EP1890275A1 - Back illuminate plate - Google Patents
Back illuminate plate Download PDFInfo
- Publication number
- EP1890275A1 EP1890275A1 EP07114270A EP07114270A EP1890275A1 EP 1890275 A1 EP1890275 A1 EP 1890275A1 EP 07114270 A EP07114270 A EP 07114270A EP 07114270 A EP07114270 A EP 07114270A EP 1890275 A1 EP1890275 A1 EP 1890275A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- backlit
- light
- scattering
- transparent
- lenses
- 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.)
- Granted
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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F13/00—Illuminated signs; Luminous advertising
- G09F13/04—Signs, boards or panels, illuminated from behind the insignia
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
- F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
- F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
- F21S43/14—Light emitting diodes [LED]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
- F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
- F21S43/26—Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F13/00—Illuminated signs; Luminous advertising
- G09F13/04—Signs, boards or panels, illuminated from behind the insignia
- G09F13/0409—Arrangements for homogeneous illumination of the display surface, e.g. using a layer having a non-uniform transparency
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F13/00—Illuminated signs; Luminous advertising
- G09F13/20—Illuminated signs; Luminous advertising with luminescent surfaces or parts
- G09F13/22—Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2111/00—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
- F21W2111/02—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00 for roads, paths or the like
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Definitions
- the invention relates to a backlit surface having a luminous surface carrying light sources and an at least partially arranged over the luminous surface, the light scattering light emitted by the light sources scattering surface.
- Such backlit surfaces are from the EP 1 413 450 A1 known.
- an opal disk is used as a scattering surface, which is printed on one side with white and / or silver pigments in the screen printing technique.
- the pigments cause a more regular distribution of the light, wherein for the production of the printed Opalclusion existing inhomogeneities of the light are first recorded photographically and then a negative image of this image is applied to the Opalefficiency.
- This method not only has the disadvantage that individually a negative pressure must be worked out, but also causes shading of the light exit surface by the applied screen printing, so that a part of the luminous intensity is lost.
- Backlit surfaces of the type mentioned are also from the DE 201 07 442 U1 known.
- the known backlit surfaces have a luminous surface which is formed by superimposed and juxtaposed LEDs. Above this luminous area a scattering plate is arranged, which distributes the point-like emitted light of the light emitting diodes.
- backlit surfaces are from the DE 199 35 386 A1 known. This is a display surface, which also has a translucent disc through which a light component emitted behind the translucent panel is refracted. Also, the backlit surface disclosed herein has the disadvantage that the light intensity is not optimally distributed over the entire surface.
- a backlit surface which is designed as a non-glare lamp.
- a prismatic cover is used, which is arranged over an elongated light source. Even in this embodiment, no homogeneous illumination of a background is possible with reduced height.
- the object of the invention is therefore a backlit surface of the type mentioned above, which has the most homogeneous possible distribution of the intensity of the backlight at the lowest possible height.
- This object is achieved according to the invention in that between the luminous surface and the scattering surface at least one, flat lenses having additional beam modification surface is arranged, which has a plurality of juxtaposed, transparent lenses and the beam path of the light emitted by the light sources due to the optical properties of Lenses can widen.
- the beam modification surface is arranged, which modifies the beam path of the light emitted by the light sources.
- This can be a single jet area, but it is also possible for a plurality of radiation modification areas to be arranged one above the other.
- the radiation modification surface has lenses that influence the beam path. The object of these lenses is the better distribution of the beam path of the emitted light, ie a widening of the light beams so as to avoid a point-like intensity at the top of the backlit surface.
- the lenses of the radiation modification surface have an optically variable microstructure. They are preferably so-called deflection lenses, wherein a thin plastic film can be used as the beam modification surface into which the deflection lenses are embossed or otherwise formed. Such a film is sold by the meter, relatively inexpensive to produce and can be easily arranged below the scattering surface, for example by the film is glued to the scattering surface. If a plurality of beam modification surfaces are used, the individual lenses of the beam modification surfaces can be arranged offset relative to each other so as to ensure even better scattering of the transmitted light.
- the scattering surface itself as Beam modification surface to be formed.
- Beam modification surface for this purpose, for example, be modified to the effect that the lenses are embossed into this bottom at the bottom of the scattering surface.
- a separate plastic film for the beam modification surface will be provided in many applications.
- the light sources are preferably designed as light-emitting diodes. These LEDs have a particular advantage that on the one hand they can be produced in different colors, ie emit light of different frequencies, on the other hand generate little heat, so that the height of the backlit surface can be kept small. However, the closer the scattering surface moves closer to the light sources, the greater the problem that the scattering surface has to distribute the punctually imitated light component over the largest possible area.
- the distance between the beam modification surface and the light sources is approximately less than 50 mm, preferably between 15 mm and 30 mm.
- a particularly preferred embodiment uses a distance of 25 mm.
