EP0122972B1 - Non-dazzling light fixture with an elongated light source - Google Patents

Non-dazzling light fixture with an elongated light source Download PDF

Info

Publication number
EP0122972B1
EP0122972B1 EP83112800A EP83112800A EP0122972B1 EP 0122972 B1 EP0122972 B1 EP 0122972B1 EP 83112800 A EP83112800 A EP 83112800A EP 83112800 A EP83112800 A EP 83112800A EP 0122972 B1 EP0122972 B1 EP 0122972B1
Authority
EP
European Patent Office
Prior art keywords
light source
angle
light
reflectors
longitudinal
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
EP83112800A
Other languages
German (de)
French (fr)
Other versions
EP0122972A1 (en
Inventor
Christian Bartenbach
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AU25445/84A priority Critical patent/AU561926B2/en
Publication of EP0122972A1 publication Critical patent/EP0122972A1/en
Application granted granted Critical
Publication of EP0122972B1 publication Critical patent/EP0122972B1/en
Expired legal-status Critical Current

Links

Images

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
    • 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 present invention relates to a luminaire with a rod-shaped light source and to both longitudinal sides of the light source up to this extending such concave reflectors that all rays emitted transversely to the light source directly or after reflection at a steeper than a luminaire-specific fade-out angle a in the transverse direction and with transversely to the vertical central longitudinal plane of the light source, approximately V-shaped lamellae with reflecting, concave curved side surfaces in such a way that all rays emitted in the longitudinal direction of the light source emerge in the longitudinal direction directly or after reflection at a steeper than a lamp-specific cut-out angle ⁇ and the upper sides the slats are closed by flat reflective covers.
  • the surface of the lamellae running transversely to the light source is therefore designed to be reflective in order to also reflect the light rays hitting the lamellae from above and finally to let them emerge from the luminaire. Otherwise, the efficiency of the luminaire would be reduced not insignificantly, since the lamellae must be arranged at relatively small distances from one another, the intended purpose of masking out emerging rays should be achieved.
  • a major disadvantage of the known design is that the rays reflected from the top of the lamellae emerge for a considerable part flatter than specified, and thus a reflection of the light source is created for the viewer, which ultimately leads to glare. This reflection is particularly annoying when working on display devices. To avoid this, it has already been proposed to blacken the top of the slats or to make them open at the top; in both cases, however, the already mentioned loss of efficiency occurs, which can be up to 20%.
  • the covers of the slats for guiding light into the space above the lamp have sections inclined to the vertical lamp plane. These inclined sections can be concavely curved, for example. Due to this configuration, some of the rays reflected by the light source may be reflected in the space above the light source by the inclined covers, but it is precisely in the critical areas where the lamellae pass into the reflectors that reflections still occur, which are related to the lead to undesirable brightening.
  • the invention is based on the object, starting from a lamp of the type described above, to improve it in such a way that the entire covering area of the slats reflects the incident light rays in such a way that complete freedom from glare is achieved.
  • the lamellae are shaped such that two lamella sections are formed which are arranged symmetrically with respect to the central vertical longitudinal plane, the flat upper sides of which, starting from below the light source, at an inclination angle corresponding approximately to the cut-out angle ⁇ , obliquely to the longitudinal plane and parallel and with a small angle Distance to the tangent extending at the same angle of inclination to the light source to the reflectors and the two inclined slat sections are connected by a slat section running perpendicular to the central longitudinal plane of the light source, the length of which is smaller than the diameter of the light source.
  • the cover of the slats is therefore not curved design, the cover of the slats, but the covering of the blade flat and the louver itself has a geneig to the longitudinal plane of the light source - th course, from below the light source to above the light source.
  • This course of the slats according to the invention ensures that reflections in the disturbing blinking angle range, which is defined by the blanking angle ⁇ , are avoided on the reflectors, since the slats run in this area.
  • complete absence of glare is achieved below the fade-out angle a, without a significant loss in efficiency due to absorption of the light rays striking the top of the slats.
  • the theoretically best solution is a flat top, which would touch the light source tangentially.
  • the invention provides for a tangential approach of the top of the lamellae to the light source, however, a constructionally determined distance is maintained.
  • Lights of the known type see Fig. 1, have a rod-shaped light source (fluorescent tube) 1, around which a reflector 2 is arranged. Its contour is determined in such a way that each light beam reflected by it is steeper than that Beam 3 leaves the lamp, which touches the light source at its lower edge and the lower edge of the reflector 2.
  • the angle a is therefore the cross-hatching angle.
  • slats 4 are provided transversely to the longitudinal axis of the light source 1, the height and mutual spacing of which are selected such that all rays are reflected by the concave side surfaces 5 , which leave the light source flatter than that beam 6 which touches the upper or lower edge of the opposite side faces 5 of two adjacent slats 4.
  • This beam 6 forms an angle ⁇ with the horizontal.
  • the angle ⁇ is the blanking angle in the longitudinal direction and is generally of the same order of magnitude as the angle a in the transverse direction.
  • the slats 4 have a course of their upper side 8 in such a way that two slat sections are formed, which are arranged symmetrically to the central vertical longitudinal plane of the light source 1, the upper sides 8, starting from below the light source 1, at an inclination angle corresponding approximately to the fade-out angle ⁇ run obliquely to the horizontal to the longitudinal plane with opposite increase. This results in a tangential but non-contact approach of the flat upper sides 8 to the light source 1.
  • the two lamella sections end in the side reflectors 2.
  • the two inclined slat sections are connected by a slat section 10 running perpendicular to the central longitudinal plane of the light source 1, so that a horizontal slat course results below the light source 1.
  • a slat course corresponding to the surface of the light source would be ideal here.
  • the horizontal slat section is preferable for manufacturing reasons.
  • the lower longitudinal edge of the slats 4 runs parallel to the top 8 of the slats.
  • the width of the lamella according to the invention does not differ from that of the embodiment known in FIGS. 1 and 2, and light losses which would occur with a wider lamella shape are avoided.
  • the beam 7a in FIG. 3 which leaves the light source 1 at the same point and at the same angle as the beam 7 in FIG. 1, the beam 7a is deflected upward more than the beam 7 and leaves the one according to the invention Luminaire after reflection on reflector 2 is very steep, so that glare-free radiation from light source 1 takes place.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Glass Compositions (AREA)
  • Inorganic Insulating Materials (AREA)
  • Polymerisation Methods In General (AREA)

