EP1413450B1 - Méthode pour l'impression sur une surface d'un matériau support transparent et décoré - Google Patents

Méthode pour l'impression sur une surface d'un matériau support transparent et décoré Download PDF

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Publication number
EP1413450B1
EP1413450B1 EP02023501A EP02023501A EP1413450B1 EP 1413450 B1 EP1413450 B1 EP 1413450B1 EP 02023501 A EP02023501 A EP 02023501A EP 02023501 A EP02023501 A EP 02023501A EP 1413450 B1 EP1413450 B1 EP 1413450B1
Authority
EP
European Patent Office
Prior art keywords
carrier medium
housing
image
printed
shading
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.)
Expired - Lifetime
Application number
EP02023501A
Other languages
German (de)
English (en)
Other versions
EP1413450A1 (fr
Inventor
Heinz Dr. Allekotte
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.)
Marketing Displays GmbH and Co KG
Original Assignee
Marketing Displays GmbH and Co KG
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
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Application filed by Marketing Displays GmbH and Co KG filed Critical Marketing Displays GmbH and Co KG
Priority to DE50202644T priority Critical patent/DE50202644D1/de
Priority to AT02023501T priority patent/ATE292019T1/de
Priority to EP02023501A priority patent/EP1413450B1/fr
Priority to ES02023501T priority patent/ES2238537T3/es
Publication of EP1413450A1 publication Critical patent/EP1413450A1/fr
Application granted granted Critical
Publication of EP1413450B1 publication Critical patent/EP1413450B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/26—Printing on other surfaces than ordinary paper
    • B41M1/34—Printing on other surfaces than ordinary paper on glass or ceramic surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/12—Stencil printing; Silk-screen printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44F—SPECIAL DESIGNS OR PICTURES
    • B44F1/00—Designs or pictures characterised by special or unusual light effects
    • B44F1/06—Designs or pictures characterised by special or unusual light effects produced by transmitted light, e.g. transparencies, imitations of glass paintings
    • B44F1/066—Designs or pictures characterised by special or unusual light effects produced by transmitted light, e.g. transparencies, imitations of glass paintings comprising at least two transparent elements, e.g. sheets, layers
    • 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
    • G09F13/12—Signs, boards or panels, illuminated from behind the insignia using a transparent mirror or other light reflecting surface transparent to transmitted light whereby a sign, symbol, picture or other is visible only when illuminated