- the light sources can be combined into individual groups which can be switched to one another in different ways. On the one hand, this can be used to vary the luminous intensity of the entire luminous area; on the other hand, a multicolor luminous surface can also be provided in this way.
- the light sources are preferably applied directly to a printed circuit board, via which they are also sonicated. Via spacers, the beam modification surface and the scattering surface can then be arranged above the printed circuit board, wherein the beam modification surface in the case of a thin film is preferably held by the scattering surface on its underside.
- a circumferential frame can connect the backlit surface to a closed sandwich flap.
- the backlit surface can basically have any conceivable shape, curved or flat surfaces are conceivable.
- a preferred application of the backlit surface is located in an information carrier, which can be hung on the wall in the manner of a picture frame or has two V-shaped surfaces connected to one another in the manner of an advertising stand. In the latter case, both surfaces or only one of the two surfaces can be formed as backlit surfaces. Due to the low power consumption of the light sources used in the case of light emitting diodes, an outdoor set up can also have solar cells, via which the power supply is ensured. The latter is in particular possible because of the good scattering effect at the same time optimum transmission, the power consumption of the LEDs or the number of light-emitting diodes used can be reduced.
- the scattering surface may be a conventional opal plate made of glass or plastic or other plastic plate made of a light-scattering, transparent material, which is made of a comparable material.
- transparent, milky plastic can be used, wherein the scattering surface can be a film of any thickness.
- the scattering surface will have a thickness of less than 2 mm, wherein the scattering surface on its side facing away from the light source can also take on the function of a protective surface, so that even thicker scattering surfaces can be used, if needed.
- the beam modification surface itself may be made of a transparent plastic, but it is also possible to generate additional scattering effects by the beam modification surface itself being clouded. This can be done either by embossing the lenses in a corresponding previous material, or by laminating a second, milky film onto the lens film.
- this is a two-dimensional design of a Function area meant.
- This may be a film layer or a plate-like carrier layer, wherein the layers may be flat or curved. Even cylindrical or spherical shapes are conceivable.
- the essential application of the present invention is to provide a surface with a homogeneous backlighting.
- This surface is usually formed by an opal plate, which is designed as a scattering layer so that it lets light through and scatters the transmitted light on the other to create the impression of a regular backlighting, yes yes, for example, otherwise produced by fluorescent tubes ,
- the litter layer can also be replaced by a clear glass layer or a comparable plastic layer, but in this case a homogeneous light distribution can hardly be achieved, since the additional beam modulation layer will hardly be able to emit light emitted by the light sources Distribute light sufficiently.
- the usual application will be a housing in which the backlit surfaces are installed.
- Such housings can be used, for example, to illuminate posters, timetables or other information from behind.
- the information must also be translucent, so that the light can pass through the poster material, so as to realize a backlight.
- the application according to the invention is thus formed by a presentation device which has a housing which has a housing bottom and a side wall, via which the housing bottom is provided with a housing upper side.
- the housing upper side can be designed as a pivotable cover, which is then connected to the side wall of the housing formed as a frame so as to be pivotable on one side of the frame.
- This can be done via conventional folding hinges, including a two-part design of the housing cover opposite hinge connections is possible.
- the housing bottom may also be formed like a trough, so that the side wall is integrally connected to the housing bottom.
- the housing cover may also be firmly connected to the frame, another interchangeability can be realized, for example, that the light sources are arranged on a light source support plate, which via a slot is inserted into the housing.
- This light source support plate can also form the back of the housing itself, in this case, for example, then the light sources can be inserted from behind through through holes in the housing and contacted on the back.
- the scattering surface is formed in such a presentation device of a transparent optical layer, which may be about an opal plate made of plastic or glass material.
- a transparent optical layer which may be about an opal plate made of plastic or glass material.
- the beam modification surface is preferably formed by a transparent optical layer, which may be formed like a film. This film can then be arranged on the side facing the housing bottom of the scattering surface, be attached by gluing to the surface. A thermal welding during the manufacturing process is also possible, it is also possible that the beam modulation surface is applied directly by modifying the underside of the scattering surface on the scattering surface.
- the information carrier such as a poster
- fastening means such as clamping rails
- additional glass or plastic cover which is arranged as protection against damage or contamination on the information carrier, and For example, for the exchange of the information carrier is hinged.
- Fig. 1 A schematic view of the individual layers of a backlit surface according to the invention.
- Fig. 2 A side view of a backlit surface in section.
- the lowermost layer represents a printed circuit board designed as a luminescent layer 1, to which light sources 1, which are designed here as light-emitting diodes, are applied.
- the light emitting diodes are spaced one inch apart, which is only an exemplary distance. The required distance depends essentially on the luminous intensity of the diodes used.
- a plastic layer with impressed lenses 4 is arranged as beam modification layer 5.
- This plastic layer has the task of expanding the beam path of the transmitted light and thus to produce the highest possible areal illumination.
- the scattering layer 3 is arranged as an opal glass pane, wherein the distance A between the beam modification layer 5 and the scattering layer 3 can assume any desired size.
