EP0327454B1 - Display screen with very large dimensions - Google Patents

Display screen with very large dimensions Download PDF

Info

Publication number
EP0327454B1
EP0327454B1 EP89400281A EP89400281A EP0327454B1 EP 0327454 B1 EP0327454 B1 EP 0327454B1 EP 89400281 A EP89400281 A EP 89400281A EP 89400281 A EP89400281 A EP 89400281A EP 0327454 B1 EP0327454 B1 EP 0327454B1
Authority
EP
European Patent Office
Prior art keywords
display screen
display
fibers
screen according
fibres
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
EP89400281A
Other languages
German (de)
French (fr)
Other versions
EP0327454A1 (en
Inventor
François Du Castel
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.)
Orange SA
Original Assignee
France Telecom SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by France Telecom SA filed Critical France Telecom SA
Publication of EP0327454A1 publication Critical patent/EP0327454A1/en
Application granted granted Critical
Publication of EP0327454B1 publication Critical patent/EP0327454B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • G09F9/305—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 the ends of optical fibres

Definitions

  • the present invention relates to a very large display screen. It finds an application in the realization of screens for purposes of decoration, information, animation ... intended for use outdoors, in public places, etc.
  • Cinematograph projection screens have been known for a long time and for some time the so-called "giant” screens allowing the projection of television images.
  • Remote light signaling devices using light emitting diodes coupled to optical fibers are also disclosed in document FR-A-2573896.
  • the invention according to claim 1 is precisely intended to remedy these drawbacks. To this end, it offers a screen whose principle and structure make it possible to reach considerable display surfaces, for example 50 meters by 50 meters, or more. Despite its very large dimensions, the brightness and definition of the image are excellent, and the complexity of the control system remains acceptable.
  • a screen consisting of a curtain of suspended optical fibers and of different lengths, these lengths being such that the free ends of the fibers define a surface, which is the display surface, the other ends of the fibers being optically coupled to as many light-emitting diodes.
  • This flat surface is preferably rectangular or square; but it could be circular or elliptical.
  • the light-emitting diodes consist of triads emitting primary colors, such as red, green and blue. The display is then made in color.
  • the display screen shown in FIG. 1 comprises a horizontal rectangular frame 10 from which optical fibers 20 are suspended. These fibers have different lengths, so that their free ends define a rectangular surface 22, which is the surface of display.
  • the optical fibers are also optically coupled to light-emitting diodes 30, which in the example illustrated, are assembled in a frame 32. These diodes are electrically connected to a control and addressing assembly 34.
  • the fibers belonging to the same line parallel to the long side of the frame 10 all have the same length.
  • the fibers belonging to the same line parallel to the short side of the frame have a length which increases linearly with the depth, the rear fibers thus being notably longer than the front fibers.
  • the display square can have, for example, sides 50 meters long.
  • the depth of the screen (length of the small side of the frame 32) can be 3 meters.
  • Such a screen can be broken down into elementary display zones, each of which makes it possible to form an image element (or "pixel").
  • Such an elementary zone bears the reference 40 in FIG. 1 and is shown in more detail in FIG. 2A-2B.
  • Each elementary zone can include 3000 points, which requires 3000 diodes.
  • An elementary area can have a side of 0.5 meters. Its depth can be 30 mm. There are thus 100x100 or 10,000 unit areas of this type for the entire screen. The assembly thus requires 10,000x3,000, ie 30 million light-emitting diodes.
  • Figure 3 shows how the fibers are grouped into triads 20R, 20V and 20B. These fibers guide quasi-monochromatic lights, respectively red, green and blue, coming from suitable diodes. Thus, to each triad of points in an elementary zone correspond a luminance and a chrominance. The control of all the diodes associated with an elementary zone makes it possible to give the pixel corresponding to this zone the desired luminance and chrominance. Certain diodes may not be excited for low luminance levels or for chrominances corresponding to pure primaries.
  • each pixel corresponds to a power ranging from 0 to 3W.
  • the power can reach 30 kW.
  • plastic optical fibers are used.
  • Such fibers have a diameter of 0.5 mm. 1000 triads of such fibers are thus grouped by elementary zone. Thirty triads occupy the 30 mm offered in depth (they are therefore almost contiguous) and the 500 mm offered in length.
  • the total weight of the screen is 19 tonnes. However, this weight can be reduced if the fibers are no longer suspended on a single frame (such as 10 in FIG. 1) but on two (or more) frames placed at different heights, the second being placed for example at mid -height. The rear fibers, which are normally the longest, are then cut in half.
  • the fiber curtain constituting the screen can be mounted floating freely, which can lead, in windy conditions, to a slow movement of the image, a happy effect.
  • the screen has a modular character at the level of an elementary area first, at the global level then. It is therefore possible, as required, to combine several screens such as that of FIG. 1, either side by side to increase the width, or even one above the other to increase the height.
  • screens can be produced in the form of a vertical stripe, for messages written in a language for which the writing goes from top to bottom (Japanese for example).

