EP1073862A1 - Dispositif de guidage de lumiere pour source lumineuse oblongue - Google Patents

Dispositif de guidage de lumiere pour source lumineuse oblongue

Info

Publication number
EP1073862A1
EP1073862A1 EP99917682A EP99917682A EP1073862A1 EP 1073862 A1 EP1073862 A1 EP 1073862A1 EP 99917682 A EP99917682 A EP 99917682A EP 99917682 A EP99917682 A EP 99917682A EP 1073862 A1 EP1073862 A1 EP 1073862A1
Authority
EP
European Patent Office
Prior art keywords
light source
grooves
light
reflector
axis
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
EP99917682A
Other languages
German (de)
English (en)
Other versions
EP1073862B2 (fr
EP1073862B1 (fr
Inventor
Johannes Huter
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
Original Assignee
Zumtobel Staff 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=3486349&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1073862(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Zumtobel Staff GmbH filed Critical Zumtobel Staff GmbH
Priority to EP99917682A priority Critical patent/EP1073862B2/fr
Publication of EP1073862A1 publication Critical patent/EP1073862A1/fr
Application granted granted Critical
Publication of EP1073862B1 publication Critical patent/EP1073862B1/fr
Publication of EP1073862B2 publication Critical patent/EP1073862B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F21V5/02—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

