WO2011124294A1 - Dispositif pour le découplage réduit au niveau de l'éblouissement de la lumière - Google Patents

Dispositif pour le découplage réduit au niveau de l'éblouissement de la lumière Download PDF

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Publication number
WO2011124294A1
WO2011124294A1 PCT/EP2011/000795 EP2011000795W WO2011124294A1 WO 2011124294 A1 WO2011124294 A1 WO 2011124294A1 EP 2011000795 W EP2011000795 W EP 2011000795W WO 2011124294 A1 WO2011124294 A1 WO 2011124294A1
Authority
WO
WIPO (PCT)
Prior art keywords
structural elements
plate
pyramidal
microstructure
triangles
Prior art date
Application number
PCT/EP2011/000795
Other languages
German (de)
English (en)
Inventor
Thomas Berchthold
Original Assignee
Bwf Kunststoffe Gmbh & Co. Kg
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 Bwf Kunststoffe Gmbh & Co. Kg filed Critical Bwf Kunststoffe Gmbh & Co. Kg
Publication of WO2011124294A1 publication Critical patent/WO2011124294A1/fr

Links

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
    • F21V5/00—Refractors for light sources
    • F21V5/002—Refractors for light sources using microoptical elements for redirecting or diffusing light
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
    • G02B5/0231—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures the surface having microprismatic or micropyramidal shape

