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EP2102545B1 - Transparent plate with a surface structure for the largely glare-free emission of the light generated by a lamp - Google Patents

Transparent plate with a surface structure for the largely glare-free emission of the light generated by a lamp Download PDF

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Publication number
EP2102545B1
EP2102545B1 EP07818199A EP07818199A EP2102545B1 EP 2102545 B1 EP2102545 B1 EP 2102545B1 EP 07818199 A EP07818199 A EP 07818199A EP 07818199 A EP07818199 A EP 07818199A EP 2102545 B1 EP2102545 B1 EP 2102545B1
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EP
European Patent Office
Prior art keywords
surface structure
transparent plate
pyramids
grooves
lamp
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.)
Not-in-force
Application number
EP07818199A
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German (de)
French (fr)
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EP2102545A1 (en
Inventor
Markus Bohle
Siegfried Bickel
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.)
Zumtobel Lighting GmbH Austria
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Zumtobel Lighting GmbH Austria
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Publication of EP2102545A1 publication Critical patent/EP2102545A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/02—Refractors for light sources of prismatic shape

Definitions

  • a transparent plate having a surface structure formed for largely glare-free decoupling of the light generated by a luminaire, wherein the plate for forming the surface structure on at least one side two offset by 90 ° flocks of straight, parallel V-shaped grooves, wherein the configurable parameters, such as dimensions of the grooves, their distances within a family and the offset angles, are selected so that between the grooves remain exclusively protruding pyramids of the same height with a square base.
  • Transparent plates of the type described above have the disadvantage that the light output is not uniform in all directions. This is due to the square basic shape of the pyramids, which emit the light in four preferred directions. The latter has the consequence that the viewer of a provided with such a plate light depending on whether he sees the light of one of the preferred directions or from an intermediate position, a noticeable difference in brightness
  • a diffuser is known on which a pattern of prismatic lenses is imprinted.
  • the pattern comprises in each case 60 ° extending boundary lines.
  • the object of the invention is to improve the glare-reducing effect of such a panel in the sense that the viewer of a luminaire provided with such a panel experiences less pronounced brightness differences at different viewing positions.
  • the object is achieved by a transparent plate having the features of claim 1.
  • the core of the teaching of the invention is that not only two flocks of substantially V-shaped grooves are provided to realize the surface structure in the plate, but more than three crowds.
  • the transparent plate may have a positive or negative surface structure, ie the pyramids or truncated pyramids are at a positive training from the plate or surface level before or these are directed at a negative education of the plate plane inwards.
  • a "pyramid” is a polyhedron bounded by a base in the form of a polygon of any number of vertices and at least three triangles forming the side surfaces, the triangles being in one point ( Top of the pyramid).
  • the strictly geometric definition is not exclusive, but the advantageous lighting effects are also achievable if the side surfaces of the pyramids are flat, slightly curved or curved or faceted or formed in a similar manner.
  • a "truncated pyramid” is created by depositing a smaller pyramid similar to the original pyramid from a pyramid parallel to the base.
  • the teaching according to the invention makes it possible to arrange the pyramids or truncated pyramids within the surface structure such that at least those adjacent pyramids or truncated pyramids which have a common base edge have a different orientation. This in turn leads to an increase in the number of preferred directions with which the surface structure radiates the light emitted by the lamp with scattering effect. An increase in the number of preferred directions has the consequence that the desired Entblendungsrial is improved.
  • An embodiment of the invention may consist in that the transparent plate for forming the surface structure has four groups of grooves offset by an angle of 45 ° in each case.
  • the pyramids or truncated pyramids have a footprint forming an isosceles triangle.
  • Such a surface structure then already has eight preferred directions.
  • the invention further relates to a luminaire with a lamp and a reflector.
  • the lamp according to the invention should be characterized in that on the - viewed from the lamp - opposite side of the reflector, a transparent plate is applied with a surface structure, which is characterized by the features described above.
