NL2007980C2 - Device and method to illuminate objects. - Google Patents

Device and method to illuminate objects. Download PDF

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Publication number
NL2007980C2
NL2007980C2 NL2007980A NL2007980A NL2007980C2 NL 2007980 C2 NL2007980 C2 NL 2007980C2 NL 2007980 A NL2007980 A NL 2007980A NL 2007980 A NL2007980 A NL 2007980A NL 2007980 C2 NL2007980 C2 NL 2007980C2
Authority
NL
Netherlands
Prior art keywords
foil
light
foregoing
film
light source
Prior art date
Application number
NL2007980A
Other languages
Dutch (nl)
Inventor
Eric Alexander Dirven
Original Assignee
Dqm B V Nederland
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 Dqm B V Nederland filed Critical Dqm B V Nederland
Priority to NL2007980A priority Critical patent/NL2007980C2/en
Priority to PCT/NL2012/050885 priority patent/WO2013095117A2/en
Application granted granted Critical
Publication of NL2007980C2 publication Critical patent/NL2007980C2/en

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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
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • 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
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/02—Controlling the distribution of the light emitted by adjustment of elements by movement of light sources
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S6/00—Lighting devices intended to be free-standing
    • 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
    • F21Y2111/00—Light sources of a form not covered by groups F21Y2101/00-F21Y2107/00
    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0028—Light guide, e.g. taper
    • 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
    • G02B6/006—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide to produce indicia, symbols, texts or the like
    • 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

Abstract

The present invention relates to a device to illuminate an object, comprising an at least partially light guiding and plastically deformable foil;reflective surface means applied to at least a part of the surface of the foil for beamed light to exit the foil, wherein at least the reflective surface of the foil is deformable between two preferential positions, wherein the positions correspond to different beams of beamed light exiting the foil through the reflective surface means.

