EP2989379A1 - Lampe permettant de produire un éclairage direct et un éclairage indirect - Google Patents

Lampe permettant de produire un éclairage direct et un éclairage indirect

Info

Publication number
EP2989379A1
EP2989379A1 EP14718087.1A EP14718087A EP2989379A1 EP 2989379 A1 EP2989379 A1 EP 2989379A1 EP 14718087 A EP14718087 A EP 14718087A EP 2989379 A1 EP2989379 A1 EP 2989379A1
Authority
EP
European Patent Office
Prior art keywords
light
main surface
luminaire according
reflector
structural elements
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.)
Ceased
Application number
EP14718087.1A
Other languages
German (de)
English (en)
Inventor
Helmut Feuerle
Marcel KILGA
Michael Spiegel
Andreas Schwaighofer
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
Original Assignee
Zumtobel Lighting GmbH Austria
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 Zumtobel Lighting GmbH Austria filed Critical Zumtobel Lighting GmbH Austria
Publication of EP2989379A1 publication Critical patent/EP2989379A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0063—Means for improving the coupling-out of light from the light guide for extracting light out both the major surfaces of the light guide
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/0008—Reflectors for light sources providing for indirect lighting
    • F21V7/0016—Reflectors for light sources providing for indirect lighting on lighting devices that also provide for direct lighting, e.g. by means of independent light sources, by splitting of the light beam, by switching between both lighting modes
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide

