[go: up one dir, main page]

EP2238487A2 - Dispositif de conduction optique, dispositif d'éclairage pourvu d'un tel dispositif de conduction optique, et procédé de fabrication d'un tel dispositif de conduction optique - Google Patents

Dispositif de conduction optique, dispositif d'éclairage pourvu d'un tel dispositif de conduction optique, et procédé de fabrication d'un tel dispositif de conduction optique

Info

Publication number
EP2238487A2
EP2238487A2 EP08842992A EP08842992A EP2238487A2 EP 2238487 A2 EP2238487 A2 EP 2238487A2 EP 08842992 A EP08842992 A EP 08842992A EP 08842992 A EP08842992 A EP 08842992A EP 2238487 A2 EP2238487 A2 EP 2238487A2
Authority
EP
European Patent Office
Prior art keywords
light guide
optical fiber
islands
reflection
light
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Withdrawn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
EP08842992A
Other languages
German (de)
English (en)
Inventor
Georg Diamantidis
Fred Tonhofer
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.)
NOCTRON SOPARFI SA
Original Assignee
NOCTRON SOPARFI SA
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 NOCTRON SOPARFI SA filed Critical NOCTRON SOPARFI SA
Publication of EP2238487A2 publication Critical patent/EP2238487A2/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Withdrawn legal-status Critical Current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
    • 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
    • G02B6/0013—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
    • 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

