WO2013005151A1 - Module d'éclairage - Google Patents

Module d'éclairage Download PDF

Info

Publication number
WO2013005151A1
WO2013005151A1 PCT/IB2012/053330 IB2012053330W WO2013005151A1 WO 2013005151 A1 WO2013005151 A1 WO 2013005151A1 IB 2012053330 W IB2012053330 W IB 2012053330W WO 2013005151 A1 WO2013005151 A1 WO 2013005151A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
lighting module
area
exit surface
light guide
Prior art date
Application number
PCT/IB2012/053330
Other languages
English (en)
Inventor
Chien-Liang Yeh
Original Assignee
Koninklijke Philips Electronics N.V.
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 Koninklijke Philips Electronics N.V. filed Critical Koninklijke Philips Electronics N.V.
Publication of WO2013005151A1 publication Critical patent/WO2013005151A1/fr

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
    • 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
    • G02B6/0075—Arrangements of multiple light guides
    • G02B6/0076—Stacked arrangements of multiple light guides of the same or different cross-sectional area

Definitions

  • the invention generally relates to illumination technology, and more particularly relates to a lighting module and a lighting device.
  • a light guide can be employed in the luminaire for guiding light emitted from a light source within the luminaire.
  • the light guide is an optical device designed to transport light from the light source to an exit point or surface with minimal loss.
  • the light guide is generally constructed from an injection moulded or machined transparent component, wherein the light source, such as a fluorescent lamp or a plurality of light emitting diodes (LEDs), may be integrated at the edge of the transparent component.
  • the light source such as a fluorescent lamp or a plurality of light emitting diodes (LEDs)
  • a lighting module which comprises:
  • a light guide including:
  • each of the upper surface and the lower surface has a first area adjacent to the incident surface for guiding the light towards the exit surface through which a first portion of the light is emitted, and a second area adjacent to the exit surface for directing a second portion of the light out from said second area.
  • the lighting module enables light emitted from the light source within the lighting module to be guided so as to have multiple dimensions, i.e., both of the exit surfaces being substantially perpendicular to the direction of propagation of the light and the upper/lower surface being substantially parallel to the direction of propagation of the light, which yields more uniform light around the exit surface of the light guide.
  • a lighting device comprising a plurality of stackable lighting modules as described above.
  • Fig.l, Fig.2 and Fig.3 depict a lighting module 100 according to an embodiment of the invention
  • Fig.4 and Fig.5 depict a lighting module 200 according to another embodiment of the invention.
  • Fig.6 depicts a lighting module 300 according to a further embodiment of the invention
  • Fig.7 and Fig.8 depict a lighting module 400 according to a further embodiment of the invention
  • Fig.9 depicts a lighting device 500 according to an embodiment of the invention. Detailed Description
  • Fig.l, Fig.2 and Fig.3 depict a lighting module 100 according to an embodiment of the invention, wherein Fig.2 and Fig.3 are cross-sectional views of the lighting module 100 of Fig.l.
  • the lighting module 100 comprises a light source 11 for emitting light and a light guide 10 for guiding the light emitted by the light source 11 , wherein the light guide 10 further includes:
  • each of the upper surface 103 and the lower surface 104 has a first area 105 adjacent to the incident surface 101 for guiding the light towards the exit surface 102 through which a first portion 106 of the light is emitted, and a second area 107 adjacent to the exit surface 102 for directing a second portion 108 of the light out from said second area.
  • the light source 11 such as a fluorescent lamp or an LED device
  • the light may be introduced into the light guide 10 through the incident surface 101 in various directions, for example, towards the upper surface 103, the lower surface 104, or the exit surface 102.
  • the upper surface 103 and the lower surface 104 are parallel to each other.
  • the light propagating towards the lower surface 104 will have an angle of incidence and point of incidence on the lower surface 104 such that it may be reflected by the lower surface 104 in the first area 105 and then guided towards the exit surface 102.
  • the light may be reflected towards the first area 105 of the upper surface 103, and then reflected back again to the lower surface 104. After one or more such reflections, some of the light will be guided to the exit surface 102 and later issued therethrough.