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Description

La présente invention a pour objet un écran d'affichage de très grandes dimensions. Elle trouve une application dans la réalisation d'écrans à des fins de décoration, d'information, d'animation... destinés à une utilisation en plein air, dans les lieux publics, etc.The present invention relates to a very large display screen. It finds an application in the realization of screens for purposes of decoration, information, animation ... intended for use outdoors, in public places, etc.

On connaît depuis longtemps les écrans de projection du cinématographe et depuis quelque temps les écrans dits "géants" permettant la projection d'images de télévision.Cinematograph projection screens have been known for a long time and for some time the so-called "giant" screens allowing the projection of television images.

Des mosaïques d'écrans vidéo ont également fait leur apparition.Mosaics of video screens have also appeared.

Des technologies sophistiquées, mettant en oeuvre des cristaux liquides, des tubes à décharge, etc., ont permis également la réalisation d'écrans plats de grande surface.Sophisticated technologies, using liquid crystals, discharge tubes, etc., have also made it possible to produce large area flat screens.

Des dispositifs de signalisation lumineuse à distance utilisant des diodes électroluminescentes couplées à des fibres optiques sont également divulgués par le document FR-A- 2573896.Remote light signaling devices using light emitting diodes coupled to optical fibers are also disclosed in document FR-A-2573896.

Bien que donnant satisfaction à certains égards, ces techniques présentent l'inconvénient de ne pas permettre la réalisation d'écrans de très grandes dimensions, c'est-à-dire de quelques dizaines de mètres de côté. Les écrans du type à projection pêchent par défaut de luminosité et de définition et les écrans plats par excès de difficulté d'adressage.Although satisfactory in certain respects, these techniques have the drawback of not making it possible to produce very large screens, that is to say a few tens of meters per side. Projection type screens default in brightness and definition and flat screens by excessive addressing difficulty.

L'invention selon la revendication 1 a justement pour but de remédier à ces inconvénients. A cette fin, elle propose un écran dont le principe et la structure permettent d'atteindre des surfaces d'affichage considérables, par exemple 50 mètres sur 50 métrés, ou plus. Malgré ses très grandes dimensions, la luminosité et la définition de l'image sont excellentes, et la complexité du système de commande reste acceptable.The invention according to claim 1 is precisely intended to remedy these drawbacks. To this end, it offers a screen whose principle and structure make it possible to reach considerable display surfaces, for example 50 meters by 50 meters, or more. Despite its very large dimensions, the brightness and definition of the image are excellent, and the complexity of the control system remains acceptable.

Ce résultat est obtenu, grâce à l'invention, par un écran constitué d'un rideau de fibres optiques suspendues et de longueurs différentes, ces longueurs étant telles que les extrémités libres des fibres définissent une surface, qui est la surface d'affichage, les autres extrémités des fibres étant optiquement couplées à autant de diodes électroluminescentes.This result is obtained, thanks to the invention, by a screen consisting of a curtain of suspended optical fibers and of different lengths, these lengths being such that the free ends of the fibers define a surface, which is the display surface, the other ends of the fibers being optically coupled to as many light-emitting diodes.

