EP0469031B1 - Verbesserungen an befestigungen für beleuchtungsröhren - Google Patents

Verbesserungen an befestigungen für beleuchtungsröhren 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
Other languages
English (en)
French (fr)
Other versions
EP0469031A1 (de
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
Original Assignee
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/de
Application granted granted Critical
Publication of EP0469031B1 publication Critical patent/EP0469031B1/de
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. Befestigungsmittel für Beleuchtungsröhren oder -kolben, das mit einer Lichtschutzelektrode, bestehend aus Seitenreflektoren (1), Stirnseitenreflektoren (2) und Querrippen oder -lamellen (6), die sich zwischen den Seitenreflektoren (1) erstrecken, ausgestattet ist, wobei die Rippen oder Lamellen (6) gekrümmte oder möglicherweise auch ebene Reflexionsflächen (7, 8, 9) aufweisen, dadurch gekennzeichnet, daß die Querrippen (6) paarweise angeordnet sind, wobei Einzelrippen (6) eines Paares in einer beiderseitigen spiegelsymmetrischen Form um eine Ebene (13) senkrecht zur Achse (14) der Beleuchtungsröhre ausgebildet sind und der Abstand zwischen zwei Einzelrippen (6) eines Paares geringer ist als der Abstand von einer Einzelrippe zur nächsten Einzelrippe eines benachbarten Paares, wobei die Abstände zwischen den Rippen in einer Richtung parallel mit der Röhrenachse und in irgendeinem Niveau entlang der Haupterstreckungsrichtung der Rippenquerschnitte gemessen werden.
  2. Befestigungsmittel nach Anspruch 1, dadurch gekennzeichnet, daß jede Einzelrippe (6) gleich einer im wesentlichen dünnen und flachen, aber gebogenen und verstärkt geformten Platte mit zwei Hauptseiten (7, 8/9) ausgebildet ist.
  3. Befestigungsmittel nach Anspruch 2, dadurch gekennzeichnet, daß die zwei Hauptseiten (7, 8/9) einer Einzelrippe (6) unterschiedlich gebogene Beschaffenheiten haben.
  4. Befestigungsmittel nach Anspruch 3, dadurch gekennzeichnet, daß die Hauptseite (3), die für das in Frage kommende Paar eine Außenseite ist, eine konkave und zweidimensionale Krümmung entlang ihrer vollen Erstreckung in einer Richtung senkrecht zur Beleuchtungsröhre oder - röhren (4), in diesem Querschnitt durch die Rippe (6) gesehen, aufweist, der auch eine Beleuchtungsröhrenachse (14) enthält und vertikal aufrecht liegt, wenn die Beleuchtungsröhre (4) horizontal angeordnet ist, wobei deren Außenseite gleichmäßig in Sichtrichtung für den Querschnitt ausgebildet ist.
  5. Befestigungsmittel nach Anspruch 4, dadurch gekennzeichnet, daß die Hauptseite (8/9), die für das in Frage kommende Paar eine Innenseite ist, in zwei Flächen (8 bzw. 9) geteilt ist, wobei eine Fläche (8) proximal zur Beleuchtungsröhre im wesentlichen der Krümmung der Außenseite (7) folgt und entweder konvex oder leicht versetzt davon gekrümmt oder im wesentlichen eben ausgebildet ist, und wobei eine Fläche (9) distal zur Beleuchtungsröhre eine konkave Krümmung von einer ausgeprägt geformten Flächenübergangskante (12) zu der Einzelrippenkante (11) aufweist, die sich distal zur Beleuchtungsröhre befindet.
  6. Befestigungsmittel nach Anspruch 5, dadurch gekennzeichnet, daß die Flächen (9) distal zur Beleuchtungsröhre eine Krümmung des gleichen Typs wie die Einzelrippenaußenseite (7), jedoch mit verringertem Radius oder Krümmungsradien aufweist.
  7. Befestigungsmittel nach Anspruch 6, dadurch gekennzeichnet, daß die geometrischen Abmessungen in einer solchen Weise gewählt werden, daß die trapezähnlichen Figuren, die im Querschnitt erscheinen, wenn ihre Abgrenzungslinie gebildet wird von
    a) den zwei Flächen (9) distal von der Beleuchtungsröhre und auf der Seite der Einzelrippe (6) eines Rippenpaares, der imaginären Verbindungslinie parallel zur Beleuchtungsröhre und zwischen den zwei Flächenübergangskanten (12) des Paares und der imaginären Verbindungslinie parallel zur Beleuchtungsröhre und zwischen den zwei Kanten (11) der Einzelrippen (6) distal von der Beleuchtungsröhre,
    und
    b) den zwei Rippenaußenseiten (7), die zueinander zweier benachbarter Rippenpaare zeigen, der imaginären Verbindungslinie parallel zur Beleuchtungsröhre und zwischen den korrespondierenden Rippenkanten (10) proximal zur Beleuchtungsröhre und der imaginären Verbindungslinie zwischen den korrespondierenden Rippenkanten (11) distal von der Beleuchtungsröhre
    ähnliche geometrische Figuren mit einem vorbestimmten Magnitudenverhältnis sind.
  8. Befestigungsmittel nach irgendeinem der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß die gekrümmten Reflexionsflächen (7, 9) eine parabolisch-typische Krümmung aufweisen.
EP90906378A 1989-04-07 1990-04-06 Verbesserungen an befestigungen für beleuchtungsröhren Expired - Lifetime EP0469031B1 (de)

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 (en) 1989-04-07 1990-04-06 Improvement in fixtures for luminous tubes

Publications (2)

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

Family

ID=19891912

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90906378A Expired - Lifetime EP0469031B1 (de) 1989-04-07 1990-04-06 Verbesserungen an befestigungen für beleuchtungsröhren

Country Status (7)

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

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 (de) * 1993-09-09 1999-12-08 Veko Products B.V. Querlamelle für Leuchtenkasten
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 (de) * 1999-02-25 2001-12-05 United Technologies Corporation Vibrationsangetriebener akustischer strahl, der die ablösung der grenzschicht kontrolliert

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 (de) * 1999-02-25 2001-12-05 United Technologies Corporation Vibrationsangetriebener akustischer strahl, der die ablösung der grenzschicht kontrolliert

Also Published As

Publication number Publication date
DE69012812T2 (de) 1995-02-16
FI914719A0 (fi) 1991-10-07
WO1990012245A1 (en) 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 (de) 1992-02-05

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