  • the light may also be reflected towards the second area 107 of the upper surface 103 and the lower surface 104 after such reflections.
  • at least one of the upper surface 103 and the lower surface 104 comprises a diffusion structure 109 in the second area 107 for diffusely reflecting and/or refracting the light, which can overcome total reflection of light at the upper surface and the lower surface in the second area 107.
  • the diffusion structure 109 may comprise a plurality of distributed dots or protrusions with gaps between them. The gaps that are transparent permit light to be emitted out of the light guide 10 through the second area 107.
  • the light when propagating through the second area 107, the light will be further diffusely reflected away from the second area 107 and emitted out, and/or it will be diffusely refracted out through the second area 107.
  • the diffusion leads to improved uniformity of light.
  • the diffusion structure 109 comprises a plurality of white dots, such as barium sulfate, which have opaque and coarse surfaces facing the light guide 10.
  • the plurality of white dots can diffusely reflect at least a portion of the light within the light guide 10 to the opposite surface.
  • gaps between the distributed white dots on the opposite surface permit the reflected light to be emitted out of the light guide 10.
  • the diffusion structure 109 comprises a plurality of protrusions, such as a hemispherical or spherical structure within the light guide 10.
  • the plurality of protrusions can diffusely reflect a portion of the light within the light guide 10, which is later emitted out through the opposite surface of the light guide 10.
  • the plurality of protrusions can also cause another portion of the light to be diffusely refracted out through the protrusions, just like a lens.
  • a combination of the white dots and protrusions, or other diffusion structures such as coarse surfaces or the like, can also be used as the diffusion structure 109, which is within the scope of the invention.
  • the propagation of the light first refracted by the incident surface 101 towards the upper surface 103 is substantially the same as that towards the lower surface 104 described above.
  • the exit surface 102 is substantially parallel to the incident surface 101, and the light propagating towards the exit surface 102 will be substantially emitted out of the light guide 100 through the exit surface 102.
  • light can be emitted out not only from the exit surface 102, but also from the second area 107 around the exit surface 102, so that multiple-dimension illumination, especially 3D illumination, can be achieved.
  • the first area 105 adjacent to the incident surface 101 is used to guide the light towards the exit surface 102.
  • the upper surface 103 and the lower surface 104 are parallel to each other and guide the light by means of reflection thereof, particularly total internal reflection.
  • the angle at which light is incident on the upper surface 103 or the lower surface 104 is small enough, that is, smaller than the total reflection angle, the light propagating towards the upper surface 103 or the lower surface 104 may be refracted out of the light guide 10 directly. Under this condition, the first portion 106 or the second portion 108 of the light may have a lower intensity.
  • the first area 105 of the upper surface 103 and the second surface 104 is coated with a reflective layer, such as a silver plating, for reflecting the light.
  • This reflective layer can significantly prevent the light within the light guide 10 from leaking out in the first area 105.
  • Fig.4 and Fig.5 depict a lighting module 200 according to another embodiment of the invention.
  • the lighting module 200 further comprises a diffuser 211 mounted on the exit surface 202, which is configured to uniformly bend the first portion 206 of the light emitted from the exit surface 202.
  • the diffuser 211 can be a translucent or transparent lens with coarse surfaces. Compared with the lighting module 100 without such a diffuser in Fig.l, the lighting module 200 enables the first portion 206 of the light to be emitted more uniformly.
  • a prism 212 for bending the first portion 206 of the light emitted from the exit surface 202 into a predetermined direction is mounted on the exit surface 202.
  • the lighting module 200 in Fig.5 comprises a diffusion structure 209 on only one of the upper surface 203 and the lower surface 204, in the second area 207.
  • the diffusion structure 209 may be an opaque white plane which diffusely reflects the light, and therefore light can be substantially directed to one side of the lighting module 200.
  • the use of such a prism 212 and/or diffusion structure 209 can controllably change the direction of the first portion 206 of the light in dependence on the desired application(s).
  • Fig.6 depicts a lighting module 300 according to a further embodiment of the invention.