- opal glass is understood in this context, a disc, in particular, a direct contact between the two layers can be provided. This allows a reduction in the height, which is desired in many applications.
- the invention is basically applicable to a variety of applications applicable, in which as homogeneous a possible illumination of a surface is required with the lowest possible height.
- Examples of a common application of the invention are, in addition to the previously described information carriers, boards or advertising stands also information boards in public transport, timetable carriers or signal lights, such as taillights of a motor vehicle or glasses of traffic lights.
- An indirect illumination of switches and other functional elements can be realized in the manner described.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
- Planar Illumination Modules (AREA)
Abstract
Description
Die Erfindung betrifft eine hintergrundbeleuchtete Fläche mit einer Lichtquellen tragenden Leuchtfläche und einer zumindest partiell über der Leuchtfläche angeordneten, das von den Lichtquellen emittierte Licht streuenden Streufläche.The invention relates to a backlit surface having a luminous surface carrying light sources and an at least partially arranged over the luminous surface, the light scattering light emitted by the light sources scattering surface.
Derartige hintergrundbeleuchtete Flächen sind aus der
Hintergrundbeleuchtete Flächen der eingangs genannten Art sind auch aus der
Obwohl diese hintergrundbeleuchteten Flächen eine geringe Bauform ermöglichen, haben sie den Nachteil, dass die Intensität des durch die Streufläche durchtretenden Lichtes unterschiedlich ist, so dass die punktförmig abstrahlenden Lichtquellen unterhalb der Streufläche nach wie vor als helle Punkte erkennbar sind. Bei vielen Anwendungsfällen ist es jedoch gewünscht, dass eine homogene Ausleuchtung der gesamten Fläche erfolgt. Dies kann mit den bekannten Lichtquellen dadurch erreicht werden, dass die Streufläche einen größeren Absorptionsanteil aufweist, in dem beispielsweise die Streufläche entweder dicker oder auch milchiger ausgebildet wird. In diesem Fall ist allerdings das Transmissionsverhalten der Streufläche ungünstig, so dass ein unnötig hoher Anteil der eingekoppelten Energie über den Absorptionsanteil des Lichtes verloren geht. Eine weitere Forderung ist jedoch häufig, dass die beleuchtete Fläche relativ zur Energieaufnahme möglichst hell erscheinen soll.Although these backlit surfaces allow a small design, they have the disadvantage that the intensity of the light passing through the scattering surface is different, so that the punctiform radiating light sources below the scattering surface are still recognizable as bright points. In many applications, however, it is desired that a homogeneous illumination of the entire surface takes place. This can be achieved with the known light sources in that the scattering surface has a greater absorption ratio, in which, for example, the scattering surface is either thicker or milky. In this case, however, the transmission behavior of the scattering surface is unfavorable, so that an unnecessarily high proportion of the coupled-in energy is lost via the absorption component of the light. However, another requirement is often that the illuminated area should appear as bright as possible relative to the energy intake.
Darüber hinaus sind hintergrundbeleuchtete Flächen aus der
Aus der
Aus der
Aufgabe der Erfindung ist es daher, eine hintergrundbeleuchtete Fläche der eingangs genannten Art zu schaffen, die bei möglichst geringer Bauhöhe eine möglichst homogene Verteilung der Intensität der Hintergrundbeleuchtung aufweist.The object of the invention is therefore a backlit surface of the type mentioned above, which has the most homogeneous possible distribution of the intensity of the backlight at the lowest possible height.
Diese Aufgabe wird nach der Erfindung dadurch gelöst, dass zwischen der Leuchtfläche und der Streufläche zumindest eine, flache Linsen aufweisende zusätzliche Strahlmodifikationsfläche angeordnet ist, die eine Mehrzahl nebeneinander angeordneter, transparenter Linsen aufweist und den Strahlengang des von den Lichtquellen emittierten Lichtes infolge der optischen Eigenschaften der Linsen aufzuweiten vermag.This object is achieved according to the invention in that between the luminous surface and the scattering surface at least one, flat lenses having additional beam modification surface is arranged, which has a plurality of juxtaposed, transparent lenses and the beam path of the light emitted by the light sources due to the optical properties of Lenses can widen.
Durch die erfindungsgemäße Ausgestaltung der hintergrundbeleuchteten Fläche kann nun eine besonders flache, kostengünstig herstellbare Leuchtfläche hergestellt werden. Zwischen der Streufläche und der Leuchtfläche ist die Strahlmodifikationsfläche angeordnet, die den Strahlengang des von den Lichtquellen emittierten Lichtes modifiziert. Es kann sich hierbei um eine einzelne Strahlfläche handeln, es können aber auch mehrere Strahlenmodifikationsflächen übereinander angeordnet sein. Die Strahlenmodifikationsfläche weist Linsen auf, die den Strahlengang beeinflussen. Aufgabe dieser Linsen ist die bessere Verteilung des Strahlenganges des emittierten Lichtes, also eine Aufweitung der Leuchtstrahlen um so eine punktförmige Intensität an der Oberseite der hintergrundbeleuchteten Fläche zu vermeiden.The inventive design of the backlit surface now a particularly flat, inexpensive producible luminous surface can now be produced. Between the scattering surface and the luminous surface, the beam modification surface is arranged, which modifies the beam path of the light emitted by the light sources. This can be a single jet area, but it is also possible for a plurality of radiation modification areas to be arranged one above the other. The radiation modification surface has lenses that influence the beam path. The object of these lenses is the better distribution of the beam path of the emitted light, ie a widening of the light beams so as to avoid a point-like intensity at the top of the backlit surface.
