EP2956711A1 - Optique pour source lumineuse del - Google Patents

Optique pour source lumineuse del

Info

Publication number
EP2956711A1
EP2956711A1 EP14705336.7A EP14705336A EP2956711A1 EP 2956711 A1 EP2956711 A1 EP 2956711A1 EP 14705336 A EP14705336 A EP 14705336A EP 2956711 A1 EP2956711 A1 EP 2956711A1
Authority
EP
European Patent Office
Prior art keywords
light
lens body
optics
emission
light source
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Withdrawn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
EP14705336.7A
Other languages
German (de)
English (en)
Inventor
Katharina Keller
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.)
Zumtobel Lighting GmbH Austria
Original Assignee
Zumtobel Lighting GmbH Austria
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 Zumtobel Lighting GmbH Austria filed Critical Zumtobel Lighting GmbH Austria
Publication of EP2956711A1 publication Critical patent/EP2956711A1/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Withdrawn legal-status Critical Current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
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
    • 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
    • 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
    • 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 present invention relates to an optic for influencing the light output of an LED light source comprising e.g. having a truncated cone-like lens body, one of the LED light source facing Lichteinkoppel composition and one of the
  • a special feature of LEDs is that the light output in the different directions of the approximately hemispherical area in which the light is emitted is uneven with respect to the color or color temperature of the emitted light.
  • white light LEDs so- possibly under
  • white light e.g. White light
  • white light with a lower color temperature which is more in the yellowish range, rather laterally emitted.
  • the present invention is therefore based on the object to improve the optical systems of the prior art described above, in particular to avoid such unwanted color shades on the periphery to be illuminated areas.
  • the object is achieved by an optical system for influencing the light output of an LED light source with the features of claim 1.
  • Advantageous developments of the invention are the subject of the dependent claims.
  • the solution according to the invention is based on the finding that the above-mentioned shades of color on the circumference of an illuminated area are due to the fact that light of different color temperatures over
  • the light emission surface of the optics is subdivided into different emission regions which are shaped such that radiation bundles emitted via these emission regions each have a substantially identical region of a surface arranged in front of the optics and to be illuminated - with a preferably substantially identical illumination intensity distribution - illuminate.
  • Illumination is to be understood here as meaning that no color gradients, color temperature gradients or shades are discernible in the illuminated area, however, the brightness may certainly decrease towards the edge of the area, for example, but now - especially with an identical illumination intensity distribution - all color or Color temperature shares participate in the same way in the brightness course.
  • Proposed light output of an LED light source which is a lens body, one of the LED light source facing light input surface and one of the
  • Lichteinkoppel entering light rays total reflection acts and the Lichtabstrahlf is divided into at least two Abstrahl Schemee, which are shaped such that emitted via the Abstrahl Schemee each beam one essentially identical area of a surface arranged in front of the optics and to be illuminated - preferably with a substantially identical one
  • the lens body can in this case e.g.
  • the different emission regions of the optical system according to the invention can be formed in particular by so-called free-form surfaces. These are surfaces that do not follow a specific, mathematically definable law, but are modeled so that they ultimately lead to the desired light output. If the surface to be illuminated is arranged very far away from the optics, that is to say it is located in the so-called far field, the emission regions are preferably designed such that the emitted radiation bundles each have a substantially identical luminous intensity distribution curve. In contrast, in the case in which the surface to be illuminated is located in the so-called near field of the optics, the light intensity distribution curves are different, but coordinated in such a way that, according to the invention, identical areas are ultimately illuminated.
  • the light incoupling surface is formed by the bottom surface and a peripheral surface of a depression in which the LED light source is to be arranged.
  • FIG. 2 shows luminous intensity distribution curves for the different white light components when using the optics according to FIG. 1;
  • FIG. 3 shows an embodiment according to the invention of an optical system for influencing the light of a white light LED
  • Luminous intensity distribution curves depending on whether the area to be illuminated is located in the far field or in the near field of the optics.
  • FIG. 1 shows an optical system known from the prior art for influencing the light emission of a white light LED 150. It is an LED light source in which the light-emitting semiconductor chip 151 is surrounded by a color conversion material 152 with phosphors or phosphors contained therein which convert a part of the emitted light into light of other wavelength, so that finally, when viewed in total, mixed light is emitted as mixed light.
  • the known from the prior art optics 100 is formed frustoconical. It can be designed rotationally symmetrical or in the sense of a
  • the LED light source 150 faces a recess 105 in the
  • this optic 100 is accordingly through the peripheral surface 106 and the bottom surface 107 of the recess 105 formed.
  • These 105 recess may be formed differently in terms of the design of these surfaces and a total rotational symmetry or
  • Light beams emitted from the LED light source 150 and entering the lens body 101 are then emitted substantially in the two different ways described below.
  • light rays A enter the lens body 101 via the bottom surface 107 of the recess 105. They are hereby easily broken and accordingly changed in their direction, but then hit on the flat light exit surface 110 without being further influenced.
  • the white light LEDs discussed in detail in the present case now have the property that light of different color or color temperature is emitted to different degrees in the different directions.
