EP0372272A1 - Armature d'éclairage à grille réfléchissante - Google Patents

Armature d'éclairage à grille réfléchissante Download PDF

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Publication number
EP0372272A1
EP0372272A1 EP89121184A EP89121184A EP0372272A1 EP 0372272 A1 EP0372272 A1 EP 0372272A1 EP 89121184 A EP89121184 A EP 89121184A EP 89121184 A EP89121184 A EP 89121184A EP 0372272 A1 EP0372272 A1 EP 0372272A1
Authority
EP
European Patent Office
Prior art keywords
lamp
light
prisms
sector
light guide
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
EP89121184A
Other languages
German (de)
English (en)
Other versions
EP0372272B1 (fr
Inventor
Franz-Eugen Dipl.-Phys.-Ing. Grawe
Karl Lehrich
Richard Dr.-Ing. Schneppendahl
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.)
Trilux GmbH and Co KG
Original Assignee
Trilux Lenze GmbH and Co KG
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=6368805&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0372272(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Trilux Lenze GmbH and Co KG filed Critical Trilux Lenze GmbH and Co KG
Publication of EP0372272A1 publication Critical patent/EP0372272A1/fr
Application granted granted Critical
Publication of EP0372272B1 publication Critical patent/EP0372272B1/fr
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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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
    • 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
    • F21V13/10—Combinations of only two kinds of elements the elements being reflectors and screens
    • 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
    • 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
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes

Definitions

  • the invention relates to a mirror louvre of the type specified in the preamble of claim 1.
  • Grid mirror lights have a housing that has an elongated lamp, e.g. Fluorescent lamp, contains a mirror grid of transverse reflecting slats is arranged below the lamp.
  • the slats are intended to prevent a direct view of the lamp diagonally from below, and thus to prevent glare.
  • a mirror grid does this inadequately, especially in high rooms where the high luminance of the naked lamp and its image in the side mirror can lead to glare, since the steeply downward light is unimpeded between the grid bars falls through.
  • a person who looks into the luminaire housing from a lateral direction can be blinded by the high luminance of the image of the lamp in the reflector surface.
  • light-shielding elements have been used between the lamp and the mirror grid. These light-shielding elements are flat prismatic plates or perforated sheets or counter reflectors. Perforated shielding elements and counter reflectors have the disadvantage that a very large proportion of the luminous flux only comes out of the luminaire after multiple reflections, which have a negative effect on efficiency.
  • a prism plate which only covers the angular range of the direct light emission from the luminaire housing, does not prevent a direct view into the reflectors and thus a glare from the reflection of the lamp in the reflectors.
  • the invention has for its object to provide a mirror louvre of the type specified in the preamble of claim 1, which avoids glare by looking directly into the lamp and in its reflection in the reflectors and in which the light losses are low.
  • the lamp is surrounded by a light guide over its entire length.
  • the light guide body is pipe or gutter shaped. It preferably extends around the entire circumference of the lamp, but can also leave the upper sector free. It is important that the light guide body extends over the lower sector and the two lateral sectors and thus completely covers the light exit opening and the lateral reflectors. Since the light-guiding body has a prism structure that directs the incident radiation, at no point does a light beam fall undeflected from the lamp onto a reflector or onto a point outside the lamp housing. Use is made of the light-directing effect and the low light losses of a prism structure.
  • the light guide body enables targeted light control and thus, for example, asymmetrical light distribution when viewed in the cross-sectional plane of the luminaire housing.
  • the light guide body is expediently divided into sectors, with a lower sector covering the housing opening opposite the lamp, while two lateral sectors cover the reflectors.
  • the lateral sectors can be designed differently relative to one another. If one sector is equipped with a totally reflecting prism structure, the reflector behind it is almost completely darkened, while the light hitting this sector is directed to the opposite sector by the total reflection. At the same time, this means that the opposite sector receives all the more light. If this sector is translucent, the reflector arranged behind it emits an increased luminous flux from the luminaire housing.
  • the prism structure is preferably a profile structure made of grooves, the prisms being symmetrical or asymmetrical.
  • the side sectors also have a prism structure. Rather, these sectors can also be smooth and opal, i.e. matt or translucent.
  • the housing of the mirror louvre is preferably closed at the top by a roof or an upper reflector. However, it is also possible to leave the housing open at the top in order to produce light radiation upwards.
  • the prism structure of the upper sector is based on the lighting requirements for the upper light distribution curve. Internal or external prisms, symmetrical or asymmetrical, can be useful.
  • the mirror grid luminaire shown has an elongated luminaire housing 10 which is essentially rectangular in cross section and which, according to FIG. 1, is delimited by two side walls 11, 12 and an upper wall 13.
  • a mirror grid 15 with transversely running, mirrored slats is arranged on the underside of the lamp housing 10 .
  • the slats of the mirror grid 15 are upright strips with straight or concave curved side surfaces. The ends of these strips are attached to reflectors 16 and 17 which are arranged in the lamp housing 10 on both sides of the lamp 18.
  • the reflectors 16 and 17 are inclined or curved and guide the light of the lamp 18 from the inside of the lamp housing through the light exit opening 14 to the outside.
  • the lamp 18 is an elongated lamp which is cylindrical in the present case, for example a fluorescent lamp.
  • the lamp 18 is coaxially surrounded by the light guide body 19.
  • This light guide consists of a tube that encloses the lamp 18 along its entire length.
  • the light guide body is made of translucent material (glass or plastic).
  • its inside 20 is smooth, while the outside is formed by numerous prisms 21, which are symmetrical, ie in the manner of isosceles triangles.
  • the prisms form grooves running along the entire length of the light-guiding body 19 and raised areas therebetween, so that a profile structure is formed in which the cross-section of the light-guiding body is the same at all points along the length.
  • the apex angle a of the prisms is greater than 90 °. In the present exemplary embodiment, it is approximately 135 °.
  • the prisms 21 are arranged uniformly over the entire circumference of the one-piece light guide body 19. This means that all prisms 21 have the same apex angle a.
  • Fig. 2 shows that the direct radiation 22 radially emanating from the lamp 18 strikes the cylindrical inner surface of the light guide body 19 at right angles and is broken away from the normal to the exit surface on the prismatic outer surface.
  • the radiation 23 leaving the light guide body 19 is thus deflected at every point with respect to the incident rays 22, so that scattered light is produced outside the light guide body 19.
  • the structure of the light guide body is the same over the entire circumference, the light of the lamp is scattered as a whole by the light guide body.
  • the luminance of the lamp is thus reduced by the ratio of the surface of the lamp to the surface of the light guide body. This has the effect that the glare is reduced by the ratio of the surfaces both when looking directly through the light exit surface 14 in the direction of the lamp and when looking at the reflectors.
  • the light guide body 19, which coaxially surrounds the lamp 18, is divided into sectors 25 to 28, which have different prism structures.
  • the lower sector 25 is delimited by the two tangents 30 to the lamp 18 which pass through the edges of the light exit opening 14. This means that the lower sector 25 encloses exactly that area of the lamp 18 from which direct radiation (including the marginal rays) can fall through the opening 14 if the light guide body were not present.
  • Each of the sectors 26 and 27 is delimited by one of the tangents 30 and a further tangent 31, the two delimiting tangents 30 and 31 on the lamp 18 covering that peripheral region which is taken up by the relevant reflector 16 and 17, respectively.
  • the two tangents 31 delimit the upper sector 28 such that any light emanating from the upper region of the lamp 18 including the marginal rays, either in the direction of the reflectors 16, 17 or in the direction of the upper sector 28. This means that the tangents 31 to the lamp 18 pass through the upper boundary edges of the reflectors 16 and 17.
  • the light guide body 19 has a smooth outer surface 20a in the lower sector 25, while the prisms 21 are arranged on the inside as symmetrical prisms, that is to say point in the direction of the lamp 18.
  • the apex angle a is less than about 90 °. It can be seen that the direct radiation 22 incident radially on the light-guiding body 19 is broken up into strongly diverging beams 23. The edge rays 24 are broken into divergent rays 24 '. The deflection of the light takes place at every point of the cylindrical light-guiding body away from the normal. The smaller the apex angle a, the larger the hidden area around the normal. If you look diagonally to the lamp, diagonally from below, the lamp itself appears dark, whereas the edge areas of the lamp and cylinder are light.
  • the prism structure in the upper sector 28 is designed in the same way as in the lower sector 25.
  • the light guide body 19 has the structure shown in FIG. 5, the inside 20 being smooth, while the prisms 21 point outwards.
  • the apex angle a of the prisms is approximately 90 °.
  • the reflected rays 23 being returned to the lamp.
  • the luminance of the lamp is increased and the reflector 17 in the region of the sector 27 is shadowed.
  • the light of the marginal rays 24 is not subject to total reflection on the prisms, but the strongly deflected rays 24 'are diverging into the prism structure, which slightly increases the luminance of the light guide body.
  • the sector 26 has, for example, the prism structure shown in FIG. 2 or it is opal and smooth, so that the light from the lamp 18 is scattered onto the reflector 16. With such a luminaire construction, in which one lateral sector 26 is more transparent to light than the opposite sector 27, an asymmetrical light intensity distribution of the light emerging from the light exit opening 14 is generated.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Laminated Bodies (AREA)
  • Telescopes (AREA)
EP89121184A 1988-12-09 1989-11-16 Armature d'éclairage à grille réfléchissante Revoked EP0372272B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3841518A DE3841518A1 (de) 1988-12-09 1988-12-09 Spiegelrasterleuchte
DE3841518 1988-12-09

