WO2004088365A1 - Plaque minéralogique de véhicule luminescente - Google Patents

Plaque minéralogique de véhicule luminescente Download PDF

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Publication number
WO2004088365A1
WO2004088365A1 PCT/DE2004/000710 DE2004000710W WO2004088365A1 WO 2004088365 A1 WO2004088365 A1 WO 2004088365A1 DE 2004000710 W DE2004000710 W DE 2004000710W WO 2004088365 A1 WO2004088365 A1 WO 2004088365A1
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WO
WIPO (PCT)
Prior art keywords
self
license plate
layer
binder layer
illuminating
Prior art date
Application number
PCT/DE2004/000710
Other languages
German (de)
English (en)
Inventor
Lothar Wurmbach
Original Assignee
Erich Utsch 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
Priority claimed from DE10356297A external-priority patent/DE10356297A1/de
Application filed by Erich Utsch Ag filed Critical Erich Utsch Ag
Publication of WO2004088365A1 publication Critical patent/WO2004088365A1/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/12—Reflex reflectors
    • G02B5/126—Reflex reflectors including curved refracting surface
    • G02B5/128—Reflex reflectors including curved refracting surface transparent spheres being embedded in matrix
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
    • B60Q1/56—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for illuminating registrations or the like, e.g. for licence plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/10—Registration, licensing, or like devices

Definitions

  • the present invention relates to a self-illuminating license plate with a carrier plate onto which a retroreflective film "is laminated on the front, which is also self-illuminating in addition to its retroreflective property.
  • Retroreflective sheeting for license plates in a large number of countries is required by their respective national approval regulations. Because of their retroreflectivity, retroreflective vehicle license plates have a high level of visibility under retroreflective conditions. On the other hand, there is room for improvement in situations in which the observer has no external light source, the emitted light of which is reflected by the retroreflective license plate. Such a situation arises, for example, for pedestrians who do not have their own light source and are trying to read the license plate of a passing motor vehicle in poor lighting conditions.
  • lighting devices for license plates are generally prescribed, which are firmly connected to the vehicle and are intended to illuminate the license plate so that it is easy to read even under non-retroreflective conditions.
  • self-illuminating license plates are known from the prior art which, to increase the recognizability of the license plate legend under non-retroreflective conditions, the carrier plate of the license plate with a self-illuminating film, which can be excited, for example, using the electroluminescent effect to emit light , The license plate legend is then printed on this self-illuminating film, so that it stands out against the bright, self-illuminating background of the self-illuminating film.
  • a license plate is known, for example, from the motor vehicle offered by the manufacturer Volkswagen AG under the model name "PHAETON", which can be equipped with such a self-illuminating ' license plate on its rear if desired.
  • This film is based on highly retroreflective prismatic elements, which are arranged on the back of a plastic film.
  • a high refractive index jump is required, which typically occurs during the transition from transparent polymer materials to air.
  • an electroluminescent one Layer system arranged, which shines through the back of the retroreflective plastic layer with light.
  • a disadvantage of the self-luminous retroreflective film mentioned is, on the one hand, its relatively complex structure, which makes the film costly to produce, on the other hand, the film also proves to be sensitive to mechanical deformations, as is typical when introducing an embossed number plate legend into a license plate occur.
  • the object of the present invention is therefore to provide a motor vehicle license plate which, on the one hand, has an increased detectability under non-retroreflective conditions, but on the other hand does not show a significantly impaired detectability under retroreflective conditions.
  • An inventive self-illuminating license plate has a carrier plate, for example made of metal, on the front of which a self-illuminating retroreflective foil is laminated.
  • the film comprises a first transparent polymeric binder layer, which in turn is covered on the back with an optical reflection layer.
  • a plurality of transparent balls which are arranged essentially in one plane, are partially embedded, which can be made of glass or a transparent plastic, for example.