Definitions

  • Light guide device moistening device with such a light guide device and method for producing such a light guide device
  • the invention relates to a light guide device according to the preamble of claim 1, a lighting device according to the preamble of claim 22 and a method according to the preamble of claim 25.
  • Light conductor means of the type mentioned v / ground for example, used in lighting devices to be flat construction as possible for technical and / or aesthetic reasons, being generated by such illumination devices useful light to be delivered mainly via the first main surface of the light guide member of the light guide.
  • Input optical waveguide devices are used, for example, in the backlighting of liquid crystal panels in liquid crystal displays, which are generally known as LCD screens. LCD screens are particularly popular because of their flat design.
  • Such LCD screens comprise a liquid crystal panel, which is illuminated by means of a lighting device of the type mentioned.
  • the illuminants used require additional components, such as a hole reflector, a Fresnel lens and usually a plurality of diffusion filters, which are arranged between the liquid crystal panel and the lighting means.
  • the diffusion filters attenuate the intensity of the radiation emitted by the illumination device by about 10% before reaching the liquid crystal panel.
  • the shadow mask has an even stronger effect. Through them, about 25% to 30% of the radiation emitted by the illumination device is absorbed, which is why only a correspondingly smaller proportion of light reaches the liquid crystal panel to be illuminated. In addition, it comes through the shadow mask to adverse interference effects.
  • the Fresnel lens is provided. However, this also causes the angle at which the screen can be viewed to be reduced, so that an image produced by it is still clearly visible.
  • the flat-building properties are also increasingly in lighting devices in the form of lamps for lighting rooms or outdoor areas in demand because the flat design an attractive appearance can be achieved.
  • Known low-profile lighting devices have a passive light-emitting body and a primary light source.
  • Passive illuminants have light-conducting properties, con However, without additional active primary light source emit no light. Regardless of a flat design, it is desirable for passive filaments to emit the useful light without major intensity losses relative to the light emitted by the light source.
  • passive luminous bodies in such lighting devices should be able to emit useful light in the desired intensity over a considerable surface area, so that even large rooms and / or extensive outdoor areas can be illuminated with a single active primary light source.
  • optical fiber devices that are able to forward light coupled in to them over long distances, on the one hand, and deliver useful light with high light output on the other hand.
  • the reflection device By the reflection device, the light output of the optical fiber device is increased by, for example, via the second main surface of the light guide element emitted light is also reflected in the light guide element and can leave this as useful light on the first main surface.
  • the reflection device is, for example, in the form of a reflection foil formed, which is applied flat on the second main surface of the light guide element.
  • the length of the route, over which light can be conducted and after which useful light can be emitted by the light guide device with sufficient intensity depends on the structure of the light guide element.
  • the intensity of the useful light generally decreases relatively sharply with increasing distance from the light source.
  • the light-guiding properties of the optical waveguide device are improved since light can be transmitted by reflection without excessive intensity losses from one material island to the next island of material along the second main surface of the optical waveguide element. However, part of the light is always reflected in the direction of the interior of the light guide element, which results in a more homogeneous distribution of intensity within the light guide element.
  • islands of material is to be understood as meaning regions of reflective material which are not directly connected to corresponding adjacent islands of reflective material.
  • the islands of material may be arranged in an uneven distribution to counteract negative optical effects associated with periodic structures.
  • reflection particles are distributed in a carrier material, which in turn may be selected according to one of claims 7 or 8.
  • the light guiding effect of the optical waveguide device can be achieved by the measure according to claim 10.
  • the optical waveguide device is designed as indicated in claim 12, decor or information patterns can be formed and rendered recognizable to an observer. These can be either black and white or colored. Such a light guide device can be used for example in signs or decorative lights.
  • the efficiency of the optical fiber device can be further increased.
  • the material islands may have different outer contours in plan view in the direction of the second main surface of the light guide element and in particular in claim 18.
  • a good efficiency of the optical waveguide device can be achieved if the material islands have a radial extension in a direction towards the second main surface of the optical waveguide element, as indicated in claim 19.
  • a uniform over the extent of the light guide element efficiency of the optical fiber device could be achieved at distances between two islands of material, which correspond to the distances specified in claim 20.
  • the object of the invention is also to provide a lighting device of the type mentioned, the luminous efficacy is improved.
  • a lighting device having the features specified in claim 22. Due to the high efficiency of the light guide device, light generated by the light sources can be effectively converted into useful light. Such a lighting device can be used for backlighting the liquid crystal panel of an LCD screen or as a stand-alone light source for lighting rooms or outdoor areas.
  • a lighting device can be created, the primary light source can be effectively used for the illumination of remote indoor or outdoor areas.
  • decor or information pattern can be generated by a suitable combination of imprint and islands of material.
  • imprint and islands of material Depending on whether or not the illuminants are in operation, different images may be visible to the observer since only the islands of material illuminate with active illuminants. However, areas without islands of material appear dark to the viewer compared to the glowing islands of material. In daylight, the print is perceived as a normal printed film. As a result, the room for maneuver is very high.
