EP1999406B1 - A light fitting - Google Patents

A light fitting Download PDF

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Publication number
EP1999406B1
EP1999406B1 EP06824596A EP06824596A EP1999406B1 EP 1999406 B1 EP1999406 B1 EP 1999406B1 EP 06824596 A EP06824596 A EP 06824596A EP 06824596 A EP06824596 A EP 06824596A EP 1999406 B1 EP1999406 B1 EP 1999406B1
Authority
EP
European Patent Office
Prior art keywords
light
crests
crest
glass cover
reflector
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.)
Not-in-force
Application number
EP06824596A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1999406A4 (en
EP1999406A1 (en
Inventor
Lars A Bergkvist
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.)
Prismalence AB
Original Assignee
Prismalence AB
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 Prismalence AB filed Critical Prismalence AB
Priority to PL06824596T priority Critical patent/PL1999406T3/pl
Publication of EP1999406A1 publication Critical patent/EP1999406A1/en
Publication of EP1999406A4 publication Critical patent/EP1999406A4/en
Application granted granted Critical
Publication of EP1999406B1 publication Critical patent/EP1999406B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F21V5/02—Refractors for light sources of prismatic 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
    • 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
    • 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
    • F21V5/00—Refractors for light sources
    • F21V5/08—Refractors for light sources producing an asymmetric light distribution
    • 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
    • F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • 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
    • 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
    • F21W2131/1005—Outdoor lighting of working places, building sites 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
    • 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