Definitions

  • the present invention relates to a device for guiding light for an elongated light source, in particular a fluorescent tube.
  • elongated light sources such as fluorescent tubes
  • Refracting or reflecting devices can be used for this; a known type of reflective devices are mirror grids made of longitudinal and transverse reflector lamellae. Combinations of refracting and reflecting devices are also possible.
  • the present invention is particularly concerned with a light guiding device of the refracting type which can be used alone or in connection with reflecting elements.
  • the aim of the invention is to create a refractive light guiding device which enables a simplified construction of luminaires, in particular an inexpensive alternative to louvre mirrors.
  • this structure causes light rays near the axial direction to be deflected in a direction closer to the radial direction.
  • the light radiation from a fluorescent tube enveloped by such a device (at least partially) is blocked out in an angular cone around the axial, ie the radiation angle normal to the fluorescent tube axis (for example downward) is restricted.
  • the grooves are preferably distributed uniformly over the inner circumference of the body, and at least 20 grooves are particularly preferably provided. As a result, the light distribution over the radiation area is homogenized.
  • the radius of the flanks is preferably 0.5 to 2.0 times the distance between half the depth of the grooves and the axis of the body.
  • flanks of the grooves are inclined in an axially normal section at an angle of 40 ° to 46 °, preferably 43 °, with respect to the radial direction.
  • the distance between half the depth of the grooves and the axis of the body is preferably 1.4 to 1.7 times the radius of the light source to be recorded, which enables a particularly compact design.
  • the refractive index of the transparent material is at least 1.45, which means a larger shading angle, i.e. allows a smaller beam angle.
  • Another aspect of the invention consists in the creation of a luminaire with an elongated light source, in particular fluorescent tube, which is covered by a roof-like reflector and is equipped with a light-guiding device according to the invention with a tubular body which encloses the light source. If a light guide device with a tubular sector body is used, this surrounds the light source on its side facing away from the reflector. - 3 -
  • FIG. 1 shows a lamp according to the invention in a section normal to the longitudinal axis
  • FIG. 2 shows a portion of the light source and the light guiding device of the luminaire from FIG. 1 in a schematic side view
  • FIG. 3 shows dimensioning relationships on an exemplary sector piece of the light guiding device in a section similar to FIG. 1, and FIG.
  • FIGS. 4 and 5 are schematic radiation conditions from a point of the light source without (FIG. 4) or with (FIG. 5) light guiding device.
  • the light source 1 and the body 3 spanning or encompassing a roof is arranged in a trough, inverted U or partially parabolic reflector 4 of a conventional type.
  • the length of the lamp shown in section in FIG. 1 in the direction of the axis 2 can be chosen as desired.
  • any known form of an "elongated light source” is possible, e.g. Halogen rods, chains of individual light sources such as incandescent lamps, etc.
  • the axis 2 of the light source 1 does not necessarily have to be straight, but can also be slightly curved or polygonal, in which cases the body 3 is adapted to the course of the light source 1.
  • the body 3 is or the like on its inside with parallel to the axis 2, adjacent grooves 5, notches. Mistake. In the example shown, 12 grooves 5 are evenly distributed over the inner circumference of the body 3.
  • the grooves 5 have concave flanks 6, 7, seen in an axially normal section.
  • the radius R ⁇ of the flanks 6, 7 is approximately 0.5 to 2.0 times the distance R2 between - 4 -
  • the mean angle ( ⁇ + ⁇ 2 ) / 2 of the flanks 6, 7 to the radial 8 is in the range of 40 ° - 46 °, preferably about 43 °.
  • body 3 is approximately 1.4 to 1.7 times the radius RL of the light source 1.
  • the outer radius R3 of the body 3 is chosen to be as small as possible, i.e. so that there is just enough strength for the body 3.
  • the valley bottoms 9 of the grooves 5 therefore extend close to the outer circumference of the body 3.
  • the number of grooves 5 can be chosen to be of any size and is limited in practice by manufacturing restrictions.
  • the flanks 6, 7 of the grooves 5 can of course also be flat.
  • the operation of the device is as follows.
  • the light rays emerging from the light source 2 are formed by the prism-like structure of the grooves 5
  • Body 3 not only deflected in the axially normal plane (as shown in Fig. 1), but also in each axially parallel
  • FIG. 2 Level, an exemplary of which is shown in FIG. 2. As can be seen from this figure, axis 2 is under one
  • Body 3 deflected closer to the radial 8, etc. at an angle 5R> ⁇ ⁇ .
  • the body 3 shines wider in every direction perpendicular to the axis than the light source 1.
  • FIGS. 4 and 5 show a spatial representation of the combination of the refraction effects outlined in FIGS. 1 and 2. All light rays emanating from a point 10 on the light source 2 at a cone shell angle 11 with respect to the axis
  • FIG. 4 goes out (Fig. 4), with the interposition of the body 3 (Fig. 5) in the form of a "compressed" cone shell 12, whereby a shading cone 13 is formed about the axis 2.
  • the shading cone 13 creates a restriction of the radiation angle of the lamp shown in FIG. 1 normal to the plane of the drawing in FIG. 1, as could otherwise only be achieved by means of axially normal transverse slats within the reflector 4, - 5 -
  • the shading has an advantageous effect in the axial direction, since the light rays deflected from the shading area increase the radiation intensity of the light source / body arrangement on the reflector 4, so that it is better utilized.
  • a particular advantage arises in connection with reflectors, which do not change the angle of rays to the axis, so the apex angle of the shading cone of the entire luminaire is not less than that of the light guide.
  • axially normal planar reflectors which serve as bilateral termination of the reflector 4, or also axially parallel channel-shaped reflectors, in which each point of the reflector has an axially parallel tangential plane, at which the angle of each beam to the axis is only mirrored, but the amount does not change. With such reflectors, the longitudinal suppression of the light guide is not reduced.
  • the body 3 does not have to enclose the light source 2 on all sides; for example, a tubular sector-shaped body which the light source 2 e.g. surrounds on its side facing away from the reflector 4 in a partially annular manner, for example 1/4, half or 3/4.
  • both the reflector and the body can have coinciding open locations, axially parallel slots or open sectors, etc., which allow unobstructed passage of certain light rays from the light source.
  • This variant is useful, for example, for suspended ceiling lights, in which the body and the reflector have a longitudinal slot on the top, through which the ceiling is illuminated directly from below, thereby creating partial indirect lighting of the room.
  • the body 3 can be extruded from a transparent plastic. Alternatively, the body 3 can be made from a - 6 -
  • the light source 1 may also have other than circular cross-section and must be arranged not coaxially to the body 3 ⁇ .
  • tubular body 3 is understood not only as a cylindrical tubular body, but rather as a generally tubular body, for example with an elliptical profile, a rounded-angular profile, etc.
  • the body 3 can rest against the light source 1 in a different way than shown, ie the vertices 14 formed between the flanks 6, 7 of adjacent grooves 5 lie against the outer surface of the light source 1.
  • the body 3 can be made in one piece with the outer wall of the light source 1, for example as a sleeve for a fluorescent tube.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Planar Illumination Modules (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Eye Examination Apparatus (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Endoscopes (AREA)
EP99917682A 1998-04-29 1999-04-29 Dispositif de guidage de lumiere pour source lumineuse oblongue Expired - Lifetime EP1073862B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP99917682A EP1073862B2 (fr) 1998-04-29 1999-04-29 Dispositif de guidage de lumiere pour source lumineuse oblongue