Die Linsen der Strahlenmodifikationsfläche weisen eine optisch variable Mikrostruktur auf. Bevorzugt sind sie so genannte Defraktionslinsen, wobei als Strahlmodifikationsfläche eine dünne Kunststofffolie verwendet werden kann, in die die Defraktionslinsen eingeprägt oder auf sonstige Weise eingeformt werden. Eine solche Folie ist als Meterware, vergleichsweise kostengünstig herstellbar und lässt sich einfach unterhalb der Streufläche anordnen, beispielsweise indem die Folie auf die Streufläche aufgeklebt wird. Werden mehrere Strahlmodifikationsflächen verwendet, können die einzelnen Linsen der Strahlmodifikationsflächen relativ zueinander versetzt angeordnet werden, um so eine noch bessere Streuung des transmittierten Lichtes zu gewährleisten.The lenses of the radiation modification surface have an optically variable microstructure. They are preferably so-called deflection lenses, wherein a thin plastic film can be used as the beam modification surface into which the deflection lenses are embossed or otherwise formed. Such a film is sold by the meter, relatively inexpensive to produce and can be easily arranged below the scattering surface, for example by the film is glued to the scattering surface. If a plurality of beam modification surfaces are used, the individual lenses of the beam modification surfaces can be arranged offset relative to each other so as to ensure even better scattering of the transmitted light.
Bei einer alternativen Ausgestaltung kann auch die Streufläche selbst als Strahlmodifikationsfläche ausgebildet sein. Hierzu kann beispielsweise an der Unterseite der Streufläche dahingehend modifiziert werden, dass die Linsen in diese Unterseite eingeprägt werden. Aus Kostengründen wird jedoch in vielen Anwendungsfällen eine separate Kunststofffolie für die Strahlmodifikationsfläche vorgesehen werden.In an alternative embodiment, the scattering surface itself as Beam modification surface to be formed. For this purpose, for example, be modified to the effect that the lenses are embossed into this bottom at the bottom of the scattering surface. For cost reasons, however, a separate plastic film for the beam modification surface will be provided in many applications.
Wie bereits bei einem Teil des Standes der Technik sind die Lichtquellen bevorzugt als Leuchtdioden ausgebildet. Diese Leuchtdioden weisen einen besonderen Vorteil auf, dass sie einerseits in unterschiedlichen Farben herstellbar sind, also Licht verschiedener Frequenzen emittieren, andererseits wenig Wärme erzeugen, so dass die Bauhöhe der hintergrundbeleuchteten Fläche klein gehalten werden kann. Je näher jedoch die Streufläche an die Lichtquellen heranrückt, desto größer wird das Problem, dass die Streufläche den punktförmig imitierten Lichtanteil auf eine möglichst große Fläche verteilen muss.As in a part of the prior art, the light sources are preferably designed as light-emitting diodes. These LEDs have a particular advantage that on the one hand they can be produced in different colors, ie emit light of different frequencies, on the other hand generate little heat, so that the height of the backlit surface can be kept small. However, the closer the scattering surface moves closer to the light sources, the greater the problem that the scattering surface has to distribute the punctually imitated light component over the largest possible area.
Durch die Linsen der Strahlmodifikationsfläche kann dies nun erfindungsgemäß besonders einfach und kostengünstig geschehen. Bei einer bevorzugten Ausgestaltung der Erfindung ist der Abstand zwischen der Strahlmodifikationsfläche und den Lichtquellen etwa kleiner als 50 mm, bevorzugt liegt er zwischen 15 mm und 30 mm. Eine besonders bevorzugte Ausgestaltung verwendet einen Abstand von 25 mm. Die Lichtquellen können zu einzelnen Gruppen zusammengefasst werden, die unterschiedlich zueinander schaltbar sind. Dies kann einerseits genutzt werden, um die Leuchtintensität der gesamten Leuchtfläche zu variieren, andererseits kann auch eine mehrfarbige Leuchtfläche auf diese Weise vorgesehen sein.Due to the lenses of the beam modification surface, this can now be done in a particularly simple and cost-effective manner according to the invention. In a preferred embodiment of the invention, the distance between the beam modification surface and the light sources is approximately less than 50 mm, preferably between 15 mm and 30 mm. A particularly preferred embodiment uses a distance of 25 mm. The light sources can be combined into individual groups which can be switched to one another in different ways. On the one hand, this can be used to vary the luminous intensity of the entire luminous area; on the other hand, a multicolor luminous surface can also be provided in this way.