  • each of the upper surface 303 and the lower surface 304 of the light guide 30 has a slope 310 in the first area 305 for bending the light received from a light source 31 towards the exit surface 302.
  • each of the upper surface 303 and the lower surface 304 of the light guide 30 is smooth in the second area 307.
  • This kind of structure can effectively overcome total internal reflection of light.
  • each of the surfaces of the first area 305 can be further coated with a reflective layer 313 for reflecting the light, which prevents the light from leaking out in the first area 305.
  • a portion of the light can propagate towards the exit surface 302 and is emitted later.
  • Another portion of the light may propagate towards the second area 307 of the upper and lower surfaces and is emitted from the lighting module 300 through said second area at a later point in time.
  • the second area 307 depicted in Fig.6 can also comprise the diffusion structure 109 depicted in Fig.2 and Fig.3 for diffusing the light, which gives the light emitted out of the lighting module 300 more uniformity.
  • the cases where only one of the upper surface 303 and the lower surface 304 comprises a slope 310 are also applicable for guiding the light towards the exit surface 302.
  • the upper surface and the lower surface of the light guide within the lighting module according to embodiments of the invention may be shaped so as to be circular, elliptical, square, rectangular, hexagonal or octagonal.
  • the light guide can be made of plastics, PMMA, glass, polycarbonate or other transparent materials. Those of ordinary skill in the art will understand that the shape of the upper surface and the lower surface and the constitution of the light guide will not limit the scope of the invention.
  • the lighting module according to various embodiments of the invention can be applied in lighting fields including, but not limited to, luminaires, backlighting devices, display devices and so on.
  • Fig.7 and Fig.8 depict a lighting module 400 according to a further embodiment of the invention, wherein Fig.8 is a cross-sectional view of the lighting module 400 of Fig.7.
  • the lighting module 400 comprises a light guide 40 and a light source 41 for emitting light towards an incident surface (not shown) of the light guide 40.
  • the light source 41 may comprise a fluorescent lamp, an incandescent lamp or a solid state lighting lamp (for example, an LED device).
  • the light source 41 may be integrally mounted on the incident surface of the light guide 40 so that the light generated from the light source 40 can be substantially introduced into the light guide 40.
  • the light source 40 such as a plurality of LED devices, can be mounted on the light guide 41, using an adhesive.
  • an upper surface 403 and a lower surface 404 of the light guide 40 are shaped as a ring, in which the light source 41 is embedded.
  • the lighting module 400 may further comprise a heat sink 42 mounted on the light source 41 for dissipating heat generated by the light source 41 , thereby enabling better thermal management of the lighting module 400.
  • the light source 41 can be mounted on the heat sink 42 with thermal interface material, which facilitates the heat transfer from the light source 41 to the heat sink 42.
  • Fig.9 depicts a lighting device 500 according to an embodiment of the invention.
  • the lighting device 500 comprises a plurality of stackable lighting modules 50 according to various embodiments mentioned above.
  • the lighting modules 50 are ring-shaped, with one or more light sources (not shown) embedded therein.
  • the light sources can be in the form of, for example, a fluorescent tube or a plurality of LED devices.
  • the light guides within lighting modules of the lighting device 500 contact each other via the upper/lower surfaces, which have apparent edges between them.
  • the light guided by the light guides can be emitted through the exit surface, and can also be emitted through the upper and/or lower surface of the light guides, and it can further be introduced into adjacent light guides of different lighting modules.
  • light emitted by different lighting modules can be mixed so that the light emitted from the lighting device 500 is substantially uniform, and dark zones on the edges of various light guide sheets can be avoided.
  • the first area of the upper and lower surfaces can substantially prevent the light from leaking out, the loss of light within the lighting device 500 can be significantly avoided.
  • the lighting modules 50 of the lighting device 500 can comprise light sources emitting various colours.
  • the light emitted from the lighting device 500 may appear like a rainbow after being mixed at the edges of the lighting modules 50, which improves the decorative effect of the lighting device 500.