  • the arrangement should be such that the surface structure is located on the side of the plate facing away from the lamp.
  • Fig. 2 shows a transparent plate with a surface structure which is incorporated in a lamp 11 of known construction in order to couple the light generated by the lamp as glare-free.
  • the luminaire 11 has a fluorescent lamp 12 and a reflector 13 surrounding it.
  • a transparent plate is arranged with an outwardly or in an alternative embodiment inwardly directed surface structure.
  • the surface structure of the transparent plate 1 causes both directly incident beams 14, 15 as well as to the reflector 13 reflected beams 16a, 16b are scattered down so that on both sides of the lamp 11 largely shaded defibrillation areas 17, 18 arise.
  • Even very flat incident light rays such as the reflected light beam 16b can not - as indicated by the fictitious beam 16c - fall into the deblading region 18, but are scattered downwards, as indicated by the arrow bunch 16d.
  • the known surface structure is from the FIGS. 2 and 3 seen.
  • the transparent plate 1 has for this purpose two sets of parallel V-shaped grooves 2, 3 offset by 90 °, between which pyramids remain, of which only four are shown and two of which are designated by the reference numerals 5, 6.
  • the arrows provided on the pyramids indicate that the radiation of the light from the prisms takes place in four preferred directions.
  • a radiation of light is also in lying between the preferred directions directions, but with different light intensity. This difference is undesirable and is reduced in the below-described embodiments of the transparent plates according to the invention.
  • the in the 4 and 5 shown variant of a transparent plate 21 has to realize the surface structure three offset by 60 ° flocks of parallel substantially V-shaped grooves 22, 23 and 24.
  • the dimensions or the shape of the grooves and their distances within a crowd are such that remain between the grooves only pyramids of the same height.
  • the V-shaped grooves are formed by side surfaces of the pyramids, which may be slightly curved or otherwise configured in planar fashion or in other embodiments such that the side surfaces of different adjacent pyramids approximate the V-shape.
  • the pyramids have a base in the form of an equilateral triangle. For the sake of simplicity, only six pyramids have been shaded, of which only two are identified by reference numerals 25 and 26.
  • the pyramids having a common edge of the base area each have a different orientation.
  • the pyramids emit the light irradiated into the transparent plate 21 in six different preferred directions.
  • the preferred directions are indicated by arrows emanating from the pyramids.
  • the greater number of preferred directions leads to a reduction of brightness differences at different viewing angles of the transparent plate 21 with this surface structure.
  • the in the 6 and 7 illustrated variant of a transparent plate 31 according to the invention has to implement the surface structure four mutually offset by 45 ° flocks of parallel substantially V-shaped grooves 32, 33, 34, 35. Between the grooves remain pyramids of the same height. For the sake of simplicity, only eight are in the middle of the transparent plate 31 here shaded, where only four of these pyramids are denoted by reference numerals 36, 37, 38 and 39. It should be indicated by the arrows emanating from the pyramids that in this case the light irradiated into the transparent plate 31 is emitted in eight different preferred directions. In this way, an even further glare is guaranteed to be understood in the sense that differences in brightness from different viewing angles are even further reduced.
  • Transparent plates with surface structure in the Fig. 4 to 7 The type shown can be prepared by known per se manufacturing process by injection molding by means of a correspondingly shaped mold or by hot stamping by means of a stamp or by means of a roll mold for use in a continuous process.
  • the pyramids of the surface structure are small and usually have dimensions that are less than 1mm.
  • the prism structure is therefore also called a micro-surface structure.
  • the transparent plate have a surface structure formed by pyramids.
  • the spacings of the grooves within a coulter during milling of the tool plate 43 must be made larger, and indeed so large, that flat spacing regions remain between the milled-in grooves.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention relates to a transparent plate with a surface structure (21) for the largely glare-free emission of the light generated by a lamp, wherein the plate (21), in order to form the surface structure, has on at least one side more than two families offset by particular angles of straight, parallel running essentially V-shaped grooves (22-24). The configurable parameters in the arrangement, such as the dimensions of the grooves (22-24), the spacing thereof within a family, and the offset angles are chosen in such a way that between the grooves (22-24) only projecting pyramids or pyramid frustums (25, 26) remain, which preferably have the same height.