  • FIG. 1 shows a section through an optical waveguide device with material islands made of a reflection material
  • FIG. 2 shows a section through the optical waveguide device according to FIG. 1 along the section line II - II there, wherein the material islands have a circular outer contour;
  • FIG. 3 shows a section, corresponding to FIG. 2, of a modified optical waveguide device, in which the material islands have a square outer contour;
  • FIG. 4 shows a section, corresponding to FIG. 2, of a further modified optical waveguide device, in which the material islands again have a circular outer contour but a larger radial extent and a greater distance from each other than in FIG. 2;
  • FIG. 5 shows a section, corresponding to FIG. 2, of a further modified optical waveguide device, in which pairs of material islands have opposite semi-circular outer contours;
  • FIG. 6 shows a section, corresponding to FIG. 2, of a further modified optical waveguide device, in which the material islands are designed like ribs;
  • FIG. 7 shows a section corresponding to FIG. 2 of a further modified optical waveguide device, in which the material islands have a rectangular outer have contour;
  • FIG. 8 shows a section, corresponding to FIG. 2, of a further modified optical waveguide device, in which the material islands have an oval outer contour which corresponds to the outer contour of two mutually spaced semicircles, which are connected by straight lines;
  • FIG. 9 shows a section through an illumination unit, which encompasses the optical waveguide device according to FIG. 1, and through a liquid crystal panel attached to the illumination unit;
  • FIG. 10 shows a lighting device with a plurality of optical waveguide devices
  • FIG. 11 shows a section through an information label, which comprises a light guide device according to FIG. 1, in which a printed reflector substrate is used.
  • FIGS. 1 and 2 show an optical waveguide device 10 which comprises, as a light guide element, a planar and substantially homogeneous light guide plate 12 made of transparent, optical quality acrylic glass. Also, fiber optic elements 12 with other than planar geometries can be used.
  • the light guide plate 12 may also be made of another homogeneous translucent material, such as a glass or an epoxy resin.
  • the light guide plate 12 is preferably clear and free of streaks and bubbles.
  • the light guide plate 12 has a first main surface 14, over which, for example, two opposite each other Overlying narrow surfaces 16, 18 coupled light is emitted as useful light.
  • the coupling of light over the narrow surfaces 16, 18 in the light guide plate 12 is indicated in Figure 1 by the wavy arrows 20.
  • a second main surface 22 of the light guide plate 12 extends parallel spaced to its first main surface 14th
  • the light guide device 10 On the side of the second main surface 22 of the light guide plate 12, the light guide device 10 comprises a reflection device 24. This serves to homogeneously distribute light which leaves the light guide plate via its second main surface along the second main surface 22 of the light guide element 12 and also proportionally into Direction to the inside of the light guide plate 12 to reflect the yield of the light guide plate 12 via the first
  • Main surface 14 leaving the useful light of the light guide device 10 to increase.
  • the reflection device 24 comprises material islands 26 made of a highly reflective reflection material, which contact the second main surface 22 of the light guide plate 12 and which are arranged substantially regularly. The latter can be seen in FIG. It is also possible to dispense with a periodic arrangement of the material islands 26.
  • the reflective material of the material islands 26 is preferably translucent or transparent.
  • the reflective material with the reflective particles and pigments are added, as they are used in tinted glasses, acrylic or other plastics.
  • FIGS. 1 and 2 only one material island 26 is provided with a reference character. Between the material islands 26 remain areas which are free of reflection material. As can be seen in FIG. 2, the material islands 26 have a circular outer contour in a plan view in the direction of the second main surface 22 of the light guide plate 12.
  • the material islands 26 contact a reflector substrate in the form of a white paper sheet 28. This is held by the material islands 26 at a distance from the second main surface 22 of the light guide plate 12, so that it does not touch. In this way, between the light guide plate 12 facing outer surface 30 of the paper sheet 28, the second main surface 22 of the light guide plate 12 and the material islands 26, a Lichtleit- channel system 32 is formed, which will be discussed in more detail below.
  • the distance between the white paper sheet 28 and the second major surface 22 of the light guide plate 12 and thus the thickness of the material islands 26 are about 1 micron to about
  • the white paper sheet 28 has a basis weight of from 50 g / m 2 to 200 g / m 2 , preferably from 80 g / m 2 to 170 g / m 2 , more preferably from 100 g / m 2 to 150 g / m 2, and more preferably of 120 g / m 2 .
  • the paper sheet 28 may be obtained from both a cellulosic fiber and a synthetic fiber based paper.
  • a white plastic film may also be used. preferably made of PET, PVC or polystyrene, or a mirror film may be provided.
  • a reflective layer 36 for example in the form of a self-adhesive mirror film or a reflective layer of metal, especially aluminum, which was applied directly, usually by vapor deposition, to the reflector substrate 28.
  • This sandwich arrangement comprising the reflection layer 36, the white paper sheet 28 and the material islands 26 covered by the reflection device 24 is covered by a housing 38 of the reflection device 24, the bottom surface 40 of which rests against the reflection layer 36.
  • the housing 38 can also be dispensed with in a modification.
  • the reflection material from which the material islands 26 are formed comprises reflection particles of scandium oxide.
  • oxides of lanthanum and the rare earth metals such as cerium oxide, preseodymium oxide, neodymium oxide, samarium oxide, europium oxide, gadolinium oxide, terbium oxide, dysprosium oxide, holmium oxide, erbium oxide, thulium oxide, yttrium oxide or lutetium oxide can serve as the material for the reflection particles.
  • only reflection particles of pure scandium oxide or pure ytterbium oxide are provided.
