WO1988002530A1 - Display device with optical fibres associated with liquid crystals - Google Patents

Display device with optical fibres associated with liquid crystals Download PDF

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Publication number
WO1988002530A1
WO1988002530A1 PCT/FR1986/000340 FR8600340W WO8802530A1 WO 1988002530 A1 WO1988002530 A1 WO 1988002530A1 FR 8600340 W FR8600340 W FR 8600340W WO 8802530 A1 WO8802530 A1 WO 8802530A1
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WIPO (PCT)
Prior art keywords
matrix
cells
liquid crystals
liquid crystal
light source
Prior art date
Application number
PCT/FR1986/000340
Other languages
French (fr)
Inventor
Patrick Rioual
Original Assignee
Patrick Rioual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to FR8504745A priority Critical patent/FR2579808B1/en
Application filed by Patrick Rioual filed Critical Patrick Rioual
Priority to PCT/FR1986/000340 priority patent/WO1988002530A1/en
Publication of WO1988002530A1 publication Critical patent/WO1988002530A1/en

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4298—Coupling light guides with opto-electronic elements coupling with non-coherent light sources and/or radiation detectors, e.g. lamps, incandescent bulbs, scintillation chambers
    • 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

  • Fiber optic display device associated with liquid crystals.
  • the invention relates to a display device including La vi sua surface L i i sat one is constituted by the extreme ensem- b
  • the an optical fiber bundle faces the caf es extremes
  • the second end fibers of this same bundle being attached to a matrix of ceLLuLes of liquid crystals, the number and arrangement of which are in correspondence with those of said end faces of this second end, a microprocessor being connected to said matrix to control the passage of the Light through these liquid crystals.
  • each end face of the optical fibers constitutes a display point often called a pixel.
  • Liquid crystals have the property of allowing themselves to be traversed by light or not, depending on the electrical signal applied to them.
  • the idea of using them as shutters ordered in front of optical fibers has already been proposed (see document US-A-4,299,447) but a technical difficulty of implementation has not been overcome and this idea has remained unexploited.
  • the cells of a matrix of liquid crystals are spaced apart from one another. This space is variable and is around fifty microns. So that the end face of each fiber of the bundle is placed exactly opposite in correspondence respectively with a liquid crystal cell of the matrix, it would also be necessary for the ends of the fibers to be spaced apart from each other by the same distance.
  • the main purpose of the invention is to provide a device of the type defined above in which the technical difficulty mentioned above is completely overcome.
  • a display device comprising a light source, a matrix comprising numerous liquid crystal cells placed in front of this light source, a bundle of optical fibers each having at one first end an end face arranged exactly opposite respectively of a corresponding cell, and at a second end a visible end face, the visible end faces of the optical fibers being arranged on a display surface or they each constitute a display point according to the invention
  • the matrix of the cells liquid crystal comprises several plates called displays placed one after the other between the light source and the optical fiber bundle and each carrying respectively a part of the liquid crystal cells to which a display point corresponds, while the end faces optical fibers are arranged tangential to each other next to said liquid crystal cells 4.
  • liquid crystal cells used by the invention are known per se and commercially available.
  • colored filters are interposed between the light source and the matrix of liquid crystals, which makes it possible to create colored images on the display surface.
  • the plates or displays of the matrix are two in number on which the cells which each correspond to a display point are arranged in complementary checkers, that is to say in checkers whose projection on a plane reconstructs a set corresponding to the set of corresponding end faces of the optical fibers.
  • FIG. 1 is an exploded view schematically showing a matrix of Liquid crystal cells distributed in a checkerboard pattern on two plates and the end faces of the optical fibers of a bundle of fibers,
  • FIG. 2 is an exploded view schematically showing three colored filters with three basic colors and the matrix of liquid crystal cells supposed to be superimposed and supposed to be made transparent to light at certain points,
  • FIG. 3 shows the display surface which corresponds to FIG. 2,
  • Figure 4 is a general side view, schematic, of a device according to the invention.
  • the end faces of the fibers 5 will be arranged contiguous ent or tangentially as i l is faci le to do it.
  • the matrix 4 of liquid crystals is composed of two plates 4 each having a part of the cells arranged and 2 in checkerboard form 1 / which are complementary; after superimposition we obtain a matrix whose ———
  • the liquid crystal displays consist of two thin glass plates between which the various constituent elements are taken in sanswich.
  • the matrix 3 of the invention can be produced on the same principle but by means of three glass plates, the central plate of which carries electrodes on its two opposite faces, which makes it possible to obtain the two complementary checkers 1 and 2 on the same display.
  • a microprocessor 11 manages these two checkers s subsequently to make the cells 4 more or less transparent or opaque.
  • a series of filters 6, 7 and 8 are placed in front of the matrix 3. These filters are produced from known colored liquid crystals available commercially. Depending on the electrical signal applied to them * , these filters have the property of coloring or not the light passing through them. Reference will be made to FIG. 2 to describe a color display, with the device of the invention.
  • the display pattern is broken down into as many colored images as there are filters.
  • the configuration of the matrix 3 which corresponds to the pattern which it is desired to view can have been stored in a memory associated with the microprocessor 11, or come from a camera, or any other suitable system.
  • a complete device is shown on La ⁇ gure 4.
  • the lighting is provided by a light source 10.
  • the device of the invention operates in black and b Lanc.
  • This beam can be used as a simple image guide to, for example, produce a display in an aquatic environment; it can also be used to enlarge the displayed motif.
  • the end faces of the fibers 5 will be arranged side by side tangent ie 11ement, each of them corresponding to a cell 4 of the matrix 3, then, while retaining the same scheduling, they are led to 'to the viewing surface 9.
  • the 25 end faces of the fibers at this second end of the beam correspond to the desired enlargement.
  • thermoforming of a lens at the end of the fibers to obtain a concentration of the light point thermoforming of a lens at the end of the fibers to obtain a concentration of the light point
  • installation of a frosted glass ... (see French patents n ° 2.524.745; 2.530.850; ).