  • light of a shorter wavelength that is to say bluish white light
  • bluish white light is emitted directly in such a way that, like the illustrated rays A, it enters the lens body 101 via the bottom surface 107.
  • light of lower energy which is referred to below as yellowish white light, radiates rather, and accordingly represents the light rays B, which over the peripheral surface 106 of the
  • Recess 105 pass into the lens body 101, are first totally reflected and then hit the Lichtaustrittsf ech 110. The course of the rays shown now reveals that the
  • both white light components were influenced differently with bluish white light and yellowish white light and, accordingly, also emitted differently by the optics 100.
  • the slightly different light intensity distribution curves result for the two light components, where I denotes the light intensity distribution curve for the yellowish white light and II the light intensity distribution curve for the bluish white light. It can be seen that the yellowish white light is emitted in a slightly larger angular range, which ultimately results in the aforementioned color shades occurring at the periphery of an illuminated area.
  • the light exit surface 110 of the optics 100 shown in FIG. 1 could also be concave or convex, but nevertheless the unwanted color shades would result.
  • the optical system according to the invention designated by the reference numeral 20, again consists of a lens body 1 which is formed almost identically to the lens body 101 shown in FIG.
  • the lens body 1 of the optical system according to the invention thus also has a recess 5 facing the LED light source 150 with a peripheral or peripheral surface 6 and a bottom surface 7, which may also be arched or curved.
  • the light inlet region facing the light source 150 is connected to the light exit region via a jacket surface 8.
  • the lens body may in turn be rotationally symmetrical or rather polygonal, wherein, alternatively to the illustrated form, the lens body could also be designed as a cylinder or in the form of a paraboloid.
  • the light rays run in the same manner as in the lens body according to Figure 1, as a comparison of both representations shows. Again, therefore, the light rays B are slightly lower energy, which are attributable to the yellowish white light, totally reflected on the lateral surface 8 of the lens body 1 and directed to the light exit surface 10, while the bluish white light the rays A enters via the bottom surface 7 and passes without being reflected to the light exit surface 10.
  • the light exit surface 10 of the optics 20 according to the invention now differs from the prior art in that this surface is subdivided into different emission regions, which are assigned to the respective light components.
  • a central first region 10i is provided, which is assigned to the bluish white light, while on both sides further regions 10 2 and 10 3 are formed, which are assigned to the yellowish white light components.
  • the lateral areas 10 2 and I O3 are symmetrical to each other. If it is assumed that the optical system 20 as a whole is designed to be rotationally symmetrical, then the lateral regions 10 2 and I O 3 form an associated outer region which surrounds the first region 10i in an annular manner.
  • the different emission areas of the light emission surface 10 are the same.
  • each region of the emission surface 10 is thus designed such that the light emitted via it exactly illuminates exactly one area to be illuminated, whereby a substantially identical illumination intensity distribution on the illuminated surface preferably exists for the different radiation bundles.
  • the light beams of the different white light components are exactly superimposed, so that no more shades of color occur in the edge region.
  • a relatively uniformly illuminated area results, which is homogeneously illuminated with white light over its entire area.
  • this does not mean that the brightness in the illuminated area must be the same everywhere. This may well be a - e.g. outwardly sloping course, although preferably all the light components in the same way to this
  • FIGS. 4a to 4c The effect of the optics 20 according to the invention is shown schematically in FIGS. 4a to 4c, wherein in FIG. 4a it is assumed that the surface to be illuminated is located relatively far away from the optics 20 according to the invention, ie in the so-called far field. It can be seen that the radiation beams emitted via the different emission areas 10i to 10 3 are each of identical design, ie - as shown in FIG. 4b - have the same luminous intensity distribution curve I lj2j3 . Accordingly, exactly the same area is illuminated in the far field, wherein due to the large distance, it does not matter that the emission areas 10i to 10 are adjacent to one another.
  • the emission regions are to be designed in such a way that
  • the specially designed emission areas are in particular so-called free-form surfaces which have been optimized in a corresponding manner in order to achieve the desired effect. These must be adapted in view of the shape of the lens body to achieve the desired light output.
  • the optical element according to the invention after appropriate shaping of the
  • Injection molding process can be produced.
  • the inventively configured optics need not necessarily have the LED facing recess. Instead, the LED could also be arranged outside the optics, in which case the eg flat light entry surface can be provided with facets or otherwise structured. It should also be mentioned that the total reflections on the lateral surface of the optical element have an advantageous effect, since in this way the different
  • Light emitting surfaces could be made only minor adjustments within a limited range.
  • This effect of the total reflections can also be used for all different color components or color temperature components by providing the lens body with a recess which is open towards the light emission side.
  • the shape of the lens body is open towards the light emission side.
  • Lens body is then e.g. chosen such that all light rays on the
  • Mantle surface of the lens body directed and totally reflected there. Again, due to the angular dependence in the light output of the LED light source, these light rays strike the light exit surface in different areas, the light beams e.g. the yellowish white light possibly even on the peripheral surface of the Lichtabstrahlseite facing recess a second time be totally ref ected. Also in this case are then different at the light exit surface
  • Abstrahl Clube and formed which are each responsible for the light output of the various beams and in turn are designed such that the emitted from the optics bundles exactly overlap on a surface to be illuminated.