Abstract

Light fixtures with a rod-shaped light source (1) and with concave reflectors on both longitudinal sides of the light source. The concave reflectors extend above the light source, and have a curvature such that all light rays reflected across the light source will emerge in the transverse direction either directly or after reflection at an angle that is steeper than a light-specific masking angle ( alpha ). The reflectors include lamellae (4) that have an approximately V-shaped cross section and run across the middle vertical longitudinal plane of the light source and have reflecting concave side surfaces with a curvature such that all light rays reflected in the longitudinal direction of the light source (1) will emerge in the longitudinal direction either directly or after reflection at an angle that is steeper than a light-specific masking angle ( beta ). The top sides (8) of the lamellae are covered by a flat reflecting cover, and the lamellae are shaped so as to form two lamellar sections that are symmetrical with the middle vertical longitudinal plane; their flat top sides, starting below the light source, form an angle with the longitudinal plane that approximately corresponds to the masking angle ( alpha ) and have the opposite slopes such that they are in tangential proximity to the light source (1) but do not come in contact with it, and they extend as far as the reflectors (2).

Description

Die vorliegende Erfindung betrifft eine Leuchte mit einer stabförmigen Lichtquelle und zu beiden Längsseiten der Lichtquelle bis oberhalb dieser sich erstreckenden derart konkav gekrümmten Reflektoren, dass alle quer zur Lichtquelle abgestrahlten Strahlen direkt oder nach Reflexion unter einem steileren als einem leuchtenspezifischen Ausblendwinkel a in Querrichtung austreten und mit quer zur vertikalen mittleren Längsebene der Lichtquelle verlaufenden, im Querschnitt etwa V-förmigen Lamellen mit reflektierenden, derart konkav gekrümmten Seitenflächen, dass alle in Längsrichtung der Lichtquelle abgestrahlten Strahlen direkt oder nach Reflexion unter einem steileren als einem leuchtenspezifischen Ausblendwinkel β in Längsrichtung austreten und die Oberseiten der Lamellen durch ebene reflektierende Abdeckungen verschlossen sind.The present invention relates to a luminaire with a rod-shaped light source and to both longitudinal sides of the light source up to this extending such concave reflectors that all rays emitted transversely to the light source directly or after reflection at a steeper than a luminaire-specific fade-out angle a in the transverse direction and with transversely to the vertical central longitudinal plane of the light source, approximately V-shaped lamellae with reflecting, concave curved side surfaces in such a way that all rays emitted in the longitudinal direction of the light source emerge in the longitudinal direction directly or after reflection at a steeper than a lamp-specific cut-out angle β and the upper sides the slats are closed by flat reflective covers.