Definitions

  • the invention relates to a method for printing on one side of a transparent trained carrier medium.
  • a housing for Arrangement of such a carrier medium can be specified.
  • a transparent carrier medium in the sense of the present invention serves to cover preferably internally illuminated Informastionshimsten, - boards or information boxes. That usually in the line of sight behind one the housing closing housing cover arranged carrier medium is front with a substantially translucent interchangeable Information carrier, such as a billboard, provided and will back illuminated by a dedicated lighting device. The Light of the illumination device thus illuminates the back of the carrier medium as also the information carrier, so that the result is a backlit Information carrier results, which are well visible even in the dark is. This is called backlighting. For backlighting are parallel over the Surface arranged fluorescent tubes used. Such information boxes are described in documents GB-A-2 205 190, EP-A-107 939 and FR-A-2 606 539.
  • a disadvantage of the above-described arrangement is that a homogeneous light distribution and thus a uniform illumination of the Carrier medium together with information carrier is only possible if the Lighting device arranged at a minimum distance from the carrier medium is. This results in a disadvantageous very sweeping, so deep
  • edge light refers to an edge-lit device used in exchange for the Rear side of the support medium arranged lighting device respectively Body edges of the support medium arranged lights and the rearward space of the carrier medium by means of parallel to the carrier medium plane emitted light lit up. Two carrier media are so by etching deals with reflection waves.
  • the individual lamps of the Lighting device to be provided with a surface coating
  • the one Variety of prisms includes. Disclosed is such Surface coating in US 5,186,530. Shown here are within one Housing arranged light guide, which are tubular and in the from outside the housing arranged lamps light is radiated into it. For a uniform light distribution within the housing, the individual light guide provided with a special surface coating, the As a result, a plurality of prisms is formed on the optical fibers. In Dependence of the position of the individual prisms on the surface of the Light guide can achieve a more uniform overall light distribution become. However, this type of embodiment is disadvantageously very costly and above all expensive.
  • a lighting device in which a Light source is disposed within a closed housing.
  • the Lighting device has a mirror-like longitudinal direction Light reflector and via a light exit opening, which with a substantially non-light absorbing and separated from the reflector cover is closed.
  • the light reflector is made of a diffusely permeable Material, which results in switching on the lighting device in the result a diffusely propagating light distribution in the interior of the housing. From Disadvantage of this arrangement is on the one hand, the complex configuration of Reflectors and the associated cover. On the other hand, this arrangement extremely space-saving, so that even with this proposed device only comparatively deep trained housing can be provided.
  • the reflector system is extremely susceptible to interference from external influences, such as As a pollution by dust or water drops, with a Pollution of the reflector in a disproportionate extent on the reflector caused diffuse light distribution acts.
  • a lightbox for slides essentially consists of an outer frame, a rear wall and two front arranged carrier discs, between which a slide is held.
  • a correction mask arranged facing the housing box behind the slide arranged and fixed to the rearmost carrier disc.
  • the correction mask is a photographic film which is initially unexposed Condition used in lightbox, and then by the light source illuminated the light box and then developed.
  • the correction mask is extremely expensive and especially not on different light box sizes and shapes can be adapted. Rather, it is required, for each type of lighthouse a separate correction mask to customize.
  • the method is proposed to solve the above problem, a method for printing on one side of a transparently formed support medium, in particular an opal glass, with a corresponding to the illumination intensity distribution of the carrier medium in the use state with light acting lighting device shading, in which using the screen printing white and / or silver Pigments are applied to the print side of the carrier medium.
  • the method described above allows the imprint of a simple manner Shade on the back of the lighting device facing the Carrier medium.
  • White is applied by screen printing and / or silver pigments whose application front of the carrier medium not is recognizable, but nevertheless on the light incident on the back one Compensation cause brightly illuminated areas, so that in the result Carrier medium is formed, which is also at inhomogeneous lighting on the Front a uniform and homogeneous illumination surface having.
  • the carrier medium directly printed or alternatively that the carrier medium with a provided corresponding printed film.
  • the foil bearing the printed image itself is transparent and in terms of their material properties both for use in the Screen printing process as for use in connection with the inventive carrier medium is suitable.
  • the printing shading is a negative image of the illuminance distribution, too their receipt the illumination intensity distribution in a first process step recorded digitally photographically and in a second process step in a negative image is converted.