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
AT28098 1998-04-29
AT28098 1998-04-29
EP98890139 1998-05-12
EP98890139A EP0953800A1 (fr) 1998-04-29 1998-05-12 Dispositif de contrÔle de la lumière émise par une lampe allongée
EP99917682A EP1073862B2 (fr) 1998-04-29 1999-04-29 Dispositif de guidage de lumiere pour source lumineuse oblongue
PCT/AT1999/000107 WO1999056058A1 (fr) 1998-04-29 1999-04-29 Dispositif de guidage de lumiere pour source lumineuse oblongue

Publications (3)

Publication Number Publication Date
EP1073862A1 true EP1073862A1 (fr) 2001-02-07
EP1073862B1 EP1073862B1 (fr) 2003-03-19
EP1073862B2 EP1073862B2 (fr) 2007-03-14

Family

ID=3486349

Family Applications (2)

Application Number Title Priority Date Filing Date
EP98890139A Withdrawn EP0953800A1 (fr) 1998-04-29 1998-05-12 Dispositif de contrÔle de la lumière émise par une lampe allongée
EP99917682A Expired - Lifetime EP1073862B2 (fr) 1998-04-29 1999-04-29 Dispositif de guidage de lumiere pour source lumineuse oblongue

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP98890139A Withdrawn EP0953800A1 (fr) 1998-04-29 1998-05-12 Dispositif de contrÔle de la lumière émise par une lampe allongée

Country Status (8)

Country Link
US (1) US6400086B1 (fr)
EP (2) EP0953800A1 (fr)
AT (1) ATE235019T1 (fr)
AU (1) AU755027B2 (fr)
DK (1) DK1073862T4 (fr)
ES (1) ES2195562T5 (fr)
NZ (1) NZ507603A (fr)
WO (1) WO1999056058A1 (fr)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001071246A1 (fr) * 2000-03-20 2001-09-27 Bartenbach, Christian Dispositif de guidage de lumiere d'une source lumineuse oblongue
US7658514B2 (en) * 2006-04-13 2010-02-09 Lg Electronics Inc. Light guide, method and apparatus for manufacturing the same, and illuminating system having the same
US9690029B2 (en) * 2013-01-30 2017-06-27 Cree, Inc. Optical waveguides and luminaires incorporating same
US9366396B2 (en) 2013-01-30 2016-06-14 Cree, Inc. Optical waveguide and lamp including same
US9869432B2 (en) 2013-01-30 2018-01-16 Cree, Inc. Luminaires using waveguide bodies and optical elements
US9291320B2 (en) 2013-01-30 2016-03-22 Cree, Inc. Consolidated troffer
US9625638B2 (en) 2013-03-15 2017-04-18 Cree, Inc. Optical waveguide body
US9442243B2 (en) 2013-01-30 2016-09-13 Cree, Inc. Waveguide bodies including redirection features and methods of producing same
US10436969B2 (en) 2013-01-30 2019-10-08 Ideal Industries Lighting Llc Optical waveguide and luminaire incorporating same
US10400984B2 (en) 2013-03-15 2019-09-03 Cree, Inc. LED light fixture and unitary optic member therefor
US10209429B2 (en) 2013-03-15 2019-02-19 Cree, Inc. Luminaire with selectable luminous intensity pattern
US10502899B2 (en) * 2013-03-15 2019-12-10 Ideal Industries Lighting Llc Outdoor and/or enclosed structure LED luminaire
US9798072B2 (en) 2013-03-15 2017-10-24 Cree, Inc. Optical element and method of forming an optical element
US9645303B2 (en) 2013-03-15 2017-05-09 Cree, Inc. Luminaires utilizing edge coupling
US10436970B2 (en) 2013-03-15 2019-10-08 Ideal Industries Lighting Llc Shaped optical waveguide bodies
US10379278B2 (en) * 2013-03-15 2019-08-13 Ideal Industries Lighting Llc Outdoor and/or enclosed structure LED luminaire outdoor and/or enclosed structure LED luminaire having outward illumination
US9920901B2 (en) 2013-03-15 2018-03-20 Cree, Inc. LED lensing arrangement
US9366799B2 (en) 2013-03-15 2016-06-14 Cree, Inc. Optical waveguide bodies and luminaires utilizing same
US10416377B2 (en) 2016-05-06 2019-09-17 Cree, Inc. Luminaire with controllable light emission
US11719882B2 (en) 2016-05-06 2023-08-08 Ideal Industries Lighting Llc Waveguide-based light sources with dynamic beam shaping
US10739513B2 (en) 2018-08-31 2020-08-11 RAB Lighting Inc. Apparatuses and methods for efficiently directing light toward and away from a mounting surface
US10801679B2 (en) 2018-10-08 2020-10-13 RAB Lighting Inc. Apparatuses and methods for assembling luminaires

