EP0138747B1 - Parabolic strip element for elongated lamps - Google Patents

Parabolic strip element for elongated lamps Download PDF

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Publication number
EP0138747B1
EP0138747B1 EP84730107A EP84730107A EP0138747B1 EP 0138747 B1 EP0138747 B1 EP 0138747B1 EP 84730107 A EP84730107 A EP 84730107A EP 84730107 A EP84730107 A EP 84730107A EP 0138747 B1 EP0138747 B1 EP 0138747B1
Authority
EP
European Patent Office
Prior art keywords
webs
transverse webs
transverse
longitudinal
designed
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
Application number
EP84730107A
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German (de)
French (fr)
Other versions
EP0138747A1 (en
Inventor
Armin Bansbach
Dieter Dipl.-Ing. Albert
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.)
Semperlux GmbH
Original Assignee
Semperlux 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
Application filed by Semperlux GmbH filed Critical Semperlux GmbH
Priority to AT84730107T priority Critical patent/ATE32135T1/en
Publication of EP0138747A1 publication Critical patent/EP0138747A1/en
Application granted granted Critical
Publication of EP0138747B1 publication Critical patent/EP0138747B1/en
Expired 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 invention relates to a parabolic lamella element for elongated light sources according to the preamble of the main claim.
  • Such lamella elements are used in particular for shading or glare control with elongated light sources such as. B. fluorescent lamps, cold cathode lamps or the like. And are usually made of plastic or light metal with a mirrored or colored, preferably white surface. While the longitudinal and transverse glare control can be carried out constructively without major difficulties, this is not the case with the equally important diagonal glare control. So far, this problem has not been mastered.
  • the invention is therefore based on the object of providing, in addition to an optimal longitudinal and transverse glare control, also reliable diagonal glare control in the direction of view in the case of a lamella element of the type mentioned at the outset.
  • the lamp elements consist of longitudinal webs 1 and transverse webs (slats) 2.
  • the slat elements are equipped with a locking mechanism 4 made of plastic or metal and can be clipped into sheet metal or aluminum channels without tools.
  • the longitudinal webs 1 are parabolic or cylindrical in shape or wound in stages; in extreme cases, as indicated at 11, they can also run straight.
  • the transverse webs 2 are designed approximately parabolically on the outside and are concave at the upper edges 7. They are also cut out at 12 V to save material. This measure prevents disturbing reflections from a light source 3 in the interior of the lights from the upper edge of the lamella 7. This anti-glare effect can be increased by keeping the V-cutouts 12 black on the inside.
  • the lower edges of the transverse webs 2 can have a straight shape 5 or a convex shape 8 or, like the upper edges 7, also have a concave shape 6.
  • the crossbar leaf height increases sharply from the central region AB to the side regions (FIGS. 2 and 6), as does the leaf thickness b 1 to b 2 (FIGS. 3, 4, 7, 8) from the inside increases to the outside.
  • the light passage openings 10 in FIGS. 1 and 5 are convex in shape.
  • the parabolically approximately cylindrical or straight design of the longitudinal webs 1, 11 and the transverse webs (lamellae) 2 produces a predetermined cut-off angle ⁇ of the light source 3 in the longitudinal direction (FIG. 9) and in the transverse direction (FIG. 10 ⁇ and ⁇ ; FIG. 11 ⁇ and ⁇ ).
  • the light source is glare-free in FIG. 10 and FIG. 11 in the transverse direction with the angle ⁇ , the transverse reflection of the light source 3 takes place via the mirrored or white parabolically shaped (approximately cylindrical) surface 1 with the radiation angle y.
  • the light source is glare-free at transverse angles ⁇ .
  • the longitudinal glare control is achieved by the increment “S (FIG.
  • the leaf height of the lamellae (FIGS. 2 and 6) increases considerably in height due to the concave curvature of the upper edge 7 from the central region AB to the side regions CD, as does the ratio h i : h 2 in FIGS. 3 and 4 and 7 and 8 shows.
  • the lower lamella shape is straight 5 or concave 6 to improve the lighting operating efficiency.

Abstract

1. Louvre for elongated light sources, comprising longitudinal webs (1) and V-shaped transverse webs (2), the sides of said transverse webs in cross section, are designed approximately parabolic and, in longitudinal direction, have a concave upper edge (7), characterized in that the transverse webs (2), starting from their centre (A-B), increase towards the lateral longitudinal webs (1) in height and in width.