Definitions

  • the invention relates to a luminaire for generating a direct illumination and an indirect illumination, which has an LED light source and a light guide plate.
  • Such a lamp is known from DE 10 2008 014 317 AI.
  • the light guide plate is oriented horizontally, wherein the light of the LED light source is irradiated into the light guide plate via an edge side narrow side surface and further discharged via the downward facing main surface of the light guide plate.
  • the luminaire has second luminous means, which are arranged laterally next to the LED light source and the light guide plate. This is associated with corresponding expenditure or corresponding costs.
  • the invention has for its object to provide a corresponding improved luminaire.
  • the light should allow for a low overall height a simple design and do not require a separate light source to produce the indirect lighting.
  • a luminaire for producing a direct illumination and an indirect illumination which has an LED light source for generating a light, and a light guide plate having a first main surface and a second main surface, the edge over a narrow side surface with the first Kleinoberfikiee is connected, wherein the LED light source is arranged such that the light is irradiated on the narrow side surface in the light guide plate and is further emitted to a part for generating the direct illumination on the first major Stiloberfizze.
  • the lamp has a reflector, the is arranged adjacent to the second main surface.
  • the reflector has at least one light-transmissive region which is designed in such a way that a further part of the light is emitted through the light-transmissive region for the purpose of producing the indirect illumination via the second main surface.
  • the light generated by the LED light source can advantageously be used both to generate the direct illumination and to generate the indirect illumination. In this way it is possible to dispense with a separate light source for generating the indirect lighting.
  • the light-permeable area opens up the possibility of setting the proportion of light which serves to produce the indirect illumination to the light emitted by the luminaire in total as quasi as desired. This means that the luminaire can achieve a specific desired ratio of indirect lighting to direct lighting very precisely.
  • the translucent area is formed by a passage opening of the reflector. This allows a manufacturing technology particularly simple and advantageous embodiment of the translucent area.
  • the reflector is plate-shaped and plane parallel to the
  • the lamp can be designed with high efficiency with a very low height.
  • the light guide plate is on the second major surface
  • Structural elements for coupling the light over the first main surface are provided.
  • the decoupling of the light over the first main surface can be made particularly efficient and well adjusted.
  • Main surface emitted light is emitted particularly homogeneous. To this Way, in particular, that when looking at the first
  • Main surface no caused by the translucent area dark spot or inhomogeneity is recognizable or at least significantly reduced.
  • the structural elements within the surface area preferably have a greater density in terms of manufacturing technology than in the immediate surroundings.
  • the structural elements within the surface area are designed such that the part of the light which is emitted via the first main surface to generate the direct illumination is emitted homogeneously within a normal projection of the surface area and the immediate surroundings. This is advantageous with respect to the external appearance of the lamp and with respect to a particularly homogeneous light output.
  • the lamp has a plurality of pairs of an analogously designed transparent area of the reflector and a corresponding thereto
  • the structural elements are designed as a function of their distance from the LED light source, in particular denser with increasing distance. In this way it can be achieved that the light output over the entire first main surface viewed is particularly homogeneous, especially not with
  • the structural elements are formed by engraving, in particular by means of a laser treatment. This is advantageous in terms of manufacturing technology and makes it possible to design the structural elements and thus their effect particularly precisely.
  • the structural elements are formed by linear elements; This is manufacturing technology particularly easy to implement.
  • the line-shaped elements have a width between 0.2 mm and 1, 5 mm, in particular between 0.6 mm and 1.0 mm, for example, 0.8 mm. These values have proven to be particularly suitable.
  • the translucent area has a diameter between 5 and 50 mm.
  • the lamp is particularly suitable if it is designed in the form of a pendant lamp or floor lamp.
  • the luminaire is designed such that the ratio between the luminous flux, which is formed by the luminaire by the further part of the light for generating the indirect illumination and the total luminous flux, which is formed by the light emitted by the lamp as a whole, greater than 4%, preferably greater than 10%.
  • FIG. 1 shows a schematic diagram in the manner of a cross-section to the lighting technology
  • FIG. 3 shows a view of the first main surface of the light guide plate in a case without a special configuration of the structural elements in the region of the passage openings of the reflector
  • Fig. 4 is a view of the first main surface of the light guide plate in a case with a special configuration of the structural elements in Area of the passage openings of the reflector,
  • Fig. 5 is a view of the first main surface of the light guide plate in a case where in two through holes the
  • Structural elements have no special configuration, in a third through hole, the structural elements have a high gravitational density, in a fourth through hole, the structural elements have a too low engraving density and at a fifth through hole, the structural elements have a particularly suitable gravure density, so that the location of this fifth through hole is practically undetectable when looking at the first main surface, and
  • FIG. 6 shows an example of an embodiment of the structural elements in the region of a through-hole and its immediate surroundings.
  • Fig. 1 shows a schematic diagram in the manner of a cross section to the lighting structure of a lamp according to the invention for generating a direct lighting D and an indirect lighting /.
  • the luminaire has an LED light source 2 for generating a light and a light guide plate 3.
  • These two components 2, 3 may be arranged in a manner known per se, for example via a frame element.
  • Other components, such as power supply means of the LED light source 2 are not shown in the figure for clarity. They may be provided as known per se from the prior art.
  • the luminaire may in particular be an overall surface-shaped luminaire.
  • the lamp can have a particularly low height.
  • the LED light source 2 may comprise an elongated board which is aligned with its longitudinal axis normal to the plane of the drawing with respect to the illustration of FIG. 1 and on which, in particular along a straight line, a plurality of LEDs are arranged which generate the light.
  • the light guide plate 3 has a first main surface 31 and a second one
  • the LED light source 2 is arranged such that the light over the narrow
  • the light is then radiated to a part for producing the direct illumination D via the first large main surface 31, as schematically indicated in Fig. 2 by four exemplary light beams d1, d2, d3, d4 Irradiation is shown from one side, but it can generally be provided an irradiation of the light in the light guide plate 3 over several sides, so for example over two opposite sides.
  • the luminaire has a reflector 5, which is arranged adjacent to the second main surface 32.
  • the reflector 5 is preferably designed highly reflective. As a result, any loss of luminous flux by absorption of light can be kept very low.
  • the reflector 5 initially serves to direct a portion of the light emerging from the light guide plate 3 upwards, ie through the second main surface 32, back into the light guide plate 3.
  • the reflector 5 is shown separated from the light guide plate 3.
  • the reflector 5 In the assembled state, the reflector 5 to the Light guide plate 3 arranged adjacent, as shown in Fig. 1.
  • the reflector 5 is plate-shaped and arranged plane-parallel to the light guide plate 3.
  • the reflector 5 has at least one light-transmissive region 51, which is designed in such a way that a further part of the light is emitted through the light-transmissive region 51 to produce the indirect illumination / via the second main surface 32, as schematically illustrated in FIG of three other exemplary light beams il, i2, i3 indicated.
  • the light-permeable region 51 is preferably a recess or passage opening of the reflector 5. In this way, the light-permeable region 51 can be produced particularly easily.
  • the number of passage openings can be selected accordingly and their shapes can be suitably determined.
  • the reflector 5 is perforated for this purpose, so for example provided with corresponding through holes at the same distance and the same size. It is thus in particular no separate light source for generating the indirect lighting required.
  • the light guide plate 3 preferably on its second Schooberfikiee 32 structural elements 4.
  • the structural elements 4 so light rays of light are deflected so that they can leave the light guide plate 3 in the course. This makes it possible to increase the efficiency of the light output downwards, as is already known per se from the prior art.
  • FIG. 3 which by way of example shows a corresponding view of the first main surface 31 of the light guide plate 3 for this case.
  • the dark areas arise because there the light is coupled upwards, that is, via the second main surface 32 of the light guide plate 3, and the reflector 5 has the passage openings there.
  • the light guide plate 3 has a uniform brightness when viewed. In other words, usually the most homogeneous possible light output over the entire first main surface 31 is desired.
  • Structural elements 4 within the surface area 41 have a greater density than in the immediate vicinity 42. This makes it possible to increase the proportion of the downward light in the respective areas, while still allowing a partial release of the light upwards to produce the indirect illumination / takes place.
  • the greater density of the structural elements 4 in the areas in question can be advantageously produced, for example, simply by additional engraving.
  • FIG. 4 shows a case in which the structural elements 4 have an increased density at the relevant points, here produced by an additional engraving. It can be seen that, in the case shown here, the locations of the passage openings are no longer recognizable as dark areas, but rather appear lighter than their surroundings. Therefore, it can be achieved by suitable design of the structural elements 4, that the points where the through holes are located, are practically no longer recognizable. This is illustrated with reference to FIG. 5. Here are first two places to recognize LI, where the location of the through holes
  • the engraving density is set too high so that this point L2 appears brighter than its surroundings.
  • the engraving density is set too low, so that this point L 3 appears darker than their surroundings.
  • the engraving density is optimally chosen, so to speak, so that this point L5 practically does not differ in its brightness from its surroundings, and thus is practically not recognizable.
  • the structural elements 4 are preferably within the
  • Surface area 41 designed such that thereby the portion of the light that is emitted to generate the direct illumination D via the first main surface 31, is radiated homogeneously within a normal projection of the surface region 41 and the immediate environment 42.
  • the locations of the passage openings of the reflector 5 can be laminated in this manner, so to speak, and a particularly homogeneous light output can be achieved over the entire first main surface 31 of the light guide plate 3.
  • the lamp preferably has a plurality of pairs of an analogously designed transparent area 51, 5 of the reflector 5 and a corresponding thereto, analogously designed
  • the emission of light for generating the indirect illumination / is particularly suitable Taxes.
  • the structural elements 4 are designed as a function of their distance from the LED light source 2, in particular are made denser with increasing distance. This makes it possible to achieve that the light emission via the first main surface 31 is independent of the distance from the LED light source 2, as is known as such from the prior art.
  • the structural elements 4 can be formed particularly advantageously by engraving, in particular by means of a laser treatment.
  • the structural elements 4 may be formed by line-shaped elements, wherein the line-shaped elements preferably have a width between 0.2 mm and 1.5 mm, in particular between 0.6 mm and 1.0 mm, for example 0.8 mm. These particular values have been found to be particularly suitable in practice with respect to the effects described herein.
  • the structural elements 4 can thus be, for example, a grid or a grid structure.
  • the grid may be a square grid; more generally i can do it at the
  • Structural elements 4 however, for example, also lines, triangular lattice, area engravings, etc. act.
  • the translucent region 51 or the through-opening may, for example, have a diameter between 5 and 50 mm. There are several size parameters that influence each other. The bigger the
  • the denser the structural elements 4 or the grid must be selected for lamination.
  • the width of the grid lines also affects the efficiency of the lamination. The above values have been found to be particularly suitable in this regard.
  • the lamp may be, for example, a pendant lamp. However, it may also be, for example, a floor lamp.
  • the luminaire is designed in such a way that the ratio between the luminous flux which is formed by the luminaire by the further part of the light for producing the indirect illumination / and the total luminous flux which is formed by the light emitted by the luminaire as a whole is greater than 10% is. This corresponds to a classic definition of a luminaire for the generation of direct lighting and indirect lighting. But it is also possible that the indirect proportion is lower, about 4% to 5% to achieve lighting effects such. B. a corona effect.
  • the luminaire according to the invention allows a design with a low overall height in a comparatively simple design. To achieve the indirect lighting while no separate light source is required.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Planar Illumination Modules (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

