EP3559544A1 - Structure en couches comportant des symboles pouvant être éclairés et son utilisation - Google Patents

Structure en couches comportant des symboles pouvant être éclairés et son utilisation

Info

Publication number
EP3559544A1
EP3559544A1 EP17822651.0A EP17822651A EP3559544A1 EP 3559544 A1 EP3559544 A1 EP 3559544A1 EP 17822651 A EP17822651 A EP 17822651A EP 3559544 A1 EP3559544 A1 EP 3559544A1
Authority
EP
European Patent Office
Prior art keywords
layer
light
symbol
layer structure
structure according
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Withdrawn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
EP17822651.0A
Other languages
German (de)
English (en)
Inventor
Roland KÜNZEL
Heinz Pudleiner
Michael Glässer
Konstantin LEONHARDT
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.)
Covestro Deutschland AG
Original Assignee
Covestro Deutschland AG
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 Covestro Deutschland AG filed Critical Covestro Deutschland AG
Publication of EP3559544A1 publication Critical patent/EP3559544A1/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Withdrawn legal-status Critical Current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
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
    • G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0058—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
    • G02B6/0081—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
    • G02B6/0093—Means for protecting the light guide

Definitions

  • the present invention relates to a layer construction for an illuminable belt comprising or consisting of the following layers in the order given:
  • the invention further relates to an illuminable Dekoreiement with such a layer structure, as well as the use of the decorative element and the layer structure.
  • a lightguide plate for a front-light type illumination unit in liquid crystal display systems comprising an alicyclic structure-containing polymer resin, and at least one of the main planar surfaces has a thin projection-and-recess shape with reflection function on.
  • the object of the present invention is to provide a ceremoninclement for a bclcuchtbarcs decorative element that summarizes at least one symbol that can be made visible by illumination, and for a viewer only appears when it by at least one specially attached Lcuchtm ittcl is illuminated.
  • the surface element should have a high flexibility, for example, to be able to be mounted on uneven substrates.
  • the object is achieved by a layer structure for an illuminable and flexible operating element to assend or consisting of the following layers in the specified
  • Sequence A) a light-conducting surface element in which light from a light source via at least one of its abutting edges can be coupled, wherein the light within the photoconductive surface element propagates laterally and is emitted at least in sections on its the symbol layer facing flat side;
  • the symbol layer of the layer structure according to the invention has, at least in partial areas, a symbol in the form of an ornament, printing, painting or the like, referred to below as a symbol.
  • the symbol in particular the imprint, may, for example, be a company emblem, a vehicle type or vehicle class designation, a functional status description such as "on” or "off", a text or a purely decorative pattern.
  • the symbol can be displayed both positively and negatively, which means that the symbol is either self-illuminating when lit or its surroundings are lit while the symbol remains dark. If the symbol is a print, it is preferably applied by screen printing or other decorating methods, more preferably by screen printing. In a further preferred embodiment, the screen printing is transparent.
  • the symbol of the symbol layer by a variety of decoration methods, such as IMD (In Mold Decoration), IML (In Mold Labeling), FIM (Film Insert Molding) or screen printing, generated.
  • decoration methods such as IMD (In Mold Decoration), IML (In Mold Labeling), FIM (Film Insert Molding) or screen printing, generated.
  • other printing methods such as e.g. the pad printing or a painting process can be used.
  • the symbol layer can also be produced by a lamination process.
  • the layer structure according to the invention comprises at least one light-conducting surface element into which light from a first light source Li via at least one of its abutting edges can be coupled.
  • This surface element is, for example, an optical waveguide film made of polycarbonate or PMMA.
  • the light propagates within the layer, whereby it is thrown back for the most part between the interfaces of the main surfaces by total reflection.
  • the light-guiding surface element the light is emitted at least in sections on its flat side facing the symbol layer. That can for example be achieved in that the surface element has nanostructures in this area. Likewise, the nanostructures may be present on the opposite or on both flat sides.
  • the nanostructures can be produced by punching, V-cutting, embossing or by laser engraving. Such films are sold, for example, by the company Nicrotek.
  • the light-conducting surface element thus preferably has nanostructures on the basis of which the light is emitted at least in sections on the flat side of the light-conducting surface element facing the symbol layer. A high image sharpness and a clear image are achieved by the microstructures according to the invention and by the nanostructures according to the invention.