In Leuchten der genannten Art wird die Oberfläche der quer zur Lichtquelle verlaufenden Lamellen deshalb spiegelnd ausgeführt, um auch die von oben auf die Lamellen auftreffenden Lichtstrahlen zu reflektieren und schliesslich aus der Leuchte austreten zu lassen. Anderenfalls würde der Wirkungsgrad der Leuchte nicht unwesentlich herabgesetzt werden, da ja die Lamellen in verhältnismässig kleinen Abständen zueinander angeordnet werden müssen, soll der angestrebte Zweck der Ausblendung flach austretender Strahlen erreicht werden. Ein wesentlicher Nachteil der bekannten Ausführung ist aber, dass die von der Oberseite der Lamellen reflektierten Strahlen zu einem erheblichen Teil flacher als vorgegeben austreten und damit für den Betrachter ein Spiegelbild der Lichtquelle entsteht, was letztlich doch zu einer Blendung führt. Besonders störend ist dieses Spiegelbild bei Arbeiten an Bildschirmgeräten. Um dies zu vermeiden, wurde bereits vorgeschlagen, die Oberseite der Lamellen zu schwärzen bzw. diese nach oben offen auszuführen; in beiden Fällen tritt jedoch der bereits erwähnte Wirkungsgradverlust auf, welcher bis zu 20% betragen kann.In luminaires of the type mentioned, the surface of the lamellae running transversely to the light source is therefore designed to be reflective in order to also reflect the light rays hitting the lamellae from above and finally to let them emerge from the luminaire. Otherwise, the efficiency of the luminaire would be reduced not insignificantly, since the lamellae must be arranged at relatively small distances from one another, the intended purpose of masking out emerging rays should be achieved. A major disadvantage of the known design, however, is that the rays reflected from the top of the lamellae emerge for a considerable part flatter than specified, and thus a reflection of the light source is created for the viewer, which ultimately leads to glare. This reflection is particularly annoying when working on display devices. To avoid this, it has already been proposed to blacken the top of the slats or to make them open at the top; in both cases, however, the already mentioned loss of efficiency occurs, which can be up to 20%.

Weiterhin ist aus dem DE-U 8106507 eine Leuchte mit einer langgestreckten Lampe bekannt, wobei zur Vermeidung von starken Aufhellungen im Bereich der oberhalb der Lamellen liegenden Reflektorblechabschnitte die Abdeckungen der Lamellen zur Lichtlenkung in den Raum oberhalb der Lampe entsprechend zur vertikalen Lampenebene geneigte Abschnitte aufweisen. Diese geneigten Abschnitte können beispielsweise konkav gekrümmt sein. Aufgrund dieser Ausgestaltung mag zwar ein Teil der von der Lichtquelle reflektierten Strahlen in den Raum oberhalb der Lichtquelle von den geneigten Abdekkungen reflektiert werden, jedoch gerade in den kritischen Bereichen, wo die Lamellen in die Reflektoren übergehen, entstehen nach wie vor Reflexionen, die zu den unerwünschten Aufhellungen führen.Furthermore, from DE-U 8106507 a luminaire with an elongated lamp is known, in order to avoid strong brightening in the region of the reflector sheet metal sections above the slats, the covers of the slats for guiding light into the space above the lamp have sections inclined to the vertical lamp plane. These inclined sections can be concavely curved, for example. Due to this configuration, some of the rays reflected by the light source may be reflected in the space above the light source by the inclined covers, but it is precisely in the critical areas where the lamellae pass into the reflectors that reflections still occur, which are related to the lead to undesirable brightening.

Der Erfindung liegt nun die Aufgabe zugrunde, ausgehend von einer Leuchte der eingangs beschriebenen Art, diese derart zu verbessern, dass der gesamte Abdeckungsbereich der Lamellen die auftreffenden Lichtstrahlen derart reflektiert, dass eine vollständige Blendfreiheit erreicht wird.The invention is based on the object, starting from a lamp of the type described above, to improve it in such a way that the entire covering area of the slats reflects the incident light rays in such a way that complete freedom from glare is achieved.