Description

Device and method to illuminate objects
In general, objects and environments are illuminated by lamps or luminaires with all kind of light sources. The light sources emit light, the objects reflect light waves and 5 become visible. As a light source, various sorts of lighting have appeared, such as incandescent lights, halogen light, sodium lights, TL tubes and most recently LED lights.
Traditional lighting (from the outside) does not only illuminate the object(s) to be 10 illuminated, but also illuminates their (surrounding) objects. In this fashion the object(s) to be illuminated become(s) visible, but are not highlighted, and the effect is not as remarkable as if the objects where the only objects that were illuminated. In other cases objects are illuminated from the inside. For instance, a light source is placed within a thin structure, making the structure seem to light up as a whole. This does however 15 require some form of transparency of the object for light beams to be able to traverse. In some cases this can be undesirable or even unachievable. Light guides that guide light through a surface to illuminate the entire surface also exist and are relatively energy efficient, however, they are rigid and not very versatile.
20 The goal of the present invention is to at least partially overcome the named problems, or to provide a usable alternative. A means to reach this goal is a device to illuminate objects, comprising an at least partially form fitting to the object attachable light guiding and plastically deformable foil and reflective surface means applied to at least a part of the surface of the foil for beamed light to exit the foil. Light is inserted into the 25 light guiding foil, and is kept there due to total internal reflection until specific reflective surface means are met or reflection is no longer possible. The reflective means cause internal reflection to be limited and allow light beams to exit the light guiding foil. The reflective means may be applied on the interior of, the exterior of or within the light guiding foil. In this fashion a wide array of objects, transparent or not, 30 can be lit by attaching this foil. Every day utensils can be turned into light sources increasing key features as usability and safety. Visibility of fast moving objects like trains can be increased by illuminating the whole train, rather than just a couple of lights on the front of the train. The reverse would also work; a plane covered in foil emitting the same colour as the sky it flies in, would be harder to spot from the ground.
2
In one embodiment the reflective surface means comprises grooves in or on the foil and can be printed, laser cut and/or etched into the foil to present a pattern on the foil for the selective exiting of light. The reflective means may be applied on the inside, the outside 5 or within the light guiding foil. For instance, light emitting arrows for airplanes or other public transportation means can be turned on in emergencies, or light emitting decorations can be placed at home, with printed patterns representing for instance Christmas icons. Light-emitting patterns can also be used to indicate workers on the side of the road, wearing a jacket made of foil with a recognisable pattern, making them 10 easier to spot, reducing possible accidents.
In another embodiment of the present invention materials with a refractive index between 1.0 and 1.9, preferably between 1.3 and 1.6 are used. These indices will cause total internal reflection of the light within the transparent medium in air. When the 15 surrounding of the medium is different from air, a second medium with lower refractive indices can be applied on top of the primary medium in order to attempt to achieve total internal reflection within the numerical aperture of the thus created waveguide.
In another embodiment of the invention the attachable foil is between 0.1mm and 10 20 mm thick. In this way the foil can be applied without adding too much weight to the object and/or changing the structural properties of the object to be illuminated. The foil generally comprises one of the following materials: - PMMA and PC for thinner layers and applications where less light can be lost 25 - PVC, epoxy resins and silicon gels for thicker layers and cheaper applications
In yet another embodiment of the present invention multiple layers of foil are used, creating a laminate of foil. Each layer has its own independent reflective surface means 30 for the selective exiting of light beams. In this way multiple colours can be entered into their own layer of foil, and upon exiting create a multicoloured effect. Because the layers are placed on top of each other a sense of depth can also be created because light seems to be coming from behind other light. Multiple layers of foil can also be used to 3 display images that seem to move by turning specific layers on and off in a suitable order.
In another embodiment of the present invention the foil is stretchable. This adds a level 5 of flexibility to the foil and also adds to possibility to inflate the foil. This could result for instance in light-emitting balloons, made of light guiding foil, but also in inflatable lights, boats and all sorts of other inflatable promotional means. In another embodiment of the present invention the foil itself is the object to be illuminated. Objects that can be made from foil can easily be turned into illuminated objects.
10
In another embodiment of the present invention a light source is connected to the foil. The connection between the two is made such that it attempts to guide and/or reflect as much light as possible into the (layers of) foil. This ensures efficient lighting because minimal light is lost in places where the light is not required. In some embodiments of 15 the invention the light source will be larger compared to the foil that it is guided to. In those cases the connection between light source and foil could comprise a wedge and/or a prism to make sure as much light emitted from the light source as possible is entered into the light guiding foil.
20 In another embodiment of the invention the light source is at least partially encased into the foil. In this fashion the connection between the two would be redundant. This way as much light emitted from the light source as possible enters the foil and reduces the number of connections, which benefits robustness. Preferably, Light Emitting Diodes (LED’s) are used as a light source because of their relatively small size, great energy 25 efficiency and comparatively low heat production. One powerful LED combined with a light guiding foil could replace conventional TL lighting and/or complete LED strips in LED TL’s.