Definitions

  • the present invention is an apparatus for glare-reduced coupling of light from a lamp.
  • Transparent provided with a structured surface
  • usually plate-shaped covers have long been used to direct the light emerging from a lamp targeted and thus improve the anti-glare properties of the lamp.
  • reflection and refraction of the light are used on the surfaces of the cover plate in order to influence the beam path of the light in the desired manner.
  • the lighting of workplaces has special requirements. These are specified in the European standard DIN EN 12464.
  • the standard lists some criteria by which lighting quality can be assessed. Particularly important criteria are a harmonious luminance distribution, a sufficient illuminance, good uniformity and in particular the limitation of direct and reflected glare.
  • Direct glare is the direct glare of an observer from light emitted by a light placed in the field of view of the observer. Reflected glare is caused by light, which is reflected by reflective surfaces. The light radiating the light does not necessarily have to be within the field of view of the observer.
  • a limitation of reflected glare is particularly important in the field of VDU workstations of great importance, since screens, depending on their screen quality, contribute greatly to the reflected glare.
  • the known structural plates for glare-proofing of luminaires differ from each other mostly by the shape of the structural elements used for structuring the surface. The shape and arrangement of the structural elements not only influence the debubbling properties of the respective plate,
  • a translucent cover for luminaires which has on its outside two intersecting with acute angle flocks of equidistant, a plurality of major grooves forming main grooves, which in turn are intersected by further equidistant side grooves, wherein between the main and side grooves are pyramid-shaped and / or prism-shaped light-guiding bodies.
  • DE 201 07 425 U1 discloses a device for glaring a light-emitting luminous means on the basis of refraction and / or total reflection of the light with a plate of predetermined thickness that extends in a flat manner.
  • On at least one of the two plate surfaces are arranged for structuring prisms, in particular three-sided prisms with mutually parallel and lying in a plane plate axes.
  • the prisms adjoin each other without gaps, each with a side surface lying in the plane of the plate.
  • From DE 1 03 02 564 A1 discloses a device for glare of a light source in the form of a flat extending plate of predetermined thickness of transparent plastic or transparent glass is known in which at least one of the two surfaces of the plate with an optically active structure and at least one surface is provided with a semitransparent mirroring.
  • DE 10 2006 01 1 296 A1 discloses a device for the light direction of any light source in the form of a flatly extending plate of predetermined thickness transparent plastic or transparent glass, in which at least one of the two surfaces of the plate is provided with an optically active microstructure of a plurality of microelements, which are tilted in their symmetry axis relative to the surface normal of the flatly extended plate.
  • DE 10 2006 009 325 A1 discloses a device for glareflecting any illuminant in the form of a flatly extending transparent plastic or transparent glass pane, in which at least one of the two surfaces of the plate is provided with an optically effective microstructure comprising a plurality of microelements the light in a preferred, here vertical emission direction emerge.
  • WO 2008/058585 A1 discloses a transparent plate with a surface structure for substantially glare-free decoupling of the light generated by a luminaire, which at least one side more than two flocks of straight, parallel extending in each case by at certain angles to form the surface structure substantially Has V-shaped grooves.
  • the configurable parameters such as the dimensions of the grooves, their distances within a family and the offset angle are chosen so that remain between the grooves exclusively protruding pyramids or truncated pyramids, which preferably have the same height.
  • the known microstructure plates have numerous disadvantages. For example, a structuring of the surface by means of V-shaped grooves brings about linear sharp-edged depressions in the plate surface. These sharp-edged depressions can be caused by notch effect especially during transport, installation and installation of the plates mechanical stress peaks that, starting from the groove bottom, lead to the destruction of the plate. It is also disadvantageous if the structural elements used have a low structural diversity. This leads to uneven light output, mainly in a few preferential obligations. An observer of a luminaire provided with such a plate determines a clear difference in brightness depending on whether he is looking at the luminaire in one of the preferred directions or in an intermediate direction.
  • the object of the present invention is to provide a device for glare-reduced coupling out of light from a luminaire, the optical and mechanical properties of which are improved compared to the devices known from the prior art for blinding lights.
  • the device for glare-reduced coupling out of light from a luminaire has at least one structured surface, on which at least one group of pyramidal structural elements is arranged, which comprises a structural element whose base surface is formed in the form of a hexagon and two structural elements whose base surfaces are in shape are formed by triangles, wherein the base surfaces are formed and arranged such that each side of the triangles adjacent to each side of the hexagon and the adjacent sides have substantially the same side length.
  • the hexagon are preferably formed as a regular hexagon and triangles preferably as equilateral triangles.
  • the device according to the invention preferably has a multiplicity of groups of pyramid-shaped structural elements which are similar to one another and are arranged over the entire area.
  • the device for glare-reduced decoupling of light from a luminaire can be designed according to the invention as a microstructure plate.
  • the pyramid-shaped structural elements are preferably designed as pyramid-shaped depressions in the plate material.
  • the invention is also directed to a luminaire comprising a microstructure plate according to the invention.
  • the microstructure plate is preferably arranged such that the structured surface faces away from the illuminant.
  • the inventive device has both pyramids with hexagonal base and pyramids with triangular base. It therefore has two different structural elements.
  • the bases of these structural elements are chosen so that they can be arranged area-wide, whereby the available area on the microstructure plate is optimally utilized.
  • the bases of the pyramidal structural elements can have different side lengths. Preferably, however, the bases of all pyramid-shaped structural elements have substantially the same side length.
  • the pyramidal structural elements are formed so that their base surfaces lie substantially in one plane and their side surfaces have substantially the same angle of inclination relative to this plane.
  • the value of this angle is between 33 ° and 36 °, preferably between 34 ° and 36 °, in particular in the vicinity of 35 °.
  • the structural diversity of the structural elements can be increased even more by choosing different angles of inclination for the side surfaces of different pyramids. However, this complicates the manufacture of a device according to the invention.
  • the pyramidal structural elements may be formed as pyramids, for example but also as truncated pyramids.
  • a truncated pyramid is understood to mean a structure that results from the fact that the upper tip is removed from a pyramid.
  • the resulting boundary surface of the truncated pyramid does not necessarily have to be flat. However, it may be advantageous if it is planar and in particular parallel to the base of the pyramid.
  • the side surfaces of the pyramidal structural elements are planar. According to the invention, however, the side surfaces of the pyramid-shaped structural elements may also be arched, curved, or otherwise curved.
  • a preferred embodiment of the present invention can be dispensed with arranging pyramidal structural elements with triangular base on the microstructure plate.
  • the microstructure plate then has only pyramid-shaped structural elements with a hexagonal base. If the pyramid-shaped structural elements with a hexagonal base face are arranged on the microstructure plate covering the entire surface, this results in a honeycomb structure.