  • partially embedded is to be understood to mean that the balls are not completely enclosed by the first binder layer.
  • Retroreflective sheeting applied a second binder layer that can, but does not have to, completely cover the spheres partially embedded in the first binder layer.
  • the second binder layer is doped with self-illuminating particles.
  • the thickness of the first binder layer is selected such that more than 50% of the cross-sectional area of the balls on the underside is covered by the first binder layer. In this way, the transparent balls are enclosed relatively strongly by the first binder layer. This has the direct consequence that light incident on the retroreflective film is reflected back at a variety of angles of incidence.
  • the thickness of the second binder layer which is doped with self-luminous particles and has an increased optical absorption, can thereby be limited.
  • the second binder layer is essentially only arranged in the spaces between the balls arranged in one plane, so that the second binder layer does not completely enclose the balls on the upper side.
  • the second binder layer can be applied to the first binder layer in the form of a thin film in the spaces between the balls.
  • a particularly low absorption of the retroreflective sheeting with simultaneous maximization of the self-illuminating effect results if the second binder layer is arranged essentially in the equatorial plane of the spheres.
  • the thickness of the second binder layer must be such that there is sufficient luminance of the self-illuminating particles for the desired application.
  • the required thickness of the second binder layer depends on the selected self-illuminating particles and the other conditions of the retroreflective self-illuminating film.
  • the second binder layer arranged essentially in the equatorial plane of the balls has such a thickness that both the top and the bottom cross-sectional area of the balls essentially, but at least to at least 50, when looking at the retroreflective sheeting % remains uncovered by the second binder layer.
  • the thickness of the first binder layer must also be selected accordingly.
  • the retroreflectivity of the film thus remains essentially unchanged due to the introduction of the second binder layer over a relatively large angular range of the incident radiation. Only at such an angle of incidence of the incident radiation, which due to the film geometry results in the radiation to be reflected passing through the second binder layer, does the retroreflectivity weaken.
  • the second binder layer in which the partially weather-sensitive self-illuminating particles are arranged, is overlaid with a third transparent binder layer such that the layer system consisting of the first, second and third binder layers completely encloses the balls.
  • a third transparent binder layer such that the layer system consisting of the first, second and third binder layers completely encloses the balls.
  • those particles which show electroluminescence are used as self-luminous particles. This means that they are made to glow by applying an electrical (alternating) field.
  • ZnS phosphor particles for example, show a high luminous efficiency, in which even low electric field strengths and low frequencies in the polarity change of the electric field enable a high luminous efficiency.
  • fluorescent particles are used as self-luminous particles, ie particles which have an afterglow effect after exposure to ambient light.
  • fluorescent particles with a short afterglow duration can be used, which can be used, for example, to produce a license plate that has a self-illuminating effect when driving through short tunnels without having to switch on the vehicle lights.
  • luminescent particles which have a long-lasting afterglow effect which is referred to below as luminescence which can last for hours.
  • License plates according to the invention which are provided with such luminescent particles in the second binder layer, have the advantage, for example, that the license plates of parked vehicles can also be read in the dark in a simple manner, without the need for an external light source .
  • a self-illuminating license plate according to the invention is able, within the scope of the applicable national approval regulations, to replace the embossed retroreflective license plates that are widely used today without having to change the approval regulations if the foil applied to the front of the carrier plate can be embossed is.
  • it is essential to pay attention to the selection of suitable materials for the first, second and possibly third binder layer, so that these layers survive a mechanical stamping process without damage.
  • the second binder layer can be based, for example, on a polymeric material as the matrix material, into which the self-luminous particles are introduced in a suitable manner in the manufacturing process.
  • the matrix material great mechanical deformability must also be ensured.
  • polymer materials are also particularly suitable here as matrix materials.
  • the self-luminous license plate according to the invention preferably has an electrically conductive optical reflection layer.
  • a transparent, electrically conductive cover electrode layer is arranged above the second binder layer or possibly the optional third binder layer.
