EP1073862B2 - Dispositif de guidage de lumiere pour source lumineuse oblongue - Google Patents

Dispositif de guidage de lumiere pour source lumineuse oblongue Download PDF

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Publication number
EP1073862B2
EP1073862B2 EP99917682A EP99917682A EP1073862B2 EP 1073862 B2 EP1073862 B2 EP 1073862B2 EP 99917682 A EP99917682 A EP 99917682A EP 99917682 A EP99917682 A EP 99917682A EP 1073862 B2 EP1073862 B2 EP 1073862B2
Authority
EP
European Patent Office
Prior art keywords
light source
grooves
light
axis
axial
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.)
Expired - Lifetime
Application number
EP99917682A
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German (de)
English (en)
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EP1073862B1 (fr
EP1073862A1 (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 Lighting GmbH Austria
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Filing date
Publication date
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Application filed by Zumtobel Lighting GmbH Austria filed Critical Zumtobel Lighting GmbH Austria
Priority to EP99917682A priority Critical patent/EP1073862B2/fr
Publication of EP1073862A1 publication Critical patent/EP1073862A1/fr
Publication of EP1073862B1 publication Critical patent/EP1073862B1/fr
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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

Definitions

  • the present invention relates to a device for guiding light for an elongate light source, in particular fluorescent tube, with a substantially tubular or tubular sector-shaped body of transparent material for substantially coaxial recording of the light source, or the like on its inside with axially parallel adjacent grooves, notches. is provided, which have flanks, which are seen in an axial normal section at an angle of 40 ° to 46 °, preferably 43 °, inclined with respect to the radial direction.
  • a device of the aforementioned type is known from EP 0372272.
  • the grooves are used for scattering or fanning of the light distribution in axialnormaler direction to reduce the luminous flux density immediately below the light source.
  • the question of a light dimming relative to the axial direction of the light source is not addressed in this document.
  • a light guide is often desired in practice in order to maintain a predetermined radiation angle, outside of which there is a substantial suppression of the light emitted by the light source.
  • refracting or reflecting devices can be used; a known type of reflective devices are mirror grids of longitudinal and transverse reflector fins. Also combinations of refracting and reflecting devices are possible.
  • the invention has for its object to provide a refracting light guide device, which is a cost-effective alternative to mirror grid lights.
  • this structure causes a deflection of light rays near the axial direction in one of the radial directions.
  • the light emission of a fluorescent tube enveloped (at least partially) by such a device is hidden in an angular cone about the axial, i. the beam angle normal to the fluorescent tube axis (e.g., down) is restricted.
  • the axial normal slats which are customary in mirror grid lights, since the light guiding device according to the invention takes over the light suppression in the longitudinal direction.
  • the grooves are distributed evenly over the inner circumference of the body, and more preferably at least 20 grooves are provided. As a result, the light distribution over the emission area is made uniform.
  • the radius of the flanks is 0.5 to 2.0 times the distance between half the depth of the grooves and the axis of the body.
  • the distance between half the depth of the grooves and axis of the body is 1.4 to 1.7 times the radius of the male light source, which allows a particularly compact design.
  • the refractive index of the transparent material is at least 1.45, which provides a greater shading angle, i. allows a lower beam angle.
  • Another aspect of the invention is to provide a lamp with an elongated light source, in particular fluorescent tube, which is overlapped by a roof-like reflector and is equipped with a light guiding device according to the invention with a tubular body which surrounds the light source. If a light guide device with a tubular sector-shaped body is used, this surrounds the light source on its side facing away from the reflector.
  • the light source 1 and the body 3 roof-spanning or encompassing a trough, inverted-U or teilparabelförmiger reflector 4 of conventional design is arranged.
  • the length of the lamp shown in section in Fig. 1 in the direction of the axis 2 can be chosen arbitrarily.