  • the Lighting device formed inhomogeneous light distribution photographically too to capture. This is preferably done by means of a digital camera, so that in Result a digitally editable positive of the inhomogeneous light distribution of the Lighting device is present.
  • This positive shows both bright and dark spots, where in the area of bright spots a high Illuminance and in the dark areas a low Illuminance is given.
  • Positive image formed imprint on the back of the carrier medium apply this positive image in a second step in a To convert negative image.
  • the negative image shows as well as the positive image bright and dark areas on, with the light and dark areas of the Negative image are formed offset in such a way that dark areas of the negative image bright areas of the positive image and vice versa.
  • the then negative image obtained by converting the positive image can then in itself known manner by means of screen printing either directly or indirectly to the Back of the carrier medium can be applied.
  • the positive image before converting it into a negative image into a digital grayscale image is converted.
  • This conversion step is advantageous in that softer transitions between dark and light areas can be formed, which results in a total uniform in the result Apparent illumination of the carrier medium is achieved.
  • the negative image is Brightness, contrast, gradation and / or sound separation.
  • discrepancies in the negative image can be smoothed out, which in consequence an improved illumination result of the carrier medium causes.
  • the printing shading is a negative image of the illuminance distribution, too their preservation the appearance of a blank and with light acted upon carrier medium as an actual image digitally detected and with a predetermined target image is compared. It is intended for this alternative Procedure that an actual image compared with a target image and From this a comparison picture is created, which then on the back of the Carrier medium is printed. The produced by the lighting device Actual image is then in the use state of the carrier medium by the on the Corrected back side of the carrier medium applied comparison image, so that on the front of the carrier medium sets the desired target image.
  • the target image can be specified freely and results For example, from the view of a homogeneously illuminated Carrier medium, which by a sufficient, for practical use, however unreachable spacing of the illumination device from the carrier medium can be achieved.
  • the shading to be printed a negative image of the Illuminance distribution is to preserve the lighting conditions on the in Use state of the carrier medium of the illumination device facing side and converted into a negative image.
  • this Procedure is performed by means of appropriate measuring the Illuminance in location dependence on the back of the carrier medium certainly. From these illuminance values can then be a negative image be calculated in the manner described above on the back of the Carrier medium is printed.
  • the carrier medium of the object it is proposed a material produced according to the inventive method carrier medium for the replaceable arrangement of, in particular light-transmitting information carriers with the invention to the solution, which is characterized in that at least one surface of the support medium with a corresponding to the illuminance distribution of the information carrier and the carrier medium provided with light acting lighting device shading is provided.
  • the side facing away from the information carrier in the installed state is shaded.
  • the shading is preferably generated by printing.
  • the peculiarity of the carrier medium according to the invention lies in the shaded Back, so that side, in the use state of the carrier medium facing the illumination device.
  • Printed is the carrier medium here with a trained for illuminance distribution corresponding Shading, bringing a contrasting on the front of the carrier medium can be effectively counteracted.
  • the on the back of the Carrier medium printed shading consists of alternating dark and light areas, with dark areas in all those places the support medium are provided, the high illuminance are exposed.
  • those areas of the carrier medium that are only are exposed to low illuminance, with only a very little darkened shading printed.
  • the on the back of the carrier medium imprinted shading thus represents a negative image of Illuminance distribution.
  • the carrier medium according to the invention advantageously allows an almost uniform and homogeneous illumination of the on the carrier medium arranged information carrier.
  • the flat construction due to a inhomogeneous illumination of the back of the carrier medium occurring Contrast areas can be through the on the back of the carrier medium provided imprint be compensated in such a way that in Overlap of both contrast gradients, that of the lighting resulting contrast on the one hand and by the imprint on the back
  • the contrast of the carrier medium is homogeneous adjusted illuminated information carrier. Without visual impairment can such an illuminated information carrier probably recognizable by the viewer be perceived.
  • the carrier medium according to the invention can therefore despite a flatter Construction resulting inhomogeneous rear lighting or Backlight of the carrier medium on the front of the carrier medium be created homogeneously acting lighting impression, so that it in Advantageously, it is possible to have a close juxtaposition of carrier medium and lighting device to ensure an overall compact and compared to the prior art miniaturized design to achieve. there the reduction of the design is not bought with the disadvantage, To get shades on the front of the carrier medium, because these in the manner described above by the on the back of the Support medium printed shading can be prevented.
