EP2526448A1 - Plaque conductrice optique avec éléments de structure contenant du phosphore - Google Patents

Plaque conductrice optique avec éléments de structure contenant du phosphore

Info

Publication number
EP2526448A1
EP2526448A1 EP11701370A EP11701370A EP2526448A1 EP 2526448 A1 EP2526448 A1 EP 2526448A1 EP 11701370 A EP11701370 A EP 11701370A EP 11701370 A EP11701370 A EP 11701370A EP 2526448 A1 EP2526448 A1 EP 2526448A1
Authority
EP
European Patent Office
Prior art keywords
light
flat side
guide plate
light guide
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.)
Withdrawn
Application number
EP11701370A
Other languages
German (de)
English (en)
Inventor
Rebekka Wimmer
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 EP2526448A1 publication Critical patent/EP2526448A1/fr
Withdrawn legal-status Critical Current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
    • G02B6/005—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
    • 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
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
    • G02B6/0021—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces for housing at least a part of the light source, e.g. by forming holes or recesses
    • 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
    • G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
    • G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface 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

Definitions

  • the invention relates to a light guide plate having a first flat side and a second flat side parallel thereto and a front side, wherein the end face to
  • Coupling of light is provided and the second flat side for decoupling the light.
  • the first flat side has structural elements which serve to decouple the light.
  • the invention relates to a lighting arrangement with such a light guide plate and a lamp with such
  • a corresponding light guide plate is known from a lighting arrangement in which light from an LED (light emitting diode) is used for coupling, which emits blue light; the blue light is converted into white light by a light-influencing element comprising phosphorus before being coupled into the light guide plate.
  • LED light emitting diode
  • the invention has for its object to provide a light guide plate, with an improved coupling of white light is possible.
  • a corresponding lighting arrangement and a corresponding light to be specified.
  • a light guide plate which has a first flat side, a second flat side parallel to the first flat side and an end face, wherein the end face is provided for coupling light and the second
  • the Flat side is provided for coupling out the coupled via the front side light.
  • the first flat side has structural elements which serve to decouple the light.
  • the structural elements have phosphorus.
  • the phosphor can be so spatially remote from a corresponding light source, which serves to couple the light over the front side, are arranged so that a possibly negative-acting heating of the phosphorus caused by the operation of the light source can be avoided.
  • the structural elements are made of phosphor. This allows a particularly high efficiency with respect to the spectral change of the light in the interaction with the structural elements.
  • the structural elements are printed on the first flat side of the light guide plate, preferably by means of a screen-cracking method.
  • the first flat side has recesses in which the structural elements are arranged. In this way, the diffuse
  • the structural elements are arranged unevenly on the first flat side and / or of different sizes.
  • the distribution of the light that is emitted from the light guide plate on the second flat side specifically affect.
  • a relatively uniform radiation can be achieved by the structural elements with increasing distance from the corresponding light source are denser or formed with increasing area.
  • the structural elements comprise a first structural element and a wide structural element, wherein the first structural element comprises a phosphor of a first type and the wide structural element comprises a phosphor of a second type which differs from the first type.
  • Light guide plate is emitted via the first structural element, a light of a different spectral composition than over the second structural element. In this way, a light output of the light guide plate can be effected, which - over the region of the second flat side - at different points is spectrally different.
  • the structural elements are advantageously connected to one another via a carrier element.
  • the carrier element may in particular be a metal plate. This allows a particularly effective cooling of the structural elements.
  • the metal plate may be made reflective, thereby increasing the efficiency of the light guide plate.
  • a lighting arrangement which has a light guide plate according to the invention.
  • the lighting arrangement further comprises a light source for coupling the light over the front side.
  • the light source is designed such that it can emit blue light. By interacting with phosphorus, blue light can be converted into white light.
  • the light source may comprise at least one LED that can emit blue light.
  • a luminaire which has a lighting arrangement according to the invention.
  • the invention is explained in more detail below with reference to an embodiment and with reference to the drawings. Show it:
  • Fig. 2 is a sketch of a variant with respect to the training of
  • Fig. 1 shows a cross-sectional diagram of an exemplary embodiment of a
  • the optical waveguide plate has a first flat side 2 and a second flat side 4 parallel to the first flat side 2 and an end face 6.
  • the front side 6 is provided for coupling light.
  • the illumination arrangement can in particular have a light source 10, which is designed such that it can emit blue light.
  • the light source 10 may be an LED or a plurality of LEDs arranged along the end face 6 in a row.
  • the second flat side 4 is provided to decouple the coupled via the light source 10 in the light guide plate light.
  • the structural elements 8 can in particular be designed in such a way that they diffuse the light coupled in via the end face 6 in such a way that the light scattered in the further course at least partially leaves the light guide plate via the second flat side 4.
  • the structural elements 8 have phosphorus or consist of phosphorus. By interacting with phosphorus, blue light can be converted into white light. In this meadow is made possible that of the light guide plate or of the
  • the phosphor of the structural elements 8 can be arranged so far away from the light source 10 that heating caused by the operation of the light source 10 can not negatively affect the phosphor.
  • the structural elements 8 thus fulfill a dual function according to the invention. They not only serve to decouple the light from the light guide plate, but also cause a spectral change in the light.
  • the structural elements 8 can be formed, for example, by the fact that phosphorus is printed on the first flat side 2 of the light guide plate.
  • a printing method is suitable for this purpose.
  • the first flat side 2 of the light guide plate has recesses or depressions 20 in which the structural elements 8 are arranged.
  • the recesses 20 can be designed such that they further require the coupling of the light, which has been coupled via the end face 6.
  • Structural elements 8 can be arranged within the depressions 20, for example at a slight distance.
  • the structural elements 8 can furthermore be connected to one another via a carrier element.
  • the carrier element may be, for example, a
  • Metal plate 12 act. It can be achieved with the metal plate 12 that the surface of the metal plate 12 facing the first flat side 2 of the light guide plate has a reflective effect, so that the efficiency of the illumination arrangement can be increased as a whole. In addition, can be achieved by appropriate dimensioning that metal plate 12 acts as a heat sink for the structural elements 8.
  • a corresponding plate-shaped reflector is also advantageously possible in the embodiment shown in FIG. 1 with respect to an improvement of the efficiency.
  • the reflector can be arranged correspondingly adjacent to the first flat side 2 of the light guide plate. Also this reflector can be a
  • a corresponding retarder is not mandatory.
  • a light output of the light guide plate can also be done on the first flat side 2.
  • no such reflector is advantageously provided.
  • a luminaire can be provided with a lighting arrangement according to the invention, in which a light output for generating direct lighting is provided via the second flat side 4 and via the first
  • Structural elements 8 are arranged unevenly on the first flat side 2 and / or are of different sizes. For example, therefore, the degree of printing can be location-dependent. In this way, the distribution of the light that is emitted via the second flat side 4 of the light guide plate can influence.
  • the structural elements 8 are arranged to become denser with increasing distance from the light source 10 and / or each cover an increasingly larger area of the first flat side 2. As further indicated in FIG.
  • the structural elements 8 comprise a first structural element 81 and a second structural element 82, wherein the first structural element 81 comprises a phosphor of a first type and the second structural element 82 comprises a phosphor of a second type different from the first kind.
  • the first structural element 81 may have a first phosphor composition and the second structural element 82 may have a second phosphorus composition
  • Phosphor composition Different phosphor compositions generally produce different white light upon interaction with blue light. Thus, it can be achieved that is emitted from the Lichfleiterplatte light that has different white tones at different locations.
  • An advantage is a B el euehtun gsanix with an inventive
  • Lichtlcitcrplatte provided as part of a luminaire.
  • the second flat side 4 of the light guide plate can serve as a beam surface of the luminaire.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