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

Abstract

Between the light source (10) and the extreme faces of one end of the fibres (5) of a bundle of optical fibres (12) is arranged an array (3) of liquid crystal cells which are distributed between two plates or displays in a check pattern arrangement, which makes possible a simple and easy tangential positioning of said extreme faces of the fibre bundle.

Description

Dispositif d'affichage à fibres optiques associées à des cristaux liquides. Fiber optic display device associated with liquid crystals.
L' invention a pour objet un dispositif d'affichage dont La surface de v i sua L i sat i on est constituée par L'ensem- bLe des faces extrêmes d'un faisceau de fibres optiques, Les fac'es extrêmes de La seconde extrémité des fibres de ce même faisceau étant accolées à une matrice de ceLLuLes de cristaux Liquides dont Le nombre et La disposition sont en correspon¬ dance avec ceux desdites faces extrêmes de cette seconde extrémité, un microprocesseur étant relié à Ladite matrice pour contrôler Le passage de La Lumière à travers ces cristaux l quides. Avec ce montage chaque face extrême des fibres optiques constitue un point d'affichage appelé souvent pixel.The invention relates to a display device including La vi sua surface L i i sat one is constituted by the extreme ensem- bThe an optical fiber bundle faces the caf es extremes The second end fibers of this same bundle being attached to a matrix of ceLLuLes of liquid crystals, the number and arrangement of which are in correspondence with those of said end faces of this second end, a microprocessor being connected to said matrix to control the passage of the Light through these liquid crystals. With this arrangement, each end face of the optical fibers constitutes a display point often called a pixel.
On sait que les cristaux Liquides ont La propriété de se Laisser ou non traverser par La Lumière en fonction du signal électrique qui leur est appliqué. L'idée de Les utiliser comme des obturateurs commandés devant des fibres optiques a déjà été proposée (voir le document US-A-4 299 447) mais une difficulté technique de réalisation n'a pas été 'surmontée et cette idée est restée inexploitée. En effet, par suite d'impératifs de fabrication, les cellules d'une matrice de cristaux liquides sont espacées Les unes, des autres. Cet espace est variable et se situe aux alentours de cinquantes microns. Pour que la face extrême de chaque fibre du faisceau soit mise exactement en face en correspondance respectivement avec une cellule de cristaux Liquides de la matrice, il faudrait également que les extré¬ mités des fibres soient espacées Les unes des autres de la même distance. Or, il est actuellement pratiquement impossible de respecter cet impératif dans La confection d'un faisceau de fibres optiques. De plus, la moindre erreur de position¬ nement d'une fibre par rapport à La cellule qui lui correspond entrave le bon fonctionnement du dispositif. Le but principal de l'invent on est d'apporter un dispositif du type défini ci-dessus dans lequel la difficulté technique mentionnée plus haut est totalement surmontée.We know that Liquid crystals have the property of allowing themselves to be traversed by light or not, depending on the electrical signal applied to them. The idea of using them as shutters ordered in front of optical fibers has already been proposed (see document US-A-4,299,447) but a technical difficulty of implementation has not been overcome and this idea has remained unexploited. In fact, as a result of manufacturing imperatives, the cells of a matrix of liquid crystals are spaced apart from one another. This space is variable and is around fifty microns. So that the end face of each fiber of the bundle is placed exactly opposite in correspondence respectively with a liquid crystal cell of the matrix, it would also be necessary for the ends of the fibers to be spaced apart from each other by the same distance. However, it is currently practically impossible to comply with this imperative in the making of a bundle of optical fibers. In addition, the slightest positioning error of a fiber relative to the cell which corresponds to it hinders the proper functioning of the device. The main purpose of the invention is to provide a device of the type defined above in which the technical difficulty mentioned above is completely overcome.