Bien que des surfaces d'affichage de toute forme (concave, convexe, en calotte sphérique, etc.) soient possibles, on préfère le plus souvent une surface plane.Although display surfaces of any shape (concave, convex, spherical cap, etc.) are possible, most often a flat surface is preferred.

Cette surface plane est de préférence rectangulaire ou carrée ; mais elle pourrait être circulaire ou elliptique.This flat surface is preferably rectangular or square; but it could be circular or elliptical.

Selon un mode de réalisation avantageux, les diodes électroluminescentes sont constituées de triades émettant des couleurs primaires, comme le rouge, le vert et le bleu. L'affichage s'effectue alors en couleur.According to an advantageous embodiment, the light-emitting diodes consist of triads emitting primary colors, such as red, green and blue. The display is then made in color.

De toute façon les caractéristiques de l'invention apparaîtront mieux à la lumière de la description qui va suivre. Cette description porte sur des exemples de réalisation donnés à titre explicatif et non limitatif et elle se réfère à des dessins annexés sur lesquels :

  • la figure 1 montre un écran selon l'invention ;
  • la figure 2A-2B montre une zone élémentaire d'affichage ;
  • la figure 3 montre une triade de fibres optiques guidant des lumières de trois couleurs primaires.
In any case, the characteristics of the invention will appear better in the light of the description which follows. This description relates to exemplary embodiments given by way of explanation and without limitation and it refers to the attached drawings in which:
  • Figure 1 shows a screen according to the invention;
  • Figure 2A-2B shows a basic display area;
  • Figure 3 shows a triad of optical fibers guiding lights of three primary colors.

L'écran d'affichage représenté sur la figure 1 comprend un cadre rectangulaire horizontal 10 auquel sont suspendues des fibres optiques 20. Ces fibres ont des longueurs différentes, de sorte que leurs extrémités libres définissent une surface rectangulaire 22, qui est la surface d'affichage.The display screen shown in FIG. 1 comprises a horizontal rectangular frame 10 from which optical fibers 20 are suspended. These fibers have different lengths, so that their free ends define a rectangular surface 22, which is the surface of display.

Les fibres optiques sont par ailleurs couplées optiquement à des diodes électroluminescentes 30, qui dans l'exemple illustré, sont rassemblées dans un cadre 32. Ces diodes sont reliées électriquement à un ensemble de commande et d'adressage 34.The optical fibers are also optically coupled to light-emitting diodes 30, which in the example illustrated, are assembled in a frame 32. These diodes are electrically connected to a control and addressing assembly 34.

Naturellement, il n'est pas nécessaire de rassembler en un seul panneau toutes ces diodes. On peut aussi bien les grouper en divers paquets répartis à proximité de l'écran.Naturally, it is not necessary to combine all these diodes in a single panel. They can also be grouped into various packages distributed near the screen.

Dans le mode de réalisation illustré, les fibres appartenant à une même ligne parallèle au grand côté du cadre 10, ont toutes une même longueur. Mais les fibres appartenant à une même ligne parallèle au petit côté du cadre, ont une longueur qui augmente linéairement avec la profondeur, les fibres arrière étant ainsi notablement plus longues que les fibres avant.In the illustrated embodiment, the fibers belonging to the same line parallel to the long side of the frame 10, all have the same length. However, the fibers belonging to the same line parallel to the short side of the frame have a length which increases linearly with the depth, the rear fibers thus being notably longer than the front fibers.

Le carré d'affichage peut présenter, par exemple, des côtés de 50 métrés de long. La profondeur de l'écran (longueur du petit côté du cadre 32) peut être de 3 mètres.The display square can have, for example, sides 50 meters long. The depth of the screen (length of the small side of the frame 32) can be 3 meters.

On peut décomposer un tel écran en zones élémentaires d'affichage, qui permettent chacune de former un élément d'image (ou "pixel"). Une telle zone élémentaire porte la référence 40 sur la figure 1 et est représentée plus en détail sur la figure 2A-2B.Such a screen can be broken down into elementary display zones, each of which makes it possible to form an image element (or "pixel"). Such an elementary zone bears the reference 40 in FIG. 1 and is shown in more detail in FIG. 2A-2B.