  • the cover electrode layer forms a capacitor together with the reflection layer.
  • This capacitor is intended to generate a largely homogeneous electric field over the entire surface of the self-illuminating license plate in which the second binder layer with its electroluminescent particles embedded therein is ordered.
  • Homogeneous means a uniformity on a macroscopic scale (approx. 1 mm and larger). On the scale of the balls, the electric field can be very inhomogeneous.
  • the distance between the rear optical reflection layer and the top electrically conductive cover electrode layer can be kept very small, which immediately results in high field strengths in the interior of the capacitor formed in this way and thus has a positive effect on the luminous efficacy of the self-illuminating license plate effect.
  • the electrical alternating field required for electroluminescence can also be generated by a capacitor whose lower (i.e. oriented towards the carrier plate) electrode is realized by an additional electrically conductive layer which does not coincide with the optical reflection layer. It is conceivable to use an electrically conductive transparent polymer for the first binder layer as an electrode.
  • the i.A. Metallic carrier plate can serve as an electrode if the optical reflection layer has sufficient electrical permeability.
  • the cover electrode layer consists of an electrically conductive polymer material.
  • electrically conductive polymers are available to the person skilled in the art which, in addition to high electrical conductivity, have high mechanical strength and good weather resistance and at the same time the lowest production costs.
  • ITO indium tin oxide
  • these ITO layers have the disadvantage of high mechanical sensitivity and, because of their production process, which requires the layer to be sputtered on, are relatively expensive to produce.
  • the consistent use of polymeric materials for the first, second and possibly third binder layer and the cover electrode layer improves the mechanical strength of the film of the license plate according to the invention and thus increases the stampability of the license plate according to the invention.
  • the third binder layer which primarily serves to seal the second binder layer, is simultaneously designed as an electrically conductive, transparent cover electrode layer. This in turn has the advantage that the distance between the electrodes of the electroluminescent layer system can be kept extremely small, which results in high electric field strengths and thus a high luminous efficacy.
  • an electrically non-conductive insulation layer is arranged between the reflection layer and the carrier plate of the license plate.
  • the insulation layer can be designed as an adhesive layer which is provided for connecting the carrier plate and the film. This adhesive layer can be covered by a protective film before the film is applied to the carrier plate.
  • Another object of the present invention is a motor vehicle license plate system which consists of an electroluminescent vehicle license plate according to the invention which is arranged in a license plate frame.
  • an electrical high-voltage source is arranged in the identification frame and is provided for connection to the capacitor of the electroluminescent layer system formed from the cover electrode layer and the reflection layer.
  • Such a license plate system can be designed in a simple manner so that it cannot be opened by the user of the vehicle, so that the user contacts the license plate for the operation of an electroluminescent license plate in general required high voltage can be safely excluded.
  • such a license plate system makes electrical leads of greater length for the supply of the required high voltage superfluous, so that line losses can be minimized.
  • the film of the motor vehicle license plate has at least two electrodes on the edge, which are provided for connecting an electrical high-voltage source to the cover electrode layer and the reflection layer.
  • the identification frame has contacts which are provided for making electrical contact with the electrodes of the film.
  • the license plate frame is advantageously designed such that an electrically conductive connection between the contacts and the electrodes is formed automatically when the license plate frame is closed with the inventive license plate plate inserted therein.
  • FIG. 5b a top view of the detail from FIG. 5a
  • FIG. 6 a further enlarged section from FIG. 2, from which the beam path results in the case of retroreflection.
  • Figure . 1 shows a cross section through a first exemplary embodiment of a self-illuminating retroreflective license plate. It consists of an embossable carrier plate 2, which can be made of aluminum, for example. A film 3 is laminated onto the front of the carrier plate 2 by means of an adhesive layer 8.
  • the adhesive layer 8 can in particular be a hot-melt adhesive layer which is activated by the action of heat and can be covered by a protective film (not shown in FIG. 1) before the film 3 is laminated on.