Erfindungsgemäss wird dies dadurch erreicht, dass die Lamellen derart geformt sind, dass zwei zur mittleren vertikalen Längsebene symmetrisch angeordnete Lamellenabschnitte entstehen, deren ebene Oberseiten, ausgehend von unterhalb der Lichtquelle, unter einem etwa dem Ausblendwinkel a entsprechenden Neigungswinkel schräg zur Längsebene und parallel sowie mit geringem Abstand zur unter demselben Neigungswinkel verlaufenden Tangente an die Lichtquelle bis zu den Reflektoren verlaufen und die beiden geneigten Lamellenabschnitte durch einen senkrecht zur mittleren Längsebene der Lichtquelle unterhalb dieser verlaufenden Lamellenabschnitt verbunden sind, dessen Länge kleiner als der Durchmesser der Lichtquelle ist. Erfindungsgemäss wird demnach nicht die Abdeckung der Lamellen gekrümmt ausgeführt, vielmehr ist die Abdekkung der Lamelle eben, und die Lamelle selbst hat einen zur Längsebene der Lichtquelle geneig- ten Verlauf, und zwar von unterhalb der Lichtquelle bis oberhalb der Lichtquelle. Dabei stellt dieser erfindungsgemässe Verlauf der Lamellen sicher, dass Reflexionen im störenden Blinkwinkelbereich, der durch den Ausblendwinkel a definiert ist, an den Reflektoren vermieden werden, da in diesem Bereich die Lamellen verlaufen. Unterhalb des Ausblendwinkels a wird erfindungsgemäss völlige Blendfreiheit erzielt, ohne dass dabei ein nennenswerter Wirkungsgradverlust durch Absorption der auf der Oberseite der Lamellen auftreffenden Lichtstrahlen erfolgen würde. Die theoretisch beste Lösung bildet eine ebene Oberseite, welche die Lichtquelle tangential berühren würde. Aus konstruktiven und aus Toleranzgründen ist aber eine derartige Berührung der Lichtquelle durch die Lamellen nicht möglich. Aus diesem Grunde sieht die Erfindung eine tangentiale Annäherung der Oberseite der Lamellen an die Lichtquelle vor, wobei jedoch ein konstruktiv bedingter Abstand eingehalten wird.According to the invention, this is achieved in that the lamellae are shaped such that two lamella sections are formed which are arranged symmetrically with respect to the central vertical longitudinal plane, the flat upper sides of which, starting from below the light source, at an inclination angle corresponding approximately to the cut-out angle α, obliquely to the longitudinal plane and parallel and with a small angle Distance to the tangent extending at the same angle of inclination to the light source to the reflectors and the two inclined slat sections are connected by a slat section running perpendicular to the central longitudinal plane of the light source, the length of which is smaller than the diameter of the light source. According to the invention is therefore not curved design, the cover of the slats, but the covering of the blade flat and the louver itself has a geneig to the longitudinal plane of the light source - th course, from below the light source to above the light source. This course of the slats according to the invention ensures that reflections in the disturbing blinking angle range, which is defined by the blanking angle α, are avoided on the reflectors, since the slats run in this area. According to the invention, complete absence of glare is achieved below the fade-out angle a, without a significant loss in efficiency due to absorption of the light rays striking the top of the slats. The theoretically best solution is a flat top, which would touch the light source tangentially. For constructive and tolerance reasons, however, such contact of the light source by the slats is not possible. For this reason, the invention provides for a tangential approach of the top of the lamellae to the light source, however, a constructionally determined distance is maintained.

Vorteilhafte Ausführungsformen der Erfindung sind in den Unteransprüchen enthalten.Advantageous embodiments of the invention are contained in the subclaims.

Anhand der Figuren wird nun die Erfindung näher erläutert. Es zeigen:

  • Fig. 1 in schematischer Form einen Querschnitt durch eine bekannte Leuchte gemäss dem Stand der Technik,
  • Fig. 2 einen Längsschnitt durch die Leuchte gemäss Fig. 1,
  • Fig. 3 einen Querschnitt durch eine erfindungsgemässe Leuchte.
The invention will now be explained in more detail with reference to the figures. Show it:
  • 1 in schematic form a cross section through a known lamp according to the prior art,
  • 2 shows a longitudinal section through the lamp according to FIG. 1,
  • Fig. 3 shows a cross section through an inventive lamp.

Leuchten der bekannten Art, siehe Fig. 1, weisen eine stabförmige Lichtquelle (Leuchtröhre) 1 auf, um welche ein Reflektor 2 angeordnet ist. Dessen Kontur ist derart bestimmt, dass jeder durch ihn reflektierte Lichtstrahl steiler als jener Strahl 3 die Leuchte verlässt, der die Lichtquelle an ihrem unteren Rand und die untere Kante des Reflektors 2 berührt. Der Winkel a ist demnach der Ausblendwinkel in Querrichtung.Lights of the known type, see Fig. 1, have a rod-shaped light source (fluorescent tube) 1, around which a reflector 2 is arranged. Its contour is determined in such a way that each light beam reflected by it is steeper than that Beam 3 leaves the lamp, which touches the light source at its lower edge and the lower edge of the reflector 2. The angle a is therefore the cross-hatching angle.