Publications (2)

Publication Number Publication Date
EP0372272A1 true EP0372272A1 (fr) 1990-06-13
EP0372272B1 EP0372272B1 (fr) 1994-07-06

Family

ID=6368805

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89121184A Revoked EP0372272B1 (fr) 1988-12-09 1989-11-16 Armature d'éclairage à grille réfléchissante

Country Status (3)

Country Link
EP (1) EP0372272B1 (fr)
AT (1) ATE108260T1 (fr)
DE (2) DE3841518A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2668838A1 (fr) * 1990-11-07 1992-05-07 Faure Pierre Dispositif a enceinte transparente munie d'une zone interne invisible de l'exterieur de l'enceinte.
EP0513713A2 (fr) * 1991-05-15 1992-11-19 AUGUST JORDAN GMBH & CO. Armature lumineuse à source lumineuse linéaire
WO1996014597A1 (fr) * 1994-11-02 1996-05-17 The University Of British Columbia Guide de lumiere creux pour lumiere diffuse
WO2001036867A1 (fr) 1999-11-18 2001-05-25 Lid Light Design Ecran transparent anti-eblouissement pour lampe
EP1496308A2 (fr) 2003-07-10 2005-01-12 Siteco Beleuchtungstechnik GmbH Lampe d'éclairage intérieur avec un élément réfractif

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4329914A1 (de) * 1993-09-04 1995-03-09 Willing Gmbh Dr Ing Linearer Lichtleiter
DE19610250A1 (de) * 1996-03-16 1996-12-05 Braun Uwe Peter Dipl Ing Fh Prismenlichtrohr-System
DE10354462B4 (de) * 2003-11-21 2014-02-13 Zumtobel Lighting Gmbh Leuchte mit asymmetrischer Lichtabstrahlung

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE975713C (de) * 1952-10-22 1962-07-05 Siemens Ag Strassenleuchte fuer Leuchtstofflampen mit rinnenfoermigem Gehaeuse und darin eingesetztem Spiegelreflektor
FR1588328A (fr) * 1967-10-13 1970-04-10
US3733482A (en) * 1971-07-22 1973-05-15 Sunbeam Lighting Co Fluorescent luminaire with vertically oriented u-shaped lamp
US4644454A (en) * 1984-12-28 1987-02-17 Peerless Lighting Corporation Lensed indirect luminaire having improved light distribution control
EP0222115A2 (fr) * 1985-11-12 1987-05-20 TRILUX-LENZE GmbH & Co. KG Lampe de plafond
DE8808702U1 (fr) * 1988-07-04 1988-09-01 Willing, Achim, Dr.-Ing., 8604 Schesslitz, De