Die Lichtquellen sind bevorzugt unmittelbar auf eine Leiterplatte aufgebracht, über die sie auch beschallt sind. Über Abstandshalter kann dann die Strahlmodifikationsfläche und die Streufläche oberhalb der Leiterplatte angeordnet werden, wobei die Strahlmodifikationsfläche im Falle einer dünnen Folie bevorzugt von der Streufläche an deren Unterseite gehalten ist. Ein umlaufender Rahmen kann die hintergrundbeleuchtete Fläche zu einer geschlossenen Sandwich-Patte verbinden.The light sources are preferably applied directly to a printed circuit board, via which they are also sonicated. Via spacers, the beam modification surface and the scattering surface can then be arranged above the printed circuit board, wherein the beam modification surface in the case of a thin film is preferably held by the scattering surface on its underside. A circumferential frame can connect the backlit surface to a closed sandwich flap.
Die Hintergrundbeleuchtete Fläche kann grundsätzlich jede denkbare Form aufweisen, es sind gekrümmte oder auch ebene Flächen denkbar. Eine bevorzugte Anwendung der hintergrundbeleuchteten Fläche liegt in einem Informationsträger, der etwa nach der Art eines Bilderrahmens an eine Wand gehängt werden kann oder nach der Art eines Werbeaufstellers zwei V-förmig über ein Gelenk miteinander verbundene Flächen aufweist. Im letztgenannten Fall können beide Flächen oder auch nur eine der beiden Flächen als hintergrundbeleuchtete Flächen ausgebildet werden. Auf Grund der geringen Leistungsaufnahme der verwendeten Lichtquellen im Falle von Leuchtdioden kann ein im Freien aufgestellter auch Solarzellen aufweisen, über die die Energieversorgung gewährleistet ist. Letzteres wird insbesondere dadurch möglich, dass auf Grund der guten Streuwirkung bei gleichzeitig optimaler Transmission die Leistungsaufnahme der Leuchtdioden bzw. die Anzahl der verwendeten Leuchtdioden verringert werden kann.The backlit surface can basically have any conceivable shape, curved or flat surfaces are conceivable. A preferred application of the backlit surface is located in an information carrier, which can be hung on the wall in the manner of a picture frame or has two V-shaped surfaces connected to one another in the manner of an advertising stand. In the latter case, both surfaces or only one of the two surfaces can be formed as backlit surfaces. Due to the low power consumption of the light sources used in the case of light emitting diodes, an outdoor set up can also have solar cells, via which the power supply is ensured. The latter is in particular possible because of the good scattering effect at the same time optimum transmission, the power consumption of the LEDs or the number of light-emitting diodes used can be reduced.
Die Streufläche kann eine übliche Opalplatte aus Glas oder Kunststoff oder eine sonstige Kunststoffplatte aus einem Licht streuenden, transparenten Material sein, die aus einem vergleichbaren Material hergestellt ist. Hier kann beispielsweise transparenter, milchiger Kunststoff verwendet werden, wobei die Streufläche eine Folie mit beliebiger Dicke sein kann. Bevorzugt wird die Streufläche eine Dicke von weniger als 2 mm aufweisen, wobei die Streufläche an ihrer der Lichtquelle abgewandten Seite auch die Funktion einer Schutzfläche aufnehmen kann, so dass auch dickere Streuflächen Verwendung finden können, sofern dies benötigt wird.The scattering surface may be a conventional opal plate made of glass or plastic or other plastic plate made of a light-scattering, transparent material, which is made of a comparable material. Here, for example, transparent, milky plastic can be used, wherein the scattering surface can be a film of any thickness. Preferably, the scattering surface will have a thickness of less than 2 mm, wherein the scattering surface on its side facing away from the light source can also take on the function of a protective surface, so that even thicker scattering surfaces can be used, if needed.
Die Strahlmodifikationsfläche selbst kann aus einem durchsichtigen Kunststoff gefertigt sein, es ist jedoch auch möglich, zusätzliche Streueffekte dadurch zu erzeugen, dass die Strahlmodifikationsfläche selbst eingetrübt ist. Dies kann dadurch geschehen, dass entweder die Linsen in ein entsprechendes vorherige Material eingeprägt werden, oder dass eine zweite, milchige Folie auf die Linsenfolie aufkaschiert wird.The beam modification surface itself may be made of a transparent plastic, but it is also possible to generate additional scattering effects by the beam modification surface itself being clouded. This can be done either by embossing the lenses in a corresponding previous material, or by laminating a second, milky film onto the lens film.