Description

Bekannt ist eine transparente Platte mit einer zum weitgehend blendfreien Auskoppeln des von einer Leuchte erzeugten Lichts ausgebildeten Oberflächenstruktur, wobei die Platte zur Bildung der Oberflächenstruktur an mindestens einer Seite zwei um 90° versetzte Scharen von geraden, parallel verlaufenden V-förmigen Nuten aufweist, wobei die konfigurierbaren Parameter, wie Abmessungen der Nuten, ihre Abstände innerhalb einer Schar und die Versatzwinkel, so gewählt sind, dass zwischen den Nuten ausschließlich vorstehende Pyramiden gleicher Höhe mit quadratischer Grundfläche verbleiben.A transparent plate is known having a surface structure formed for largely glare-free decoupling of the light generated by a luminaire, wherein the plate for forming the surface structure on at least one side two offset by 90 ° flocks of straight, parallel V-shaped grooves, wherein the configurable parameters, such as dimensions of the grooves, their distances within a family and the offset angles, are selected so that between the grooves remain exclusively protruding pyramids of the same height with a square base.

Transparente Platten der vorstehend beschriebenen Art haben den Nachteil, dass die Lichtabgabe nicht in alle Richtungen gleichmäßig erfolgt. Dies liegt an der quadratischen Grundform der Pyramiden, welche das Licht in vier Vorzugsrichtungen abgeben. Letzteres hat zur Folge, dass der Betrachter einer mit einer solchen Platte versehenen Leuchte in Abhängigkeit davon, ob er die Leuchte von einer der Vorzugsrichtungen aus betrachtet oder von einer dazwischen liegenden Position, einen wahrnehmbaren Helligkeitsunterschied feststelltTransparent plates of the type described above have the disadvantage that the light output is not uniform in all directions. This is due to the square basic shape of the pyramids, which emit the light in four preferred directions. The latter has the consequence that the viewer of a provided with such a plate light depending on whether he sees the light of one of the preferred directions or from an intermediate position, a noticeable difference in brightness

Aus der DE 2 357 060 A1 ist eine Streuscheibe bekannt, auf der ein Muster von prismatischen Linsen eingeprägt ist. Das Muster umfasst jeweils 60° zueinander verlaufende Begrenzungslinien.From the DE 2 357 060 A1 For example, a diffuser is known on which a pattern of prismatic lenses is imprinted. The pattern comprises in each case 60 ° extending boundary lines.

Aus der DE 25 20 429 A1 ist eine lichtdurchlässige Abdeckung für Leuchten bekannt, die vier Scharen von Nuten aufweist, zwischen denen Pyramiden gebildet sind.From the DE 25 20 429 A1 is a translucent cover for lights known which has four sets of grooves between which pyramids are formed.

Der Erfindung liegt die Aufgabe zugrunde, die Entblendungswirkung einer solchen Platte in dem Sinne zu verbessern, dass der Betrachter einer mit einer derartigen Platte versehenen Leuchte bei unterschiedlichen Betrachtungspositionen weniger starke Helligkeitsunterschiede empfindet.The object of the invention is to improve the glare-reducing effect of such a panel in the sense that the viewer of a luminaire provided with such a panel experiences less pronounced brightness differences at different viewing positions.

Die Aufgabe ist erfindungsgemäß gelöst durch eine transparente Platte mit den Merkmalen des Anspruchs 1. Kern der erfindungsgemäßen Lehre ist, dass zur Realisierung der Oberflächenstruktur in der Platte nicht nur zwei Scharen von im wesentlichen V-förmigen Nuten vorzusehen sind, sondern mehr als drei Scharen.The object is achieved by a transparent plate having the features of claim 1. The core of the teaching of the invention is that not only two flocks of substantially V-shaped grooves are provided to realize the surface structure in the plate, but more than three crowds.

Dabei ist darauf zu achten, dass die konfigurierbaren Parameter, wie Abmessungen der Nuten, ihre Abstände innerhalb einer Schar und die Versatzwinkel der Nuten-Scharen so gewählt sind, dass zwischen den Nuten ausschließlich Pyramiden oder Pyramidenstümpfe verbleiben, deren Grundfläche jedoch nicht-quadratisch ist und die gleiche Höhe haben. Die transparente Platte kann eine positive oder negative Oberflächenstruktur aufweisen, d.h. die Pyramiden oder Pyramidenstümpfe stehen bei einer positiven Ausbildung aus der Platten- bzw. Oberflächenebene vor oder diese sind bei einer negativen Ausbildung von der Plattenebene nach innen gerichtet.Care must be taken to ensure that the configurable parameters, such as dimensions of the grooves, their distances within a family and the offset angle of the groove coulters are chosen so that remain between the grooves exclusively pyramids or truncated pyramids, whose base is non-square and have the same height. The transparent plate may have a positive or negative surface structure, ie the pyramids or truncated pyramids are at a positive training from the plate or surface level before or these are directed at a negative education of the plate plane inwards.