Um auch in Längsrichtung der Leuchte eine Blendung durch flach austretende Strahlen zu verhindern, siehe Fig. 2, sind quer zur Längsachse der Lichtquelle 1 Lamellen 4 vorgesehen, deren Höhe und gegenseitiger Abstand derart gewählt sind, dass alle Strahlen durch die konkaven Seitenflächen 5 reflektiert werden, welche die Lichtquelle flacher als jener Strahl 6 verlassen, der die obere bzw. untere Kante der gegenüberliegenden Seitenflächen 5 zweier benachbarter Lamellen 4 tangiert. Dieser Strahl 6 bildet mit der Horizontalen einen Winkel β. Der Winkel β ist der Ausblendwinkel in Längsrichtung und ist in der Regel von derselben Grössenordnung wie der Winkel a in Querrichtung.In order to prevent glare from flatly emerging rays in the longitudinal direction of the lamp, see FIG. 2, slats 4 are provided transversely to the longitudinal axis of the light source 1, the height and mutual spacing of which are selected such that all rays are reflected by the concave side surfaces 5 , which leave the light source flatter than that beam 6 which touches the upper or lower edge of the opposite side faces 5 of two adjacent slats 4. This beam 6 forms an angle β with the horizontal. The angle β is the blanking angle in the longitudinal direction and is generally of the same order of magnitude as the angle a in the transverse direction.

Wie Fig. 1 zeigt, gibt es Strahlen, welche die Leuchte unter einem Winkel verlassen, welcher kleiner als der Winkel a ist, wenn die Oberseite 8 der Lamellen 4 zur Vermeidung von Lichtverlusten spiegelnd ausgeführt ist. Dies wird anhand des Strahles 7 näher erläutert. Die Neigung der Reflektorwand im Punkt 9 ist so bestimmt, dass ein vom unteren Rand der Lichtquelle 1 ausgehender Strahl dort unter dem Winkel a zur Waagerechten reflektiert wird. Der Strahl 7 jedoch, welcher kurz vorher an der Oberseite 8 der Lamelle 4 nach oben reflektiert wird, wird am Punkt 9 weniger stark nach unten umgelenkt und verlässt die Leuchte unter einem Winkel y, welcher kleiner als der Ausblendwinkel a ist. Wie in Fig. 2 angedeutet, betrifft diese Erscheinung nur Strahlen, welche aus der Lichtquelle 1 schräg austreten. Insgesamt ergibt sich jedoch für einen verhältnismässig flach auf die Leuchte hochblikkenden Beschauer ein Spiegelbild der Lichtquelle 1 und damit eine Blendung.As shown in FIG. 1, there are rays which leave the lamp at an angle which is smaller than the angle a if the top side 8 of the slats 4 is designed to be mirror-like to avoid light losses. This is explained in more detail using the beam 7. The inclination of the reflector wall at point 9 is determined such that a beam emanating from the lower edge of the light source 1 is reflected there at an angle a to the horizontal. However, the beam 7, which is reflected upwards shortly beforehand on the upper side 8 of the lamella 4, is deflected downward less strongly at the point 9 and leaves the lamp at an angle y which is smaller than the masking angle a. As indicated in FIG. 2, this phenomenon only affects rays that emerge at an angle from the light source 1. Overall, however, a mirror image of the light source 1 and thus glare results for a viewer who looks up at the lamp relatively flat.