  • the film 3 has the following structure:
  • a passivation layer 16 is arranged on the surface of the film 3, which is transparent and has a high mechanical resistance and a high resistance to weathering. It preferably consists of a largely inert, transparent plastic material and serves to encapsulate the layers and components of the film 3 located under the passivation layer 16. Below the passivation layer 16 is one arranged transparent cover electrode layer 7, which has a high electrical conductivity. In particular, an electrically conductive polymer material with high transparency can be used as the material for the cover electrode layer 7. In addition, however, the cover electrode layer 7 can also consist of a layer of ITO (indium tin oxide) which is well known from the prior art and which will generally be sputtered on.
  • ITO indium tin oxide
  • a polymeric material is also preferably used for the third binder layer 17.
  • Transparent balls 5 which can be made of glass, for example, are partially embedded in the third binder layer 17.
  • the balls 5 typically have a size of 50 micrometers and are arranged essentially in one plane. Depending on the manufacturing process of the film 3, this results in a more or less regular arrangement of the balls 5 in a tight ball packing.
  • the second binder layer 9 is arranged essentially in the equatorial plane of the balls 5.
  • This second binder layer 9 serves as a matrix for self-luminous particles 10 embedded in it, such as are used, for example, in the electroluminescent film offered by Durel Corporation, Chandler, Arizona, USA under the name Durel® 3. These self-luminous particles have a microencapsulation that encloses the weather, in particular moisture-sensitive, electroluminescent phosphor particles.
  • materials for the matrix of the second binder layer 9 polymer materials are again possible, which can be in solid as well as in liquid or gel-like form, or in the form of a polymer melt.
  • the fat this second binder layer can be selected to be relatively thin, so that it is in the range from a few micrometers to a few 10 micrometers.
  • the transparent balls 5 are partially embedded in a first binder layer 4, it being possible for the first material of the binder layer 4 to be selected to be the same as the material of the third binder layer 17.
  • a metallic reflection layer 6 is applied, which can consist, for example, of thermally vapor-deposited silver or aluminum of a few 100 nanometers to a few 10 to 100 micrometers thick.
  • both the first binder layer 4 and the reflection layer 6 follow the course of the balls 5, the reflection layer 6 being arranged at a substantially constant, defined distance from the surface of the balls 5.
  • the materials of the first binder layer 4 and the third binder layer 17 and of the transparent spheres 5 have different refractive indices in the visible spectral range, so that they form a lens system.
  • the thickness of the first binder layer 4 is dimensioned such that the focal point which forms when the motor vehicle license plate according to the invention is irradiated with parallel light is essentially on the reflection layer 6.
  • Such an arrangement of the first and third binder layers 4, 17, the balls 5 and the reflection layer 6 is already known from the prior art.
  • Retroreflective foils with a corresponding structure - but without a second binder layer 9 - are widely used today for the production of retroreflective license plates.
  • an insulation layer 8 in the form of an adhesive layer is applied on the back of the reflection layer 6, with the aid of which the film 3 is laminated onto the front surface of the carrier plate 2 in a hot lamination process.
  • a film consisting of an adhesive layer and a metallic reflection layer 6 with transparent cones partially embedded in the first binder layer is, for example, from Avery "Open bead” retroreflective sheeting sold.
  • the metallic and thus electrically conductive reflection layer 6 and the electrically conductive cover electrode layer 7 form a capacitor, in the interior of which a high electrical field can be generated by applying an electrical voltage to the layers mentioned.
  • an electrical alternating voltage of approximately 100-1000 volts, the frequency of which can be, for example, in the range of 100-1000 Hertz
  • a rapidly changing electrical field of high field strength is created in the interior of the capacitor, in particular in the region of the second binder layer 9, which the self-luminous particles 10 enclosed in the second binder layer stimulates intensive glowing.