Sofern im Zusammenhang mit der vorliegenden Anmeldung von Flächen gesprochen ist, ist hierbei eine flächige Ausgestaltung eines Funktionsbereiches gemeint. Dies kann eine Folienschicht oder auch eine plattenartige Trägerschicht sein, wobei die Schichten eben oder auch gebogen sein können. Selbst zylindrische oder kugelartige Formen sind denkbar.If spoken in the context of the present application of areas, this is a two-dimensional design of a Function area meant. This may be a film layer or a plate-like carrier layer, wherein the layers may be flat or curved. Even cylindrical or spherical shapes are conceivable.
Die wesentliche Anwendung der vorliegenden Erfindung liegt darin, eine Oberfläche mit einer homogenen Hinterleuchtung zu versehen. Diese Oberfläche wird üblicherweise von einer Opalplatte gebildet, die als Streuschicht so ausgebildet ist, so dass Sie zum einen Licht hindurch lässt und zum anderen das hindurch gelassene Licht streut, um den Eindruck einer regelmäßigen Hinterleuchtung zu schaffen, wie ja beispielsweise ansonsten von Leuchtstoffröhren erzeugt wird. Sofern es gewünscht ist, kann die Streuschicht auch durch eine Klarglasschicht bzw. eine vergleichbare Kunststoffschicht ausgetauscht werden, in diesem Fall wird allerdings eine homogene Lichtverteilung kaum noch erreicht werden können, da die zusätzliche Strahlmodulationsschicht kaum in der Lage sein wird, das von den Lichtquellen emittierte Licht hinreichend zu verteilen.The essential application of the present invention is to provide a surface with a homogeneous backlighting. This surface is usually formed by an opal plate, which is designed as a scattering layer so that it lets light through and scatters the transmitted light on the other to create the impression of a regular backlighting, yes yes, for example, otherwise produced by fluorescent tubes , If desired, the litter layer can also be replaced by a clear glass layer or a comparable plastic layer, but in this case a homogeneous light distribution can hardly be achieved, since the additional beam modulation layer will hardly be able to emit light emitted by the light sources Distribute light sufficiently.
Die übliche Anwendung wird ein Gehäuse sein, in das die hintergrundbeleuchteten Flächen eingebaut sind. Solche Gehäuse können beispielsweise verwendet werden, um Poster, Fahrpläne oder sonstige Informationen von hinten zu beleuchten. Damit dies gelingt, müssen natürlich die Informationen ebenfalls lichtdurchlässig sein, so dass das Licht durch das Postermaterial hindurch treten kann, um so eine Hintergrundbeleuchtung zu realisieren.The usual application will be a housing in which the backlit surfaces are installed. Such housings can be used, for example, to illuminate posters, timetables or other information from behind. For this to succeed, of course, the information must also be translucent, so that the light can pass through the poster material, so as to realize a backlight.
Die erfindungsgemäße Anwendung ist somit von einer Präsentationsvorrichtung gebildet, die ein Gehäuse aufweist, das einen Gehäuseboden und eine Seitenwandung aufweist, über die der Gehäuseboden mit einer Gehäuseoberseite versehen ist. Damit Lichtquellen ausgetauscht werden können, kann die Gehäuseoberseite als schwenkbarer Deckel ausgebildet sein, der dann mit der als Rahmen ausgebildeten Seitenwandung des Gehäuses schwenkbar an einer Seite des Rahmens verbunden ist. Dies kann über übliche Klappscharniere erfolgen, auch eine zweiteilige Ausbildung des Gehäusedeckels mit gegenüberliegenden Scharnierverbindungen ist möglich. Natürlich kann der Gehäuseboden auch wannenartig ausgebildet sein, so dass die Seitenwandung einstückig mit dem Gehäuseboden verbunden ist.The application according to the invention is thus formed by a presentation device which has a housing which has a housing bottom and a side wall, via which the housing bottom is provided with a housing upper side. So that light sources can be exchanged, the housing upper side can be designed as a pivotable cover, which is then connected to the side wall of the housing formed as a frame so as to be pivotable on one side of the frame. This can be done via conventional folding hinges, including a two-part design of the housing cover opposite hinge connections is possible. Of course, the housing bottom may also be formed like a trough, so that the side wall is integrally connected to the housing bottom.
Wird dagegen die Austauschbarkeit der Lichtquellen anderweitig realisiert oder wird auf diese Funktion keinen Wert gelegt, kann der Gehäusedeckel auch fest mit dem Rahmen verbunden sein, eine anderweitige Austauschbarkeit kann etwa dadurch realisiert werden, dass die Lichtquellen auf einer Lichtquellenträgerplatte angeordnet sind, die über einen Schlitz in das Gehäuse eingeschoben wird. Diese Lichtquellenträgerplatte kann auch die Gehäuserückseite selbst bilden, in diesem Fall können dann zum Beispiel die Lichtquellen von hinten durch Durchgangslöcher in das Gehäuse eingesteckt werden und auf der Rückseite kontaktiert werden.If, however, the interchangeability of the light sources realized otherwise or no value is placed on this function, the housing cover may also be firmly connected to the frame, another interchangeability can be realized, for example, that the light sources are arranged on a light source support plate, which via a slot is inserted into the housing. This light source support plate can also form the back of the housing itself, in this case, for example, then the light sources can be inserted from behind through through holes in the housing and contacted on the back.