Dans un disposit f d'affichage comprenant une source de lumière, une matrice comprenant de nombreuses cellules de cris- taux liquides placée devant cette source de lumière, un faisceau de fibres optiques ayant chacune à une première extrémité une face extrême d sposée exactement en regard respectivement d'une cellule correspondante, et à une seconde extrémité une face extrême visible, les faces extrêmes v sibles des fibres optiques étant disposées sur une surface de visualisation ou elles constituent chacune un point d'affichage selon l'invention la matrice des cellules de cristaux liquides comprend plusieurs plaques appelées afficheurs placées les unes à la suite des autres entre La source de Lumière et Le faisceau de fibres optiques et portant chacune respectivement une parties des cellules de cristaux liquides auxquelles correspondent un point d'affichage, cependant que les faces extrêmes des fibres optiques sont disposées tangenti elle ent les unes aux autres en regard desdites cellules 4 de cristaux liquides.In a display device comprising a light source, a matrix comprising numerous liquid crystal cells placed in front of this light source, a bundle of optical fibers each having at one first end an end face arranged exactly opposite respectively of a corresponding cell, and at a second end a visible end face, the visible end faces of the optical fibers being arranged on a display surface or they each constitute a display point according to the invention the matrix of the cells liquid crystal comprises several plates called displays placed one after the other between the light source and the optical fiber bundle and each carrying respectively a part of the liquid crystal cells to which a display point corresponds, while the end faces optical fibers are arranged tangential to each other next to said liquid crystal cells 4.
Les cellules de cristaux liquides utilisées par l'invention sont connues en soi et disponibles dans le commerce.The liquid crystal cells used by the invention are known per se and commercially available.
Selon une variante de l'invention des filtres colorés sont interposés entre la source de lumière et la matrice de cristaux liquides, ce qui permet de cré e r sur la surface de visualisation des images colorées. De préférence, les plaques ou afficheurs de la ma¬ trice sont au nombre de deux sur lesquelles les cellules qui coi— respondent chacune à un point d'affichage sont disposées en damiers complémentaires, c'est-à-dire en damiers dont la projection sur un plan reconstitue un ensemble correspondant à L'ensemble des faces extrêmes correspondantes des fibres optiques. On donnera maintenant une description d'un mode préfÀré de réalisation de L ' invention. On se reportera aux dessins annexés dans lesquels :According to a variant of the invention, colored filters are interposed between the light source and the matrix of liquid crystals, which makes it possible to create colored images on the display surface. Preferably, the plates or displays of the matrix are two in number on which the cells which each correspond to a display point are arranged in complementary checkers, that is to say in checkers whose projection on a plane reconstructs a set corresponding to the set of corresponding end faces of the optical fibers. A description will now be given of a preferred embodiment of the invention. Reference is made to the appended drawings in which:
- la figure 1 est une vue éclatée montrant schéma- tiquement une matrice de cellules de cristaux Liquides réparties en damiers sur deux plaques et les faces extrêmes des fibres optiques d'un faisceau de fibres,FIG. 1 is an exploded view schematically showing a matrix of Liquid crystal cells distributed in a checkerboard pattern on two plates and the end faces of the optical fibers of a bundle of fibers,