  • the voltages and frequencies to be used depend on the selection of the self-luminous particles used and on the geometric and electrical conditions in the interior of the capacitor.
  • FIG. 2 shows an enlarged section of the film 3 of the first exemplary embodiment according to FIG. 1.
  • the arrangement of the second binder layer 9 in the equatorial plane of the transparent balls 5 can be clearly seen, the transparent balls 5 and the second binder layer 9 being completely from the first binder layer 4 and the third binder layer 17 are included.
  • This inclusion of the second binder layer 9 can already achieve a good encapsulation of the self-luminous particles 10, which are sensitive to environmental influences, in the second binder layer 9.
  • Figure 3 shows a section of the film 3 of a second embodiment of a self-illuminating license plate according to the invention.
  • the thin second binder layer 9 and the third binder layer 17 are replaced by a single second binder layer 9. der Mrs 9, which is doped with self-luminous particles 10.
  • the transparent balls 5 are completely enclosed by the first binder layer 4 and the second binder layer 9.
  • the further structure of the film 3 corresponds to the structure of the film 3 of the first embodiment.
  • the structure according to the second exemplary embodiment has the advantage of simplified producibility, since a commercially available standard “open bead” film base material can be simply overlaid by means of a second binder layer 9, to which a suitable cover electrode layer 7 and a passivation layer 16 are then applied.
  • This exemplary embodiment is particularly suitable for those matrix materials for the second binder layer 9 which, due to their physical properties, reliably encapsulate the embedded self-luminous particles 10.
  • the self-luminous particles 10 are advantageously added only in such a concentration that the doped matrix material has only a weak absorption, and it is reasonable due to this inevitable absorption when the area of the second binder layer 9 above the transparent balls 5 has only a small thickness, which should preferably be less than 100 micrometers.
  • FIGS. 4a to 4d A production method for producing a film 3 for a third exemplary embodiment of a license plate 1 according to the invention can be seen from FIGS. 4a to 4d.
  • 4 a shows the starting material of the production process, which is an “open bead” material already mentioned.
  • Transparent balls 5 are partially embedded in a first binder layer 4, a metallic reflection layer G being applied on the underside of the first binder layer 4. This in turn is covered on the underside with an insulating hot-melt layer, which serves as an insulation layer 8.
  • the film material is overlaid as shown with a thin layer of liquid matrix material doped with suitable self-illuminating particles 10 to form the second binder layer 9.
  • the viscosity of the matrix material is selected such that the overlaid material primarily runs into the spaces between the transparent balls 5 and, if need be, a thin film forms on the top of the balls 5.
  • the method can be improved by selecting the matrix material for the second binder layer 9 such that it does not or only poorly wets the transparent balls 5.
  • a special coating that changes the wetting properties of the balls 5 can also be applied to the surface of the balls 5.
  • a UV-curing polymer material is used as the matrix material for the second binder layer 9, which is cured in the second process step.
  • FIG. 4c shows the subsequent third method step, in which the second binder layer 9 is directly overlaid with an electrically conductive, transparent polymeric cover electrode layer 7.
  • This cover electrode layer 7 is also applied in the liquid state and cured in the third process step.
  • the cover electrode layer 7 of this exemplary embodiment thus corresponds to the combination of the third binder layer 17 and the cover electrode layer 7 of the first exemplary embodiment.
  • the cover electrode layer 7 is finally covered with a passivation layer 16 consisting of a transparent plastic that is largely insensitive to environmental influences.
  • This passivation layer 16 is also applied in the liquid state and cured in the fourth method step.
  • the composite system which forms the film 3 and is evident from FIG. 4d is then laminated onto a carrier plate by means of a hot lamination process.
  • a license plate 1 has on the one hand a high retroreflectivity and on the other hand a high self-luminosity caused by electroluminescence of the second binder layer 9.