Zur geometrischen Definition einer Pyramide und eines Pyramidenstumpfs sei an dieser Stelle folgendes festgehalten: Eine "Pyramide" ist ein Polyeder, der von einer Grundfläche in Form eines Polygons beliebiger Eckenzahl und mindestens drei die Seitenflächen bildenden Dreiecken begrenzt ist, wobei die Dreiecke in einem Punkt (Spitze der Pyramide) zusammentreffen. Im Rahmen dieser Erfindung ist jedoch nicht ausschließlich die streng geometrische Definition maßgebend, sondern die vorteilhaften lichttechnischen Effekte sind auch dann erzielbar, wenn die Seitenflächen der Pyramiden eben, leicht gewölbt oder geschwungen oder facettiert oder in ähnlicher Weise ausgebildet sind.For the geometric definition of a pyramid and a truncated pyramid, the following is stated: A "pyramid" is a polyhedron bounded by a base in the form of a polygon of any number of vertices and at least three triangles forming the side surfaces, the triangles being in one point ( Top of the pyramid). In the context of this invention, however, the strictly geometric definition is not exclusive, but the advantageous lighting effects are also achievable if the side surfaces of the pyramids are flat, slightly curved or curved or faceted or formed in a similar manner.

Ein "Pyramidenstumpf" entsteht dadurch, dass man von einer Pyramide parallel zur Grundfläche eine kleinere, zur ursprünglichen Pyramide ähnliche Pyramide abscheidet.A "truncated pyramid" is created by depositing a smaller pyramid similar to the original pyramid from a pyramid parallel to the base.

Die erfindungsgemäße Lehre erlaubt es, die Pyramiden oder Pyramidenstümpfe innerhalb der Oberflächenstruktur so anzuordnen, dass zumindest diejenigen benachbarten Pyramiden oder Pyramidenstümpfe, die eine gemeinsame Grundflächen-Kante haben, eine voneinander abweichende Ausrichtung aufweisen. Das wiederum führt zu einer Erhöhung der Zahl der Vorzugsrichtungen, mit der die Oberflächenstruktur das von der Leuchte abgegebene Licht mit Streuwirkung abstrahlt. Eine Erhöhung der Zahl der Vorzugsrichtungen hat zur Folge, dass die angestrebte Entblendungswirkung verbessert wird.The teaching according to the invention makes it possible to arrange the pyramids or truncated pyramids within the surface structure such that at least those adjacent pyramids or truncated pyramids which have a common base edge have a different orientation. This in turn leads to an increase in the number of preferred directions with which the surface structure radiates the light emitted by the lamp with scattering effect. An increase in the number of preferred directions has the consequence that the desired Entblendungswirkung is improved.

Eine Ausgestaltung der Erfindung kann darin bestehen, dass die transparente Platte zur Bildung der Oberflächenstruktur vier um jeweils einen Winkel von 45° versetzte Scharen von Nuten aufweist. Hier haben die Pyramiden oder Pyramidenstümpfe eine ein gleichschenkliges Dreieck bildende Grundfläche. Eine solche Oberflächenstruktur hat dann bereits acht Vorzugsrichtungen.An embodiment of the invention may consist in that the transparent plate for forming the surface structure has four groups of grooves offset by an angle of 45 ° in each case. Here the pyramids or truncated pyramids have a footprint forming an isosceles triangle. Such a surface structure then already has eight preferred directions.