  • the symbol layer can be applied to the light-conducting surface element, the transparent intermediate layer or a cover layer.
  • the cover layer serves, for example, as a printing substrate for the symbol layer. In this case, too, the symbol layer can represent an independent layer, for example a symbol punched out of an impermeable foil. If the second symbol layer represents a self-contained layer, the cover layer may be omitted.
  • the transparent intermediate layer, the light-conducting surface element and / or the cover layer in the range of 400 nm to 800 nm has a transmission of at least 75%, determined according to ISO 13468 at a thickness of 1 mm, preferably at least 85%. , and a haze of at most 10%, determined according to ASTM D l 003 at a layer thickness of 1 mm, preferably of at most 5%.
  • the layer construction according to the invention as a rule, all the layers are fixedly arranged and connected to one another.
  • the light-conducting surface element is not glued to the overlying surface, at least in the area from which the laterally coupled-in light is emitted so that the micro- and / or nanostructures on its surface are not deactivated.
  • the photoconductive surface element, the transparent intermediate layer, the protective layer and / or the cover layer can be constructed from a thermoplastic, which preferably consists of polycarbonate, polyacrylate, polymethacrylate, cycloolefin copolymers, polysulfones, polyesters, polycarbonate / polyester blends, polycarbonate / Polycyclohexylmethanolcyclohexanedicarboxylate, or polycarbonate / PBT, more preferably polycarbonate.
  • a thermoplastic which preferably consists of polycarbonate, polyacrylate, polymethacrylate, cycloolefin copolymers, polysulfones, polyesters, polycarbonate / polyester blends, polycarbonate / Polycyclohexylmethanolcyclohexanedicarboxylate, or polycarbonate / PBT, more preferably polycarbonate.
  • the respective layers of the layer structure are all transparent or translucent thermoplastics suitable.
  • polyacrylates polymethacrylates (PMMA, commercially available as Plexiglas TM from Röhm), cycloolefin copolymers (COC, commercially available as Topas TM from Ticona, or as Zenoex TM from Nippon Zeon or Arton TM from Japan Synthetic Rubber), copolyesters (commercially available as Tritan TM from Eastman Chemical or as Ecozen TM from SK Chemicals), polysulfones (commercially available as Ultrason TM from BASF or Udel TM from Solvay), polyester, such as Polyether terephthalate (PET) or polyethylene naphthalate (PEN), polycarbonate (PC), aliphatic polycarbonate (commercially available as Durabio TM from Mitsubishi Chemical Corp.), polycarbonate / polyester blends, e.g.
  • PC / PET polycarbonate / polycyclohexylmethanolcyclohexanedicarboxylate (PCCD, commercially available as Xylex TM from Sabic IP).
  • PCCD polycyclohexylmethanolcyclohexanedicarboxylate
  • the layers independently of one another by polycarbonates or copolycarbonates based on diphenols, poly- or copolyacrylates, poly- or copolymers of copolymethacrylates, poly- or copolymers with styrene, thermoplastic polyurethanes, polyoefins, poly- or copolycondensates of terephthalic acid or naphthalenedicarboxylic acid or mixtures thereof, preferably polycarbonates or copolycarbonates based on diphenols, poly- or copolyacrylates, poly- or Copolymethacrylate, poly- or copolycondensates of terephthalic acid or naphthalenedicarboxylic acid or mixtures thereof. Particular preference is given to using polycarbonates.
  • Suitable polycarbonates are all known polycarbonates, these may be homopolycarbonates, copolycarbonates and thermoplastic polyesters. These preferably have medium Molecular weights M w of from 18,000 to 40,000 g / mol, preferably from 22,000 to 36,000 g / mol and in particular from 24,000 to 33,000 g / mol, determined by measuring the relative solution viscosity in dichloromethane or in mixtures of equal amounts by weight of phenol o-dichlorobenzene calibrated by light scattering , For the preparation of polycarbonates, see, for example, "Schnell, Chemistry and Physics of Polycarbonates, Polymer Reviews, Vol. 9, Interscience Publishers, New York, London, Sydney 1964", and "DC PREVORSEK, B.
  • Preferred starting compounds are bisphenols of the general formula HO-R-OH, where R is a divalent organic radical of from 6 to 30 carbon atoms containing one or more aromatic groups.
  • Such compounds are bisphenols belonging to the group of dihydroxybiphenyls, bis (hydroxyphenylalkenes, indanebisphenols, bis-hydroxyphenyl ether, bis (hydroxyphenyl) sulfones, bis (hydroxyphenyl) ketones and oc, a'-bis (hydroxyphenyl) -diisopropylbenzoie.
  • Particularly preferred bisphenols which belong to the abovementioned linking groups are bisphenol-A, tctraalkyl, bi-bis-I - A, (Bisphenol M),
  • Carbonic acid compounds in particular phosgene, or reacted in the melt transesterification with diphenyl carbonate or dimethyl carbonate.
  • Polyester carbonates are preferably obtained by reacting the abovementioned bisphenols, at least one aromatic dicarboxylic acid and optionally carbonic acid equivalents.
  • aromatic dicarboxylic acids are phthalic acid, terephthalic acid, isophthalic acid, 3,3 'or 4,4'-diphenyldicarboxylic acid and benzophenone dicarboxylic acids.