Landscapes

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

Abstract

L'invention concerne un module d'éclairage (100, 200, 300, 400, 50) selon un mode de réalisation de l'invention, lequel module d'éclairage comprend : une source lumineuse (11, 31, 41) destinée à émettre une lumière, un guide de lumière (10, 30, 40) comprenant une surface incidente (101) à travers laquelle la lumière émise par la source lumineuse est introduite dans le guide de lumière, une surface de sortie (102, 202, 302) tournée vers la surface incidente, une surface supérieure (103, 203, 303, 403) et une surface inférieure (104, 204, 304, 404) disposées en opposition l'une par rapport à l'autre et chacune coupant la surface incidente et la surface de sortie, chacune de la surface supérieure et de la surface inférieure ayant une première surface (105, 205, 305) adjacente à la surface incidente destinée à guider la lumière vers la surface de sortie à travers laquelle une première partie (106, 206) de la lumière est émise et une seconde surface (107, 207, 307) adjacente à la surface de sortie destinée à diriger une seconde partie (108) de la lumière à l'extérieur de ladite seconde surface. Le module d'éclairage permet à une lumière émise par la source lumineuse dans le module d'éclairage d'être guidée de manière à avoir de multiples dimensions, résultant en une lumière plus uniforme autour de la surface de sortie du guide de lumière. De plus, lorsqu'une pluralité de modules d'éclairage sont empilés ensemble avec leurs surfaces supérieure/inférieure adjacentes les unes avec les autres, des zones sombres aux bords des surface de sortie peuvent être réduites considérablement.
PCT/IB2012/053330 2011-07-05 2012-06-29 Module d'éclairage WO2013005151A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNPCT/CN2011/076866 2011-07-05
CN2011076866 2011-07-05

Publications (1)

Publication Number Publication Date
WO2013005151A1 true WO2013005151A1 (fr) 2013-01-10

Family

ID=46717914

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2012/053330 WO2013005151A1 (fr) 2011-07-05 2012-06-29 Module d'éclairage

Country Status (1)

Country Link
WO (1) WO2013005151A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013064948A1 (fr) * 2011-11-03 2013-05-10 Koninklijke Philips Electronics N.V. Feu arrière à del, destiné en particulier à une bicyclette
US10066793B2 (en) 2014-02-13 2018-09-04 Philips Lighting Holding B.V. LED luminaire
US10451793B2 (en) 2013-12-20 2019-10-22 Signify Holding B.V. Lighting device having plural light-sources and light guide with wavelength converting means and out coupling means
FR3095259A1 (fr) * 2019-04-16 2020-10-23 Psa Automobiles Sa Guide de lumière plan ayant une surface de sortie de lumière à finition lisse et feu de véhicule automobile comportant un tel guide.
CN114278908A (zh) * 2021-12-25 2022-04-05 广东洲明节能科技有限公司 灯具

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5899557A (en) * 1994-08-11 1999-05-04 Mcdermott; Kevin Multi-source lighting device
US6536921B1 (en) * 1993-01-21 2003-03-25 Jerome H. Simon Architectural lighting distributed from contained radially collimated light and compact efficient luminaires
EP1925877A1 (fr) * 2005-08-26 2008-05-28 CCS Inc. Dispositif d éclairage
WO2009101716A1 (fr) * 2008-02-14 2009-08-20 Mitsubishi Electric Corporation Centre de commande
US20100079996A1 (en) * 2008-09-26 2010-04-01 Lg Electronics Inc. Portable terminal having transparent cover member

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6536921B1 (en) * 1993-01-21 2003-03-25 Jerome H. Simon Architectural lighting distributed from contained radially collimated light and compact efficient luminaires
US5899557A (en) * 1994-08-11 1999-05-04 Mcdermott; Kevin Multi-source lighting device
EP1925877A1 (fr) * 2005-08-26 2008-05-28 CCS Inc. Dispositif d éclairage
WO2009101716A1 (fr) * 2008-02-14 2009-08-20 Mitsubishi Electric Corporation Centre de commande
US20100079996A1 (en) * 2008-09-26 2010-04-01 Lg Electronics Inc. Portable terminal having transparent cover member

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013064948A1 (fr) * 2011-11-03 2013-05-10 Koninklijke Philips Electronics N.V. Feu arrière à del, destiné en particulier à une bicyclette
US9156511B2 (en) 2011-11-03 2015-10-13 Koninklijke Philips N.V. LED rear lamp, in particular for a bicycle
US10451793B2 (en) 2013-12-20 2019-10-22 Signify Holding B.V. Lighting device having plural light-sources and light guide with wavelength converting means and out coupling means
US10066793B2 (en) 2014-02-13 2018-09-04 Philips Lighting Holding B.V. LED luminaire
FR3095259A1 (fr) * 2019-04-16 2020-10-23 Psa Automobiles Sa Guide de lumière plan ayant une surface de sortie de lumière à finition lisse et feu de véhicule automobile comportant un tel guide.
CN114278908A (zh) * 2021-12-25 2022-04-05 广东洲明节能科技有限公司 灯具
CN114278908B (zh) * 2021-12-25 2024-04-12 广东洲明节能科技有限公司 灯具

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