Definitions

  • the present invention relates to a light fitting.
  • light fittings or light fixtures intended for different purposes such as the illumination of roads, signs, the facades of buildings etc.
  • the light fitting or light fixture is dimensioned to illuminate the intended area, which means that in addition to illuminating the area intended there is generated a large amount of stray incident light on areas outside the intended area.
  • the International application PCT/SE03/01052 describes a light fitting which satisfactorily solves these two problems.
  • the application describes a light fitting or light fixture that includes a light source, a reflector and a glass cover wherein the light source is of a generally punctiform configuration and wherein the reflector is designed for the emission of parallel light from the reflector.
  • the surface of the glass cover includes a large number of lenses, each of which has a square or rectangular shape as seen in the direction of the light transmitted from the reflector and is adapted to diffract the asymmetry of the light so that a square or rectangular area on a surface perpendicular to the optical axis of the lens will be illuminated.
  • EP 0 846 914 discloses a lightning device to form a defined rectangular pattern, which lightning device a screen with either one or both surfaces having an array of cylindrical microlences or microprisms.
  • the present invention provides a light fitting that provides much more uniform illumination of an area than conventional light fittings.
  • the present invention thus relates to a light fitting or light fixture comprising a light source, a reflector and a glass cover, wherein the light source has a generally punctiform configuration, wherein the surface of the glass cover includes a large number of lenses which are intended to diffract the light asymmetrically so as to illuminate a rectangular or square area at right angles to the optical axis of respective lenses, where the glass cover includes mutually parallel and upwardly projecting crests formed of two mutually opposing side surfaces that are angled with respect to one another; and wherein the invention is characterized in that each crest has a wave form in the longitudinal direction of the crest such that the height of the crest will vary; in that the bottom surface between two mutually adjacent crests has a corresponding wave form so that the height of said bottom surfaces will also vary; in that the width of the crest at its bases is constant or varying, meaning that the side surfaces of the crests will have a wave form that corresponds to the height variations of respective crests; wherein each wave section of a
  • the light source 2 has a generally punctiform configuration.
  • Preferred light sources are gas discharge lamps that have a high luminous efficiency and a concentrated discharge.
  • MPXL Micro Power Xenon Light
  • CDM Code Discharge Metalhalid
  • These light sources have a light spectrum that lies close to that of daylight or natural light.
  • the reflector 3 is parabolic so that the light outputted by the reflector will be parallel.
  • the surface of the glass cover 4 includes a large number of lenses 5 which are intended to diffract the light asymmetrically such as to illuminate a rectangular square area that lies at right angles to the optical axis 6 of each lens 5.
  • the lenses 5 in the glass cover include mutually parallel upwardly projecting crests 7 formed by two opposing side surfaces 8, 9 that are angled to one another.
  • Each crest 7 has a wave form in the longitudinal direction of the crest such as to vary the height of respective crests.
  • the bottom surface 12 between two mutually adjacent crests has a corresponding wave shape so that the height of said bottom surface will also vary. This is illustrated in figure 6 .
  • the width of respective crests 7 at their base 10 is either constant or varies, meaning that the side surfaces 8, 9 of the crests 7 will have a wave form corresponding to the height variations of the crests.
  • Each wave section of a crest 7 therewith forms a prism for diffracting incident light from the reflector 3, wherewith the top angle of the crests 7 result in the propagation of light in a first direction and the wave form of the side surfaces 8, 9 of the crests 7 cause light to propagate in a second direction at right angles to the first direction, wherewith light from each prism illuminates a part of the illuminated surface or area.
  • each side surface 8, 9 of each wave section of a crest is outwardly convex, such that said side surfaces 8, 9 will define a double-curved surface.
  • the side surfaces 8, 9 of the crests have a varying inclination with regard to the surface 11 from which they project upwardly in the longitudinal direction of the crests above the surface 11 from the centre of said surface and outwardly towards the periphery 12 of the surface.
  • Figure 4 shows in full lines a cross-section of a crest 7 which has a height H at its highest point.
  • the figure shows in broken lines a cross-section of the same crest at a distance along the crest from the position at which the crest has its highest point, wherein the crest has a height h.
  • the width of the crests 7 vary at their respective bases 10 across the surface 11 from which the crests 7 project upwards from the centre of the surface and outwards towards the periphery 12 of said surface.
  • Figure 5 shows in full lines a cross-section of a crest 7 that has a highest point H.
  • the figure also shows in broken lines a cross-section of the same crest at a distance along the crest from the position in which the crest is at its highest, wherein the crest has a height h.
  • the height of respective crests varies along their lengths and that the base of respective crests also varies along the length of the crests.
  • the crests 7 are inclined at an angle to the surface 11 from which they project and therewith are also angled to the optical axis of the light fitting, as illustrated in figure 7 .
  • this angle of inclination varies across the surface of the glass cover 4.
  • the lenses 5 are formed by depressions in the glass cover 4.
  • the reflector 3 is parabolic, as illustrated in figure 1 , so that the light leaving the reflector will be parallel when it meets the glass cover.
  • the parallel light meets the glass cover, the light will be given an angle of propagation in a direction of the inclination of the crests towards the incident light arriving from the reflector.
  • the spreading angle of the light in a direction perpendicular to the direction just mentioned is given by the wave shape of the crest.
  • the crests 7 are formed on the surface of the glass cover 4 that faces towards the light source 2.
  • the crests 7 are preferably formed in the manner described above with respect to the second embodiment of the invention and illustrated in figure 5 .
  • the benefit obtained with this particular embodiment is that the crests are kept protected against contamination while the outer surface of the glass cover is smooth and therewith readily cleaned by weather and wind.
  • the crests 7 are formed on the surface of the glass cover 4 that faces away from the light source 2.
  • the crests 7 are therewith preferably formed in the manner described above with reference to the first-embodiment of the invention and illustrated in figure 4 .
  • the first embodiment is beneficial by virtue of the fact that the angle at which the light is spread will be greater than the angle according to the second embodiment. This is because the parallel light arriving from the reflector passes through the planar inner surface of the glass cover as parallel light and is thereafter reflected towards the crests.
  • the light is reflected towards the crests by a further glass volume before the light is emitted from the planar outer surface of the glass cover 4.
  • angles V at which the light is spread in the case of the first embodiment may reach to about +/- 75° to the optical axis of the light fitting.
  • angles V at which the light is spread may reach to about +/- 81° to the optical axis of the light fitting.
  • the present invention provides illumination with extremely high efficiency, by virtue of the fact that the optical system consisting of the lenses 5 in the form of crests 7 guides the light to the surface which is actually intended to be illuminated and therewith avoid wastage in the form of uncontrolled stray light.
  • Such a light fitting or light fixture can be used for many illuminative purposes.
  • the fitting can be used to illuminate the outer facades of buildings, to illuminate signs, to illuminate camera studios and for greenhouse lighting, etc.
  • the invention is highly beneficial in avoiding "black holes" between the light fittings, by designing the fitting so that it will illuminate a rectangular surface area of a street or road. This enables the total lighting effect to be diminished without losing visibility he present invention thus avoids the aforementioned drawbacks.
  • the illustrated light fitting may have a form other than circular.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)
  • Liquid Crystal Substances (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
EP06824596A 2006-03-24 2006-11-30 A light fitting Not-in-force EP1999406B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL06824596T PL1999406T3 (pl) 2006-03-24 2006-11-30 Oprawa oświetleniowa