  • it is mechanically highly resilient, in particular stretchable, and is therefore well suited for the realization of license plate plates with mechanically embossed license plate legends that meet the currently applicable national approval regulations.
  • the film composite 3 can be carried, for example, by a further carrier film during its construction, which is peeled off after the film composite 3 has been laminated onto the carrier plate 2.
  • the individual binder layers can be produced by means of casting processes, but production by means of common screen printing techniques is also possible, in particular for the second binder layer 9 doped with self-luminous particles 10.
  • FIGS. 5a and 5d again illustrate the geometric relationships of the second binder layer 9 in the first embodiment.
  • FIG. 5 a shows an enlarged section from the cross section according to FIG. 2.
  • the second binder layer 9 is arranged essentially in the equatorial plane of the transparent balls 5 and is completely covered by the first binder layer 4 (underside) and the third binder layer 17 (top side) included.
  • the thickness of the second binder layer 9 is dimensioned such that, when viewed from the film 3, as can be seen in FIG. 5b, only a small part of the cross-sectional area of the transparent balls 5 is covered by the second binder layer 9.
  • FIG. 5b only a small part of the cross-sectional area of the sphere 5 is covered in the viewing direction shown, which corresponds to the vertical incidence of light, which accounts for well below 50% of the total cross-sectional area.
  • the arrangement of the second binder layer 9 shown essentially in the equatorial plane of the balls 5 and the selected small thickness of the second binder layer 9 make it possible not to significantly reduce the retroreflectivity of the film 3 compared to a comparable non-self-illuminating retroreflective film.
  • the layer structure shown in FIG. 4d can also represent the structure of a film 3 for a license plate according to the invention, which is doped in its second binder layer 9 with luminescent self-luminous particles 10.
  • the layer system consists, starting from its surface, of a transparent passivation layer 16, a transparent third binder layer 17, a second binder layer 9, which partially encloses the transparent balls 5, and on the underside a first binder layer 4, which also partially encloses the transparent balls 5.
  • An optical reflection layer 6 is in turn applied to this first binder layer 4, which does not have to be electrically conductive, but will generally be.
  • a hot-melt layer 8 is again arranged below the reflection layer 6.
  • FIG. 6 finally shows the optical beam path through a film composite 3 according to the first exemplary embodiment in retroreflection.
  • the thickness of the first, second and third binder layers (4, 9, 7) are as in FIG. gur 5 a dimensioned so that the particularly preferred condition results from a combination of subclaims 2, 4 and 5.
  • the reflection angle shown represents the critical angle up to which the retroreflectivity of the film composite 3 shown essentially corresponds to that of a film without (absorbent) second binder layer 9. Only at higher reflection angles does the retroreflected radiation pass through the (absorbing) second binder layer 9 over a short section of its radiation path, which results in a slight weakening of the retroreflection.
  • the applicant expressly reserves the right to claim protection for the film assembly 3 on its own, in addition to the claimed vehicle identification 1 consisting of a film assembly 3 according to the invention which is laminated onto a carrier plate 2.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Vehicle Waterproofing, Decoration, And Sanitation Devices (AREA)

Abstract

L'invention concerne une plaque minéralogique de véhicule luminescente (1) comprenant les éléments suivants : (a) une plaque support (2), (b) une feuille (3) rétroréfléchissante et luminescente, dont la face avant est stratifiée sur la plaque support. L'invention est caractérisée en ce que cette feuille comporte une première couche de liaison (4) transparente, dont le verso est recouvert d'une couche de réflexion optique (6), cette première couche de liaison contenant une pluralité de billes (5) transparentes, disposées pratiquement sur un seul plan et en partie noyées, ainsi qu'une deuxième couche de liaison (9) dont la face supérieure est appliquée sur la première couche de liaison, cette deuxième couche de liaison étant dotée de particules (10) luminescentes.