  • the formation of the pyramid-shaped structural elements as pyramidal depressions in the plate material of a microstructure plate according to the invention has the advantage that continuous sharp-edged grooves in the plate material are thereby avoided.
  • Such a microstructure plate according to the invention is accordingly more tolerant of mechanical stress peaks and can consequently be exposed to stronger mechanical loads.
  • the mechanical strength of a microstructure plate according to the invention can be further increased by providing web-like connection regions between the base surfaces of the pyramid-shaped structural elements.
  • the web-like connection regions lead, in particular in the case in which the structural elements are formed as depressions in the plate material, to the fact that the surface of the microstructure plate has no sharp-edged ridges. This makes the microstructure plate more robust in terms of damage to its structured surface.
  • the width of the web-like connection regions is according to the invention about 0.1 mm.
  • the edges of the microstructure plate according to the invention preferably have edge radii of at most 0.05 mm.
  • the device according to the invention can be produced by means of known production methods.
  • the device according to the invention can be produced by injection molding, by pressing or injection-compression molding or by an embossing process, in particular by using an embossing roll. If an embossing roller is used to produce a microstructure plate according to the invention, microstructure plates of any length can be produced by means of an embossing calender in an extrusion process.
  • thermoplastics As a material for the production of the device according to the invention, a variety of conventional thermoplastics is suitable. According to the invention, the material can be largely transparent, but it can also be colored. For the Production of the device according to the invention particularly preferred materials are polymethyl methacrylate (PMMA) and polycarbonate (PC).
  • PMMA polymethyl methacrylate
  • PC polycarbonate
  • FIG. 1 a, 1 b, 1 c three groups of pyramidal structural elements according to the invention
  • 2 is a sectional view of a preferred embodiment of the microstructure plate according to the invention, in which the pyramidal structural elements are formed as depressions in the plate material;
  • FIG. 3 is a perspective view of the preferred embodiment of FIG. 2; FIG.
  • FIG. 4 shows a detailed view of the preferred embodiment according to FIG. 2;
  • FIG. 5 shows a detailed view of a further preferred embodiment of the present invention, in which web-like connecting regions are provided between the base surfaces of the pyramid-shaped structural elements.
  • FIGS. 1 a, 1 b and 1 c show three groups G ' "1 " according to the invention of pyramid-shaped structural elements.
  • Each of the groups G ' ⁇ '" comprises a pyramid-shaped structural element A with a hexagonal base surface and two triangular base pyramidal structural elements B.
  • the base surfaces are formed as regular hexagons or triangles
  • the pyramidal structural element A with hexagonal base surface has six triangular lateral faces 11 VI B.
  • the pyramid-shaped structural elements with a triangular base each have three triangular lateral faces 2 '' '". two of these side surfaces 2 1" "1 boundaries in the edges K 1 is" 1 "to each other.
  • the first group G 1 (FIG.
  • the pyramidal structural elements B with a triangular base are arranged on opposite sides of the base of the pyramidal structural element A with a hexagonal base.
  • the pyramid-shaped structural elements B with a triangular base are arranged on adjoining sides of the base of the hexagonal base pyramidal structural element A.
  • the third group G" 1 (FIG the sides of the hexagonal base on which the structural elements B are arranged with a triangular base surface, exactly one side, on which no structural element is arranged.
  • FIGS. 1a and 1b The c in Figures 1 a, 1 b and 1 G groups represented according to the invention '' '' of the pyramid-shaped structural elements can be arranged so as to cover a surface without gaps.
  • a horizontal row of surface-covering structural elements can first be formed by arranging copies of the group laterally next to the group shown at the appropriate distance Group G " 1 must be additionally rotated every other copy by 180 °. If one places subsequently copies of this horizontal row at a suitable distance above or below the row, the result is a comprehensive arrangement of pyramid-shaped structural elements.
  • FIG. 2 shows a sectional view of a preferred embodiment of the microstructure plate M according to the invention.
  • the pyramidal structural elements are formed as depressions in the plate material.
  • a pyramid-shaped structural element A with a hexagonal base is arranged centrally.
  • Left and right of each two pyramidal structural elements B are arranged with a triangular base.
  • the side surfaces 1 ' "VI and 2 1" 1 "have an inclination angle with respect to the plane in which the microstructure plate M extends.
  • the value of the inclination angle ⁇ is 35 °.
  • the two side surfaces 2' " '"formed adjacent to each other Edges K 1 "1 " have an inclination angle ⁇ with respect to the plane
  • the value of the angle ⁇ is approximately 19.3 °
  • the pyramidal structural element A with hexagonal base have a width b
  • the pyramidal structural elements B with a triangular base has a width b 2.
  • the pyramid-shaped structural element A with a hexagonal base has a height h 1
  • the pyramidal structural elements B with a triangular base have a height h 2.
  • the height h is about 0.70 mm Height h 2 is about
  • the thickness d of the microstructure plate M is 2 mm.
  • the thickness d of the microstructure plate M can also be more than 2 mm.
  • the height h, according to the invention is between 0.35 mm and 3.50 mm, preferably between 0.50 mm and 1, 00 mm.
  • the height h 2 is according to the invention between 0.12 mm and 1, 1 7 mm, preferably between 0.1 7 mm and 0.33 mm. From the heights h, and h 2 and the inclination angle ⁇ , the widths b 1 and b 2 can be determined from the geometry of the pyramid-shaped structural elements A and B.
  • Figure 3 shows a perspective view of the preferred embodiment of the microstructure plate M according to the invention according to Figure 2.
  • the cutting direction R, di the sectional view in Figure 2 is based, is indicated by a dashed line.
  • the pyramid-shaped structural elements partly have a base area in the form of an equilateral triangle, partly a base area in the form of a regular hexagon and are arranged across the surface.
  • the bases of seven structural elements A with a hexagonal base and the bases of 13 structural elements B with a triangular base are highlighted by borders.
  • the bases of the structural elements are arranged so that they cover the surface of the microstructure plate M gapless. This results in three main directions H "on the structured surface of the microstructure plate M, which are marked by black lines in Figure 3.
  • edges of the base surfaces of the structural elements are aligned along these main directions H 1" " 1 and form continuous, intersecting lines the production of a stamping tool is facilitated, with the structure of the microstructure according to the invention plate-M can be produced.
  • the required on the embossing tool structure can be produced by applying a continuous V-shaped grooves along the main directions H ' "' 1.
  • FIG. 4 shows a detailed view of the microstructure plate M according to the invention, as shown in FIG. 2.
  • the side surfaces 1 ' "VI and 2" of the pyramidal structural elements A and B have an inclination angle ⁇ of 35 ° with respect to the plane in which the base surfaces are arranged.
  • the opposite side surfaces of a pyramid-shaped structural element with a hexagonal base area enclose an angle of 1 to 10 °.
  • the base surfaces of the pyramidal structural elements are arranged so that their edges form continuous lines. Along these lines are sharp-edged ridges S.
  • FIG. 5 shows a further preferred embodiment of the microstructure plate M according to the invention pyramidal structural elements web-like connecting portions V 1 " “ 1 provided.
  • the width W of the web-like connecting regions V 1 " “ 1 is according to the invention about 0.1 mm.
  • a pyramid-shaped structural element with hexagonal base A pyramid-shaped structural element with hexagonal base