Die Streufläche wird bei einer solchen Präsentationsvorrichtung von einer transparenten optischen Schicht gebildet, die etwa eine Opalplatte aus Kunststoff oder Glasmaterial sein kann. Im Gegensatz zum Stand der Technik muss auf Grund des erfindungsgemäßen Aufweitens der Lichtstrahlen über die Strahlmodulationsschicht diese Streuschicht nicht mehr bedruckt werden, obwohl dies natürlich zur Erzeilung weiterer Effekte nach wie vor geschehen kann.The scattering surface is formed in such a presentation device of a transparent optical layer, which may be about an opal plate made of plastic or glass material. In contrast to the prior art, due to the widening of the light beams according to the invention via the beam modulation layer, this scattering layer no longer has to be printed, although of course this can still be done to create further effects.
Die Strahlmodifikationsfläche wird bevorzugt von einer transparenten optischen Schicht gebildet, die folienartig ausgebildet sein kann. Diese Folie kann dann auf der dem Gehäuseboden zugewandten Seite der Streufläche angeordnet werden, etwa durch Aufkleben mit der Oberfläche befestigt werden. Auch ein thermisches Verschweißen während des Herstellungsverfahrens ist möglich, ferner ist es möglich, dass die Strahlmodulationsfläche unmittelbar durch Modifikation der Unterseite der Streufläche auf die Streufläche aufgebracht wird.The beam modification surface is preferably formed by a transparent optical layer, which may be formed like a film. This film can then be arranged on the side facing the housing bottom of the scattering surface, be attached by gluing to the surface. A thermal welding during the manufacturing process is also possible, it is also possible that the beam modulation surface is applied directly by modifying the underside of the scattering surface on the scattering surface.
Der Informationsträger, beispielsweise ein Plakat, kann über die bekannten Befestigungsmittel, etwa Klemmschienen, direkt auf der Streufläche befestigt werden. Es kann auch eine zusätzliche Glas- oder Kunststoffabdeckung vorgesehen sein, die als Schutz vor Beschädigung oder Verschmutzung über dem Informationsträger angeordnet ist, und zum Beispiel für den Austausch des Informationsträgers aufklappbar ist.The information carrier, such as a poster, can be attached via the known fastening means, such as clamping rails, directly on the scattering surface. It may also be provided an additional glass or plastic cover, which is arranged as protection against damage or contamination on the information carrier, and For example, for the exchange of the information carrier is hinged.
Weitere Merkmale und Vorteile der Erfindung ergeben sich aus den Unteransprüchen und aus der nachfolgenden Beschreibung eines bevorzugten Ausführungsbeispiels anhand der Zeichnungen.Further features and advantages of the invention will become apparent from the subclaims and from the following description of a preferred embodiment with reference to the drawings.
In den Zeichnungen zeigt:In the drawings shows:
Fig. 1: Eine schematische Ansicht der einzelnen Schichten einer erfindungsgemäßen, hintergrundbeleuchteten Fläche undFig. 1: A schematic view of the individual layers of a backlit surface according to the invention and
Fig. 2: Eine Seitenansicht einer hintergrundbeleuchteten Fläche im Schnitt.Fig. 2: A side view of a backlit surface in section.
In Figur 1 ist eine beispielhafte Ausgestaltung des Aufbaus der hintergrundbeleuchteten Fläche nach der Erfindung dargestellt. Die unterste Lage stellt eine als Leuchtschicht 1 ausgebildete Leiterplatte dar, auf die Lichtquellen 1, die hier als Leuchtdioden ausgebildet sind, aufgebracht sind. Die Leuchtdioden haben hier einen Abstand zueinander von 1 Inch, wobei dies nur ein beispielhafter Abstand ist. Der erforderliche Abstand ist im Wesentlichen von der Leuchtintensität der verwendeten Dioden abhängig.1 shows an exemplary embodiment of the structure of the backlit surface according to the invention is shown. The lowermost layer represents a printed circuit board designed as a
Oberhalb der Leiterplatte ist als Strahlmodifikationsschicht 5 eine Kunststofflage mit eingeprägten Linsen 4 angeordnet. Diese Kunststofflage hat die Aufgabe, den Strahlengang des transmittierten Lichtes aufzuweiten und so eine möglichst hohe flächige Ausleuchtung zu erzeugen. Oberhalb der so gebildeten Strahlmodifikationsschicht 5 ist die Streuschicht 3 als Opalglasscheibe angeordnet, wobei der Abstand A zwischen der Strahlmodifikationsschicht 5 und der Streuschicht 3 eine beliebige Größe annehmen kann. Unter Opalglas wird in diesem Zusammenhang eine Scheibe verstanden, die Insbesondere kann auch ein unmittelbarer Kontakt zwischen den beiden Schichten vorgesehen sein kann. Dies ermöglicht eine Reduzierung der Bauhöhe, was in vielen Anwendungsfällen gewünscht ist.Above the printed circuit board, a plastic layer with
Die Erfindung ist grundsätzlich auf eine Vielzahl von Anwendungen anwendbar, bei denen mit möglichst geringer Bauhöhe eine möglichst homogene Beleuchtung einer Fläche erforderlich ist. Beispiele für eine übliche Anwendung der Erfindung sind neben den bereits beschriebenen Informationsträgern, -tafeln oder Werbeaufstellern auch Hinweistafeln in öffentlichen Verkehrsmitteln, Fahrplanträger oder auch Signallampen, wie beispielsweise Rückleuchten eines Kraftfahrzeugs oder Gläser von Verkehrsampeln. Auch eine indirekte Beleuchtung von Schaltern und sonstigen Funktionselementen kann auf die beschriebene Weise realisiert werden.The invention is basically applicable to a variety of applications applicable, in which as homogeneous a possible illumination of a surface is required with the lowest possible height. Examples of a common application of the invention are, in addition to the previously described information carriers, boards or advertising stands also information boards in public transport, timetable carriers or signal lights, such as taillights of a motor vehicle or glasses of traffic lights. An indirect illumination of switches and other functional elements can be realized in the manner described.