Description

Die Erfindung betrifft ein parabolisches Lamellenelement für langgestreckte Lichtquellen gemäß dem Oberbegriff des Hauptanspruchs.The invention relates to a parabolic lamella element for elongated light sources according to the preamble of the main claim.

Derartige Lamellenelemente dienen insbesondere zur Beschattung bzw. Entblendung bei langgestreckten Lichtquellen wie z. B. Leuchtstofflampen, Kaltkathodenlampen od. dgl. und sind meistens aus Kunststoff oder Leichtmetall mit verspiegelter oder farbiger, vorzugsweise weißer Oberfläche hergestellt. Während die Längs- und Querentblendung in Blickrichtung konstruktiv ohne größere Schwierigkeiten durchführbar erscheint, ist dies bei der ebenso wichtigen Diagonalentblendung nicht der Fall. Dieses Problem konnte bisher nicht beherrscht werden.Such lamella elements are used in particular for shading or glare control with elongated light sources such as. B. fluorescent lamps, cold cathode lamps or the like. And are usually made of plastic or light metal with a mirrored or colored, preferably white surface. While the longitudinal and transverse glare control can be carried out constructively without major difficulties, this is not the case with the equally important diagonal glare control. So far, this problem has not been mastered.

Der Erfindung liegt daher die Aufgabe zugrunde, bei einem Lamellenelement der eingangs erwähnten Art neben einer optimalen Längs- und Querentblendung zusätzlich auch eine zuverlässige Diagonalentblendung in Blickrichtung zu schaffen.The invention is therefore based on the object of providing, in addition to an optimal longitudinal and transverse glare control, also reliable diagonal glare control in the direction of view in the case of a lamella element of the type mentioned at the outset.

Diese Aufgabe wird erfindungsgemäß mit den im Kennzeichen des Hauptanspruchs angegebenen Mitteln gelöst.This object is achieved with the means specified in the characterizing part of the main claim.

Aus dem DE-U-81 06 507 ist ein Leuchtenraster der gattungsgemäßen Art bekannt geworden mit von der Blattmitte zu den seitlichen Längsstegen hin in der Höhe zunehmenden Querstegen. Dabei werden zwar V-förmige.Rasterstege benutzt, die jedoch eine gleichbleibende Höhe und Breite aufweisen, während eine ihre Oberseite abdeckende Leiste ihrerseits eine konkave Form aufweist. Auf diese Weise läßt sich jedoch nicht das mit der Erfindung angestrebte Ergebnis erzielen, daß nämlich zwischen den Querstegen konvexe Durchtrittsöffnungen entstehen.From DE-U-81 06 507 a luminaire grid of the generic type has become known with transverse webs increasing in height from the center of the sheet to the lateral longitudinal webs. V-shaped grid bars are used, but they have a constant height and width, while a bar covering their top side has a concave shape. In this way, however, it is not possible to achieve the result sought with the invention, namely that convex through openings are created between the transverse webs.

Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben.Advantageous developments of the invention are specified in the subclaims.

Die Erfindung wird nachstehend anhand von in der Zeichnung dargestellten Ausführungsbeispielen des Erfindungsgegenstandes näher erläutert. Es zeigen

  • Fig. 1 eine Unteransicht einer ersten Ausführungsform der Querstege,
  • Fig. 2 eine Vorderansicht zu Fig. 1,
  • Fig. 3 einen Schnitt gemäß der Linie AB in Fig. 2,
  • Fig. 4 einen Schnitt gemäß der Linie CD in Fig. 2,
  • Fig. 5 eine Unteransicht einer zweiten Ausführungsform der Querstege,
  • Fig. 6 eine Vorderansicht zu Fig. 5,
  • Fig. 7 einen Schnitt gemäß Linie AB in Fig. 6,
  • Fig. 8 einen Schnitt gemäß Linie CD in Fig. 6,
  • Fig. 9 ein Reflektionsschema an einem Teillängsschnitt durch die Blattmitte der Querstege,
  • Fig. 10 ein Reflektionsschema zu Fig. 6,
  • Fig. 11 ein Reflektionsschema zu Fig. 2.
The invention is explained in more detail below with reference to exemplary embodiments of the subject matter shown in the drawing. Show it
  • 1 is a bottom view of a first embodiment of the crosspieces,
  • 2 is a front view of FIG. 1,
  • 3 shows a section along the line AB in FIG. 2,
  • 4 shows a section along the line CD in FIG. 2,
  • 5 is a bottom view of a second embodiment of the crosspieces,
  • 6 is a front view of FIG. 5,
  • 7 shows a section along line AB in FIG. 6,
  • 8 shows a section along line CD in FIG. 6,
  • 9 is a reflection diagram on a partial longitudinal section through the center of the sheet of the crosspieces,
  • 10 shows a reflection diagram for FIG. 6,
  • 11 shows a reflection diagram for FIG. 2.