  • the reflection on the reflection particles can take place on diffuse surfaces or on reflecting surfaces. Ideally, individual separate reflection particles form the material islands 26. In the exemplary embodiments shown here, the reflection particles are in turn distributed homogeneously in a carrier material, for which in particular a Epoxy resin or a polyester resin in question.
  • a pattern is printed on the second main surface 22 of the optical waveguide plate 12 using a reflection color, e.g. by screen printing.
  • the reflection paint comprises the reflection particles of scandium oxide or other compounds mentioned above in a finely homogeneous distribution.
  • a corresponding pattern can also be printed on the reflector substrate 28, in particular the white paper sheet 28.
  • the reflection ink used is a screen-printable adhesive which is known per se, for example a liquid resin binder containing a hardener, to which previously reflection particles of, in particular, scandium oxide have been admixed.
  • This adhesive which is provided with reflection particles, is printed on a corresponding reflector substrate, for example a paper, in a corresponding printing machine, which can be present, for example, in a width of 20 cm to 2.5 m.
  • the remaining islands of material 26 can be covered with a silicone film and the paper thus printed can be wound onto a roll with the silicone film and thus stored.
  • sheets of such printed paper can then be coated by means of a cylinder printing unit, for example, acrylic plates, which serve as an optical fiber element 12. This results in a laminate structure of paper sheet 28 and light guide element 12, in which the above-mentioned distance between the paper sheet 28 and the second main surface 22 of the light guide element 12 remains.
  • a silicone material in particular an elastic silicone compound, which can be obtained by adding a hardener to a less viscous silicone oil can serve as a binder for the reflection color.
  • a silicone oil provided with a hardener, in which the reflection particles are homogeneously distributed can be printed on either the second main surface 22 of the light guide plate 12 or the white paper sheet 28, so that it becomes elastic after hardening of the less viscous silicone oil Silicone compound corresponding material islands 26 form.
  • the reflective particles have a diameter of about 0.5 ⁇ m to about 300 ⁇ m, preferably from about 0.5 ⁇ m to about 50 ⁇ m, more preferably from about 0.5 ⁇ m to about 4, depending on the volume provided by the material islands 26 ⁇ m and more preferably about 2 ⁇ m.
  • the reflection particles are largely immobile within the binder. With an elastic binder, however, they may deform with the binder.
  • FIGS. 3 to 8 show sections of various modifications of the optical waveguide device 10 corresponding to FIG. 2, wherein the material islands 26 each have different outer contours and distances from each other in plan view in the direction of the second main surface 22 of the optical waveguide element 12.
  • the outer contour of the material islands 26 may correspond, for example, to that of a circle (FIGS. 2 and 4), a semicircle (FIG.
  • the areal coverage of the material islands 26 on the second main surface 22 of the light guide plate 12 in the direction of the narrow surfaces 16, 18 decreases inwards. That is, the distances between the islands of material 26 become larger with increasing distance from the narrow surfaces 16, 18 in this direction.
  • proportionally more light from material islands 26 is reflected as in the more inner area, thus a possible loss of intensity of the light depending on the distance from the narrow sides 16, 18 of the light guide plate 12 is taken into account.
  • the material islands 26 have the outer contour of a semicircle, as shown in Figure 5, these may be arranged in pairs so that the straight outer edges of two material islands 26 are opposed.
  • the islands of material 26 have in supervision in the direction of second main surface 22 of the light guide element 12 seen, so in the plane of the islands of material, a radial extent of about 0.01 mm to about 100.0 mm, preferably from about 0.05 mm to about 10.0 mm, more preferably from about 0th , 1 mm to about 5.0 mm, and more preferably from about 0.2 mm to 1.0 mm. If material islands 26 have an irregular outer contour, the mean clear outer contour of the corresponding material islands 26 can be used as a reference variable for their radial extent.
  • the distance between two islands of material 26 is about 0.01 mm to about 100.0 mm, preferably about 0.05 mm to about 10.0 mm, more preferably about 0.1 mm to about 3.0 mm and particularly preferably about 0 , 2 mm to 1.0 mm.
  • a good light reflection and light-guiding effect of the optical waveguide device 10 is present in particular when the ratio of the radial extent of the material islands 26 to their distance from one another is approximately 1: 4 to approximately 5: 1.
  • not less than 0.5 g of reflection particles preferably scandium oxide 99.9% of white powder, should be distributed in a volume of 1 liter of the carrier material.
  • Reflective particles preferably scandium oxide 99.9% white powder, distributed.
  • the light guide channel system 32 As already mentioned above, between the second main surface 22 of the light guide plate 12, which is assigned to this outside surface 30 of the white paper sheet 28 and the material islands 26 formed the light guide channel system 32. Light which leaves the light guide plate 12 via its second main surface 22 in the direction of the material islands 26 is partially reflected by the reflection particles present in the material islands 26 in many spatial directions with a directional component parallel to the second main surface 22 of the light guide plate 12.
  • a part of the light can be reflected again in the direction of the white paper sheet 28. Accordingly, light from the white paper sheet 28 can be reflected toward the light guide plate 12, with wide reflection at the surface 30 of the white paper sheet. In this way, a portion of the light within the channel system 32 is forwarded. In this case, light is reflected in part by material islands 26 or the reflection particles distributed therein and thus passed on from a material island 26 through the channel system 32 to the next material island 26.
  • the reflection particles made of scandium oxide or another suitable compound cause reflections in a homogeneous manner over the extent of the second main surface 22 of the light guide plate 12 or of the material islands 26, in which light is deflected at an angle such that a part thereof strikes upon impact on the second main surface 22 of the light guide plate 12 enters into this and leaves it on the first main surface 14 as useful light again.
  • FIG. 9 An example of such a lighting device in the form of a lighting unit 42 is shown in FIG. 9 in connection with the illumination of a liquid crystal panel 44.