L'invention concerne une plaque conductrice optique avec une première face plane (2), une deuxième face plane (4) parallèle à la première face plane et une face frontale (6). La face frontale (6) est prévue pour le couplage entrant de la lumière et la deuxième face plane (4) pour le couplage sortant de la lumière entrée par la face frontale (6). La première face plane (2) présente des éléments de structure (8) qui servent au couplage sortant de la lumière et qui présentent du phosphore. De cette façon, le phosphore peut être disposé de manière éloignée spatialement d'une source de lumière (10) qui sert au couplage entrant de la lumière par la face frontale (6), de telle sorte qu'un échauffement du phosphore, susceptible d'être désavantageux, provoqué par le fonctionnement de la source de lumière (10), peut être évité. De plus, il devient possible de prévoir en différents endroits de la première face plane (2) des éléments de structure (8) qui diffèrent dans leur composition en phosphore, de telle sorte que, de cette façon, aux différents endroits de la plaque conductrice optique, la lumière sortante présente différentes compositions spectrales, c'est-à-dire par exemple différentes variétés de blanc.
EP11701370A 2010-01-20 2011-01-17 Plaque conductrice optique avec éléments de structure contenant du phosphore Withdrawn EP2526448A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202010001155U DE202010001155U1 (de) 2010-01-20 2010-01-20 Lichtleiterplatte mit phosphorhaltigen Strukturelementen
PCT/EP2011/050537 WO2011089097A1 (fr) 2010-01-20 2011-01-17 Plaque conductrice optique avec éléments de structure contenant du phosphore

Publications (1)

Publication Number Publication Date
EP2526448A1 true EP2526448A1 (fr) 2012-11-28

Family

ID=42115032

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11701370A Withdrawn EP2526448A1 (fr) 2010-01-20 2011-01-17 Plaque conductrice optique avec éléments de structure contenant du phosphore

Country Status (5)

Country Link
US (1) US20130021822A1 (fr)
EP (1) EP2526448A1 (fr)
CN (1) CN102770790A (fr)
DE (1) DE202010001155U1 (fr)
WO (1) WO2011089097A1 (fr)

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EP2748657B1 (fr) 2011-11-08 2017-09-27 Philips Lighting Holding B.V. Unité d'éclairage comprenant un guide d'ondes
WO2014006501A1 (fr) * 2012-07-03 2014-01-09 Yosi Shani Appareil d'éclairage au phosphore distant planaire
US9874317B2 (en) 2013-05-03 2018-01-23 Philips Lighting Holding B.V. Solid state lighting device
CN103323904A (zh) * 2013-06-21 2013-09-25 北京京东方光电科技有限公司 导光板及应用其的背光模组、显示装置
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Also Published As

Publication number Publication date
WO2011089097A1 (fr) 2011-07-28
US20130021822A1 (en) 2013-01-24
CN102770790A (zh) 2012-11-07
DE202010001155U1 (de) 2010-04-22

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