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CH156501A (fr) † 1930-08-25 1932-08-15 Works Corning Glass Lentille à dispersion pour projecteurs.
CH289538A (de) * 1949-10-22 1953-03-15 Rheinpreussen Ag Verfahren zur Herstellung des Diäthylaminoäthylesters der 4-Amino-2-oxy-benzoesäure.
DE875938C (de) † 1951-09-29 1953-05-07 Fritz Schnebel Vorrichtung zum Abblenden von Lichtquellen
CH389538A (de) * 1961-08-29 1965-03-31 Belmag Beleuchtungs & Metallin Beleuchtungskörper mit Abschlussglas
GB953813A (en) † 1962-03-15 1964-04-02 Gen Electric Co Ltd Improvements relating to lighting fittings and to refractors for use in such fittings
GB1372024A (en) * 1970-10-07 1974-10-30 Oram J A Lighting device
US4188657A (en) * 1973-07-13 1980-02-12 Whiteway Manufacturing Co., Inc. Reflector and method of producing different, distinctive and predictable light patterns therefrom
DE7808786U1 (de) † 1977-03-29 1978-07-13 Zumtobel Ag, Dornbirn (Oesterreich) Abdeckung aus lichtdurchlaessigem material fuer leuchtstofflampen
US5183323A (en) * 1982-09-29 1993-02-02 Maurice Daniel Flat panel illumination system
CH664817A5 (de) † 1984-10-17 1988-03-31 Peter A Balla Beleuchtung fuer geschlossene laengliche raeume.
FR2668838B1 (fr) * 1990-11-07 1993-02-05 Faure Pierre Dispositif a enceinte transparente munie d'une zone interne invisible de l'exterieur de l'enceinte.
DE4115836C2 (de) * 1991-05-15 1999-11-25 Jordan Reflektoren Gmbh & Co Leuchte mit einer Reflektoranordnung und einem Abblendkörper
US5199787A (en) * 1992-01-08 1993-04-06 North American Philips Corporation Reflector lamp having improved lens

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Also Published As

Publication number Publication date
WO1999056058A1 (fr) 1999-11-04
ES2195562T3 (es) 2003-12-01
ATE235019T1 (de) 2003-04-15
EP0953800A1 (fr) 1999-11-03
DK1073862T3 (da) 2003-06-23
NZ507603A (en) 2002-05-31
DK1073862T4 (da) 2007-07-16
EP1073862B2 (fr) 2007-03-14
ES2195562T5 (es) 2007-11-01
US6400086B1 (en) 2002-06-04
AU755027B2 (en) 2002-11-28
AU3588699A (en) 1999-11-16
EP1073862B1 (fr) 2003-03-19

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