  • a portion, up to 80 mole%, preferably from 20 to 50 mole%, of the carbonate groups in the polycarbonates may be replaced by aromatic dicarboxylic acid ester groups.
  • Inert organic solvents used in the interfacial process include, for example, dichloromethane, the various dichloroethanes and chloropropane compounds, tetrachloromethane, trichloromethane, chlorobenzene and chlorotoluene, preferably chlorobenzene or dichloromethane or mixtures of dichloromethane and chlorobenzene.
  • phase interface reaction can be accelerated by catalysts such as tertiary amines, in particular N-alkylpiperidines or onium salts.
  • catalysts such as tertiary amines, in particular N-alkylpiperidines or onium salts.
  • tributylamine, triethylamine and N-ethylpiperidine are used.
  • the catalysts c mentioned in DE 4 238 123 A1 are preferably used.
  • the polycarbonate can be deliberately and controlled branched by the use of small amounts Verwe liger.
  • Some suitable branching agents are: phloroglucinol, 4,6-dimethyl-2,4,6-tri- (4-hydroxyphenyl) -hepten-2; 4,6-dimethyl-2,4,6-tri- (4-hydroxyphenyl) heptane; 1, 3,5-tri- (4-hydroxyphenyl) benzoi; 1,1,1-tris (4-hydroxyphenyl) -ethane; Tri- (4-hydroxyphenyl) -phosphinylmethane; 2,2-bis [4,4-bis (4-hydroxyphenyl) -cyclohexyl] -propane; 2,4-bis (4-hydroxyphenyl isopropyl) phenol; 2,6-bis- (2-hydroxy-5'-methyl-benzyl) -4-methyl phenol; 2- (4- Hydroxyphenyl) -2- (2,4-dihydroxyphenyl) propane; Hexa- (4-
  • phenols such as phenol, alkyiphenols such as cresol and 4-tert-butylphenol, chlorophenol, bromophenol, cumylphenol or mixtures thereof are preferably used in amounts of 1 to 20 mol%, preferably 2 to 10 mol% per mole of bisphenol. Preference is given to phenol, 4-tert-butylphenol or cumylphenol.
  • Chain terminators and branching agents may be added separately or together with the bisphenol to the syntheses.
  • polycarbonates of the multilayer product according to the invention are the homopolycarbonate based on bisphenol A, the homopolycarbonate based on l, l-bis (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane and the copolycarbonates based on the two monomers bisphenol A. and 1, 1-bis (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane.
  • the homopolycarbonate based on bisphenol A is particularly preferred.
  • the polycarbonate may contain stabilizers.
  • Suitable stabilizers are, for example, phosphines, phosphites or Si-containing stabilizers and further compounds described in EP 0 500 496 A1. Examples which may be mentioned are triphenyl phosphites, diphenylalkyl phosphites, phenyldiaicyl phosphites, tris (nonyiphenyl) phosphite, tetrakis (2,4-di-tert-butylphenyi) -4,4'- biphenylenediphosphonite and triarylphosphite. Particularly preferred are triphenylphosphine and tris (2,4-di-tert-butylphenyl) phosphite.
  • the polycarbonate may contain from 0.01 to 0.5% by weight, based on the total weight of the polycarbonate, of esters or partial esters of monosubstituted to hexahydric alcohols, especially of glycene, pentaerythritol or guerbet alcohols.
  • Monohydric alcohols are, for example, stearyl alcohol, paimityl alcohol and guerbeta alcohols.
  • a dihydric alcohol is glycol.
  • a trivalent alcohol is, for example, glycerine.
  • Native alcohols are, for example, pentaerythritol and mesoerythritol.
  • Five-chain alcohols are, for example, arabitol, ribitol and xy 1-it.
  • Six-valent alcohols are, for example, mannitol and glutathione. (Sorbitol) and Dulcit.
  • the esters are preferably the monoesters, diesters, triesters, tetraesters, pentaesters and hexaesters or mixtures thereof, in particular random mixtures of saturated, aliphatic C 10 to C 36 monocarboxylic acids and, if appropriate, hydroxy monocarboxylic acids, preferably with saturated, aliphatic C 14 to C32 monocarboxylic acids and optionally hydroxy monocarboxylic acids.
  • the commercially available fatty acid esters in particular of pentaerythritol and of glycerol, may contain up to 60% by weight of different partial esters as a result of their manufacture.
  • Saturated, aliphatic monocarboxylic acids of 10 to 36 carbon atoms are, for example, capric acid, lauric acid, myristic acid. Palm itinklare, stearic acid, hydroxystearic acid, Arachinklarc, behenic acid, lignoceric acid, cerotic acid and montan acids.
  • Preferred saturated, aliphatic monocarboxylic acids having 14 to 22 carbon atoms are, for example, myristic acid, palmic acid, stearic acid, hydroxystearic acid, arachidic acid and behenic acid. Particularly preferred are saturated aliphatic monocarboxylic acids such as palmitic acid, stearic acid and hydroxystearic acid.
  • the saturated, aliphatic C 20 to C 36 -carboxylic acids and the fatty acid esters are either known from the literature or can be prepared by methods known from the literature.
  • pentaerythritol fatty acid esters are those of the particularly preferred monocarboxylic acids mentioned above.
  • Particularly preferred are esters of pentaerythritol and glycerol with Stearic acid and palmitic acid.
  • the structure according to the invention has a protective layer.
  • a protective layer This is for example a scratch-resistant coated polycarbonate film, wherein the coating can be acrylate-based.
  • the protective layer can also consist only of the coating which is applied to an underlying layer.
  • the coating can be applied by methods such as painting, dip coating, direct coating or direct skinning with the appropriate coating.