- la figure 2 est une vue éclatée montrant schéma- tiquement trois fi ltres colorés aux trois couleurs fondamen¬ tales et la matrice des cellules de cristaux Liquides supposées superposées et supposées rendues transparentes à la lumière en certains points,FIG. 2 is an exploded view schematically showing three colored filters with three basic colors and the matrix of liquid crystal cells supposed to be superimposed and supposed to be made transparent to light at certain points,
- la figure 3 montre La surface de visualisation qui correspond à La figure 2 ,FIG. 3 shows the display surface which corresponds to FIG. 2,
La figure 4 est une vue générale de côté, schématique, d'un dispositif selon l 'invention. _ Sur La figure 1, les faces extrêmes des fibres 5 seront disposées jointive ent ou tangentielLement comme i l est faci le de le fai re.Figure 4 is a general side view, schematic, of a device according to the invention. _ In Figure 1, the end faces of the fibers 5 will be arranged contiguous ent or tangentially as i l is faci le to do it.
La matrice 4 de cristaux liquides est composée de deux plaques 4 ayant chacune une partie des cellules disposées et 2 en damiers 1/ qui sont complémentai res; après superposition on obtient une matrice dont la ———The matrix 4 of liquid crystals is composed of two plates 4 each having a part of the cells arranged and 2 in checkerboard form 1 / which are complementary; after superimposition we obtain a matrix whose ———
Figure imgf000005_0001
projection des cellules 4 coïncide parfaitement aux faces extrêmes jointives 5 du faisceau 12. On sait que Les affi¬ cheurs à cristaux liquides sont constitués de deux fines plaques de verre entre lesquelles les différents éléments constitutifs sont pris en sanswich. La matrice 3 de l'inven¬ tion peut être réalisée sur le même principe mais au moyen de trois plaques de verre dont la plaque centrale porte des électrodes sur ses deux faces opposées, ce qui permet d'obtenir les deux damiers complémentaires 1 et 2 sur un même afficheur. Un microprocesseur 11 gère ces deux damiers s ultanément pour rendre les cellules 4 plus ou moins transparentes ou opaques.
Figure imgf000005_0001
projection of the cells 4 coincides perfectly with the contiguous end faces 5 of the bundle 12. It is known that the liquid crystal displays consist of two thin glass plates between which the various constituent elements are taken in sanswich. The matrix 3 of the invention can be produced on the same principle but by means of three glass plates, the central plate of which carries electrodes on its two opposite faces, which makes it possible to obtain the two complementary checkers 1 and 2 on the same display. A microprocessor 11 manages these two checkers s subsequently to make the cells 4 more or less transparent or opaque.
Selon une caractéristique supplémentaire de l'invention, on place une série de f ltres 6, 7 et 8 devant la matrice 3. Ces filtres sont réalisés à partir de cristaux liquides colorés connus disponibles dans le commerce. En fonction du signal électrique qui leur est appliqué*, ces filtres ont la propriété de colorer ou non la lumière qui les traverse. On se reportera à la figure 2 pour décrire un affichage en couleurs, avec le dispositif de l'invention.According to an additional characteristic of the invention, a series of filters 6, 7 and 8 are placed in front of the matrix 3. These filters are produced from known colored liquid crystals available commercially. Depending on the electrical signal applied to them * , these filters have the property of coloring or not the light passing through them. Reference will be made to FIG. 2 to describe a color display, with the device of the invention.
Le motif visualiser est décomposé en autant d'images colorées qu'il y a de filtres.The display pattern is broken down into as many colored images as there are filters.
Pour chaque image, l'un des filtres 6,7 ouFor each image, one of the filters 6.7 or
8 colore la lumière, la matrice 3 adoptant sous la commande du microprocesseur 11 une configuration telle qu'elle ne se laisse traverser qu'aux endroits où la couleur du filtre est souhaitée ; cette opération s'effectue, successivement pour chacun des filtres.8 colors the light, the matrix 3 adopting under the control of the microprocessor 11 a configuration such that it can only be passed through at the places where the color of the filter is desired; this operation is carried out successively for each of the filters.