Die Leuchtenelemente bestehen aus Längsstegen 1 und Querstegen (Lamellen) 2. Die Lamellenelemente sind mit einem Rastmechanismus 4 aus Kunststoff oder Metall ausgerüstet und können werkzeuglos in Blech- oder Aluminiumkanäle eingeclipst werden.The lamp elements consist of longitudinal webs 1 and transverse webs (slats) 2. The slat elements are equipped with a locking mechanism 4 made of plastic or metal and can be clipped into sheet metal or aluminum channels without tools.

Die Längsstege 1 sind innen parabolisch oder auch zylindrisch oder in Stufen gewickelt geformt ; sie können aber auch im Extrem-fall, wie bei 11 angedeutet, gerade verlaufen. Die Querstege 2 sind außen angenähert parabolisch gestaltet und an den Oberkanten 7 konkav ausgebildet. Außerdem sind sie zur Materialeinsparung bei 12 V-förmig ausgeschnitten. Durch diese Maßnahme werden störende Reflexe einer Lichtquelle 3 im Innenraum der Leuchten von der Oberkante der Lamelle 7 vermieden. Diese entblendende Virkung kann dadurch verstärkt werden, daß die V-Ausschnitte 12 innen schwarz gehalten werden.The longitudinal webs 1 are parabolic or cylindrical in shape or wound in stages; in extreme cases, as indicated at 11, they can also run straight. The transverse webs 2 are designed approximately parabolically on the outside and are concave at the upper edges 7. They are also cut out at 12 V to save material. This measure prevents disturbing reflections from a light source 3 in the interior of the lights from the upper edge of the lamella 7. This anti-glare effect can be increased by keeping the V-cutouts 12 black on the inside.

Die Unterkanten der Querstege 2 können eine gerade Form 5 oder eine konvexe Form 8 aufweisen oder wie die Oberkanten 7 auch eine konkave Form 6 haben.The lower edges of the transverse webs 2 can have a straight shape 5 or a convex shape 8 or, like the upper edges 7, also have a concave shape 6.

In allen Ausführungsformen nimmt jedoch gemäß der Erfindung die Quersteg-Blatthöhe vom Mittelbereich A-B zu den Seitenbereichen stark zu (Fig. 2 und 6), wie auch die Blattdicke b1 zu b2 (Fig. 3, 4, 7, 8) von innen nach außen zunimmt. Die Lichtdurchtrittsöffnungen 10 in Fig. 1 und 5 sind dadurch konvex geformt.In all embodiments, however, according to the invention, the crossbar leaf height increases sharply from the central region AB to the side regions (FIGS. 2 and 6), as does the leaf thickness b 1 to b 2 (FIGS. 3, 4, 7, 8) from the inside increases to the outside. As a result, the light passage openings 10 in FIGS. 1 and 5 are convex in shape.

Die parabolisch angenähert zylindrische oder auch gerade Ausbildung der Längsstege 1, 11 und der Querstege (Lamellen) 2 erzeugt einen vorbestimmten Abblendwinkel a der Lichtquelle 3 in Längsrichtung (Fig. 9) und in Querrichtung (Fig. 10 ß und γ ; Fig.11 β und γ). Die Lichtquelle ist in Fig. 10 und in Fig. 11 in Querrichtung mit dem Winkel ß entblendet, die Querreflexion der Lichtquelle 3 erfolgt über die verspiegelte oder weiße parabolisch geformte (in Annäherung zylindrische) Fläche 1 mit dem Abstrahlungswinkel y. Bei Querwinkeln < β ist die Lichtquelle entblendet. Die Längsentblendung wird erreicht durch das Schrittmaß « S (Fig. 9) der Querstege 2 sowie durch das parabolisch geformte Lamellenblatt 2 (in Annäherung zylindrisch geformt). Strahlen in Längsrichtung ausgehend vom Punkt « a » (Fig. 9 ; Fig. 1; Fig. 5) zum Punkt « a » können nur in Winkeln ≧α die Lamelle passieren, alle weiteren Lichtstrahlen 9 in Längsrichtung werden mit Winkeln ν > a reflektiert. Die Lamelle sorgt mit den Winkeln « α in Längsrichtung und « β » in Querrichtung für die Entblendung der Lichtquelle 3.The parabolically approximately cylindrical or straight design of the longitudinal webs 1, 11 and the transverse webs (lamellae) 2 produces a predetermined cut-off angle α of the light source 3 in the longitudinal direction (FIG. 9) and in the transverse direction (FIG. 10 β and γ; FIG. 11 β and γ). The light source is glare-free in FIG. 10 and FIG. 11 in the transverse direction with the angle β, the transverse reflection of the light source 3 takes place via the mirrored or white parabolically shaped (approximately cylindrical) surface 1 with the radiation angle y. The light source is glare-free at transverse angles <β. The longitudinal glare control is achieved by the increment “S (FIG. 9) of the transverse webs 2 and by the parabolically shaped lamella blade 2 (approximately cylindrical in shape). Rays in the longitudinal direction starting from point “a” (FIG. 9; FIG. 1; FIG. 5) to point “a” can only pass the lamella at angles ≧ α, all further light beams 9 in the longitudinal direction are reflected with angles ν> a . With the angles «α in the longitudinal direction and« β »in the transverse direction, the lamella ensures that the light source 3 is glare-free.