PCT/DE2004/000710 2003-04-02 2004-04-02 Plaque minéralogique de véhicule luminescente WO2004088365A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10315092 2003-04-02
DE10315092.7 2003-04-02
DE10356297A DE10356297A1 (de) 2003-04-02 2003-11-28 Selbstleuchtendes Kfz-Kennzeichenschild
DE10356297.4 2003-11-28

Publications (1)

Publication Number Publication Date
WO2004088365A1 true WO2004088365A1 (fr) 2004-10-14

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009027387A1 (fr) * 2007-08-27 2009-03-05 Lyttron Technology Gmbh Plaque minéralogique à effet électroluminescent, procédé de fabrication associé
CN101590709A (zh) * 2008-05-27 2009-12-02 鲁毅 实现反光膜凸起结构的封护复合技术的方法
CN103802741A (zh) * 2014-02-17 2014-05-21 银薪舟 一种使汽车外壳3d变色的方法
CN109683222A (zh) * 2019-03-01 2019-04-26 黄山兴伟反光材料有限公司 一种可反光的黑色反光膜及其生产工艺
WO2019179880A1 (fr) * 2018-03-19 2019-09-26 Erich Utsch Ag Affichage rétroréfléchissant et partie caractérisante numérique
DE102005060400B4 (de) * 2004-07-20 2020-12-10 Volkswagen Ag Baueinheit für einen Deckel eines Fahrzeugheckbereiches

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Publication number Priority date Publication date Assignee Title
US2407680A (en) * 1945-03-02 1946-09-17 Minnesota Mining & Mfg Reflex light reflector
WO1993014422A1 (fr) * 1992-01-16 1993-07-22 Stimsonite Corporation Revetement reflechissant photoluminescent
EP0747736A1 (fr) * 1994-12-16 1996-12-11 Nippon Carbide Kogyo Kabushiki Kaisha Feuille retroreflechissante emettant un lumiere lorsqu'elle est irradiee par des rayons ultraviolets
US5988822A (en) * 1997-11-21 1999-11-23 3M Innovative Properties Company Luminous retroreflective sheeting and method for making same
WO2002023509A2 (fr) * 2000-09-12 2002-03-21 Volkswagen Aktiengesellschaft Plaque d'immatriculation
WO2002038648A1 (fr) * 2000-11-09 2002-05-16 Avery Dennison Corporation Articles polymeres fluorescents fabriques a partir d'un polymere anti-uv

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2407680A (en) * 1945-03-02 1946-09-17 Minnesota Mining & Mfg Reflex light reflector
WO1993014422A1 (fr) * 1992-01-16 1993-07-22 Stimsonite Corporation Revetement reflechissant photoluminescent
EP0747736A1 (fr) * 1994-12-16 1996-12-11 Nippon Carbide Kogyo Kabushiki Kaisha Feuille retroreflechissante emettant un lumiere lorsqu'elle est irradiee par des rayons ultraviolets
US5988822A (en) * 1997-11-21 1999-11-23 3M Innovative Properties Company Luminous retroreflective sheeting and method for making same
WO2002023509A2 (fr) * 2000-09-12 2002-03-21 Volkswagen Aktiengesellschaft Plaque d'immatriculation
WO2002038648A1 (fr) * 2000-11-09 2002-05-16 Avery Dennison Corporation Articles polymeres fluorescents fabriques a partir d'un polymere anti-uv

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005060400B4 (de) * 2004-07-20 2020-12-10 Volkswagen Ag Baueinheit für einen Deckel eines Fahrzeugheckbereiches
WO2009027387A1 (fr) * 2007-08-27 2009-03-05 Lyttron Technology Gmbh Plaque minéralogique à effet électroluminescent, procédé de fabrication associé
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CN103802741A (zh) * 2014-02-17 2014-05-21 银薪舟 一种使汽车外壳3d变色的方法
CN103802741B (zh) * 2014-02-17 2015-12-30 银薪舟 一种使汽车外壳3d变色的方法
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