Landscapes

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

Abstract

L'invention concerne une optique (20) destinée à influencer l'émission de lumière d'une source lumineuse DEL (150), l'optique présentant un corps de lentille (1) qui présente une surface d'injection de lumière orientée vers la source lumineuse DEL (150) ainsi qu'une surface d'émission de lumière (10) opposée à la surface d'injection de lumière. Une surface extérieure (8) du corps de lentille (1) agit de manière totalement réfléchissante au moins pour une partie des rayons lumineux entrant par la surface d'injection de lumière et la surface d'émission de lumière (10) est subdivisée en au moins deux zones d'émission (101, 102, 103) séparées qui sont formées de manière que les faisceaux de rayons émis par ces zones d'émission (101, 102, 103) éclairent chacun une région sensiblement identique d'une surface (200) à éclairer disposée devant l'optique (20).
EP14705336.7A 2013-02-18 2014-02-18 Optique pour source lumineuse del Withdrawn EP2956711A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013202563.7A DE102013202563A1 (de) 2013-02-18 2013-02-18 Optik für LED-Lichtquelle
PCT/EP2014/053086 WO2014125115A1 (fr) 2013-02-18 2014-02-18 Optique pour source lumineuse del

Publications (1)

Publication Number Publication Date
EP2956711A1 true EP2956711A1 (fr) 2015-12-23

Family

ID=50137642

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14705336.7A Withdrawn EP2956711A1 (fr) 2013-02-18 2014-02-18 Optique pour source lumineuse del

Country Status (3)

Country Link
EP (1) EP2956711A1 (fr)
DE (1) DE102013202563A1 (fr)
WO (1) WO2014125115A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015204665A1 (de) * 2015-03-16 2016-09-22 Zumtobel Lighting Gmbh Optisches Element zur Beeinflussung der Lichtabgabe von Leuchtmitteln
DE102015204690A1 (de) * 2015-03-16 2016-09-22 Zumtobel Lighting Gmbh Optisches Element zur Beeinflussung der Lichtabgabe von Leuchtmitteln

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201145210Y (zh) * 2008-01-07 2008-11-05 鹤山丽得电子实业有限公司 一种配光透镜
WO2011076214A1 (fr) * 2009-12-21 2011-06-30 Martin Professional A/S Capteur de lumière à lentille centrale pourvue d'une extension