  • the carrier medium is a Opal.
  • Opal has become due to their milky appearance and the resulting fürschein bine proved to be particularly advantageous.
  • Opallumina are also conceivable other disc shapes. critical is only that the disc on its rear side, that is the the Lighting device facing side with the above Shading can be printed.
  • the shading by means of Screen printing applied.
  • Screen printing of advantage, wherein in the known screen printing white and / or silver pigments to form the shade on the back of the Carrier medium can be applied according to appropriate specifications.
  • the Use of white and / or silver pigments has the advantage that they although with regard to the incident on the back of the support medium light a barrier in the sense of shading, however, that these pigments not from the front, that is from the perspective of an observer, perceived can be.
  • a further housing with a one Caseback and housing walls having and with at least one transparent housing cover lockable housing box, one inside the housing box arranged lighting device and a the Housing cover sidelined leaving a gap transparent carrier medium, wherein the carrier medium on its the Lighting device facing side with a corresponding to Illuminance distribution trained shading is printed.
  • the housing according to the invention serves in an advantageous manner, on the Carrier medium arranged information carrier evenly and homogeneously illuminate.
  • Housing devices also enables the housing according to the invention consistent or especially flatter design a uniform and homogeneous backlighting of arranged on the support medium Information carrier.
  • An insufficient and thus the information carrier not in visually appealing form presenting illumination can under Use of the housing according to the invention thus be avoided.
  • there Both the manufacture and the handling of the housing is extremely simple and requires no additional manufacturing or handling steps, such as This example, in the known from the prior art "edge light" housings the case is.
  • a further feature of the invention is in one-sided for Information carrier provided design that of the lighting device facing side of the housing bottom with a light-reflecting coating Mistake. This achieves an overall better light distribution within the housing box, although not directly to the back of the Carrier medium directed light rays reflected and thus indirectly on the Carrier medium are steered.
  • the lighting device from a plurality of juxtaposed lamps, preferably Fluorescent tubes formed.
  • fluorescent tubes has been included as particularly inexpensive and also with regard to the achievable Leuchtrise proved advantageous.
  • the housing box is opposite Weather conditions tightly closed. This allows an arrangement of Housing boxes according to the invention also in the outdoor area.
  • Fig. 1 shows a housing box 1. This consists of housing walls 2 and a housing bottom 3. Inside the Housing box 1, a light source 4 is arranged, which by means of appropriate Holder 5 is fixed to the housing bottom 3. Locked is the housing box. 1 by a housing cover 6, wherein between housing box 1 and Housing cover 6 preferably not shown in the Fig. Seals are arranged so that the closed with the housing cover 6 Housing box 1 is formed weather resistant.
  • a gap space 12 a the housing cover 6 adjacent carrier medium 8 is provided, the According to this embodiment, an opal glass is. Between the Housing cover 6 and the carrier medium 8 is in the gap space 12 a Information carrier 7, for example in the form of an advertising space arranged. Of the Housing cover 6 is transparent and thus gives the view of the free between the housing cover 6 and support medium 8 arranged information carrier 7th
  • the carrier medium 8 is on his the lighting device 4 facing page 9 with a corresponding to the illumination intensity distribution of the illumination device 4 printed shading printed.
  • this is a Negative image of the illuminance distribution, so that through in the direction of Light 11 upstream of the information carrier 7 carrier medium 8 a Compensation of uneven illumination distribution achieved with the goal is that on the front of the information carrier 7 a total uniform light distribution prevails.
  • such a optimized illumination of the information carrier 7 can be achieved without on whose front contrast differences, that is in a disturbing way alternating dark and light areas, train.
  • the Fign. 2a to 2d show in successive process steps the Formation of a printed image 16, which on the back of the previously described carrier medium 8 is printed.
  • a first Process step will be the illuminance distribution in this Embodiment consisting of several fluorescent tubes Illuminator digitally detected as a positive image 14.
  • a positive image 14 For this purpose will be the housing box 1 according to FIG. 1 with a non-printed carrier medium 8 equipped and after switching the lighting device in one Darkroom photographed.
  • the resulting positive image 14 is shown in FIG. 2a.
  • the Positive image brought to appropriate format size and into a grayscale image 15 transformed. In this case, a review of the distances between the individual fluorescent tubes of the lighting device and the ratio from gross to net format.