In yet another embodiment of the present invention bonding agents, such as an adhesive 30 coating, are applied to connect the foil to the object. When the object comprises a rough surface for example, adding a bonding agent in gel-form would even out the rough patches and ensure a snug and firm connection between the foil and the object.
4
The invention provides a method to fabricate objects that can be illuminated, comprising the attachment of a foil to the object to be illuminated in a way described in detail above and supplying an adjacent to the foil located light source and/or a light source that is encased into the foil. The attachment of the foil to the object can be 5 preceded by the application of an at least partially liquid bonding agent, such as a gel, to the object. This depends mainly on the structure of the surface of the object to be illuminated.
Another method to fabricate objects that can be illuminated comprises the preforming of 10 a foil, to be at least partially form fitting with the object. Every day utensils often come in standard forms and shapes and illuminating those could be achieved by preforming a light guiding foil in a shape form fitting with the utensil, where the foil simply snaps on. This step simplifies applying the foil, which can then be used straight out of the box.
15 Yet another method to attach the foil to the object is using shrinkage. A generally used embodiment is the heat shrinkable tubing, which shrinks upon heat treatments and attaches itself firmly to the object it is placed on. A similar method can be used with the light guiding foil.
20 One method to provide the present invention with energy is by using induction. In general light sources require access to the power grid with power plugs and/or internal batteries. In this embodiment the electric for inductive power supply can be encased into the foil, allowing the powering of the foil by inductive means. In this way the foil can be powered semi-wireless.
25
In a final embodiment of the present invention the light guiding foil is protected by a protective layer and/or coating. This would protect the foil from for example the elements and scratching, ensuring a long lifespan of the light guiding foils.
30 With the present invention wiring can be reduced, a lot of square meters of existing transparent objects (like windows and umbrellas) become available for illumination and promotional means, safety can be increased and a lot of energy can be saved.
5
The present invention will be explained into more detail with reference to the following non-limiting figures, wherein: - Figure 1 shows a schematic representation of the invention; - Figure 2 shows schematically the reflecting of light and the entering of light 5 beams; - Figure 3 shows a schematic situation where the light source is embedded in the flexible medium; - Figure 4 shows a schematic representation of a multiple source effect; - Figure 5 shows multiple power supplies for the light source.
10 - Figure 6 shows multiple embodiments of the present invention.
Figure 1 shows an object to be lit (1) according to the present invention, equipped with an at least partially form fitting light guiding and plastically deformable foil (2) with reflective surface means (3) attached to at least part of the surface of the foil and an 15 adjacent light source (4).
Figure 2 shows the light guiding foil (2), where light from a light source (4) is entered into the foil (2) with a prism and/or wedge (6), and where light beams are reflected by the connection between the light source (5) and the foil until they enter the prism and/or 20 wedge (6) and foil (2).
Figure 3 shows a light source (4) embedded in the light-guiding foil (2) with reflective surface means (3). Light is entered into the foil and internally reflected until the reflective surface means are reached.
25
Figure 4 shows multiple light sources (4a, 4b and 4c), which enter light beams into multiple light-guiding foils (2a, 2b and 2c). Light is exiting the foils at the reflecting surface means (3a, 3b and 3c), creating a multiple colour, moving of depth effect.
30 Figure 5 shows three means of powering the light source. In case A, a battery (7) powers the light source (4). In case B, a power wire exits the medium, to be plugged into the power grid. In case C, inductive wiring (8) is encased into the foil, powering the light source (4) in a semi-wireless fashion. The inductive part of the power supply can be placed outside the light-guiding medium.
6
Figure 6 shows two main figures (A) and (B). Figure A shows the insertion of light into a transparent foil surrounded by air. Light is reflected internally on the interface with air, except if the critical angle is exceeded. Painted dots scatter the light, changing its 5 directions. Gradually the light will exit the transparent foil, in the figure the foil is tapered, increasing the angle of each reflection and forcing the light to exit the foil. Figure B1 shows an illuminated poster attached to a window, using wedges to insert light into the transparent foil and to contain the light in the poster area. Figure B2 shows how a wedge can be used to insert light into a transparent foil. Figure B3 shows a 10 similar construction compared to B2, but now a LED is placed inside the wedge.
Figure 7 shows multiple embodiments of the present invention (Fig Cl - Fig C8).
• Fig Cl shows a table, equipped with the foil. The overhanging light is not needed because the table itself can light up.
15 • Fig C2 shows Christmas decorations, which are printed on the foil to light up in a recognisable pattern.
• Fig C3 shows light-guiding foil that is attached to inner walls, lighting up a complete room.
• Fig C4 shows the top of a light raft, which is visible in the dark because 20 it emits light.
• Fig C5 shows the possibility of laying the foil on the floor, lighting a room from below.
• Fig C6 shows a bus, equipped with light guiding foil on the sides, for promotional means, and/or greater visibility and safety.
25 • Figure C7 shows an illuminated life vest made of transparent foil. This way a safety vest is not only reflecting light, but also lights up all the time, increasing visibility and safety.
• Figure C8 finally shows an umbrella made from and/or equipped with light guiding foil, illuminating possible dark alleys.