Der Winkel der überaus wichtigen Diagonalentblendung, dargestellt in Fig. 1 und Fig. 5 zwischen den Punkten « b » und « b' » « wird durch folgende Maßnahmen stark vergrößert :The angle of the extremely important diagonal glare control, shown in FIGS. 1 and 5 between the points “b” and “b '”, is greatly increased by the following measures:

Die Blatthöhe der Lamellen (Fig. 2 und Fig. 6) nimmt durch die konkave Krümmung der Oberkante 7 vom Mittelbereich A-B zu den Seitenbereichen C-D stark an Höhe zu, wie das Verhältnis hi : h2 in Fig. 3 und 4 bzw. 7 und 8 erkennen läßt. In der Ausführung Fig. 2 ist die untere Lamellenform gerade 5 oder zur Verbesserung des Leuchtenbetriebswirkungsgrades konkav 6 ausgeführt.The leaf height of the lamellae (FIGS. 2 and 6) increases considerably in height due to the concave curvature of the upper edge 7 from the central region AB to the side regions CD, as does the ratio h i : h 2 in FIGS. 3 and 4 and 7 and 8 shows. In the embodiment of FIG. 2, the lower lamella shape is straight 5 or concave 6 to improve the lighting operating efficiency.

Durch diese Maßnahmen wird der durch die Punkte « b » und « b' in Fig. 1, 2, 5, 6 wiedergegebene Abblendwinkel so weit vergrößert, daß die Lichtquelle 3 und deren Spiegelbilder auch in der diagonalen Blickrichtung hinreichend entblendet sind.These measures increase the cut-off angle represented by the points “b” and “b 'in FIGS. 1, 2, 5, 6 to such an extent that the light source 3 and its mirror images are adequately glare-free even in the diagonal viewing direction.

Durch die Anhebung der Blatthöhe h zu den Seitenflächen 1 hin wird auch die Blattdicke im oberen Bereich verstärkt, Fig. 3 « bl zu Fig. 4 « b2 und Fig. 7 « bl zu Fig. 8 « b2 ». Dadurch entsteht in Fig. 1 und Fig. 5 eine konvexe Durchtrittsöffnung 10, was zur Vergrößerung des Winkels der Diagonalentblendung beiträgt.By increasing the sheet height h towards the side faces 1, the sheet thickness is also increased in the upper region, FIG. 3 "bl to Fig. 4" b 2 and Fig. 7 "bl to Fig. 8" b 2 ". This creates a convex passage opening 10 in FIGS. 1 and 5, which contributes to increasing the angle of the diagonal glare control.

Claims (5)

1. Louvre for elongated light sources, comprising longitudinal webs (1) and V-shaped transverse webs (2), the sides of said transverse webs in cross section, are designed approximately parabolic and, in longitudinal direction, have a concave upper edge (7), characterized in that the transverse webs (2), starting from their centre (A-B), increase towards the lateral longitudinal webs (1) in height and in width.
2. Louvre according to claim 1, characterized in that the lower edge (8) of the transverse webs (2) is designed in a convex manner.
3. Louvre according to claim 1, characterized in that the lower edge (6) of the transverse webs (2) is designed in a concave manner.
4. Louvre according to claim 1, characterized in that the lower edge (5) of the transverse webs (2) is designed in a straight manner.
5. Louvre according to anyone of claims 1 through 4, characterized in that the passage opening (10) between each pair of transverse webs (2) is designed in a convex manner.
EP84730107A 1983-10-18 1984-10-05 Parabolic strip element for elongated lamps Expired EP0138747B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84730107T ATE32135T1 (en) 1983-10-18 1984-10-05 PARABOLIC BLADE ELEMENT FOR ELONGED LIGHT SOURCES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19838330299U DE8330299U1 (en) 1983-10-18 1983-10-18 PARABOLIC BLADE ELEMENT FOR LONG-STRETCHED LIGHT SOURCES
DE8330299U 1983-10-18