Chaque zone élémentaire peut comprendre 3000 points, ce qui nécessite 3000 diodes. Une zone élémentaire peut avoir 0,5 mètre de côté. Sa profondeur peut être de 30 mm. Il existe ainsi 100x100 soit 10 000 zones unitaires de ce type pour la totalité de l'écran. L'ensemble requiert ainsi 10 000x3 000 soit 30 millions de diodes électroluminescentes.Each elementary zone can include 3000 points, which requires 3000 diodes. An elementary area can have a side of 0.5 meters. Its depth can be 30 mm. There are thus 100x100 or 10,000 unit areas of this type for the entire screen. The assembly thus requires 10,000x3,000, ie 30 million light-emitting diodes.

Comme il faut nécessairement couper les fibres au moment de la réalisation de l'écran pour leur donner la longueur appropriée, il est possible de les biseauter, pour favoriser une directivité vers le lieu d'observation. C'est ce qui est illustré sur la figure 2A. Mais on peut aussi les couper selon un plan de section droite (figure 2B).As the fibers must necessarily be cut when the screen is produced to give them the appropriate length, it is possible to bevel them, to promote directivity towards the place of observation. This is illustrated in Figure 2A. But we can also cut them along a cross-section plane (Figure 2B).

La figure 3 montre comment les fibres sont groupées en triades 20R, 20V et 20B. Ces fibres guident des lumières quasi-monochromatiques, respectivement rouge, verte et bleue, provenant de diodes appropriées. Ainsi, à chaque triade de points d'une zone élémentaire correspondent une luminance et une chrominance. La commande de l'ensemble des diodes associées à une zone élémentaire permet de donner, au pixel correspondant à cette zone, la luminance et la chrominance souhaitées. Certaines diodes pourront ne pas être excitées pour les faibles niveaux de luminance ou pour les chrominances correspondant à des primaires pures.Figure 3 shows how the fibers are grouped into triads 20R, 20V and 20B. These fibers guide quasi-monochromatic lights, respectively red, green and blue, coming from suitable diodes. Thus, to each triad of points in an elementary zone correspond a luminance and a chrominance. The control of all the diodes associated with an elementary zone makes it possible to give the pixel corresponding to this zone the desired luminance and chrominance. Certain diodes may not be excited for low luminance levels or for chrominances corresponding to pure primaries.

Avec des diodes pouvant rayonner une puissance de 1 mW, chaque pixel correspond à une puissance allant de 0 à 3W. Pour l'ensemble de l'écran, la puissance peut atteindre 30 kW.With diodes capable of radiating a power of 1 mW, each pixel corresponds to a power ranging from 0 to 3W. For the entire screen, the power can reach 30 kW.

De préférence, on utilise des fibres optiques en plastique. De telles fibres ont un diamètre de 0,5 mm. On groupe ainsi 1 000 triades de telles fibres par zone élémentaire. Une trentaine de triades occupe les 30 mm offerts en profondeur (elles sont donc quasiment jointives) et les 500 mm offerts en longueur.Preferably, plastic optical fibers are used. Such fibers have a diameter of 0.5 mm. 1000 triads of such fibers are thus grouped by elementary zone. Thirty triads occupy the 30 mm offered in depth (they are therefore almost contiguous) and the 500 mm offered in length.

Avec des fibres pesant environ 25 g par 100 m, le poids total de l'écran est de 19 tonnes. Mais on peut réduire ce poids si l'on suspend les fibres non plus sur un seul cadre (tel que 10 sur la figure 1) mais sur deux (ou plus) cadres placés à des hauteurs différentes, le second étant disposé par exemple à mi-hauteur. Les fibres arrière, qui sont normalement les plus longues, se trouvent alors réduites de moitié.With fibers weighing approximately 25 g per 100 m, the total weight of the screen is 19 tonnes. However, this weight can be reduced if the fibers are no longer suspended on a single frame (such as 10 in FIG. 1) but on two (or more) frames placed at different heights, the second being placed for example at mid -height. The rear fibers, which are normally the longest, are then cut in half.