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  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)

Claims (22)

  1. Procédé pour l'impression unilatérale d'un matériau support (8) transparent, en particulier une vitre opale, avec un dégradé correspondant à la répartition de l'intensité lumineuse d'un appareil d'éclairage (4) alimentant en lumière (11) le matériau support (8) à l'état de service, dans lequel des pigments blancs et/ou argentés peuvent être appliqués sur la face à imprimer (9) du matériau support (8) en se servant de la technique de sérigraphie.
  2. Procédé selon la revendication 1, caractérisé en ce que le matériau support (8) est imprimé directement.
  3. Procédé selon la revendication 1, caractérisé en ce qu'une feuille à appliquer sur le matériau support (8) est imprimée.
  4. Procédé selon l'une quelconque des revendication 1 à 3, caractérisé en ce que le dégradé à imprimer est une image négative (13) de la répartition de l'intensité lumineuse pour l'obtention de laquelle la répartition de l'intensité lumineuse est saisie comme image positive (14) par photographie numérique au cours d'une première étape de procédé et convertie en une image négative (13) au cours d'une deuxième étape de procédé.
  5. Procédé selon la revendication 4, caractérisé en ce l'image positive (14) est convertie en une image neutre graduée numérique (15) avant une conversion en une image négative (13).
  6. Procédé selon la revendication 5, caractérisé en ce l'image négative (13) est retouchée pour ce qui concerne la luminosité, le contraste, la gradation et/ou la séparation des tons.
  7. Procédé selon l'une quelconque des revendication 1 à 3, caractérisé en ce que le dégradé à imprimer est une image négative (13) de la répartition de l'intensité lumineuse pour l'obtention de laquelle l'image apparente d'un matériau support (8) non imprimée et alimentée par une lumière (11) est saisie numériquement comme image réelle et comparée avec une image théorique prédéterminable.
  8. Procédé selon la revendication 7, caractérisé en ce, pour obtenir l'image théorique, un matériau support (8) non imprimé est alimenté par une lumière répartie de manière homogène et l'image apparente est saisie numériquement.
  9. Procédé selon la revendication 8, caractérisé en ce le dégradé à imprimer est calculé à partir d'une comparaison entre la valeur réelle et la valeur théorique.
  10. Procédé selon l'une quelconque des revendication 1 à 3, caractérisé en ce que le dégradé à imprimer est une image négative (13) de la répartition de l'intensité lumineuse pour l'obtention de laquelle les conditions de lumière sont saisies du côté (9) tourné vers l'appareil d'éclairage (4) à l'état de service du matériau support (8) et sont converties en une image négative (13).
  11. Matériau support pour l'agencement échangeable de supports d'information (7) en particulier transparents fabriqué selon un procédé selon l'une quelconque des revendication 1 à 10,
       caractérisé en ce que
       le côté (9) du matériau support (8) tourné à l'opposé du support d'information (7) est imprimé avec un dégradé correspondant à la répartition de l'intensité lumineuse d'un appareil d'éclairage (4) alimentant en lumière (11) le support d'information (7) et le matériau support (8).
  12. Matériau support selon la revendication 11, caractérisé en ce que celui-ci est une vitre opale.
  13. Matériau support selon l'une quelconque des revendication 11 ou 12, caractérisé en ce que le dégradé est appliqué par sérigraphie.
  14. Matériau support selon l'une quelconque des revendication 11, 12 ou 13, caractérisé en ce que le dégradé est formé par des pigments blancs et/ou argentés.
  15. Matériau support selon l'une quelconque des revendication 11 à 14, caractérisé en ce que le dégradé est une image négative (13) de la répartition de l'intensité lumineuse.
  16. Boítier avec un coffret de boítier (1) comportant un fond de boítier (3) et des parois de boítier (2) et obturable par un couvercle de boítier transparent (6), un appareil d'éclairage (4) placé à l'intérieur du coffret de boítier (1) ainsi qu'un matériau support (8) transparent placé à côté du couvercle de boítier en laissant un interstice (12), fabriqué en particulier selon un procédé selon l'une quelconque des revendication 1 à 10, caractérisé en ce que le matériau support (8) est imprimé avec un dégradé correspondant à la répartition de l'intensité lumineuse d'un appareil d'éclairage (4) de son côté (9) tourné vers l'appareil d'éclairage (4).
  17. Boítier selon la revendication 16, caractérisé en ce que le matériau support (8) est une vitre opale.
  18. Boítier selon la revendication 16 ou 17, caractérisé en ce que le côté (10) du fond de boítier (3) tourné vers l'appareil d'éclairage (4) est muni d'une couche réfléchissant la lumière.
  19. Boítier selon l'une quelconque des revendications 16, 17 ou 18, caractérisé en ce que le matériau support (8) est agencé de manière échangeable dans le coffret de boítier (1).
  20. Boítier selon l'une quelconque des revendication 16 à 19, caractérisé en ce que le dégradé est imprimé sur le matériau support (8) par sérigraphie.
  21. Boítier selon l'une quelconque des revendication 16 à 20, caractérisé en ce que l'appareil d'éclairage (4) est formé par une pluralité de moyens lumineux, de préférence des tubes fluorescents, placés les uns à côté des autres.
  22. Boítier selon l'une quelconque des revendication 16 à 21, caractérisé en ce que le coffret de boítier (1) est obturable hermétiquement vis-à-vis des intempéries.
EP02023501A 2002-10-22 2002-10-22 Méthode pour l'impression sur une surface d'un matériau support transparent et décoré Expired - Lifetime EP1413450B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE50202644T DE50202644D1 (de) 2002-10-22 2002-10-22 Verfahren zum einseitigen Bedrucken eines transparent ausgebildeten Trägermediums
AT02023501T ATE292019T1 (de) 2002-10-22 2002-10-22 Verfahren zum einseitigen bedrucken eines transparent ausgebildeten trägermediums
EP02023501A EP1413450B1 (fr) 2002-10-22 2002-10-22 Méthode pour l'impression sur une surface d'un matériau support transparent et décoré
ES02023501T ES2238537T3 (es) 2002-10-22 2002-10-22 Procedimiento para la impresion unilateral de un medio de soporte configurado transparente.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02023501A EP1413450B1 (fr) 2002-10-22 2002-10-22 Méthode pour l'impression sur une surface d'un matériau support transparent et décoré