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7329904B2 (en) * 2004-01-30 2008-02-12 Toyoda Gosei Co., Ltd. LED lamp device
JP2007265964A (ja) * 2006-02-28 2007-10-11 Toshiba Lighting & Technology Corp 照明装置
JP5254744B2 (ja) * 2008-10-31 2013-08-07 株式会社エンプラス 照明用レンズおよびこれを備えた照明装置
JP2010170734A (ja) * 2009-01-20 2010-08-05 Panasonic Electric Works Co Ltd Ｌｅｄ照明装置
DE102009017495B4 (de) * 2009-02-11 2020-07-09 Osram Opto Semiconductors Gmbh Beleuchtungseinrichtung
JP5023134B2 (ja) * 2009-10-27 2012-09-12 株式会社遠藤照明 Ｌｅｄ配光レンズ、そのｌｅｄ配光レンズを備えたｌｅｄ照明モジュール及びそのｌｅｄ照明モジュールを備えた照明器具

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201145210Y (zh) * 2008-01-07 2008-11-05 鹤山丽得电子实业有限公司 一种配光透镜
WO2011076214A1 (fr) * 2009-12-21 2011-06-30 Martin Professional A/S Capteur de lumière à lentille centrale pourvue d'une extension

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2014125115A1 *

Also Published As

Publication number Publication date
DE102013202563A1 (de) 2014-08-21
WO2014125115A1 (fr) 2014-08-21

Similar Documents

Publication Publication Date Title
EP2729838B1 (fr) Élément optique
EP2726779B1 (fr) Ensemble émetteur de lumière à sources de lumière ponctuelles et élément de guidage de lumière
DE102010028755B4 (de) Linsenelement und optische Einheit, die das Linsenelement verwendet
DE102009017495A1 (de) Beleuchtungseinrichtung
EP3531012B1 (fr) Dispositif d'éclairage pour véhicules automobiles pourvu de guide de lumière allongé
DE102014200369A1 (de) Flächenleuchtvorrichtung mit flächigem Lichtleiter
EP2681605B1 (fr) Ensemble optique et procédé de balayage optique d'un plan d'objet au moyen d'un système d'imagerie à plusieurs canaux
DE102011006643A1 (de) Optisches Element und Leuchtvorrichtung
EP3408584A1 (fr) Appareil d'éclairage muni d'un élément de recouvrement pyramidal ou conique
WO2014125115A1 (fr) Optique pour source lumineuse del
DE4312889B4 (de) Vorwiegend direkt strahlende Leuchte mit einem abgehängten Lichtleitkörper
DE102015106022A1 (de) Abstrahleinheit für eine Operationsleuchte
EP3212997B1 (fr) Élément optique ainsi qu'ensemble d'émission de lumière comprenant un élément optique
EP3149530B1 (fr) Corps optique doté d'une optique à lentilles et module d'éclairage présentant le corps optique
EP2650602B1 (fr) Lampe avec LEDs et optiques de collimation
AT505529B1 (de) Optikelement zur beleuchtung eines fahrzeugkennzeichens
DE102018113151B4 (de) Leuchtenmodul für eine Kraftfahrzeugleuchte
EP4409198A1 (fr) Lampe médicale
WO2015090867A1 (fr) Lampe comprenant une source lumineuse optoélectronique et une isotropie d'émission améliorée
DE202014000665U1 (de) LED-Leuchte mit einer Totalreflexions-Optik und verschachtelten Lichtumlenkflächen zur Herstellung von beliebigen Lichtaustrittsflächen
EP3719391A1 (fr) Module de feu de route partiel pour un phare de véhicule automobile
DE10043027A1 (de) Lichtumlenkanordnung
AT15384U1 (de) Anordnung zur Lichtabgabe
DE102015218009A1 (de) Halbleiterlampe
DE202011106325U1 (de) Beleuchtungsvorrichtung

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20150814

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20170123

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20180224

RIC1 Information provided on ipc code assigned before grant

Ipc: F21V 5/04 20060101AFI20140829BHEP

Ipc: F21Y 101/02 20000101ALI20140829BHEP

Ipc: G02B 19/00 20060101ALI20140829BHEP

Ipc: F21V 7/00 20060101ALI20140829BHEP