Source de lumière, par exemple pour éclairer des surfaces WO2013014046A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12738098.8A EP2737246A1 (fr) 2011-07-25 2012-07-18 Source de lumière, par exemple pour éclairer des surfaces

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO2011A000666 2011-07-25
ITTO20110666 2011-07-25

Publications (1)

Publication Number Publication Date
WO2013014046A1 true WO2013014046A1 (fr) 2013-01-31

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Country Status (2)

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EP (1) EP2737246A1 (fr)
WO (1) WO2013014046A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140192521A1 (en) * 2013-01-10 2014-07-10 Ledil Oy Light guide element
CN104566216A (zh) * 2014-12-31 2015-04-29 华侨大学 一种非对称型led路灯透镜
EP2818792A3 (fr) * 2013-06-11 2015-11-18 Stanley Electric Co., Ltd. Unité d'éclairage de véhicule
AT518109A1 (de) * 2016-01-14 2017-07-15 Zkw Group Gmbh Beleuchtungseinheit für einen Kraftfahrzeugscheinwerfer zum Erzeugen eines Lichtbündels mit Hell-Dunkel-Grenze
WO2017185118A1 (fr) * 2016-04-29 2017-11-02 Zkw Group Gmbh Unité d'éclairage destinée à un phare de véhicule automobile pour générer un faisceau de lumière à coupure clair-obscur
WO2018032025A1 (fr) * 2016-08-19 2018-02-22 Zkw Group Gmbh Unité d'éclairage pour un projecteur de véhicule automobile, destinée à produire au moins deux distributions de lumière

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104718410A (zh) * 2012-10-19 2015-06-17 皇家飞利浦有限公司 用于间接照明的光照设备

Citations (12)

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Publication number Priority date Publication date Assignee Title
EP0117606A1 (fr) * 1983-01-28 1984-09-05 Xerox Corporation Collecteur pour photodiodes groupées par rangées
US5939996A (en) 1996-03-29 1999-08-17 Rolls-Royce Power Engineering Plc Display sign and an optical element for use in the same
JP2005216782A (ja) 2004-01-30 2005-08-11 Toyoda Gosei Co Ltd Ｌｅｄランプ装置
US20060050530A1 (en) 2004-08-30 2006-03-09 Schefenacker Vision Systems Germany Gmbh Lighting unit having a plurality of curved surface elements
US20060061990A1 (en) * 2004-09-20 2006-03-23 Jeyachandrabose Chinniah LED bulb
WO2006131501A1 (fr) 2005-06-07 2006-12-14 Siemens Vdo Automotive Ag Systeme generateur de lumiere
US20070114551A1 (en) 2005-11-18 2007-05-24 Yoshifumi Kawaguchi White led illumination device
US20070292100A1 (en) * 2006-06-20 2007-12-20 Canon Kabushiki Kaisha Illuminating apparatus and surface inspection system using illuminating apparatus
US20080074896A1 (en) 2006-09-26 2008-03-27 Koito Manufacturing Co., Ltd. Light emitting module of vehicle headlamp
US20080198604A1 (en) 2007-02-20 2008-08-21 Sekonix Co., Ltd. Lighting apparatus using filter and condenser for led illumination
WO2010010494A1 (fr) * 2008-07-24 2010-01-28 Koninklijke Philips Electronics N.V. Luminaire doté de plusieurs unités d’éclairage
EP2180232A1 (fr) 2008-10-16 2010-04-28 Osram Gesellschaft mit Beschränkter Haftung Dispositif d'éclairage avec LED et micro-lentilles