  • any known form of "elongate 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 need not necessarily be straight, but may also be slightly curved or polygonzugförmig, in which cases the body 3 is adapted to the course of the light source 1 accordingly.
  • the body 3 is on its inside with the axis 2 parallel to each other, adjacent grooves 5, notches or the like. 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, viewed in an axially normal section.
  • the radius R 1 of the flanks 6, 7 is approximately 0.5 to 2.0 times the distance R 2 between half the depth of Ridges 5 and the common axis 2 of light source 1 and body 3.
  • the mean angle ( ⁇ 1 + ⁇ 2 ) / 2 of the flanks 6, 7 to the radial 8 is in the range of 40 ° - 46 °, preferably at about 43 °.
  • the distance R 2 between about half the depth of the grooves 5 and the common axis 2 of the light source 1 and body 3 is about 1.4 to 1.7 times the radius R L of the light source 1.
  • the outer radius R 3 of the body 3 is chosen as low as possible, ie so that just a sufficient strength for the body 3 is given.
  • the bottoms 9 of the grooves 5 therefore extend to close to the outer periphery of the body. 3
  • the number of grooves 5 can be chosen arbitrarily large and is limited in practice by manufacturing limitations.
  • the operation of the device is as follows.
  • the light rays emanating from the light source 2 are deflected by the prism-like structure of the body 3 formed by the grooves 5, not only in the axially normal plane (as shown in FIG. 1), but also in each axially parallel plane from which an exemplary one shown in FIG. 2 is shown.
  • the body 3 shines in each direction perpendicular to the axis wider than the light source.
  • FIGS. 4 and 5 show a spatial representation of the combination of the sketched in FIGS. 1 and 2 refraction effects. All light rays emanating from a point 10 on the light source 2 at a cone sheath angle 11 with respect to the axis 2 (FIG. 4) are emitted when the body 3 (FIG. 5) is interposed in the form of a "compressed" cone sheath 12 around the axis 2 a Abschattungskegel 13 is formed.
  • the shading cone 13 produces a restriction of the emission angle of the light shown in Fig. 1 normal to the plane of the drawing in Fig. 1, as he otherwise could only be achieved by axially normal transverse fins within the reflector 4, down.
  • the shading in the axial direction has an advantageous effect, since the deflected from the shading light rays increase the radiation intensity of the light sources / body assembly on the reflector 4, so that it is better utilized.
  • a particular advantage arises in conjunction with reflectors, which do not change the angle of rays to the axis, the apex angle of the Abschattungskegels the entire lamp is therefore not smaller than that of the light guide.
  • axial normal plane reflectors which serve as a two-sided conclusion of the reflector 4, or axially parallel trough-shaped reflectors, in which each point of the reflector has an axially parallel tangent plane at which the angle of each beam is only mirrored to the axis, but does not change in magnitude. 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 supplies the light source 2 e.g. on its side facing away from the reflector 4 partial ring surrounds, for example, to 1/4, half or 3/4.
  • both the reflector and the body may have coincident vacancies, 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 at the top have a longitudinal slot through which the ceiling is directly illuminated from below, thereby creating a partial indirect lighting of the room.
  • the body 3 can be extruded from a transparent plastic.
  • the body 3 can be made of a correspondingly profiled foil, which is bent around the light source 2 partly or completely around it. It is also possible to use a plurality of coaxial bodies 3 enclosing or surrounding each other (adjacent or with play), so that a cascading their effects, ie an enlargement of the shading angle 13 results.
  • the light source 1 may also have other than circular cross-section and need not be arranged coaxially with the body 3.
  • tubular body 3 is meant not only a cylindrical tubular body, but a generally tubular body, e.g. with elliptical profile, rounded-cornered profile etc.
  • the body 3 may be opposed to the light source 1, as shown, i. the apexes 14 formed between the flanks 6, 7 of adjacent grooves 5 rest on the outer surface of the light source 1.
  • the body 3 may be made integral with the outer wall of the light source 1, for example, as a shell of a fluorescent tube.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Planar Illumination Modules (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Eye Examination Apparatus (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Endoscopes (AREA)