Die Erfindung betrifft ferner eine Leuchte mit einer Lampe und einem Reflektor. Die erfindungsgemäße Leuchte soll dadurch gekennzeichnet sein, dass auf der - von der Lampe aus gesehen - gegenüberliegende Seite des Reflektors eine transparente Platte mit einer Oberflächenstruktur aufgebracht wird, die sich durch die vorstehend beschriebenen Merkmale auszeichnet. Die Anordnung soll dabei so erfolgen, dass sich die Oberflächenstruktur auf der der Lampe abgewandten Seite der Platte befindet.The invention further relates to a luminaire with a lamp and a reflector. The lamp according to the invention should be characterized in that on the - viewed from the lamp - opposite side of the reflector, a transparent plate is applied with a surface structure, which is characterized by the features described above. The arrangement should be such that the surface structure is located on the side of the plate facing away from the lamp.

Ausführungsbeispiele der Erfindung werden nachfolgend anhand der Zeichnungen beschrieben. Es zeigen:

Fig. 1
eine bekannte Leuchte mit einer transparenten Platte mit einer Pyramiden mit quadratischer Grundfläche aufweisenden Oberflächenstruktur;
Fig. 2
eine Ansicht II gegen die in Fig. 1 gezeigte bekannte transparente Platte;
Fig. 3
einen Teilschnitt III-III durch die in Fig. 2 gezeigte bekannte Platte;
Fig. 4
eine Ansicht wie die Ansicht II in Fig. 1 auf eine transparente Platte mit einer von Pyramiden gebildeten Oberflächenstruktur gemäß einer nicht erfindungsgemäßen Ausführungsform,
Fig. 5
einen Teilschnitt V-V durch die in Fig. 4 gezeigte transparente Platte;
Fig. 6
eine Ansicht wie die Ansicht II in Fig. 1 auf eine transparente Platte mit einer von Pyramiden gebildeten Oberflächenstruktur gemäß einer Ausführungsform der Erfindung;
Fig. 7
einen Teilschnitt VII-VII durch die in Fig. 6 gezeigte transparente Platte.
Embodiments of the invention will be described below with reference to the drawings. Show it:
Fig. 1
a known luminaire with a transparent plate having a pyramid having a square base surface structure;
Fig. 2
a view II against the in Fig. 1 shown known transparent plate;
Fig. 3
a partial section III-III through the in Fig. 2 shown known plate;
Fig. 4
a view like the view II in Fig. 1 on a transparent plate having a pyramid-shaped surface structure according to a non-inventive embodiment,
Fig. 5
a partial section VV through the in Fig. 4 shown transparent plate;
Fig. 6
a view like the view II in Fig. 1 on a transparent plate having a pyramid-shaped surface structure according to an embodiment of the invention;
Fig. 7
a partial section VII-VII by the in Fig. 6 shown transparent plate.

Fig. 2 zeigt eine transparente Platte mit einer Oberflächenstruktur, die in einer Leuchte 11 bekannter Konstruktion eingebaut ist, um das von der Leuchte erzeugte Licht möglichst blendfrei auszukoppeln. Die Leuchte 11 weist eine Leuchtstofflampe 12 und einen diese umgebenden Reflektor 13 auf. Auf der dem Reflektor gegenüberliegenden Seite der Leuchtstofflampe 12 ist eine transparente Platte mit einer nach außen oder in einer alternativen Ausführungsform nach innen gerichteten Oberflächenstruktur angeordnet. Die Oberflächenstruktur der transparenten Platte 1 bewirkt, dass sowohl direkt auftreffende Strahlen 14, 15 als auch an dem Reflektor 13 reflektierte Strahlen 16a, 16b so nach unten gestreut werden, dass zu beiden Seiten der Leuchte 11 weitgehend abgeschattete Entblendungsbereiche 17, 18 entstehen. Selbst sehr flach auftreffende Lichtstrahlen wie der reflektierte Lichtstrahl 16b können nicht - wie durch den fiktiven Strahl 16c angedeutet - in den Entblendungsbereich 18 fallen, sondern werden nach unten gestreut, wie dies durch das Pfeilbündel 16d angedeutet ist. Fig. 2 shows a transparent plate with a surface structure which is incorporated in a lamp 11 of known construction in order to couple the light generated by the lamp as glare-free. The luminaire 11 has a fluorescent lamp 12 and a reflector 13 surrounding it. On the opposite side of the reflector of the fluorescent lamp 12, a transparent plate is arranged with an outwardly or in an alternative embodiment inwardly directed surface structure. The surface structure of the transparent plate 1 causes both directly incident beams 14, 15 as well as to the reflector 13 reflected beams 16a, 16b are scattered down so that on both sides of the lamp 11 largely shaded defibrillation areas 17, 18 arise. Even very flat incident light rays such as the reflected light beam 16b can not - as indicated by the fictitious beam 16c - fall into the deblading region 18, but are scattered downwards, as indicated by the arrow bunch 16d.