  • the lighting unit 42 comprises the light guide device 10 as a secondary light-coupled passive lighting body and a respective housing 46 or 48 with U-shaped cross-section and not specifically provided with a reference end walls, which are supported on the opposite narrow surfaces 16, 18 of the light guide plate 12.
  • the respective open side of the housing 46 or 48 points in the direction of the correspondingly adjacent narrow surface 16 or 18 of the light guide plate 12.
  • the housing 46 defines, with the narrow surface 16 of the light guide plate 12, an interior space 50 in which light sources are arranged as a primary light source in the form of a plurality of semiconductor light chips 52.
  • the semiconductor light-emitting chip 52 comprises, for example, an n-type layer of n-GaN or n-type InGaN and a p-type layer of a III-V semiconductor material such as p-type GaN. Between such an n-type and such a p-type layer, an MQW layer may be disposed. MQW is the abbreviation for "Multiple Quantum Well". An MQW material contains an interlayer which has an electronic band structure modified according to the sub-lattice structure and emits corresponding light at other wavelengths. By choosing the MQW layer, the spectrum of the radiation emitted by the pn-semiconductor luminescent chip can be selectively influenced.
  • fluorescent tubes can be designed as compact fluorescent lamps, which are also known under the term energy-saving lamps or CFL tubes. Fluorescent lamps or cold cathode tubes are also suitable as fluorescent tubes. Cold cathode tubes are also known by the term CCFL tubes.
  • the interior 50 of the housing 46 is filled with a light-conducting liquid in the form of liquid silicone oil 54, which is indicated in FIG. 9 in the form of circles and directs light emitted by the semiconductor light chips 52 to the narrow surface 16 of the light guide plate 12.
  • a light-conducting liquid in the form of liquid silicone oil 54 which is indicated in FIG. 9 in the form of circles and directs light emitted by the semiconductor light chips 52 to the narrow surface 16 of the light guide plate 12.
  • heat generated by the semiconductor luminescent chip 52 is dissipated to the outside, in particular to the walls of the housing 46, by the silicone oil 54.
  • the p-type GaN / n-InGaN semiconductor light emitting chip 52 irradiates ultraviolet light and blue light in a wavelength range of 420 nm to 480 nm when voltage is applied.
  • fine phosphor particles 56 are homogeneously distributed in the silicone oil 54 and are made of transparent solid-state materials comprising color centers. These phosphor particles 56 are indicated in FIG. 9 as circles, which are smaller than the circles which characterize the silicone oil 54. se.
  • the phosphor particles 56 may each be a mixture of several different types of phosphor particles.
  • the radiation emitted by the semiconductor light chips 52 radiation can be converted into a radiation having a spectrum which is adapted to a desired spectrum. If phosphor particles 56 are omitted, the lighting unit 42 emits blue light.
  • semiconductor luminescent chips 52 are electrically connected in parallel and can be supplied with voltage via two supply lines 58 and 60. For this end the supply lines 58 and 50 in externally accessible connections.
  • the light emitting phosphor chips 52 may also be connected in series when working with a higher supply voltage.
  • the inner walls of the housing 46 are provided with a reflection layer 62, whereby light which is first emitted by the semiconductor luminescent chips 52 in a direction running away from the light guide plate 12 is reflected onto the same or onto its narrow surface 16.
  • the lighting unit 42 is arranged in FIG. 9 on the rear side 64 of the liquid crystal panel 44. Opposite the rear side 64, the liquid crystal panel 44 has a visible side 66.
  • a liquid crystal panel, as it is used in ⁇ example in liquid crystal screens, is in and of itself known, which is why at this point to a more detailed explanation is omitted.
  • the illumination unit 42 is arranged such that the first main surface 14 of the light guide plate 12 extends parallel to the liquid crystal panel 44 and in the direction of the latter Rear side 64 points. Between the first main surface 14 of the light guide plate 12 and the back side 64 of the liquid crystal panel 44, an optical coupling layer 68 made of a thick silicone oil or of an elastic silicone mass is provided. The silicone material is also indicated here by circles.
  • the optical coupling layer 68 made of the elastic silicone composition can be obtained by adding a hardener to a more thin-flowing silicone oil.
  • the optical coupling layer is in direct contact with the first main surface 14 of the light guide plate 12 and with the outer surface of the Flussigkristall- panel 44 on the rear side 64 in contact.
  • the optical coupling layer 68 may also be a resin, for example, an epoxy resin or a polyester resin.
  • the optical coupling layer 68 can be obtained by curing a liquid applied resin, to which a hardener has been added, as it is known per se.
  • a uniform high-intensity light is emitted via the first main surface 14 of the light guide plate 12, which is transmitted via the coupling layer 68 of silicone oil or a viscous silicone composition to the liquid crystal panel 44 and illuminates it from its rear side 64.
  • optical waveguide device 10 within a lighting unit 42 for backlighting a Flussigkristall-panel 44 is intended to be only an example of the use of the optical fiber device 10 here.
  • Another possibility is to use the lighting unit 42 - without liquid crystal panel 44 - as a lamp for lights from outside or inside areas. Due to the large reflection effect and the associated very good Lxchtleichtenschaften the Lxchtleiter issued 10 lighting units 42 can be created, which have relatively large dimensions, but need only bulbs 52 with low power consumption.
  • the liquid-crystal panel 44 on the visible side 66 may be provided with microlenses not specifically shown here.
  • the emerging light can be both bundled and redirected to meet the respective requirements of the lighting design.
  • a lighting unit 42 with a light guide plate 12 having a length of 5 m, a width of 10 cm to 20 cm and a thickness of 1 mm to 8 mm, wherein only bulbs with a power of 2 W to 5 W are necessary in order to be able to radiate a uniform useful light of high intensity over the first main surface 14 of the light guide plate 12. Accordingly, one or more such lighting units 42 can be used for the effective illumination of tunnels, roads or buildings, in particular industrial halls.