In Fig.3 ist eine erfindungsgemässe Leuchte dargestellt, wobei die vorbeschriebene Blendung vermieden wird. Hierzu weisen die Lamellen 4 einen Verlauf ihrer Oberseite 8 derart auf, dass zwei Lamellenabschnitte entstehen, die symmetrisch zur mittleren vertikalen Längsebene der Lichtquelle 1 angeordnet sind, wobei die Oberseiten 8, ausgehend von unterhalb der Lichtquelle 1, unter einem etwa dem Ausblendwinkel a entsprechenden Neigungswinkel zur Horizontalen schräg zur Längsebene mit entgegengesetzter Steigerung verlaufen. Dabei ergibt sich eine tangentiale, jedoch berührungsfreie Annäherung der ebenen Oberseiten 8 an die Lichtquelle 1. Die beiden Lamellenabschnitte enden in den seitlichen Reflektoren 2. Dabei ist jedoch ein gewisser Abstand der ebenen Oberflächen 8 zur Lichtquelle aus Toleranz- und Herstellungsgründen eingehalten, so dass sich der erfindungsgemäss angestrebte tangentiale Verlauf mit tangentialer Berührung nicht ergibt. Dadurch ergibt sich jedoch beim Gebrauch der erfindungsgemässen Leuchte kein messbarer Nachteil. Weiterhin ist erfindungsgemäss vorgesehen, dass die beiden geneigten Lamellenabschnitte durch einen senkrecht zur mittleren Längsebene der Lichtquelle 1 verlaufenden Lamellenabschnitt 10 verbunden sind, so dass sich unterhalb der Lichtquelle 1 ein horizontaler Lamellenverlauf ergibt. Ideal wäre hier ein Lamellenverlauf entsprechend der Oberfläche der Lichtquelle. Aus Herstellungsgründen ist jedoch der horizontale Lamellenabschnitt vorzuziehen. Weiterhin ist es vorteilhaft, dass die untere Längskante der Lamellen 4 parallel zur Lamellenoberseite 8 verläuft. Hierdurch unterscheidet sich die Breite der erfindungsgemässen Lamelle nicht von denen der in den Fig. 1 und 2 bekannten Ausführungsform, und es werden Lichtverluste vermieden, die bei einer breiteren Lamellenform auftreten würden. Wie am Beispiel des Strahles 7a in Fig. 3 gezeigt ist, welcher die Lichtquelle 1 am gleichen Punkt und unter demselben Winkel verlässt wie der Strahl 7 in Fig. 1, wird der Strahl 7a stärker als der Strahl 7 nach oben umgelenkt und verlässt die erfindungsgemässe Leuchte nach Reflexion am Reflektor 2 sehr steil, so dass eine blendfreie Abstrahlung von der Lichtquelle 1 erfolgt.3 shows a luminaire according to the invention, the above-described glare being avoided. For this purpose, the slats 4 have a course of their upper side 8 in such a way that two slat sections are formed, which are arranged symmetrically to the central vertical longitudinal plane of the light source 1, the upper sides 8, starting from below the light source 1, at an inclination angle corresponding approximately to the fade-out angle α run obliquely to the horizontal to the longitudinal plane with opposite increase. This results in a tangential but non-contact approach of the flat upper sides 8 to the light source 1. The two lamella sections end in the side reflectors 2. However, a certain distance between the flat surfaces 8 and the light source is maintained for reasons of tolerance and manufacturing, so that the tangential course desired according to the invention with tangential contact does not result. However, this does not result in a measurable disadvantage when using the lamp according to the invention. It is further provided according to the invention that the two inclined slat sections are connected by a slat section 10 running perpendicular to the central longitudinal plane of the light source 1, so that a horizontal slat course results below the light source 1. A slat course corresponding to the surface of the light source would be ideal here. However, the horizontal slat section is preferable for manufacturing reasons. Furthermore, it is advantageous that the lower longitudinal edge of the slats 4 runs parallel to the top 8 of the slats. As a result, the width of the lamella according to the invention does not differ from that of the embodiment known in FIGS. 1 and 2, and light losses which would occur with a wider lamella shape are avoided. As shown in the example of the beam 7a in FIG. 3, which leaves the light source 1 at the same point and at the same angle as the beam 7 in FIG. 1, the beam 7a is deflected upward more than the beam 7 and leaves the one according to the invention Luminaire after reflection on reflector 2 is very steep, so that glare-free radiation from light source 1 takes place.

Claims (2)

1. A light fixture comprising a rod-shaped light source (1) and reflectors (2) extending on both longitudinal sides of the light source (1) and above it and made concave so that all rays emitted transversely to the light source (1) emerge in the transverse direction either directly or after reflection at an angle steeper than a masking angle a specific to the lamp, the lamp also comprising plates (4) having a substantially V-shaped cross-section and extending transversely to the vertical central longitudinal plane of the light source (1) and having reflecting side surfaces which are made concave so that all rays emitted in the longitudinal direction of the light source (1) emerge in the longitudinal direction either directly or after reflection at an angle steeper than a masking angle β specific to the lamp, and the upper sides (8) of the plates (4) are enclosed by plane reflecting covers, characterised in that the plates (4) are shaped so as to form two portions symmetrical to the central vertical longitudinal plane and having flat upper sides which extend as far as the reflectors (2), starting below the light source (1) at an angle to the longitudinal plane substantially equal to the masking angle a and parallel to and at a slight distance from the tangent to the light source (1) extending at the same angle of inclination, and the two inclined plate portions are connected by a plate portion (10) extending perpendicular to the central longitudinal plane of the light source (1) and below it, the last- mentioned plate portion being shorter than the diameter of the light source (1).
2. A light fixture according to claim 1, characterised in that the bottom longitudinal edge of the plates (4) extends parallel to the upper side (8) of the plates.
EP83112800A 1983-04-08 1983-12-20 Non-dazzling light fixture with an elongated light source Expired EP0122972B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU25445/84A AU561926B2 (en) 1983-04-08 1984-03-09 Nonglare light fixture

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0124683A AT381577B (en) 1983-04-08 1983-04-08 GLARE-FREE LAMP FOR A ROD-SHAPED LIGHT SOURCE
AT1246/83 1983-04-08

Publications (2)

Publication Number Publication Date
EP0122972A1 EP0122972A1 (en) 1984-10-31
EP0122972B1 true EP0122972B1 (en) 1987-10-28

Family

ID=3509757

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83112800A Expired EP0122972B1 (en) 1983-04-08 1983-12-20 Non-dazzling light fixture with an elongated light source