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1725917U (de) * 1956-05-03 1956-07-12 Lenze K G Lichtdurchlaessige abschlusswanne fuer leuchten fuer leuchtstofflampen.
US3513982A (en) * 1967-05-01 1970-05-26 Eastman Kodak Co Filter arrangement
DE7610261U1 (de) * 1976-04-02 1976-08-05 Anton Hummel, Metallwarenfabrik, 7808 Waldkirch Illuminationsleuchte mit aufsteckbarem flansch
US4667275A (en) * 1979-06-08 1987-05-19 Peerless Lighting Corporation Luminaire for indirect lighting
DE8033215U1 (de) * 1980-12-13 1981-07-09 Kinkeldey-Leuchten Gmbh & Co Kg, 3280 Bad Pyrmont "leuchte"
DE3420414C2 (de) * 1984-06-01 1994-04-14 Willing Gmbh Dr Ing Lichtdurchlässige Leuchtenabdeckung zur Entblendung von Leuchten mit langgestreckten Lampen
DE3611274A1 (de) * 1985-04-05 1986-10-09 Manville Corp., Denver, Col. Oberflaechenbeschichtung in verbindung mit prismen zur optischen lichtsteuerung
DE8620126U1 (de) * 1986-07-26 1986-09-18 Ernst Rademacher GmbH, 40668 Meerbusch Leuchte

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE975713C (de) * 1952-10-22 1962-07-05 Siemens Ag Strassenleuchte fuer Leuchtstofflampen mit rinnenfoermigem Gehaeuse und darin eingesetztem Spiegelreflektor
FR1588328A (fr) * 1967-10-13 1970-04-10
US3733482A (en) * 1971-07-22 1973-05-15 Sunbeam Lighting Co Fluorescent luminaire with vertically oriented u-shaped lamp
US4644454A (en) * 1984-12-28 1987-02-17 Peerless Lighting Corporation Lensed indirect luminaire having improved light distribution control
EP0222115A2 (fr) * 1985-11-12 1987-05-20 TRILUX-LENZE GmbH & Co. KG Lampe de plafond
DE8808702U1 (fr) * 1988-07-04 1988-09-01 Willing, Achim, Dr.-Ing., 8604 Schesslitz, De

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2668838A1 (fr) * 1990-11-07 1992-05-07 Faure Pierre Dispositif a enceinte transparente munie d'une zone interne invisible de l'exterieur de l'enceinte.
EP0513713A2 (fr) * 1991-05-15 1992-11-19 AUGUST JORDAN GMBH & CO. Armature lumineuse à source lumineuse linéaire
EP0513713A3 (en) * 1991-05-15 1993-03-24 August Jordan Gmbh & Co. Light fixture incorporating a linear light source
WO1996014597A1 (fr) * 1994-11-02 1996-05-17 The University Of British Columbia Guide de lumiere creux pour lumiere diffuse
WO2001036867A1 (fr) 1999-11-18 2001-05-25 Lid Light Design Ecran transparent anti-eblouissement pour lampe
EP1496308A2 (fr) 2003-07-10 2005-01-12 Siteco Beleuchtungstechnik GmbH Lampe d'éclairage intérieur avec un élément réfractif
EP1496308A3 (fr) * 2003-07-10 2007-10-24 Siteco Beleuchtungstechnik GmbH Lampe d'éclairage intérieur avec un élément réfractif

Also Published As

Publication number Publication date
EP0372272B1 (fr) 1994-07-06
ATE108260T1 (de) 1994-07-15
DE58908008D1 (de) 1994-08-11
DE3841518A1 (de) 1990-06-13

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