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0117606A1 (fr) * 1983-01-28 1984-09-05 Xerox Corporation Collecteur pour photodiodes groupées par rangées
US5939996A (en) 1996-03-29 1999-08-17 Rolls-Royce Power Engineering Plc Display sign and an optical element for use in the same
JP2005216782A (ja) 2004-01-30 2005-08-11 Toyoda Gosei Co Ltd Ｌｅｄランプ装置
US20060050530A1 (en) 2004-08-30 2006-03-09 Schefenacker Vision Systems Germany Gmbh Lighting unit having a plurality of curved surface elements
US20060061990A1 (en) * 2004-09-20 2006-03-23 Jeyachandrabose Chinniah LED bulb
WO2006131501A1 (fr) 2005-06-07 2006-12-14 Siemens Vdo Automotive Ag Systeme generateur de lumiere
US20070114551A1 (en) 2005-11-18 2007-05-24 Yoshifumi Kawaguchi White led illumination device
US20070292100A1 (en) * 2006-06-20 2007-12-20 Canon Kabushiki Kaisha Illuminating apparatus and surface inspection system using illuminating apparatus
US20080074896A1 (en) 2006-09-26 2008-03-27 Koito Manufacturing Co., Ltd. Light emitting module of vehicle headlamp
US20080198604A1 (en) 2007-02-20 2008-08-21 Sekonix Co., Ltd. Lighting apparatus using filter and condenser for led illumination
EP1962014A1 (fr) * 2007-02-20 2008-08-27 Sekonix Co., Ltd. Appareil d'éclairage utilisant un filtre et condensateur pour l'éclairage de la DEL
WO2010010494A1 (fr) * 2008-07-24 2010-01-28 Koninklijke Philips Electronics N.V. Luminaire doté de plusieurs unités d’éclairage
EP2180232A1 (fr) 2008-10-16 2010-04-28 Osram Gesellschaft mit Beschränkter Haftung Dispositif d'éclairage avec LED et micro-lentilles

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140192521A1 (en) * 2013-01-10 2014-07-10 Ledil Oy Light guide element
EP2818792A3 (fr) * 2013-06-11 2015-11-18 Stanley Electric Co., Ltd. Unité d'éclairage de véhicule
CN104566216A (zh) * 2014-12-31 2015-04-29 华侨大学 一种非对称型led路灯透镜
AT518109B1 (de) * 2016-01-14 2017-11-15 Zkw Group Gmbh Beleuchtungseinheit für einen Kraftfahrzeugscheinwerfer zum Erzeugen eines Lichtbündels mit Hell-Dunkel-Grenze
WO2017120630A1 (fr) * 2016-01-14 2017-07-20 Zkw Group Gmbh Unité d'éclairage destinée à un phare de véhicule automobile pour générer un faisceau de lumière à frontière clair-obscur
AT518109A1 (de) * 2016-01-14 2017-07-15 Zkw Group Gmbh Beleuchtungseinheit für einen Kraftfahrzeugscheinwerfer zum Erzeugen eines Lichtbündels mit Hell-Dunkel-Grenze
WO2017185118A1 (fr) * 2016-04-29 2017-11-02 Zkw Group Gmbh Unité d'éclairage destinée à un phare de véhicule automobile pour générer un faisceau de lumière à coupure clair-obscur
KR20180132149A (ko) * 2016-04-29 2018-12-11 제트카베 그룹 게엠베하 명-암 경계가 있는 광 다발을 만들어내기 위한 자동차 헤드라이트용 조명 유닛
CN109073184A (zh) * 2016-04-29 2018-12-21 Zkw集团有限责任公司 用于机动车探照灯的用于产生具有明暗限界的光束的照明单元
KR102195489B1 (ko) 2016-04-29 2020-12-30 제트카베 그룹 게엠베하 명-암 경계가 있는 광 다발을 만들어내기 위한 자동차 헤드라이트용 조명 유닛
WO2018032025A1 (fr) * 2016-08-19 2018-02-22 Zkw Group Gmbh Unité d'éclairage pour un projecteur de véhicule automobile, destinée à produire au moins deux distributions de lumière
CN109563974A (zh) * 2016-08-19 2019-04-02 Zkw集团有限责任公司 用于产生至少两种光分布的用于机动车前照灯的照明单元
US10605428B2 (en) 2016-08-19 2020-03-31 Zkw Group Gmbh Lighting unit for a motor vehicle headlight for generating at least two light distributions

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