Le rideau de fibres constituant l'écran peut être monté flottant librement, ce qui peut conduire, en cas de vent, à un lent mouvement de l'image, d'un heureux effet. Cependant, si l'on tient à une image fixe, il est toujours possible de disposer un ou plusieurs films transparents, en plastique par exemple, dans ou autour du rideau de fibres.The fiber curtain constituting the screen can be mounted floating freely, which can lead, in windy conditions, to a slow movement of the image, a happy effect. However, if we stick to a fixed image, it is always possible to have one or more transparent films, plastic for example, in or around the curtain of fibers.

Après cette description, on voit que l'écran présente un caractère modulaire au niveau d'une zone élémentaire d'abord, au niveau global ensuite. On peut donc, en fonction des besoins, associer plusieurs écrans tels que celui de la figure 1, soit côte à côte pour augmenter la largeur, soir les uns au-dessus des autres pour augmenter la hauteur. En particulier, on peut réaliser des écrans en forme de bande verticale, pour des messages rédigés en une langue pour laquelle l'écriture va de haut en bas (le japonais par exemple).After this description, we see that the screen has a modular character at the level of an elementary area first, at the global level then. It is therefore possible, as required, to combine several screens such as that of FIG. 1, either side by side to increase the width, or even one above the other to increase the height. In particular, screens can be produced in the form of a vertical stripe, for messages written in a language for which the writing goes from top to bottom (Japanese for example).

Claims (6)

  1. Very large size display screen comprising optical fibres (20), whereof a first end is coupled to a light emitting diode (30) and a second end defines a point of a display surface, characterized in that the optical fibres (20) form a curtain of suspended fibres, which have different lengths, so that said second end define the said display surface (22).
  2. Display screen according to claim 1, characterized in that the display surface is a plane.
  3. Display screen according to claim 2, characterized in that the display surface is a rectangle.
  4. Display screen according to claim 1, characterized in that the screen is subdivided into elementary display zones, each zone having a plurality of fibres defining an element of the displayed picture.
  5. Display screen according to claim 1, characterized in that the light emitting diodes are grouped into triads emitting three primary colours, the display then being in coloured form.
  6. Display screen according to claim 1, characterized in that the optical fibres are plastic fibres.
EP89400281A 1988-02-03 1989-02-01 Display screen with very large dimensions Expired - Lifetime EP0327454B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8801251A FR2626700B1 (en) 1988-02-03 1988-02-03 VERY LARGE DIMENSIONS DISPLAY
FR8801251 1988-02-03

Publications (2)

Publication Number Publication Date
EP0327454A1 EP0327454A1 (en) 1989-08-09
EP0327454B1 true EP0327454B1 (en) 1992-12-30

Family

ID=9362904

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89400281A Expired - Lifetime EP0327454B1 (en) 1988-02-03 1989-02-01 Display screen with very large dimensions

Country Status (4)

Country Link
US (1) US5066947A (en)
EP (1) EP0327454B1 (en)
DE (1) DE68904085T2 (en)
FR (1) FR2626700B1 (en)