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0600675A SE0600675L (sv) 2006-03-24 2006-03-24 Belysningsarmatur med ett täckglas vilket innefattar parallella uppskjutande kammar
PCT/SE2006/050527 WO2007111547A1 (en) 2006-03-24 2006-11-30 A light fitting

Publications (3)

Publication Number Publication Date
EP1999406A1 EP1999406A1 (en) 2008-12-10
EP1999406A4 EP1999406A4 (en) 2010-06-30
EP1999406B1 true EP1999406B1 (en) 2011-05-04

Family

ID=37741166

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06824596A Not-in-force EP1999406B1 (en) 2006-03-24 2006-11-30 A light fitting

Country Status (6)

Country Link
EP (1) EP1999406B1 (sv)
AT (1) ATE508321T1 (sv)
DE (1) DE602006021806D1 (sv)
PL (1) PL1999406T3 (sv)
SE (1) SE0600675L (sv)
WO (1) WO2007111547A1 (sv)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE531002C2 (sv) * 2008-01-23 2008-11-18 Prismalence Ab Belysningsarmatur
WO2010010494A1 (en) * 2008-07-24 2010-01-28 Koninklijke Philips Electronics N.V. Luminaire device with several lighting units
ES2345477B1 (es) * 2009-03-17 2011-09-23 Fediel System, S.L. Dispositivo optico para lampara de luminaria con led.
CN106122896B (zh) * 2009-05-25 2019-12-20 Lg伊诺特有限公司 间隙构件、透镜以及具有间隙构件和透镜的照明装置
US8313218B2 (en) 2009-05-25 2012-11-20 Lg Innotek, Co., Ltd. Gap member, lens and lighting device having the same
CN102454938A (zh) * 2011-01-04 2012-05-16 深圳市鹏之光照明科技有限公司 一种灯具的配光系统
EP2926047B1 (en) * 2012-11-30 2017-01-11 Philips Lighting Holding B.V. Lighting unit, especially for road illumination
WO2015062863A1 (en) * 2013-10-29 2015-05-07 Koninklijke Philips N.V. Lighting unit, especially for road illumination
JP2016541104A (ja) * 2013-12-16 2016-12-28 フィリップス ライティング ホールディング ビー ヴィ 柔軟で妨害されることのないビーム成形
US20240302581A1 (en) * 2023-03-09 2024-09-12 Ii-Vi Delaware, Inc. Systems and methods for an ultra-wide field of illumination diffuser

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH664817A5 (de) * 1984-10-17 1988-03-31 Peter A Balla Beleuchtung fuer geschlossene laengliche raeume.
US4991073A (en) * 1989-03-08 1991-02-05 Gte Products Corporation Lighting lens
FR2691231B1 (fr) * 1992-05-12 1999-05-07 Valeo Vision Voyant a deviation laterale pour vehicule automobile, et feu de signalisation l'incorporant.
JP4168179B2 (ja) * 1995-03-03 2008-10-22 スリーエム カンパニー 種々の高さの構造化面を有する光指向性フィルム及び該フィルムから作製された光指向性製品
FR2731771B1 (fr) * 1995-03-13 1997-06-06 Valeo Vision Feu de signalisation, notamment pour vehicule automobile, produisant un faisceau d'une teinte donnee et presentant une autre teinte lorsqu'il est eteint, et procede de fabrication du voyant d'un tel feu
IT1289716B1 (it) * 1996-12-05 1998-10-16 Fiat Ricerche Dispositivo di illuminazione atto a generare un pattern rettangolare nella zona di lavoro, ad esempio per l'illuminazione di strisce
WO2002023258A2 (en) * 2000-09-14 2002-03-21 3M Innovative Properties Company Optical sheets suitable for spreading light

Also Published As

Publication number Publication date
ATE508321T1 (de) 2011-05-15
PL1999406T3 (pl) 2011-10-31
DE602006021806D1 (de) 2011-06-16
EP1999406A4 (en) 2010-06-30
SE528795C2 (sv) 2007-02-20
WO2007111547A1 (en) 2007-10-04
SE0600675L (sv) 2007-02-20
EP1999406A1 (en) 2008-12-10

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