Country Status (7)

Country Link
US (1) US4539628A (en)
EP (1) EP0122972B1 (en)
JP (1) JPS60205903A (en)
AT (2) AT381577B (en)
CA (1) CA1220460A (en)
DE (1) DE3374213D1 (en)
ZA (1) ZA841999B (en)

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8330299U1 (en) * 1983-10-18 1984-04-12 Semperlux Gmbh, 1000 Berlin PARABOLIC BLADE ELEMENT FOR LONG-STRETCHED LIGHT SOURCES
FR2554549B1 (en) * 1983-11-03 1988-03-11 Sabir ANTI-GLARE DEVICE FOR LUMINAIRES WITH LINEAR SOURCES
DE3406447C2 (en) * 1984-02-22 1995-03-16 Christian Bartenbach Shielding for a lamp with a rod-shaped lamp
JPS644168Y2 (en) * 1984-12-20 1989-02-03
HU195593B (en) * 1985-10-01 1988-05-30 Tungsram Reszvenytarsasag Light-source, preferably for public lighting and industrial applications
US4750097A (en) * 1985-10-25 1988-06-07 Optech Inc. Lamp reflector assembly
US4754381A (en) * 1986-01-02 1988-06-28 Downs James W Ellipsoidal reflector concentration of energy system
BE905874A (en) * 1986-12-08 1987-04-01 Etap Nv INTERIOR LIGHT SPOTS PROTECTIVE LIGHTING UNIT WITH MIRROR REFLECTORS.
DE8702921U1 (en) * 1987-02-25 1987-07-30 Metaprint Metallverarbeitung GmbH, 8000 München lamp
US4888668A (en) * 1987-09-28 1989-12-19 Siemens Aktiengesellschaft Mirror light unit
DE3900202A1 (en) * 1989-01-05 1990-07-12 Thorn Licht Gmbh GRID LAMP EQUIPPED WITH A STAINLESS FLUORESCENT LAMP
JP2917996B2 (en) * 1989-06-19 1999-07-12 東芝ライテック株式会社 lighting equipment
US5469341A (en) * 1993-09-10 1995-11-21 Public Safety Equipment, Inc. Light bar with reflector assembly
EP0757772B1 (en) * 1995-02-14 2000-05-03 Koninklijke Philips Electronics N.V. Luminaire
FR2734044B1 (en) * 1995-05-11 1997-08-01 Vial Henri Noel SCREEN GRID FOR FLUORESCENT LIGHTING
AU6475296A (en) * 1995-08-04 1997-03-05 Pang Teng Ong Process for producing the profile of reflectors for a cylindical source of light and reflector obtained according to thi process
US5528478A (en) * 1995-10-04 1996-06-18 Cooper Industries, Inc. Lighting fixture having a parabolic louver
FR2742213B1 (en) * 1995-12-08 1998-02-27 Hode Jean Pierre CEILING REFLECTIVE OPTICS
USD377231S (en) * 1996-03-19 1997-01-07 Cooper Industries, Inc. Luminaire
JP4037460B2 (en) * 1996-10-08 2008-01-23 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ lighting equipment
DE69933410T2 (en) * 1998-05-19 2007-08-02 Koninklijke Philips Electronics N.V. lamp
GB9908728D0 (en) * 1999-04-17 1999-06-09 Luxonic Lightng Plc A lighting appliance
JP2003515240A (en) * 1999-11-12 2003-04-22 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Lighting without lamella
PL357189A1 (en) * 2000-02-29 2004-07-26 Lt-Licht-Technik Gmbh Reflector arrangement for a lamp
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
AT500432B8 (en) * 2003-04-07 2007-02-15 Bartenbach Christian ILLUMINATION DEVICE
GB2415770A (en) * 2004-07-01 2006-01-04 Jamie Barrett A lamp sculpture
NL1027815C2 (en) 2004-12-17 2006-06-20 Lichtholland B V Lamella (52) is for a reflector (2) for a light fitting for a tube lamp and comprises two opposing main sides, an upper side and a lower side (8), all sides having a light-reflecting surface
DE112014004071T5 (en) * 2013-09-05 2016-06-09 Applied Materials, Inc. Lamp cross-section for reduced coil heating

Citations (1)

* 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"

