EP0469031B1 - Amelioration relative a des armatures d'eclairage pour des tubes fluorescents - Google Patents

Amelioration relative a des armatures d'eclairage pour des tubes fluorescents Download PDF

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Publication number
EP0469031B1
EP0469031B1 EP90906378A EP90906378A EP0469031B1 EP 0469031 B1 EP0469031 B1 EP 0469031B1 EP 90906378 A EP90906378 A EP 90906378A EP 90906378 A EP90906378 A EP 90906378A EP 0469031 B1 EP0469031 B1 EP 0469031B1
Authority
EP
European Patent Office
Prior art keywords
fins
luminous tube
pair
fin
curvature
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
EP90906378A
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German (de)
English (en)
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EP0469031A1 (fr
Inventor
Per Kamsvaag
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.)
IFA ELECTRIC AS
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IFA ELECTRIC AS
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Filing date
Publication date
Application filed by IFA ELECTRIC AS filed Critical IFA ELECTRIC AS
Publication of EP0469031A1 publication Critical patent/EP0469031A1/fr
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Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • F21V11/02—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using parallel laminae or strips, e.g. of Venetian-blind type

Definitions

  • the present invention relates to an improvement in fixtures for luminous tubes or bulbs, and more specifically an improved version of the transverse lamellas or fins in the light shielding grid of the fixture.
  • ceiling-mounted illumination with luminous bulbs could be provided with an opportune and comfortable design or mode of operation by fitting the fixture with a light shielding grid which provides a downward directing of the light by shielding and reflections.
  • a light shielding grid which provides a downward directing of the light by shielding and reflections.
  • such grid devices will, in addition to side and end reflectors intended for reflecting light mainly downward, be equipped with simple crossbar-like transverse fins in the form of vertically upright plates just below the luminous bulb or bulbs, mounted in a suitable number between the side reflectors, and with number, height and interval distance adapted for maximum allowable light scatter angle, maximum desirable construction height of the fixture etc.
  • European patent application no. 138.747 discloses an example of such V-shaped transverse fins.
  • the fins shown in said European application are designed with a three-dimensional curvature in the reflecting surfaces in order to improve the shielding conditions regarding obliquely reflected light rays.
  • Curved and reflecting fins are also known from German Gebrauchsmuster DE-U-1984108, however, the grid is in this case a two-dimensional grid consisting of both transverse and longitudinal fins for dividing the light output into small "cells". Particularly in the embodiment regarding curved fins, the effect in said Gebrauchsmuster is explicitly stated to be that of creating light "funnels" in a downward direction.
  • the present invention is, however, directed to providing a one-dimensional grid fixture allowing a much larger part of the light to escape down into the room.
  • FIG. 2 corresponds approximately to the above mentioned cross-sectional shape.
  • Fig. 3 shows a closed top part of the V-fin, for achieving a reflection back again of the light, which then entails a higher light yield from the fixture due to inter-reflections which pass the upward reflected light from the fins, down again.
  • the structure shown in fig. 4 provides a good increase of the light yield, but this implies the disadvantage of increasing the fixture construction height with a height difference of H2-H.
  • the purpose of the present invention is to provide a fixture with transverse lamellas or fins which results in a corresponding increase in the light yield as the last mentioned variant, however without increasing the construction height in comparison with the variants of fig. 2 and 3. Said purpose is fulfilled by providing a luminous bulb fixture as defined in the patent claims.
  • Fig. 1 shows a ceiling mounted fixture with one single luminous tube 4.
  • the fixture is equipped with side reflectors 1, end reflectors 2 and quite simple plate-shaped transverse fins 3 for shielding and downward directing of the light from the luminous tube or bulb.
  • the height of each fin or lamella 3, as well as the distance between fins determine the maximum angle with the vertical direction for escaping light rays in the case of a direct reflection, however multiple reflections imply a much wider scatter angle and poorer control of the darkening conditions.
  • reference numeral 5 refers to more advanced designs of fins or lamellas, where the result is a poorer light yield than in the first case, however in return, better control of the shielding angle is achieved, and consequently more correct and comfortable illumination conditions.
  • the solution in fig. 4 gives the better light yield, but the problem in this case is the increased construction height, which is usually not desirable.
  • fig. 5 is shown a lamella example in accordance with the present invention.
  • the same external geometry as in the V-shapes in figs. 2, 3 and 4 has been retained, i.e. preferably a parabolic curvature type for the the outer surfaces 7.
  • the previous "V"-lamella has now been spilt into two single fins 6 in a mirror symmetrical relation, in such a manner that light can pass also "inside” or "through” the pair of fins 6-6.
  • surfaces 8 and 9 are of a reflecting type in the same manner as the outer surfaces 7.
  • the upper and lower edges are shown respectively with reference numerals 10 and 11. 12 indicates an edge line (into the paper plane) separating the two inner surfaces 8 and 9.
  • An imaginary symmetry plane in the center is indicated by reference numeral 13, and is positioned perpendicularly to the luminous tube or bulb.
  • Reference numeral 14 indicates the axis of the luminous bulb.
  • the inner surfaces 8 are either flat or shaped with a slightly convex curvature type.
  • the lower inner surfaces 9 have the same curvature type as the outer surfaces 7, however in a re-scaled, i.e. reduced version, so that the radius of curvature varies in the same manner, but is scaled down with a fixed factor.
  • the upper inner surface 8 follows to a larger or smaller extent the curve of the lamella outside 7, however deviates slowly in a downward direction, either by a somewhat different curvature, or by being a flat surface, so that the "inversely curved" lower inner surface 9 starts from an edge 12 and curves back to the lower end edge 11.
  • the distance between the single fins 6 in a fin pair is adjusted in such a manner that the same maximum exit angle is achieved also for light passing through said pair, as for light passing either directly or via reflections between the pairs. This is achieved by a proper choice of dimensions, as will be dealt with in more detail below.
  • Fig. 6 shows examples of oblique ray passage through a grid of transverse lamellas 6 in accordance with the present invention.
  • a maximum light exit angle ⁇ with the vertical direction is desirable, and the construction height implies a maximum lamella height H
  • the preferred solution ensures, with regard to the lower reflection surfaces 9, that the same maximum exit angle ⁇ is obtained, and at the same time the total light yield is increased substantially in relation to the previously known solutions.
  • the distance A is adjusted in the preferred embodiment with similar surfaces 9 as the surfaces 7, in such a manner that the ratio A′/h, h being the height from the lower edge 11 to the edge 12, and A′ being the horizontal distance between lower edge 11 and inside edge 12 for two respective lamellas in a pair, equals tan ⁇ .