Publications (2)

Publication Number Publication Date
EP1413450A1 EP1413450A1 (fr) 2004-04-28
EP1413450B1 true EP1413450B1 (fr) 2005-03-30

Family

ID=32049991

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02023501A Expired - Lifetime EP1413450B1 (fr) 2002-10-22 2002-10-22 Méthode pour l'impression sur une surface d'un matériau support transparent et décoré

Country Status (4)

Country Link
EP (1) EP1413450B1 (fr)
AT (1) ATE292019T1 (fr)
DE (1) DE50202644D1 (fr)
ES (1) ES2238537T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202006012684U1 (de) 2006-08-18 2006-11-02 Rokusek, Petr Hintergrundbeleuchtete Fläche
ITUD20100068A1 (it) * 2010-04-09 2011-10-10 Martini Spa Diffusore di luce, lampada comprendente tale diffusore e procedimento per la sua realizzazione

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IE822435L (en) * 1982-10-07 1984-04-07 Francis Alfred Carroll Display device
DE3543014A1 (de) 1985-12-05 1987-06-11 Hinrichs Fotowerbung Gmbh Leuchtkasten fuer diapositive
FR2606539B1 (fr) * 1986-11-12 1991-12-06 Vitrant Christian Tableau lumineux a effet decoratif et/ou d'eclairage changeant avec le mode d'eclairage
GB2205190B (en) * 1987-05-28 1992-01-02 Kenneth Michael Pedersen Display units.
US4937716A (en) 1988-05-05 1990-06-26 Tir Systems Ltd Illuminating device having non-absorptive variable transmissivity cover
US5186530A (en) 1991-11-22 1993-02-16 Tir Systems, Ltd. Lighting structure having variable transmissivity internal light guide illumination

Also Published As

Publication number Publication date
ATE292019T1 (de) 2005-04-15
DE50202644D1 (de) 2005-05-04
EP1413450A1 (fr) 2004-04-28
ES2238537T3 (es) 2005-09-01

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