Die bekannte Oberflächenstruktur ist aus den Fig. 2 und 3 ersichtlich. Die transparente Platte 1 weist dazu zwei um 90° versetzte Scharen von parallel verlaufenden V-förmigen Nuten 2, 3 auf, zwischen denen Pyramiden verbleiben, von denen nur vier gezeigt sind und zwei davon mit den Bezugsziffern 5, 6 bezeichnet sind. Durch die an den Pyramiden vorgesehenen Pfeile ist angedeutet, dass die Abstrahlung des Lichts von den Prismen in vier Vorzugsrichtungen erfolgt. Natürlich erfolgt eine Abstrahlung von Licht auch in zwischen den Vorzugsrichtungen liegenden Richtungen, allerdings mit anderer Lichtintensität. Dieser Unterschied ist unerwünscht und wird bei den nachfolgend beschriebenen erfindungsgemäßen Ausffihrungsformen der transparenten Platten vermindert.The known surface structure is from the FIGS. 2 and 3 seen. The transparent plate 1 has for this purpose two sets of parallel V-shaped grooves 2, 3 offset by 90 °, between which pyramids remain, of which only four are shown and two of which are designated by the reference numerals 5, 6. The arrows provided on the pyramids indicate that the radiation of the light from the prisms takes place in four preferred directions. Of course, a radiation of light is also in lying between the preferred directions directions, but with different light intensity. This difference is undesirable and is reduced in the below-described embodiments of the transparent plates according to the invention.

Die in den Fig. 4 und 5 gezeigte Variante einer transparenten Platte 21 weist zur Realisierung der Oberflächenstruktur drei um jeweils 60° versetzte Scharen von parallel verlaufenden im wesentlichen V-förmigen Nuten 22, 23 und 24 auf. Die Abmessungen bzw. die Form der Nuten sowie ihre Abstände innerhalb einer Schar sind so bemessen, dass zwischen den Nuten ausschließlich Pyramiden gleicher Höhe verbleiben. Die V-förmigen Nuten werden durch Seitenflächen der Pyramiden gebildet, wobei diese eben oder in anderen Ausführungsformen leicht gewölbt oder in ähnlicher Weise ausgestaltet sein können, so dass sich die Seitenflächen unterschiedlicher benachbarter Pyramiden der V-Form annähern. Die Pyramiden haben eine Grundfläche in Form eines gleichseitigen Dreiecks. Es sind der Einfachheit halber nur sechs Pyramiden mit Schattierungen versehen worden, von denen lediglich zwei mit Bezugsziffern 25 und 26 gekennzeichnet sind. Es ist aber erkennbar, dass die eine gemeinsame Kante der Grundfläche aufweisenden Pyramiden jeweils eine andere Ausrichtung haben. Auf diese Weise wird erreicht, dass die Pyramiden das in die transparente Platte 21 eingestrahlte Licht in sechs verschiedene Vorzugsrichtungen abstrahlen. Die Vorzugsrichtungen sind durch von den Pyramiden ausgehende Pfeile angedeutet. Die größere Zahl der Vorzugsrichtungen führt zu einer Verminderung von Helligkeitsunterschieden bei unterschiedlichen Betrachtungswinkeln der transparenten Platte 21 mit dieser Oberflächenstruktur.The in the 4 and 5 shown variant of a transparent plate 21 has to realize the surface structure three offset by 60 ° flocks of parallel substantially V-shaped grooves 22, 23 and 24. The dimensions or the shape of the grooves and their distances within a crowd are such that remain between the grooves only pyramids of the same height. The V-shaped grooves are formed by side surfaces of the pyramids, which may be slightly curved or otherwise configured in planar fashion or in other embodiments such that the side surfaces of different adjacent pyramids approximate the V-shape. The pyramids have a base in the form of an equilateral triangle. For the sake of simplicity, only six pyramids have been shaded, of which only two are identified by reference numerals 25 and 26. However, it can be seen that the pyramids having a common edge of the base area each have a different orientation. In this way, it is achieved that the pyramids emit the light irradiated into the transparent plate 21 in six different preferred directions. The preferred directions are indicated by arrows emanating from the pyramids. The greater number of preferred directions leads to a reduction of brightness differences at different viewing angles of the transparent plate 21 with this surface structure.