L'invention concerne une lampe permettant de produire un éclairage direct (D) et un éclairage indirect (I). La lampe comporte une source lumineuse à LED (2) produisant une lumière, et une plaque guide d'ondes optiques (3) présentant une première surface principale (31) et une deuxième surface principale (32) qui est reliée à la première surface principale (31) côté bord par l'intermédiaire d'une surface latérale étroite (33). La source lumineuse à LED (2) est agencée de telle manière que la lumière est injectée dans la plaque guide d'ondes optiques (3) par l'intermédiaire de la surface latérale étroite (33), puis en partie diffusée par l'intermédiaire de la première grande surface principale (31) pour la production de l'éclairage direct (D). Par ailleurs, un réflecteur (5) est agencé de manière adjacente à la deuxième surface principale (32), le réflecteur (5) comportant au moins une zone transparente (51) qui est réalisée de telle manière qu'une autre partie de la lumière est émise par l'intermédiaire de la deuxième surface principale (32) en traversant la zone transparente (51) pour la production de l'éclairage indirect (I).
EP14718087.1A 2013-04-24 2014-04-16 Lampe permettant de produire un éclairage direct et un éclairage indirect Ceased EP2989379A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202013101772.8U DE202013101772U1 (de) 2013-04-24 2013-04-24 Leuchte zur Erzeugung einer Direktbeleuchtung und einer Indirekt-Beleuchtung
PCT/EP2014/057778 WO2014173769A1 (fr) 2013-04-24 2014-04-16 Lampe permettant de produire un éclairage direct et un éclairage indirect