Publications (2)

Publication Number Publication Date
EP0138747A1 EP0138747A1 (en) 1985-04-24
EP0138747B1 true EP0138747B1 (en) 1988-01-20

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ID=6758155

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84730107A Expired EP0138747B1 (en) 1983-10-18 1984-10-05 Parabolic strip element for elongated lamps

Country Status (3)

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EP (1) EP0138747B1 (en)
AT (1) ATE32135T1 (en)
DE (2) DE8330299U1 (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4882662A (en) * 1987-02-17 1989-11-21 Siemens Aktiengesellschaft Grid of lamellae for a lamp
NL9302169A (en) * 1993-12-13 1995-07-03 Simon Cornelis Van Putten Transverse lamella for a light box
NL9301557A (en) * 1993-09-09 1995-04-03 Simon Cornelis Van Putten Transverse lamella for a light box
ATE187538T1 (en) * 1993-09-09 1999-12-15 Veko Products B V CROSS SLATS FOR LIGHT BOX
NZ300261A (en) * 1995-02-14 1997-11-24 Philips Electronics Nv Luminaire with lamellae having concave outer edges for providing more uniform illumination
FR2738623A1 (en) * 1995-09-13 1997-03-14 Philips Eclairage Fluorescent light fitting with improved louvred cover
ES2272038T3 (en) * 1998-05-19 2007-04-16 Koninklijke Philips Electronics N.V. LUMINARY.
NL1011025C2 (en) * 1999-01-14 2000-07-17 Juliette Simone Catharina Van Fluorescent lighting assembly has transverse laminae which have narrow section and provide greater light output than from conventional assembly
DE19916601C2 (en) * 1999-04-13 2002-08-01 Siteco Beleuchtungstech Gmbh Slat, luminaire grid for glare control and luminaire
EP1113219B1 (en) 1999-12-27 2008-01-02 Ludwig Leuchten KG Lamp
DE10040501B4 (en) * 2000-08-18 2006-11-30 Siteco Beleuchtungstechnik Gmbh Round light, grid for round light and slat for round light
GB0029532D0 (en) 2000-12-04 2001-01-17 Webb Steven P Reflector for a linear light source and louvre controller incorporating the same
DE60223066T2 (en) * 2001-11-01 2008-07-17 Koninklijke Philips Electronics N.V. LIGHT AND LIGHT GRID FOR SUCH LUMINAIRE
CN1625667B (en) * 2002-01-28 2012-12-05 皇家飞利浦电子股份有限公司 Luminaire with lamellas for tubular lamp
DE102004039676A1 (en) * 2004-08-16 2006-02-23 Zumtobel Staff Gmbh grid array
CN201407599Y (en) * 2009-04-24 2010-02-17 富昱电机股份有限公司 Lighting tube luminaire

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8106507U1 (en) * 1981-03-07 1981-08-27 Trilux-Lenze Gmbh + Co Kg, 5760 Arnsberg "LUMINAIRE WITH A LONG ELASTIC LAMP AND A MIRROR GRID BELOW IT"
EP0122972A1 (en) * 1983-04-08 1984-10-31 Christian Bartenbach Non-dazzling light fixture with an elongated light source

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3024355A (en) * 1959-12-07 1962-03-06 Willis L Lipscomb Curved, cellular light control panel
DE3112210C2 (en) * 1981-03-27 1985-01-10 Siemens AG, 1000 Berlin und 8000 München Mirror light

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8106507U1 (en) * 1981-03-07 1981-08-27 Trilux-Lenze Gmbh + Co Kg, 5760 Arnsberg "LUMINAIRE WITH A LONG ELASTIC LAMP AND A MIRROR GRID BELOW IT"
EP0122972A1 (en) * 1983-04-08 1984-10-31 Christian Bartenbach Non-dazzling light fixture with an elongated light source

Also Published As

Publication number Publication date
EP0138747A1 (en) 1985-04-24
ATE32135T1 (en) 1988-02-15
DE8330299U1 (en) 1984-04-12
DE3468930D1 (en) 1988-02-25

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