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Glass Compositions (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Laser Surgery Devices (AREA)
  • Eye Examination Apparatus (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)

Claims (8)

  1. Moyen d'armature pour des tubes fluorescents ou des ampoules, ladite armature étant équipée d'une grille de protection légère constituée de réflecteurs latéraux (1), de réflecteurs d'extrémité (2) et d'ailettes transversales ou lamelles (6) se prolongeant entre lesdits réflecteurs latéraux (1), lesdites ailettes ou lamelles (6) ayant des surfaces réfléchissantes incurvées et pouvant être également plates (7, 8. 9).
       caractérisé en ce que lesdites ailettes transversales (6) sont agencées deux par deux, en paires, où les ailettes individuelles (6), dans une paire, sont fabriquées d'une façon symétrique, inversées réciproquement par rapport à un plan (13) perpendiculaire à l'axe (14) du tube fluorescent, et la distance entre deux ailettes individuelles (6), dans une paire, est plus faible que la distance d'une ailette individuelle à l'ailette individuelle la plus proche dans une paire adjacente, les distances entre les ailettes étant mesurées suivant une direction parallèle à l'axe du tube et à n'importe quel niveau le long de la direction de la longueur principale des sections transversales des ailettes.
  2. Moyen d'armature selon la revendication 1, caractérisé en ce que chaque ailette individuelle (6) est formée comme une plaque sensiblement fine et plate, cependant incurvée et structurée en ce qui concerne l'épaisseur, avec deux côtés principaux (7, 8/9)
  3. Moyen d'armature selon la revendication 2, caractérisé en ce que les deux côtés principaux (7, 8/9) d'une ailette individuelle (6) ont différentes natures de courbure.
  4. Moyen d'armature selon la revendication 3, caractérisé en ce que ce côté principal (7), qui pour la paire en question est un côté extérieur, a une courbure concave et bidimensionnelle d'une extrémité à l'autre de sa longueur complète dans une direction perpendiculaire au tube fluorescent ou aux tubes fluorescents (4), comme on le voit dans cette coupe transversale à travers ladite ailette (6) qui contient également un axe de tube fluorescent (14) et est dressée verticalement quand le tube fluorescent (4) est placé horizontalement, lequel côté extérieur est formé uniformément dans le sens de la vue pour ladite coupe transversale.
  5. Moyen d'armature selon la revendication 4, caractérisé en ce que ce côté principal (8/9), qui pour la paire en question est un côté intérieur, est divisé en deux surfaces (8, 9), où une surface (8), la plus proche du tube fluorescent, suit sensiblement la courbure du côté extérieur (7) et est, ou incurvée de façon convexe et déviant légèrement de celui-ci, ou pratiquement plate, et ou une surface (9) la plus éloignée du tube fluorescent a une courbure concave depuis un bord de transition (12) marqué de façon aiguë, vers le bord d'ailette individuelle (11) qui est le plus éloigné dudit tube fluorescent.
  6. Moyen d'armature selon la revendication 5, caractérisé en ce que ladite surface (9), la plus éloignée du tube fluorescent a une courbure du mème type que le côté extérieur (7) d'une ailette individuelle, cependant avec un rayon de courbure réduit, ou des rayons de courbure réduits.
  7. Moyen d'armature selon la revendication 6, caractérisé en ce que les dimensions géométriques sont choisies de telle manière que les figures en forme de trapèze apparaissant à ladite coupe transversale quand leur ligne de délimitation est constituée par
    a) Les deux surfaces (9) les plus éloignées du tube fluorescent et, sur les intérieurs des ailettes individuelles (6) d'une paire d'ailettes, la ligne de raccordement imaginaire parallèle au tube fluorescent et entre les deux bords de transition de surfaces (12) dans la paire, et la ligne de raccordement imaginaire parallèle au tube fluorescent et entre les deux bords (11) des ailettes individuelles (6) les plus éloignées du tube fluorescent,
    et
    (b) les deux côtés extérieurs (7) des ailettes se faisant face l'une à l'autre pour deux paires adjacentes d'ailettes, la ligne de raccordement imaginaire parallèle au tube fluorescent et entre les bords d'ailettes correspondants (10) les plus proches du tube fluorescent, et la ligne de raccordement imaginaire entre les bords d'ailettes correspondants (11) les plus éloignés du tube fluorescent,
    sont des figures géométriques similaires avec un rapport de dimensions prédéterminé.
  8. Moyen d'armature selon l'une quelconque des revendications précédentes caractérisé en ce que les surfaces réfléchissantes incurvées (7, 9) ont un type de courbure parabolique.
EP90906378A 1989-04-07 1990-04-06 Amelioration relative a des armatures d'eclairage pour des tubes fluorescents Expired - Lifetime EP0469031B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NO891443 1989-04-07
NO891443A NO167944C (no) 1989-04-07 1989-04-07 Anordning ved lysroer-armatur
PCT/NO1990/000061 WO1990012245A1 (fr) 1989-04-07 1990-04-06 Amelioration relative a des armatures d'eclairage pour des tubes fluorescents