Claims (18)

1. Inrichting voor het doen oplichten van een object, omvattende: - een ten minste gedeeltelijk vormsluitend aan het object bevestigbaar 5 lichtgeleidend en plastisch vervormbaar folie; aan ten minste een deel van het oppervlak van het folie aangebrachte reflectievlakmiddelen voor het doen uittreden van in het folie ingekoppeld licht.Device for raising an object, comprising: - a light-conducting and plastically deformable film that can be attached to the object at least partially form-fitting; reflection surface means arranged on at least a part of the surface of the film for causing light coupled into the film to emerge. 2. Inrichting volgens één van de voorgaande conclusies, waarbij de reflectievlakmiddelen in een patroon op het folie zijn geplaatst voor het selectief laten uittreden van licht.Device as claimed in any of the foregoing claims, wherein the reflection surface means are placed in a pattern on the foil for selectively leaving light out. 3. Inrichting volgens één van de voorgaande conclusies, waarbij het folie een 15 brekingsindex heeft tussen de 1.0 en 1.9, in het bijzonder tussen de 1.3 en 1.6.3. Device as claimed in any of the foregoing claims, wherein the foil has a refractive index between 1.0 and 1.9, in particular between 1.3 and 1.6. 4. Inrichting volgens conclusie 1, waarbij het folie een dikte heeft tussen 0.1 mm en 10mm, bij voorkeur tussen de 0.5mm en 5mm.Device as claimed in claim 1, wherein the foil has a thickness between 0.1 mm and 10 mm, preferably between 0.5 mm and 5 mm. 5. Inrichting volgens een van de voorgaande conclusies, waarbij het folie ten minste één van de volgende materialen omvat: - PMMA; - PC; Transparant epoxies;Device as claimed in any of the foregoing claims, wherein the foil comprises at least one of the following materials: - PMMA; - PC; Transparent epoxies; 25. Silicon gels25. Silicon gels 6. Inrichting volgens één van de voorgaande conclusies, omvattende een laminaat van meerdere lagen folie, elk voorzien van aan ten minste een deel van het oppervlak van het folie aangebrachte reflectievlakmiddelen voor het 30 doen uittreden van in het folie ingekoppeld licht, voor het weergeven van effecten en/of meerdere kleuren.6. Device as claimed in any of the foregoing claims, comprising a laminate of several layers of film, each provided with reflection surface means arranged on at least a part of the surface of the film for causing light coupled into the film to emerge, for displaying effects and / or multiple colors. 7. Inrichting volgens één van de voorgaande conclusies waarbij het folie oprekbaar en/of opblaasbaar is.Device as claimed in any of the foregoing claims, wherein the foil is stretchable and / or inflatable. 8. Inrichting volgens één van de voorgaande conclusies, omvattende een verbinding voor het met een lichtbron verbinden van het folie.Device as claimed in any of the foregoing claims, comprising a connection for connecting the foil to a light source. 9. Inrichting volgens één van de voorgaande conclusies, waarbij de verbinding een prisma en/of een wig omvat voor het inkoppelen van licht in het folie.Device as claimed in any of the foregoing claims, wherein the connection comprises a prism and / or a wedge for coupling light into the foil. 10. Inrichting volgens één van de voorgaande conclusies, omvattende een hechtmiddel, zoals een kleeflaag, voor het met het object verbinden van het 10 folie.10. Device as claimed in any of the foregoing claims, comprising an adhesive, such as an adhesive layer, for connecting the foil to the object. 11. Inrichting volgens één van de voorgaande conclusies, waarbij een lichtbron ten minste gedeeltelijk in het folie ingesloten is.Device as claimed in any of the foregoing claims, wherein a light source is at least partially enclosed in the foil. 12. Werkwijze voor het vervaardigen van een oplichtbaar object, omvattende het aanbrengen van een folie volgens één van de voorgaande conclusies op het op te lichten object; het aanbrengen van een aan het folie grenzende en/of een zich in het folie bevindende lichtbron. 20A method for manufacturing a liftable object, comprising applying a foil according to any one of the preceding claims to the lifted object; arranging a light source adjacent to the foil and / or a light source located in the foil. 20 13. Werkwijze volgens conclusie 11, omvattende het onder tussenkomst van een ten minste gedeeltelijk vloeibaar hechtmiddel, zoals een gel, op het object aanbrengen van het folie.A method according to claim 11, comprising applying the foil to the object via an at least partially liquid adhesive, such as a gel. 14. Werkwijze volgens conclusie 11 of 12, omvattende het voorvormen van een folie in een vorm ten minste gedeeltelijk aansluitend aan het object.A method according to claim 11 or 12, comprising preforming a film in a mold at least partially contiguous to the object. 15. Werkwijze volgens één van de voorgaande conclusies, omvattende het door middel van krimpen op het op te lichten object aanbrengen van het flexibele 30 folie.15. Method as claimed in any of the foregoing claims, comprising of applying the flexible foil to the object to be lifted by shrinking. 16. Werkwijze volgens één van de voorgaande conclusies, omvattende het door middel van inductie van energie voorzien van de lichtbron.A method according to any one of the preceding claims, comprising providing the light source by means of induction of energy. 17. Werkwijze volgens één van de voorgaande conclusies, omvattende het aanbrengen van een beschermde laag over het folie.A method according to any one of the preceding claims, comprising applying a protective layer over the foil. 18. Object, voorzien van een inrichting volgens één van de conclusies 1-11, en/of 5 vervaardigd volgens een werkwijze volgens één van de conclusies 12-17.An object provided with a device according to one of claims 1 to 11, and / or manufactured according to a method according to one of claims 12 to 17.
NL2007980A 2011-12-16 2011-12-16 Device and method to illuminate objects. NL2007980C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NL2007980A NL2007980C2 (en) 2011-12-16 2011-12-16 Device and method to illuminate objects.
PCT/NL2012/050885 WO2013095117A2 (en) 2011-12-16 2012-12-13 Device and method to illuminate objects

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL2007980 2011-12-16
NL2007980A NL2007980C2 (en) 2011-12-16 2011-12-16 Device and method to illuminate objects.

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NL2007980C2 true NL2007980C2 (en) 2013-06-18

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US20100309684A1 (en) * 2009-06-05 2010-12-09 Silitek Electronic (Guangzhou) Co., Ltd. Flexible light-guiding module with waterproof function
WO2011053804A2 (en) * 2009-10-30 2011-05-05 3M Innovative Properties Company Illumination device having remotely powered lightguide

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