Abstract

L'invention concerne un dispositif pour le découplage réduit au niveau de l'éblouissement de la lumière provenant d'un luminaire. Le dispositif pour le découplage réduit au niveau de l'éblouissement de la lumière provenant d'un luminaire présente au moins une surface structurée, sur laquelle est disposé au moins un groupe (G) d'éléments de structure (A, B) en forme de pyramide, qui comprend un élément de structure (A), dont la surface de base est conçue sous forme d'un hexagone et deux éléments de structure (B), dont les surfaces de base sont conçues sous forme de triangles, les surfaces de base étant conçues et disposées de telle sorte que chaque côté des triangles est contigu à respectivement un côté de l'hexagone et les côtés contigus les uns aux autres présentent sensiblement la même longueur de côté. L'hexagone et les triangles sont conçus respectivement sous forme d'hexagone régulier et de triangles équilatéraux. L'invention concerne également une plaque à microstructure, qui comprend un dispositif de ce type, les éléments de structure (A, B) en forme de pyramide étant conçus alors de préférence sous forme de cavités en forme de pyramide dans le matériau de plaque.
PCT/EP2011/000795 2010-02-24 2011-02-18 Dispositif pour le découplage réduit au niveau de l'éblouissement de la lumière WO2011124294A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202010002744.6 2010-02-24
DE202010002744U DE202010002744U1 (de) 2010-02-24 2010-02-24 Vorrichtung zum blendreduzierten Auskoppeln von Licht

Publications (1)

Publication Number Publication Date
WO2011124294A1 true WO2011124294A1 (fr) 2011-10-13

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WO (1) WO2011124294A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11966070B2 (en) 2019-05-07 2024-04-23 Signify Holding, B.V. Light guide and a lighting device comprising a light guide