Claims (8)

  1. Dispositif de guidage de lumière pur une source lumineuse (1) oblongue, en particulier des tubes fluorescents, comprenant un corps (3) essentiellement en forme de tube ou de secteur de tube en matière transparente pour le logement essentiellement coaxial de la source lumineuse (1), qui est pourvu sur son côté intérieur de rainures (5), encoches ou similaires, contiguës, axialement parallèles, qui ont des flancs (6, 7) inclinés - vus dans une coupe axialement normale - à un angle (Φ1, Φ2) de 40° à 46°, de préférence de 43°, par rapport au sens radial (8), caractérisé en ce que les rainures (5) présentent des flancs concaves vus dans une coupe axialement normale.
  2. Dispositif selon la revendication 1, caractérisé en ce que les rainures (5) sont réparties uniformément sur le pourtour intérieur du corps (3).
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce qu'il est prévu au moins 20 rainures (5).
  4. Dispositif selon la revendication 1, 2 ou 3, caractérisé en ce que le rayon (R1) des flancs (6, 7) représente 0,5 à 2 fois la distance (R2) entre la moitié de la profondeur des rainures (5) et l'axe (2) du corps (3).
  5. Dispositif selon une des revendications 1 à 4, caractérisé en ce que l'indice de réfraction de la matière transparente est au moins de 1,45.
  6. Lumière comprenant une source lumineuse (1) oblongue, en particulier des tubes fluorescents, qui est recouverte par un réflecteur (4) en forme de toit, caractérisée par un dispositif selon une des revendications 1 à 5 comprenant un corps (3) essentiellement en forme de tube qui entoure la source lumineuse (1).
  7. Lumière comprenant une source lumineuse (1) oblongue, en particulier des tubes fluorescents, qui est recouverte par un réflecteur (4) en forme de toit, caractérisée par un dispositif selon une des revendications 1 à 5 comprenant un corps (3) essentiellement en forme de secteur de tube qui entoure la source lumineuse (1) sur son côté opposé au réflecteur (4).
  8. Lumière selon une des revendications 6 ou 7, comprenant une source lumineuse cylindrique, caractérisée en ce que la distance (R2) entre la moitié de la profondeur des rainures (5) et l'axe (2) du corps (3) représente 1,4 à 1,7 fois le rayon (RL) de la source lumineuse (1) à accueillir.
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 1998-02-17
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 EP1073862A1 (fr) 2001-02-07
EP1073862B1 EP1073862B1 (fr) 2003-03-19
EP1073862B2 true 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
AU4393101A (en) * 2000-03-20 2001-10-03 Bartenbach, Christian Device for guiding light for an elongated light source
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
US9869432B2 (en) 2013-01-30 2018-01-16 Cree, Inc. Luminaires using waveguide bodies and optical elements
US9519095B2 (en) 2013-01-30 2016-12-13 Cree, Inc. Optical waveguides
US9690029B2 (en) * 2013-01-30 2017-06-27 Cree, Inc. Optical waveguides and luminaires incorporating same
US9291320B2 (en) 2013-01-30 2016-03-22 Cree, Inc. Consolidated troffer
US9442243B2 (en) 2013-01-30 2016-09-13 Cree, Inc. Waveguide bodies including redirection features and methods of producing same
US9625638B2 (en) 2013-03-15 2017-04-18 Cree, Inc. Optical waveguide body
US9366396B2 (en) 2013-01-30 2016-06-14 Cree, Inc. Optical waveguide and lamp including same
US10436970B2 (en) 2013-03-15 2019-10-08 Ideal Industries Lighting Llc Shaped optical waveguide bodies
US9366799B2 (en) 2013-03-15 2016-06-14 Cree, Inc. Optical waveguide bodies and luminaires utilizing same
US9645303B2 (en) 2013-03-15 2017-05-09 Cree, Inc. Luminaires utilizing edge coupling
US10502899B2 (en) * 2013-03-15 2019-12-10 Ideal Industries Lighting Llc Outdoor and/or enclosed structure LED luminaire
US9920901B2 (en) 2013-03-15 2018-03-20 Cree, Inc. LED lensing arrangement
US9798072B2 (en) 2013-03-15 2017-10-24 Cree, Inc. Optical element and method of forming an optical element
US10209429B2 (en) 2013-03-15 2019-02-19 Cree, Inc. Luminaire with selectable luminous intensity pattern
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
US10400984B2 (en) 2013-03-15 2019-09-03 Cree, Inc. LED light fixture and unitary optic member therefor
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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Publication number Priority date Publication date Assignee Title
CH156501A (fr) † 1930-08-25 1932-08-15 Works Corning Glass Lentille à dispersion pour projecteurs.
DE875938C (de) † 1951-09-29 1953-05-07 Fritz Schnebel Vorrichtung zum Abblenden von Lichtquellen
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
DE7808786U1 (de) † 1977-03-29 1978-07-13 Zumtobel Ag, Dornbirn (Oesterreich) Abdeckung aus lichtdurchlaessigem material fuer leuchtstofflampen
DE3729554C2 (de) † 1984-10-17 2000-08-31 Peter Alexander Balla Lichtverteilende Abdeckung aus lichtdurchlässigem Werkstoff für eine Leuchte

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CH389538A (de) * 1961-08-29 1965-03-31 Belmag Beleuchtungs & Metallin Beleuchtungskörper mit Abschlussglas
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
US5183323A (en) * 1982-09-29 1993-02-02 Maurice Daniel Flat panel illumination system
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
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Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH156501A (fr) † 1930-08-25 1932-08-15 Works Corning Glass Lentille à dispersion pour projecteurs.
DE875938C (de) † 1951-09-29 1953-05-07 Fritz Schnebel Vorrichtung zum Abblenden von Lichtquellen
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
DE7808786U1 (de) † 1977-03-29 1978-07-13 Zumtobel Ag, Dornbirn (Oesterreich) Abdeckung aus lichtdurchlaessigem material fuer leuchtstofflampen
DE3729554C2 (de) † 1984-10-17 2000-08-31 Peter Alexander Balla Lichtverteilende Abdeckung aus lichtdurchlässigem Werkstoff für eine Leuchte

Also Published As

Publication number Publication date
US6400086B1 (en) 2002-06-04
DK1073862T4 (da) 2007-07-16
AU3588699A (en) 1999-11-16
ES2195562T5 (es) 2007-11-01
DK1073862T3 (da) 2003-06-23
EP0953800A1 (fr) 1999-11-03
EP1073862B1 (fr) 2003-03-19
NZ507603A (en) 2002-05-31
EP1073862A1 (fr) 2001-02-07
AU755027B2 (en) 2002-11-28
ES2195562T3 (es) 2003-12-01
WO1999056058A1 (fr) 1999-11-04
ATE235019T1 (de) 2003-04-15

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