  • FIG. 10 shows a lighting system 100 with a plurality of optical waveguide devices 70 to 88, which in their Structure of the light guide device 10 correspond and partially have different dimensions and outer contours.
  • optical waveguide devices 72, 74, 76, 78 and 84 which are not specifically designated in FIG. 10, are in each case connected via an optical waveguide cable 90, as is known per se, to a central lighting unit 92, which is the primary one Light source is used and the emitted light is coupled via optical coupling elements 94 in the optical fiber cable 90.
  • all optical fiber devices 70 to 88 serve as passive filaments.
  • the central lighting unit 92 can include, for example, semiconductor light chips 52 or other light sources, as described in connection with the lighting unit 42, which are arranged within a largely opaque housing 96.
  • the optical fiber devices 70 and 72 are connected to one another via a further optical fiber cable 90 '. Radiation emitted by the optical waveguide device 70 over its narrow surface is thus coupled into this optical waveguide cable 90 'and transmitted from the optical waveguide device 70 to the optical waveguide device 72.
  • optical waveguide devices 78, 80 and 82 are connected to one another via connecting pieces 98, so that light coupled into the optical waveguide device 78 is coupled into the optical waveguide device 80 and from there into the optical waveguide device 82.
  • the optical waveguide devices 78, 80 and 82 are thus arranged in the manner of a series connection.
  • the three optical fiber devices 84, 86 and 88 are connected to one another via corresponding connecting pieces 94. There, light coupled into the centrally arranged light guide device 84 is transmitted to the two light guide devices 86 and 88 laterally flanking the light guide device 84.
  • a light-conducting material such as e.g. Silicone oil, be provided between the opposing narrow surfaces of two optical fiber devices within a connecting piece 98.
  • the light leaving the optical waveguide devices 70 to 88 via their respective first main surface 14 has an intensity which corresponds approximately to that of the luminous unit 92 or its light sources.
  • a lighting system 100 which comprises the central lighting unit 92 and a plurality of optical fiber devices 70 to 88, the latter being light-conducting connected to the central lighting unit 92 and / or one another, a considerably large area or even a building with a plurality of rooms can be illuminated ,
  • a central lighting unit 92 for example, a
  • Light source 52 is used with semiconductor light chips, as described above in connection with the lighting unit 42, so at a power consumption of e.g. 25 watts a light intensity of 2125 lumens at the central light unit 92 can be achieved.
  • the light-conducting devices 70 to 88 of the lighting system 100 can each emit light with an intensity of approximately 2000 lumens.
  • a corresponding pattern of a provided with reflection particles, screen-printable adhesive by means of a corresponding printing press on the reflector substrate 28 are printed.
  • the adhesive serving as the carrier material for the reflection particles is preferably clear and optically transparent after curing.
  • the adhesive can also be formed from an acrylate-based material, in particular from polymethyl methacrylate, or a dispersion adhesive or a UV-curing adhesive, such as a polyacrylate.
  • the used optical adhesive in the cured state preferably has a refractive index which approximately corresponds to the refractive index of the light guide plate 12.
  • ink-jet methods can be used, as used in rapid prototyping and in so-called 3D printing.
  • material islands of different composition for example with regard to the density distribution of the reflection particles and optionally the admixture of pigment particles and / or phosphors, can thus also be applied to the reflector substrate 28 in one operation.
  • signs or decorative lights can also be produced in another application. This will be explained below with reference to an exemplary embodiment of a sign 102, which is shown in FIG. 11. The following explanations apply mutatis mutandis to a decorative lamp right.
  • the sign 102 includes a slightly modified lighting unit 42, wherein the main surface 14 of the Lichtlei- terplatte 12 forms the visible surface of the sign 102.
  • the modification consists in that the reflector substrate 28 carries an imprint 104 on its outer surface 30 facing the material islands 26. This can be any color or black and white image.
  • the imprint 104 does not have to form an uninterrupted layer on the reflector substrate 28.
  • the thickness of the print 104 corresponds to the thickness of the print job in per se known printing method, such as offset printing or digital printing, and is in the range of about 1 micron.
  • a film in particular a white plastic film used.
  • the above-mentioned paper sheet or mirror foil are also suitable.
  • the signpost 102 can now be used without the semiconductor light-emitting chips 52 are operated. In this case, an observer of the sign 14 sees the image of the imprint 104 shining through the layer with the material islands 26 and the light guide plate 12.
  • the semiconductor light-emitting chips 52 are activated and coupled in the manner described above, white light in the light guide plate 12.
  • the imprint 104 is then clearly visible to the viewer of the sign 102 at the points that are touched by the material islands 26. The viewer then sees the image of the imprint 104 rasterized.
  • the reflector substrate 28 is provided in a manner known per se with the imprint 104 before the printing of the material islands 26.
  • the imprint 104 can be dispensed with and the image to be displayed can be formed by a corresponding arrangement of the material islands 26 on a light or white reflector substrate 28.
  • the imprint 104 may be light or white.
  • the human eye, with active semiconductor light emitting chips 52, can detect the difference in brightness between the areas of islands of material 26 and the areas without the islands of material 26.
  • the islands of material 26 appear to a viewer of the sign 102 as bright areas when light is coupled into the light guide plate 12, whereas the areas between the islands of material 26 appear dark.
  • a screened image can be generated with active semiconductor light-emitting chips 52. Without light coupling, however, no image can be recognized in this case.
  • planar light guide plate 12 light guide elements 12 are used with other than planar geometries, lighting devices 10 and, accordingly, signs 102 as cylinders, part cylinders, cones, truncated cone, corrugated sheets and the like can be formed.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Planar Illumination Modules (AREA)