  • the transparent intermediate layer, the light-conducting surface element and / or the cover layer should have the highest possible transparency.
  • this is understood to mean that the corresponding components in the range from 400 nm to 800 nm have a transmission of at least 85%, determined to ISO 13468 at a thickness of 4 mm, preferably at least 90%, and a haze of at most 5 %, determined according to ASTM D l 003 at a layer thickness of 4 mm, preferably of at most 4%.
  • the transparent intermediate layer can preferably be produced by casting or back-injection.
  • Foil is preferably used for the cover layer.
  • the layers independently of one another have the following thicknesses:
  • Interlayer of 100 to 1000 ⁇ m, preferably of 250 to 500 ⁇ m, has a conductive surface element of 0.075 to 1000 ⁇ m, preferably of 250 to 750 ⁇ m,
  • Cover layer from 100 to 1,000 ⁇ m. preferably from 250 to 500 ⁇ m, as well
  • Another object of the present invention relates to an illuminable decorative element to summarize a layer structure according to the invention and at least one light source, which is preferably designed as a light emitting diode, in particular as a laser diode, filament lamp or gas discharge lamp.
  • the illuminable Dckorelement is preferably operable in at least two Bctriebs / urisen, wherein in a first operating / ustand a light source lights and in a second operating state, the Lichtquel le is not lit.
  • a plurality of actuators for example a switch, can be displayed in an aesthetically pleasing manner in a simple manner, without requiring the use of liquid crystal units or the like for this purpose.
  • Eg egg ne complicated electronics ebenfal ls is not erforderl for the operation of the inventive luminous decorative element due to its egg nfachen structure.
  • the illuminable decorative element according to the invention has a high flexibility on it, which also makes it possible to realize non-planar structures, such as vaults.
  • the invention further relates to a method for the produc- tion of a layer structure according to the invention, in which
  • Another object of the invention betri fft the use of a layer structure according to the invention as a decorative element, especially in the automotive sector, for office supplies and electronic devices, especially computers and Mobilfunkclefonc.
  • the invention relates to the use of a decorative element according to the invention as a component in an electrical switch.
  • the invention relates to a layer structure (S) for a lightable control element comprising or ordering from the following layers in the stated sequence:
  • the invention relates to a layer structure according to embodiment 1, characterized in that the second symbol layer (1) on the photoconductive surface element (3), the transparent intermediate layer (2) or a cover layer (5) is applied.
  • the invention relates to a layer structure according to one of the preceding embodiments, characterized in that the transparent intermediate layer (2), the light-conducting surface element (3) and / or the covering layer (5) in the region from 400 nm to 800 nm, a transmittance of at least 85%, best imt ISO 13468 at a thickness of 4 mm, preferably, at least 90%, and a haze of at most 5%, determined according to ASTM D l 003 at a layer thickness of 4 mm, preferably of at most 4%, iron.
  • the invention relates to a layer structure according to one of the preceding embodiments, characterized in that the all layers are fixedly arranged on one another and / or connected to one another.
  • the invention relates to a layer structure according to one of the preceding embodiments, characterized in that the light-conducting surface element (3) nanostructures /, on the basis of which the light on the symbol layer (1) facing flat side of the photoconductivemonyneiements (3) at least partially emitted becomes.
  • the invention relates to a layer structure according to one of the preceding embodiments, characterized in that the light-conducting surface element (3), the transparent intermediate layer (2), the protective layer (6) and / or the cover layer (8) consists of a Thermoplastics are preferably composed of polycarbonate, polyacrylate, Polymethacryiat, Cyclooiefin copolymers, polysulfones, polyesters, polycarbonate polyester blends, polycarbonate / polycyclohexylmethanolcyclohexandicarboxyiat, or polycarbonate / PBT, more preferably selected from polycarbonate.
  • a Thermoplastics are preferably composed of polycarbonate, polyacrylate, Polymethacryiat, Cyclooiefin copolymers, polysulfones, polyesters, polycarbonate polyester blends, polycarbonate / polycyclohexylmethanolcyclohexandicarboxyiat, or polycarbonate / PBT, more
  • the invention relates to a layer structure according to one of the preceding embodiments, characterized in that the symbol of the symbol layer (1) by a printing process, in particular screen printing, laminating, painting, IMD (In Mold Decoration), IML (In Mold Labcling) or FIM (Fi im Insert Molding) can be generated.
  • a printing process in particular screen printing, laminating, painting, IMD (In Mold Decoration), IML (In Mold Labcling) or FIM (Fi im Insert Molding) can be generated.
  • the invention relates to a layer structure according to one of the preceding embodiments, characterized in that the transparent intermediate layer (2) can be produced by casting behind or injection molding.