Claims (22)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202006012684U DE202006012684U1 (en) | 2006-08-18 | 2006-08-18 | Backlit surface has plastic film ray modification surface comprising flat optical microstructure lenses between lamps and scattering surface |
Publications (2)
Publication Number | Publication Date |
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EP1890275A1 true EP1890275A1 (en) | 2008-02-20 |
EP1890275B1 EP1890275B1 (en) | 2012-11-14 |
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Family Applications (1)
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EP07114270A Not-in-force EP1890275B1 (en) | 2006-08-18 | 2007-08-13 | Back illuminate plate |
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EP (1) | EP1890275B1 (en) |
DE (1) | DE202006012684U1 (en) |
Families Citing this family (1)
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DE102007048153A1 (en) | 2007-10-08 | 2009-04-09 | Sbb Holding Gmbh & Co. Kg | Optical arrangement for use as light cover, has refractive layer, opalescent layer, metalized layer and protective layer for exhibiting light guiding effect, where opalescent layer is arranged between metalized and refractive layers |
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EP1413450A1 (en) | 2002-10-22 | 2004-04-28 | marketing-displays Produktionsgesellschaft für Werbe- und Verkaufsförderungssysteme mbh & Co. KG | Method for one-sided printing of transparent, decorated support media |
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JP2003080598A (en) * | 2001-09-14 | 2003-03-19 | Ricoh Co Ltd | Forming method of microlens sheet, and microlens sheet obtained by this forming method |
JP4178856B2 (en) * | 2002-07-12 | 2008-11-12 | 凸版印刷株式会社 | Method for manufacturing roll stamper for microlens array sheet |
JP4504188B2 (en) * | 2002-08-08 | 2010-07-14 | リフレキサイト コーポレイション | Optical structure containing polyurea |
US7186004B2 (en) * | 2002-12-31 | 2007-03-06 | Karlton David Powell | Homogenizing optical sheet, method of manufacture, and illumination system |
JP4238782B2 (en) * | 2004-06-08 | 2009-03-18 | ソニー株式会社 | Light diffusing film, method for producing the same, and screen |
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2006
- 2006-08-18 DE DE202006012684U patent/DE202006012684U1/en not_active Expired - Lifetime
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DE3420414A1 (en) | 1984-06-01 | 1985-12-05 | Dr.-Ing. Willing GmbH, 8604 Scheßlitz | Prismatic cover for suppressing glare in luminaires having elongated lamps |
JPS62249012A (en) | 1986-04-21 | 1987-10-30 | Toyoda Gosei Co Ltd | Surface light emitting display device |
DE3910520A1 (en) | 1989-04-01 | 1990-10-04 | Gossen Gmbh | Method for producing an optical filter for homogenising an inhomogeneously luminescing surface |
DE4339274A1 (en) | 1993-11-18 | 1995-05-24 | Willing Gmbh Dr Ing | Disc shaped lighting unit with uniform light output |
DE19935386A1 (en) | 1999-07-29 | 2001-02-01 | Mannesmann Vdo Ag | Display with an X-ray display field |
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DE10142582A1 (en) | 2001-08-31 | 2003-04-03 | Huber Signalbau Muenchen | Light signal unit has parallel LED clusters and long focus lenses |
EP1413450A1 (en) | 2002-10-22 | 2004-04-28 | marketing-displays Produktionsgesellschaft für Werbe- und Verkaufsförderungssysteme mbh & Co. KG | Method for one-sided printing of transparent, decorated support media |
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DE202006012684U1 (en) | 2006-11-02 |
EP1890275B1 (en) | 2012-11-14 |
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