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011103981A1 (de) * 2011-06-10 2012-12-13 Siteco Beleuchtungstechnik Gmbh Prismenplatte
DE102016215605A1 (de) 2016-08-19 2018-02-22 Osram Gmbh Entblendungsplatte und Verfahren zum Herstellen einer Entblendungsplatte
DE102022109228A1 (de) * 2022-04-14 2023-10-19 HELLA GmbH & Co. KGaA Beleuchtungsvorrichtung für Fahrzeuge sowie Herstellungsverfahren

Citations (11)

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Publication number Priority date Publication date Assignee Title
US3764800A (en) * 1972-10-17 1973-10-09 Trilux Lenze Gmbh & Co Kg Cover plate for a lamp
DE2520429A1 (de) 1975-05-07 1976-11-18 Siemens Ag Lichtdurchlaessige abdeckung fuer leuchten
DE3125317A1 (de) * 1980-06-27 1982-04-01 Canon K.K., Tokyo Einstellscheibe
DE3442781A1 (de) * 1983-11-26 1985-06-05 Olympus Optical Co., Ltd., Tokio/Tokyo Bildplatte und verfahren zu ihrer herstellung
DE20107425U1 (de) 2001-04-30 2001-07-19 Karl Jungbecker Gmbh & Co Entblendung von Leuchtmitteln
DE10302564A1 (de) 2003-01-22 2004-07-29 Karl Jungbecker Gmbh & Co Optisches System zur Entblendung beliebiger Leuchtmittel
DE102006009325A1 (de) 2006-03-01 2007-09-06 Karl Jungbecker Gmbh & Co Optisches System zur Richtung des Lichtes durch eine Mikrokegelstruktur
DE102006011296A1 (de) 2006-03-11 2007-09-13 Karl Jungbecker Gmbh & Co Optisches System zur Richtung des Lichtes beliebiger Leuchtmittel
WO2008058585A1 (fr) 2006-11-17 2008-05-22 Zumtobel Lighting Gmbh Plaque transparente comprenant une structure superficielle pour déclencher de manière essentiellement non éblouissante la lumière produite par une lampe
US20090046370A1 (en) * 2007-08-13 2009-02-19 Hon Hai Precision Industry Co., Ltd. Prism sheet and liquid crystal display device using the same
US20090073565A1 (en) * 2007-09-17 2009-03-19 Hon Hai Precision Industry Co., Ltd. Prism sheet and backlight module using the same

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3764800A (en) * 1972-10-17 1973-10-09 Trilux Lenze Gmbh & Co Kg Cover plate for a lamp
DE2520429A1 (de) 1975-05-07 1976-11-18 Siemens Ag Lichtdurchlaessige abdeckung fuer leuchten
DE3125317A1 (de) * 1980-06-27 1982-04-01 Canon K.K., Tokyo Einstellscheibe
DE3442781A1 (de) * 1983-11-26 1985-06-05 Olympus Optical Co., Ltd., Tokio/Tokyo Bildplatte und verfahren zu ihrer herstellung
DE20107425U1 (de) 2001-04-30 2001-07-19 Karl Jungbecker Gmbh & Co Entblendung von Leuchtmitteln
DE10302564A1 (de) 2003-01-22 2004-07-29 Karl Jungbecker Gmbh & Co Optisches System zur Entblendung beliebiger Leuchtmittel
DE102006009325A1 (de) 2006-03-01 2007-09-06 Karl Jungbecker Gmbh & Co Optisches System zur Richtung des Lichtes durch eine Mikrokegelstruktur
DE102006011296A1 (de) 2006-03-11 2007-09-13 Karl Jungbecker Gmbh & Co Optisches System zur Richtung des Lichtes beliebiger Leuchtmittel
WO2008058585A1 (fr) 2006-11-17 2008-05-22 Zumtobel Lighting Gmbh Plaque transparente comprenant une structure superficielle pour déclencher de manière essentiellement non éblouissante la lumière produite par une lampe
US20090046370A1 (en) * 2007-08-13 2009-02-19 Hon Hai Precision Industry Co., Ltd. Prism sheet and liquid crystal display device using the same
US20090073565A1 (en) * 2007-09-17 2009-03-19 Hon Hai Precision Industry Co., Ltd. Prism sheet and backlight module using the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11966070B2 (en) 2019-05-07 2024-04-23 Signify Holding, B.V. Light guide and a lighting device comprising a light guide

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