Publications (2)

Publication Number Publication Date
EP0469031A1 EP0469031A1 (fr) 1992-02-05
EP0469031B1 true EP0469031B1 (fr) 1994-09-21

Family

ID=19891912

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90906378A Expired - Lifetime EP0469031B1 (fr) 1989-04-07 1990-04-06 Amelioration relative a des armatures d'eclairage pour des tubes fluorescents

Country Status (7)

Country Link
EP (1) EP0469031B1 (fr)
AT (1) ATE112030T1 (fr)
AU (1) AU5431290A (fr)
DE (1) DE69012812T2 (fr)
FI (1) FI914719A0 (fr)
NO (1) NO167944C (fr)
WO (1) WO1990012245A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4109492C2 (de) * 1991-03-22 2000-06-08 Parol Leuchtenkomponenten Gmbh Leuchtenraster für mit Entladungslampen ausgerüstete Rasterleuchten
DE4243659A1 (de) * 1992-12-23 1994-06-30 Licentia Gmbh Metallraster für eine Leuchte
NL9301557A (nl) * 1993-09-09 1995-04-03 Simon Cornelis Van Putten Dwarslamel voor een lichtbak.
EP0643259B1 (fr) * 1993-09-09 1999-12-08 Veko Products B.V. Lamelle transversale pour caisson lumineux
NL9302169A (nl) * 1993-12-13 1995-07-03 Simon Cornelis Van Putten Dwarslamel voor een lichtbak.
NL1005610C2 (nl) * 1997-03-24 1998-09-28 Veco Products B V Lichtbak voorzien van een dwarslamel.
US7128443B2 (en) * 2002-06-28 2006-10-31 Koninklijke Philips Electronics, N.V. Light-collimating system
DE102004039676A1 (de) * 2004-08-16 2006-02-23 Zumtobel Staff Gmbh Rasteranordnung
NL1027815C2 (nl) * 2004-12-17 2006-06-20 Lichtholland B V Lamel voor een reflector van een verlichtingsarmatuur met een buislamp.

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1159534A1 (fr) * 1999-02-25 2001-12-05 United Technologies Corporation Jet acoustique conduit par vibration et permettant le controle du decollement de la couche limite

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1984108U (de) * 1968-01-13 1968-04-25 Guenther Gubela Raster zur anordnung vor beleuchtungsquellen.
DE3412162C1 (de) * 1984-03-31 1985-08-29 Trilux-Lenze Gmbh + Co Kg, 5760 Arnsberg Langgestreckte Leuchte

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1159534A1 (fr) * 1999-02-25 2001-12-05 United Technologies Corporation Jet acoustique conduit par vibration et permettant le controle du decollement de la couche limite

Also Published As

Publication number Publication date
DE69012812T2 (de) 1995-02-16
FI914719A0 (fi) 1991-10-07
WO1990012245A1 (fr) 1990-10-18
NO167944C (no) 1991-12-27
AU5431290A (en) 1990-11-05
NO167944B (no) 1991-09-16
ATE112030T1 (de) 1994-10-15
DE69012812D1 (de) 1994-10-27
NO891443L (no) 1990-10-08
NO891443D0 (no) 1989-04-07
EP0469031A1 (fr) 1992-02-05

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