Families Citing this family (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5532711A (en) * 1991-09-27 1996-07-02 Inwave Corporation Lightweight display systems and methods for making and employing same
CN1028385C (en) * 1991-09-30 1995-05-10 莫托罗拉公司 Compact virtual image display
JPH08171352A (en) * 1993-11-09 1996-07-02 Sanyo Electric Co Ltd Light leakage preventive device and self-luminous display device formed by using the same
US5491472A (en) * 1993-12-28 1996-02-13 Kurtz; Fred R. RF switching with remote controllers dedicated to other devices
US5818998A (en) * 1994-03-25 1998-10-06 Inwave Corporation Components for fiber-optic matrix display systems
US5740296A (en) * 1996-09-05 1998-04-14 Inwave Corporation Adjustable terminal housing for optical fiber
US5990802A (en) * 1998-05-18 1999-11-23 Smartlite Communications, Inc. Modular LED messaging sign panel and display system
US6222971B1 (en) * 1998-07-17 2001-04-24 David Slobodin Small inlet optical panel and a method of making a small inlet optical panel
CA2338995A1 (en) * 1998-07-31 2000-02-10 Edward Reed Interactive light display
US6301417B1 (en) 1998-08-31 2001-10-09 Brookhaven Science Associates Ultrathin optical panel and a method of making an ultrathin optical panel
US6400876B1 (en) 1998-08-31 2002-06-04 Brookhaven Science Associates Ultrathin optical panel and a method of making an ultrathin optical panel
US6535674B2 (en) 2000-12-15 2003-03-18 Scram Technologies, Inc. High contrast front projection display panel and a method of making a high contrast front projection display panel
US6571044B2 (en) 2001-05-18 2003-05-27 Scram Technologies, Inc. High contrast display panel and a method of making a high contrast display panel
US6755534B2 (en) 2001-08-24 2004-06-29 Brookhaven Science Associates Prismatic optical display
US6827277B2 (en) 2001-10-02 2004-12-07 Digimarc Corporation Use of pearlescent and other pigments to create a security document
US7143950B2 (en) * 2001-10-02 2006-12-05 Digimarc Corporation Ink with cohesive failure and identification document including same
AU2002364255A1 (en) 2001-12-24 2003-07-15 Digimarc Id Systems, Llc Covert variable information on id documents and methods of making same
US7694887B2 (en) 2001-12-24 2010-04-13 L-1 Secure Credentialing, Inc. Optically variable personalized indicia for identification documents
CA2652104C (en) * 2001-12-24 2012-02-14 Digimarc Id Systems, Llc Contact smart cards having a document core, contactless smart cards including multi-layered structure, pet-based identification document, and methods of making same
US7793846B2 (en) 2001-12-24 2010-09-14 L-1 Secure Credentialing, Inc. Systems, compositions, and methods for full color laser engraving of ID documents
AU2002364036A1 (en) 2001-12-24 2003-07-15 Digimarc Id Systems, Llc Laser etched security features for identification documents and methods of making same
AU2003221894A1 (en) 2002-04-09 2003-10-27 Digimarc Id Systems, Llc Image processing techniques for printing identification cards and documents
US7824029B2 (en) 2002-05-10 2010-11-02 L-1 Secure Credentialing, Inc. Identification card printer-assembler for over the counter card issuing
US7804982B2 (en) 2002-11-26 2010-09-28 L-1 Secure Credentialing, Inc. Systems and methods for managing and detecting fraud in image databases used with identification documents
EP1614064B1 (en) 2003-04-16 2010-12-08 L-1 Secure Credentialing, Inc. Three dimensional data storage
US7744002B2 (en) 2004-03-11 2010-06-29 L-1 Secure Credentialing, Inc. Tamper evident adhesive and identification document including same
US20050247794A1 (en) * 2004-03-26 2005-11-10 Jones Robert L Identification document having intrusion resistance
US7187831B2 (en) * 2004-04-26 2007-03-06 Brookhaven Science Associates Optical panel system including stackable waveguides
US20060176451A1 (en) * 2005-02-07 2006-08-10 Huei-Pei Kuo Fiber optic rear projection display
US20080285125A1 (en) * 2007-05-18 2008-11-20 Fujifilm Manufacturing U.S.A. Inc. Optical panel for front projection under ambient lighting conditions
US7496263B2 (en) * 2007-06-07 2009-02-24 Fujifilm Manfacturing U.S.A. Inc. Thermosetting optical waveguide coating
US20080305255A1 (en) * 2007-06-07 2008-12-11 Fujifilm Manufacturing U.S.A. Inc. Optical waveguide coating
US20090180295A1 (en) * 2007-11-07 2009-07-16 Aristocrat Technologies Australia Pty Limited Optical display
AU2012211354B2 (en) * 2007-11-07 2015-08-20 Aristocrat Technologies Australia Pty Limited An optical display
US8331749B2 (en) 2009-12-31 2012-12-11 Juniper Networks, Inc. Using a waveguide to display information on electronic devices
US20130227899A1 (en) * 2010-02-12 2013-09-05 Taiwan Plastic Optical Fiber Co., Ltd. Concrete wall with optical fibers display device
KR102345341B1 (en) * 2014-08-01 2021-12-30 엘지전자 주식회사 Screen and laser display appapatus using the same