Publications (1)

Publication Number Publication Date
EP2989379A1 true EP2989379A1 (fr) 2016-03-02

Family

ID=50513267

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14718087.1A Ceased EP2989379A1 (fr) 2013-04-24 2014-04-16 Lampe permettant de produire un éclairage direct et un éclairage indirect

Country Status (5)

Country Link
US (1) US10408990B2 (fr)
EP (1) EP2989379A1 (fr)
CN (1) CN105121950A (fr)
DE (1) DE202013101772U1 (fr)
WO (1) WO2014173769A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20240052992A1 (en) * 2022-08-11 2024-02-15 Abl Ip Holding Llc Collapsible Light Fixtures With Pliable Diffuser And Reflector

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004302443A (ja) * 2003-03-18 2004-10-28 Hitachi Displays Ltd 液晶表示装置
DE102009001170A1 (de) * 2009-02-26 2010-09-02 Evonik Röhm Gmbh Leuchte für Beleuchtungszwecke, deren Einfassung gleichzeitig als Kühlkörper für das LED-Leuchtmittel fungiert

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3187280B2 (ja) * 1995-05-23 2001-07-11 シャープ株式会社 面照明装置
JP3670949B2 (ja) * 2000-09-27 2005-07-13 三洋電機株式会社 面光源装置
TW200424619A (en) * 2003-03-18 2004-11-16 Hitachi Displays Ltd LCD apparatus
CN2769943Y (zh) * 2004-12-30 2006-04-05 群康科技(深圳)有限公司 双面液晶显示装置
US8303155B2 (en) 2007-10-19 2012-11-06 Sharp Kabushiki Kaisha Bifacial light emitting backlight
DE102008014317A1 (de) 2008-03-14 2009-09-17 Zumtobel Lighting Gmbh Leuchte mit getrennten Leuchtmitteln für Direktbeleuchtung und Indirektbeleuchtung
US8534896B2 (en) * 2009-07-10 2013-09-17 Koninklijke Philips N.V. Free form lighting module
JP6083931B2 (ja) 2011-05-27 2017-02-22 エルジー イノテック カンパニー リミテッド 照明モジュール

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004302443A (ja) * 2003-03-18 2004-10-28 Hitachi Displays Ltd 液晶表示装置
DE102009001170A1 (de) * 2009-02-26 2010-09-02 Evonik Röhm Gmbh Leuchte für Beleuchtungszwecke, deren Einfassung gleichzeitig als Kühlkörper für das LED-Leuchtmittel fungiert

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2014173769A1 *

Also Published As

Publication number Publication date
CN105121950A (zh) 2015-12-02
WO2014173769A1 (fr) 2014-10-30
DE202013101772U1 (de) 2014-07-28
US20160062030A1 (en) 2016-03-03
US10408990B2 (en) 2019-09-10

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