Die in den Fig. 6 und 7 dargestellte Variante einer erfindungsgemäßen transparenten Platte 31 weist zur Realisierung der Oberflächenstruktur vier um jeweils 45° versetzte Scharen von parallel verlaufenden im wesentlichen V-förmigen Nuten 32, 33, 34, 35 auf. Zwischen den Nuten verbleiben auch hier Pyramiden gleicher Höhe. Der Einfachheit halber sind auch hier nur acht in der Mitte der transparenten Platte 31 liegende Pyramiden mit Schattierungen versehen worden, wobei nur vier dieser Pyramiden mit Bezugsziffer 36, 37, 38 und 39 gekennzeichnet sind. Durch die von den Pyramiden ausgehenden Pfeile soll angedeutet werden, dass in diesem Fall das in die transparente Platte 31 eingestrahlte Licht in acht unterschiedliche Vorzugsrichtungen abgestrahlt wird. Auf diese Weise ist eine noch weitergehende Entblendung gewährleistet, zu verstehen in dem Sinne, dass Helligkeitsunterschiede aus verschiedenen Hetrachtungswinkeln noch weiter reduziert sind.The in the 6 and 7 illustrated variant of a transparent plate 31 according to the invention has to implement the surface structure four mutually offset by 45 ° flocks of parallel substantially V-shaped grooves 32, 33, 34, 35. Between the grooves remain pyramids of the same height. For the sake of simplicity, only eight are in the middle of the transparent plate 31 here shaded, where only four of these pyramids are denoted by reference numerals 36, 37, 38 and 39. It should be indicated by the arrows emanating from the pyramids that in this case the light irradiated into the transparent plate 31 is emitted in eight different preferred directions. In this way, an even further glare is guaranteed to be understood in the sense that differences in brightness from different viewing angles are even further reduced.

Transparente Platten mit Oberflächenstruktur der in den Fig. 4 bis 7 gezeigten Art können mit an sich bekannten Herstellverfahren durch Spritzgießen mittels einer entsprechend ausgebildeten Gießform oder durch Heißpräge mittels eines Stempels oder mittels einer Rollform zur Nutzung in einem Endlosverfahren hergestellt werden. Die Pyramiden der Oberflächenstruktur sind klein und haben in der Regel Abmessungen, die geringer als 1mm sind. Die Prismenstruktur wird daher auch als Mikro-Oberflächenstruktur bezeichnet.Transparent plates with surface structure in the Fig. 4 to 7 The type shown can be prepared by known per se manufacturing process by injection molding by means of a correspondingly shaped mold or by hot stamping by means of a stamp or by means of a roll mold for use in a continuous process. The pyramids of the surface structure are small and usually have dimensions that are less than 1mm. The prism structure is therefore also called a micro-surface structure.

Die in Verbindung mit den Figuren 1 - 6 beschriebenen Ausführungsformen für die transparente Platte haben eine von Pyramiden gebildete Oberflächenstruktur. Um eine von Pyramidenstümpfen gebildete Oberflächenstruktur zu erzeugen müssen die Abstände der Nuten innerhalb einer Schar beim Fräsen der Werkzeugplatte 43 größer gewählt werden, und zwar so groß, dass zwischen den eingefrästen Nuten ebene Abstandsbereiche verbleiben.The in conjunction with the Figures 1-6 described embodiments for the transparent plate have a surface structure formed by pyramids. In order to produce a surface structure formed by truncated pyramids, the spacings of the grooves within a coulter during milling of the tool plate 43 must be made larger, and indeed so large, that flat spacing regions remain between the milled-in grooves.