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3786500A (en) * 1971-08-03 1974-01-15 R Fiorletta Fiber optic translator
US3744048A (en) * 1971-09-01 1973-07-03 Ultronic Systems Corp Display apparatus employing fiber optics
US3766376A (en) * 1972-03-02 1973-10-16 Noma World Wide Inc Artificial christmas tree illuminated by optic fiber sprays
GB1433327A (en) * 1972-03-17 1976-04-28 Axbey P J Display devices
GB1499121A (en) * 1976-01-22 1978-01-25 Walker E Colour changing device
US4296562A (en) * 1978-03-07 1981-10-27 Sanborn George A Traveling light display
US4279089A (en) * 1978-07-11 1981-07-21 Tatsuo Murakami Optical illumination device
US4525711A (en) * 1982-09-03 1985-06-25 Gery Alan R Three-dimensional fiber optic display
DE3303917A1 (en) * 1983-02-05 1984-08-09 Robert Bosch Gmbh, 7000 Stuttgart Display device
FR2573896B1 (en) * 1984-11-23 1987-02-13 Dandrel Francois REMOTE LIGHT SIGNALING DEVICE

Also Published As

Publication number Publication date
DE68904085D1 (en) 1993-02-11
US5066947A (en) 1991-11-19
DE68904085T2 (en) 1993-06-09
EP0327454A1 (en) 1989-08-09
FR2626700B1 (en) 1992-12-04
FR2626700A1 (en) 1989-08-04

Similar Documents

Publication Publication Date Title
EP0327454B1 (en) Display screen with very large dimensions
EP0875021B1 (en) Static screen for animated pictures
CA2883724C (en) Display screen, in particular for autostereoscopy
KR20060023134A (en) Scanning backlight for flat-panel display
JPH04345157A (en) Projection type display device
FR2829832A1 (en) Automobile rear/stop photo-emissive diode lamp and reflectors, uses segmented auxiliary reflectors each segment comprising a reflecting part and a terraced part
FR2761799A1 (en) ORDERED ARRANGEMENT OF VISUALIZATION ELEMENTS, LIGHTING SYSTEM FOR VISUALIZATION INDICATOR DEVICE, AND VEHICLE DESTINATION INDICATOR DEVICE
FR2579354A1 (en) CHARACTER DISPLAY APPARATUS
FR2745937A1 (en) DISPLAY ELEMENT, NETWORK AND COLUMN OF DISPLAY ELEMENTS, AND DESTINATION INDICATOR OF A VEHICLE FORMED OF SUCH DISPLAY ELEMENTS
FR2713812A1 (en) Modular liquid crystal display screen for large video display
FR2755516A1 (en) COMPACT ILLUMINATION DEVICE
BE1010327A7 (en) MODULATION DEVICE, ELECTRO-OPTICAL LIGHT INCLUDING bimorphs.
KR101129542B1 (en) The system for providing figuration and the apparatus thereof
EP0762367B1 (en) Matrix display panel
FR2574206A1 (en) Light emitting cell, with variable luminance and chromatics and screen obtained by juxtaposition of a plurality of emitting cells
EP0530313B1 (en) Device for improving the optical contrast of a holographic image
EP0999469B1 (en) Image projection device
FR2686396A1 (en) Luminous stand making it possible to display a consumable object and its light production device
EP0889457B1 (en) Illuminated display panel
FR2723461A1 (en) Illuminated display sign for design, logo or text
NL1015992C2 (en) Information column.
FR2599537A1 (en) Device for display by optical fibres
GB2272556A (en) Display with a fibrous surface
FR2535861A1 (en) ARRANGEMENT OF DISPLAY INDICATORS FOR SLR CAMERAS
JP2750097B2 (en) Display element

Legal Events

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

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE GB

17P Request for examination filed

Effective date: 19900111

17Q First examination report despatched

Effective date: 19920428

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: FRANCE TELECOM

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE GB

REF Corresponds to:

Ref document number: 68904085

Country of ref document: DE

Date of ref document: 19930211

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19930223

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19940201

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19940204

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19950201

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19950201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19951101