Abstract

L'invention concerne un dispositif de conduction optique (10 ; 70, 72, 74, 76, 78, 80), comportant : un élément de conduction optique (12) qui est délimité par une première surface principale (14) et une deuxième surface principale (22) espacée parallèlement à la première ; et un dispositif de réflexion (24) qui est disposé sur le côté de la deuxième surface principale (22) de l'élément conducteur de lumière (12) et au moyen duquel la lumière peut être réfléchie au moins en direction de l'intérieur de l'élément conducteur de lumière (12). Le dispositif de réflexion (24) comprend des ilots de matière (26) en une matière réfléchissante de préférence transparente. L'invention concerne en outre : un dispositif d'éclairage (42 ; 100) qui comprend un tel dispositif de conduction optique (10 ; 70, 72, 74, 76, 78, 80) ; et un procédé de fabrication du dispositif de conduction optique (10 ; 70, 72, 74, 76, 78, 80).
EP08842992A 2007-10-18 2008-10-16 Dispositif de conduction optique, dispositif d'éclairage pourvu d'un tel dispositif de conduction optique, et procédé de fabrication d'un tel dispositif de conduction optique Withdrawn EP2238487A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200710050271 DE102007050271B4 (de) 2007-10-18 2007-10-18 Lichtleitereinrichtung sowie Beleuchtungsvorrichtung mit einer solchen Lichtleitereinrichtung
PCT/EP2008/008772 WO2009052992A2 (fr) 2007-10-18 2008-10-16 Dispositif de conduction optique, dispositif d'éclairage pourvu d'un tel dispositif de conduction optique, et procédé de fabrication d'un tel dispositif de conduction optique

Publications (1)

Publication Number Publication Date
EP2238487A2 true EP2238487A2 (fr) 2010-10-13

Family

ID=40490048

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08842992A Withdrawn EP2238487A2 (fr) 2007-10-18 2008-10-16 Dispositif de conduction optique, dispositif d'éclairage pourvu d'un tel dispositif de conduction optique, et procédé de fabrication d'un tel dispositif de conduction optique

Country Status (4)

Country Link
EP (1) EP2238487A2 (fr)
CN (1) CN101896843A (fr)
DE (1) DE102007050271B4 (fr)
WO (1) WO2009052992A2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2720403C (fr) * 2008-04-02 2016-02-23 Basf Se Procede d'epuration du n<sb>2</sb>o
EP2382495A1 (fr) * 2008-12-23 2011-11-02 Koninklijke Philips Electronics N.V. Système de guide optique et réflecteur pour commander l'extraction de la lumière
CN105733088A (zh) * 2014-05-13 2016-07-06 上海宇明光电材料技术有限公司 一种led灯管的改性塑料制备方法
KR102463204B1 (ko) * 2017-12-18 2022-11-03 현대자동차 주식회사 광 가이드
AT523067B1 (de) * 2019-12-04 2021-05-15 Hueck Folien Gmbh Lichtleitplatte