  • the invention relates to a layer structure according to one of the preceding embodiments, characterized in that the cover layer (8) is a film.
  • the invention relates to a layer structure according to one of the preceding embodiments, characterized in that the layers independently of one another have the following thicknesses:
  • Symboilic from 2 to 80 ⁇ ⁇ , preferably, from 1 2 to 50 ⁇ ,
  • Interlayer (2) of 100 to 1000 ⁇ ⁇ . preferably from 250 to 500 ⁇ m,
  • LIH conductive surface element (3) from 0.075 to 1000 ⁇ m. preferably from 250 to 750 ⁇ m.
  • Cover layer (5) of 100 to 1,000 ⁇ m, preferably of 250 to 500 ⁇ m, as well as
  • the invention relates to an illuminable decorative element comprising a layer structure (S) according to one of embodiments 1 to 10 and at least one light source (4), which are preferably designed as a light emitting diode, in particular as a laser diode, Glühfadcnlampc or gas discharge lamp, wherein the decorative element is preferably operable in at least two operating states, wherein in a first operating state, a light source (4) lights and in a second operating state, the light source (4) does not light.
  • a layer structure (S) according to one of embodiments 1 to 10 and at least one light source (4), which are preferably designed as a light emitting diode, in particular as a laser diode, Glühfadcnlampc or gas discharge lamp, wherein the decorative element is preferably operable in at least two operating states, wherein in a first operating state, a light source (4) lights and in a second operating state, the light source (4) does not light.
  • the invention relates to a method for producing a
  • the invention relates to the use of a layer structure according to one of the embodiments 1 to 10 as a decorative element, in particular in Automotive sector, for office supplies and electronic devices, in particular computers and mobile phones.
  • the invention relates to the use of a decorative element according to embodiment 1 1 as a component in an electrical switch.
  • Fig. L an inventive illuminable decorative element in a lateral sectional view.
  • Fig. 1 an inventive illuminable decorative element is shown in lateral sectional representation.
  • the delta element comprises a layer structure S according to the invention and a light source 4.
  • the layer structure S according to the invention orders from the following layers in the stated sequence:
  • a light-conducting surface element 3 is coupled into the light from the light source 4 via one of its abutting edges, wherein the light propagates laterally within the light-emitting surface element 3 and is cut-out on its flat side facing away from the symbol layer 1, this region being indicated by arrows, indicating the light radiation;
  • the transparent intermediate layer 2 is connected to the non-aligning surface element 3 only in the region in which the light is not emitted from the flat side of the light-emitting surface element 3.
  • the nanostructures on the surface of the light-guiding surface element 3 are filled by the adhesive, as a result of which the light emission in this area is greatly reduced or possibly even completely lost.
  • the light is coupled by means of the light source 4 of the light-conducting surface element 3 facing flat side of the first symbol layer 1.
  • Light-sensitive surface element 3 Makrofol TM LM 907 from Covestro AG, Germany, with a surface embossing for light extraction, manufactured by the Fa. Nicrotek, PR China
  • Light source 4 LED, light color white transparent cover layer 5: Makrofol TM SR 908 1 -4 250 ⁇ , PC / PMMA
  • the polycarbonate layer is 205 ⁇ thick, the PMMA layer 45 ⁇ m thick.
  • Protective Layer 6 PMMA based solvent containing lacquer system l-FHC 338,
  • the illuminable decorative element is operable in several operating states.
  • the light source 4 is operated in a ei most operating state. In this state is on the
  • the Lichtquel le 4 is turned off, whereby the symbol of the first symbol layer 1 from the outside is not or only slightly visible.
  • several operating states such as a switch, are displayed in an aesthetically pleasing manner, without requiring the use of liquid crystal units or the like.
  • a complicated electronics is also not required for the operation of the illuminable decorative element according to the invention due to its simple structure.
  • the flexibility of the layer structure according to the invention also allows the realization of non-planar structures as well as an attachment of the layer structure to non-planar substrates. As a result, for example, illuminated arched structures or switches can be realized, which are difficult or impossible to be realized by remplissigkristailan Attachesysteme.
  • the production of the layer structure S is carried out as follows:
  • the transparent cover layer 5 is coated with a protective layer 6 in the coating process.
  • a Rolienbe Anlagenungs vide is used.
  • the film with the coating represents an intermediate product, ie a finished semi-finished product, which is used in the further process.
  • the composite of transparent cover layer 5 and protective layer 6 is then provided by means of screen printing with a transparent printing as a symbol layer 1.
  • the symbol layer 1 is weak to barely visible in the off state of the LED as a homogeneous image.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Laminated Bodies (AREA)