Claims (4)

  1. A transparent plate (21, 31) having a surface structure for largely glare-free emission of the light generated by a luminaire (11), wherein the plate (21, 31) has for the formation of the surface structure on at least the upper side or the lower side more than three families, offset in each case by certain angles, of straight V-shaped grooves (22-24, 32-35) extending in parallel, and wherein the parameters that can be configured, such as the dimensions of the grooves (22-24, 32-35), their spacing within a family and the offset angles, are selected in such a way that only protruding pyramids (25, 26; 36-39) or pyramid frustums remain between the grooves (22-24, 32-35),
    characterised in that
    the pyramids or pyramid frustums (25, 26; 36-39) have the same height.
  2. A transparent plate (21, 31) according to claim 1,
    characterised in that
    the parameters that can be configured are further selected so that at least those adjacent pyramids or pyramid frustums (25, 26; 36-39) that have a common base-area edge have a differing alignment from one another.
  3. A transparent plate (31) according to claim 1 or 2,
    characterised in that
    in order to form the surface structure it has four families of grooves (32-35) that are each offset by an angle of 45°.
  4. A luminaire (11) having a lamp (12) and a reflector (13),
    characterised in that
    a transparent plate (21, 31) having a surface structure according to one of claims 1 to 3 is provided on the side of the reflector (13) that is opposite - viewed from the lamp (12) - in such a way that the surface structure is located on the side of the plate (21; 31) that is remote from the lamp (12).
EP07818199A 2006-11-17 2007-09-17 Transparent plate with a surface structure for the largely glare-free emission of the light generated by a lamp Not-in-force EP2102545B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006054379A DE102006054379A1 (en) 2006-11-17 2006-11-17 Transparent plate with a surface structure for largely glare-free decoupling of the light generated by a luminaire
PCT/EP2007/008093 WO2008058585A1 (en) 2006-11-17 2007-09-17 Transparent plate with a surface structure for the largely glare-free emission of the light generated by a lamp

Publications (2)

Publication Number Publication Date
EP2102545A1 EP2102545A1 (en) 2009-09-23
EP2102545B1 true EP2102545B1 (en) 2010-11-17

Family

ID=38740228

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07818199A Not-in-force EP2102545B1 (en) 2006-11-17 2007-09-17 Transparent plate with a surface structure for the largely glare-free emission of the light generated by a lamp

Country Status (4)

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EP (1) EP2102545B1 (en)
AT (1) ATE488730T1 (en)
DE (2) DE102006054379A1 (en)
WO (1) WO2008058585A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202010002744U1 (en) 2010-02-24 2010-07-08 Bwf Kunststoffe Gmbh & Co. Kg Device for glare-reduced coupling of light
CN103443531B (en) 2011-03-31 2017-12-08 飞利浦灯具控股公司 For the solid luminescent band inside or on the Panel supporting elements of modular panels system
WO2012168839A1 (en) 2011-06-09 2012-12-13 Koninklijke Philips Electronics N.V. Lighting strip
US9157582B2 (en) 2011-06-09 2015-10-13 Koninklijke Philips N.V. Lighting strip
DE102011103981A1 (en) * 2011-06-10 2012-12-13 Siteco Beleuchtungstechnik Gmbh prism plate
KR20130047334A (en) * 2011-10-31 2013-05-08 엘지이노텍 주식회사 Lighting member and lighting device comprising the same
ITBS20120051A1 (en) * 2012-04-04 2013-10-05 Targetti Sankey Spa LIGHTING APPLIANCE

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3001062A (en) * 1955-09-15 1961-09-19 Westinghouse Electric Corp Light refractor
DE1201787B (en) * 1958-07-30 1965-09-30 Corning Glass Works Translucent plate
US3829680A (en) * 1972-11-24 1974-08-13 Carroll J & Sons Lighting panel
DE2520429C3 (en) * 1975-05-07 1978-05-11 Siemens Ag, 1000 Berlin Und 8000 Muenchen Translucent cover for lights
US4064433A (en) * 1976-06-30 1977-12-20 K-S-H, Inc. Prismatic lighting panel

Also Published As

Publication number Publication date
DE102006054379A1 (en) 2008-05-21
DE502007005711D1 (en) 2010-12-30
ATE488730T1 (en) 2010-12-15
EP2102545A1 (en) 2009-09-23
WO2008058585A1 (en) 2008-05-22

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