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6229003A (ja) * 1985-07-30 1987-02-07 株式会社トキメック 背面反射式光拡散装置
EP0500089B1 (fr) * 1991-02-21 1996-08-14 Tosoh Corporation Dispositif d'éclairage par l'arrière
JPH07176794A (ja) * 1993-12-17 1995-07-14 Nichia Chem Ind Ltd 面状光源
US5796450A (en) * 1994-12-16 1998-08-18 Canon Kabushiki Kaisha Illumination device and liquid crystal display apparatus including same
US6447135B1 (en) * 1999-10-08 2002-09-10 3M Innovative Properties Company Lightguide having a directly secured reflector and method of making the same
DE10065728B4 (de) * 2000-12-29 2009-04-23 Robert Bosch Gmbh Hinterleuchtungsvorrichtung und Flüssigkristallanzeige sowie deren Verwendung in einem Kraftfahrzeug
WO2005093860A1 (fr) * 2004-03-26 2005-10-06 Sharp Kabushiki Kaisha Dispositif électroluminescent
JP2005310756A (ja) * 2004-03-26 2005-11-04 Koito Mfg Co Ltd 光源モジュールおよび車両用前照灯
DE102007025573A1 (de) * 2007-05-31 2008-12-04 Noctron Holding S.A. Flüssigkristall-Anzeigefeld

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009052992A2 *

Also Published As

Publication number Publication date
DE102007050271A1 (de) 2009-04-30
WO2009052992A2 (fr) 2009-04-30
CN101896843A (zh) 2010-11-24
WO2009052992A3 (fr) 2009-10-15
DE102007050271B4 (de) 2012-02-02

Similar Documents

Publication Publication Date Title
DE69724411T3 (de) Beleuchtungsvorrichtung und anzeige welche diese verwendet
EP1282171B1 (fr) Source lumineuse plane à base de diodes électroluminescentes
DE69228655T2 (de) Flächige Beleuchtungsvorrichtung und mit solcher Vorrichtung versehenes Anzeigegerät
DE10258465B4 (de) Beleuchtungsvorrichtung für ein Kennzeichenschild
EP1051582B1 (fr) Systeme d&#39;eclairage
DE602004005768T2 (de) Rücklicht-Beleuchtungssystem und Anzeigevorrichtung
EP0029199A1 (fr) Dispositif d&#39;éclairage en couleurs, par exemple pour la publicité lumineuse, l&#39;éclairage extérieur et intérieur
DE10319274A1 (de) Lichtquelle
EP1555477B1 (fr) Luminaire comprenant des sources lumineuses de différentes couleurs ainsi qu&#39;un guide de lumière plan pour émettre un mélange de lumières
EP2130072A2 (fr) Système comprenant une puce semi-conductrice et une couche de guidage de la lumière
DE102007029659A1 (de) Hintergrundbeleuchtungseinheit und Anzeigevorrichtung mit der Hintergrundbeleuchtungseinheit
EP2219056A1 (fr) Plaque dotée d&#39;au moins un champ lumineux intégré
EP2561270A1 (fr) Source de lumière plane
DE102012106456A1 (de) Eine weißes Licht aussendende Vorrichtung, sowie Anzeigegerät und Beleuchtungsgerät, die diese nutzen
DE102004046256A1 (de) Oberflächenleuchtsystem
EP2238487A2 (fr) Dispositif de conduction optique, dispositif d&#39;éclairage pourvu d&#39;un tel dispositif de conduction optique, et procédé de fabrication d&#39;un tel dispositif de conduction optique
EP2845233A1 (fr) Module de led
EP1379742A1 (fr) Meuble urbain presentant une vitre eclairee
EP2556287B1 (fr) Arrangement d&#39;émission de lumière comprenant plusieurs sources de lumière et un élément diffuseur de lumière transparent
DE202006020673U1 (de) Wiedergabevorrichtung
DE102014110097A1 (de) Leuchtmodul und dieses verwendende Beleuchtungseinrichtung
DE202012100806U1 (de) Hoch farbgesättigter Lichtmodulator und Beleuchtungsvorrichtung dafür
DE10164033B4 (de) Optoelektronisches Bauelement mit einer Mehrzahl von Lichtquellen
DE102007026795A1 (de) Beleuchtungsvorrichtung sowie Flüssigkristall-Bildschirm mit einer solchen Beleuchtungsvorrichtung
DE102007025573A1 (de) Flüssigkristall-Anzeigefeld

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20100506

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20140303

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20140501