Abstract

La présente invention concerne une structure en couches (S) pour un élément de commande pouvant être éclairé, comprenant ou constituée des couches suivantes, dans l'ordre indiqué : A) un élément plat (3) conduisant la lumière dans lequel de la lumière provenant d'une source de lumière (4) peut être injectée par le biais d'au moins l'un de ses rebords, la lumière se propageant latéralement à l'intérieur de l'élément plat (3) conduisant la lumière et étant émise au moins dans certaines portions sur son côté plat faisant face à la couche de symbole (1) ; B) au besoin une couche intermédiaire transparente (2) ; C) une deuxième couche de symbole (1) comportant au moins un symbole ; D) au besoin une couche de protection (6). L'invention concerne en outre la fabrication d'une telle structure en couches (S), un élément décoratif pouvant être éclairé doté d'une telle structure en couches (S) et l'utilisation de l'élément décoratif et de la structure en couches (S).
EP17822651.0A 2016-12-22 2017-12-18 Structure en couches comportant des symboles pouvant être éclairés et son utilisation Withdrawn EP3559544A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP16206167 2016-12-22
LU100064 2017-02-09
PCT/EP2017/083356 WO2018114828A1 (fr) 2016-12-22 2017-12-18 Structure en couches comportant des symboles pouvant être éclairés et son utilisation

Publications (1)

Publication Number Publication Date
EP3559544A1 true EP3559544A1 (fr) 2019-10-30

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EP17822651.0A Withdrawn EP3559544A1 (fr) 2016-12-22 2017-12-18 Structure en couches comportant des symboles pouvant être éclairés et son utilisation

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DE102021121853A1 (de) * 2021-08-24 2023-03-02 Lisa Dräxlmaier GmbH Beleuchtungseinrichtung sowie verfahren zum herstellen einer beleuchtungseinrichtung

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KR20030075153A (ko) 2001-01-31 2003-09-22 제온 코포레이션 도광판 및 조명유닛
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DE102014112470B4 (de) * 2014-08-29 2018-06-21 Lisa Dräxlmaier GmbH Ausstattungsteil mit leuchtender sichtseite

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