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3124310A (en) * 1964-03-10 lipscomb
US1153443A (en) * 1910-04-30 1915-09-14 Cooper Hewitt Electric Co Reflector for vapor-lamps.
US2299276A (en) * 1941-03-07 1942-10-20 Kirlin Ivan Disk louver
DE1287031B (en) * 1964-06-25 1969-01-16 Schmitt Mirror reflectors for surface illuminating light sources, especially fluorescent lamps
US3382357A (en) * 1966-05-03 1968-05-07 Holophane Co Inc Reflector for street lighting luminaire
US3560729A (en) * 1969-02-18 1971-02-02 Milton Liberman Lighting fixture
JPS5369486A (en) * 1976-11-30 1978-06-20 Shiruban Aaru Shiemitsutsu And Illuminator
DE3014365A1 (en) * 1980-04-15 1981-10-22 Trilux-Lenze Gmbh + Co Kg, 5760 Arnsberg Light fitting for elongated lamp - has reflecting strap, carrying on its upper side tooth-shaped reflectors, parallel to lamp axis
JPS5761206A (en) * 1980-09-30 1982-04-13 Mitsubishi Electric Corp Illuminator
US4407011A (en) * 1980-12-08 1983-09-27 Donn Incorporated Integrated lighting systems for suspended ceilings or the like

Patent Citations (1)

* 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"

Also Published As

Publication number Publication date
CA1220460A (en) 1987-04-14
ATE30462T1 (en) 1987-11-15
ATA124683A (en) 1986-03-15
JPS60205903A (en) 1985-10-17
DE3374213D1 (en) 1987-12-03
EP0122972A1 (en) 1984-10-31
US4539628A (en) 1985-09-03
ZA841999B (en) 1985-06-26
AT381577B (en) 1986-11-10
JPH0418641B2 (en) 1992-03-27

Similar Documents

Publication Publication Date Title
EP0122972B1 (en) Non-dazzling light fixture with an elongated light source
DE69608044T2 (en) LAMP
DE19635906C2 (en) Luminaire with a reflector and shield arrangement
EP0309832A1 (en) Lighting fixture
DE4109492C2 (en) Luminaire louvre for louvre luminaires equipped with discharge lamps
DD231839A5 (en) LUMINOUS LUMINAIRE WITH AT LEAST ONE FLUORESCENT LAMPS AND RASTER LAMP PARALLEL LENS REFLECTORS
DE60037964T2 (en) LIGHT WITHOUT LAMELLES
DE19961491A1 (en) Light, especially interior light, has hollow light conductor formed by housing with reflective walls bounded at least partly by output coupling device with opposing reflective cover surface
EP1059484A1 (en) Luminaire with wide beam light intensity distribution
DE69933410T2 (en) lamp
EP1113219A2 (en) Lamp
DE10011304A1 (en) Luminaire with inhomogeneous light radiation
EP0372272B1 (en) Lighting fixture with a reflecting grid
DE4215968A1 (en) Light guiding structure for illuminating at least part of room with daylight - utilises daylight entering room through window assisted by elements located on wall or ceiling to reflect the light
EP1496308B1 (en) Interior Light with a refractive element
DE10011378A1 (en) Internal room lighting panel uses prism surface reflector to generate uniform high intensity indirect lighting output
DE3030080C2 (en) Elongated workplace lamp
DE3420414C2 (en) Translucent lamp cover for glare control of lamps with elongated lamps
DE69932591T2 (en) LAMP
EP1130310B1 (en) Hollow light conductor luminaire comprising a lamp in the cavity
AT374258B (en) GRID FOR FLUORESCENT LAMP LIGHTS
AT500187A1 (en) GRID LAMEL AND GRID FOR AN IMPROVED LIGHT SHADE AND ASSOCIATED LIGHT
EP0008006B1 (en) Indoor lighting fixture
EP1584860A2 (en) Luminaire
DE4230907C2 (en) Luminaire louvre for louvre luminaires

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19850423

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

REF Corresponds to:

Ref document number: 30462

Country of ref document: AT

Date of ref document: 19871115

Kind code of ref document: T

ITF It: translation for a ep patent filed

Owner name: ING. A. GIAMBROCONO & C. S.R.L.

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3374213

Country of ref document: DE

Date of ref document: 19871203

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19911220

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19911227

Year of fee payment: 9

Ref country code: LU

Payment date: 19911227

Year of fee payment: 9

Ref country code: CH

Payment date: 19911227

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19911230

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19911231

Year of fee payment: 9

Ref country code: FR

Payment date: 19911231

Year of fee payment: 9

Ref country code: BE

Payment date: 19911231

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19920215

Year of fee payment: 9

EPTA Lu: last paid annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19921220

Ref country code: GB

Effective date: 19921220

Ref country code: AT

Effective date: 19921220

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19921221

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19921231

Ref country code: CH

Effective date: 19921231

Ref country code: BE

Effective date: 19921231

BERE Be: lapsed

Owner name: BARTENBACH CHRISTIAN

Effective date: 19921231

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19930701

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19921220

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19930831

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19930901

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

EUG Se: european patent has lapsed

Ref document number: 83112800.4

Effective date: 19930709