Quand ce processus est répété à une itesse suffisamment élevée, grâce au phénomène de La persistance rétinienne, on ne perçoit pas les différentes images mais on "voit" dans sa totalité le motif coloré ainsi créé, When this process is repeated at a sufficiently high rate, thanks to the phenomenon of Retinal Persistence, we do not perceive the different images but we "see" in its entirety the colored pattern thus created,
(figure 3) .(figure 3).
La configuration de la matrice 3 qui correspond au motif que l'on désire v.isualiser peut avoir été stockée dans une mémoire associée au microprocesseur 11, ou provenir d'une caméra, ou tout autre système adapté. Un dispositif complet est représenté sur La τιgure 4. L'éclairage est fourni par une source de lumière 10.The configuration of the matrix 3 which corresponds to the pattern which it is desired to view can have been stored in a memory associated with the microprocessor 11, or come from a camera, or any other suitable system. A complete device is shown on La τιgure 4. The lighting is provided by a light source 10.
IL est possible de placer un filtre 13 pour arrêter les rayons infrarouges entre la lampe 10 et les cristaux liquides, afin de protéger' ces derniers contre L ' échauffe ent . 5 La couleur est obtenue grâce aux trois filtresIt is possible to place a filter 13 to stop the infrared rays from the lamp 10 and the liquid crystal in order to protect 'the latter against The heats ent. 5 The color is obtained thanks to the three filters
6, 7, 8 (par exemple un rouge, un bleu et un jaune). En L'absence de filtres, le dispositif de l'invention fonctionne en noir et b Lanc .6, 7, 8 (e.g. red, blue and yellow). In the absence of filters, the device of the invention operates in black and b Lanc.
En faisant se succéder différentes vues de 10 constitution d'un motif à une cadence convenable suffisamment rapide , il est possible de créer vingt cinq vues par seconde et d'obtenir ainsi un motif animé.By making successive different views of constituting a pattern at a suitable rate sufficiently rapid, it is possible to create twenty five views per second and thus obtain an animated pattern.
On expliquera maintenant plus en détail la disposition du faisceau de fibres optiques 12, (on utilisera ' 15 de préférence de la fibre synthétique en raison de son faible coût et de sa plus grande maniabilité). Ce faisceau peut être utilisé comme simple guide d'images pour, par exemple, produire un affichage dans un milieu aquatique; il peut servir aussi à agrandir Le motif affiché. A L'une 20 des extrémités, Les faces extrêmes des fibres 5 seront disposées côte à côte tangent i e 11ement, chacune d'elles correspondant à une cellule 4 de la matrice 3, puis, tout en conservant le même ordonnancement, elles sont conduites jusqu'à la surface de visualisation 9. Sur celle-ci les 25 faces extrêmes des fibres à cette seconde extrémité du faisceau correspondent à l'agrandissement voulu. Un intervalle de l'ordre du illimètre ne pose pas de problèmes - pour la réalisation du faisceau, d'autant plus que de légères erreurs de pos tionnement n'auraient pas de conséquences 30 sur le fonctionnement du système. L'utilisation des fibres est utile également par le fait qu'elles permettent d'augmen¬ ter l'angle de visualisation de l'affichage.Now we will explain in more detail the arrangement of the fiber optic bundle 12, (we use '15 preferably synthetic fiber because of its low cost and its greater maneuverability). This beam can be used as a simple image guide to, for example, produce a display in an aquatic environment; it can also be used to enlarge the displayed motif. At one of the ends 20, the end faces of the fibers 5 will be arranged side by side tangent ie 11ement, each of them corresponding to a cell 4 of the matrix 3, then, while retaining the same scheduling, they are led to 'to the viewing surface 9. On the latter, the 25 end faces of the fibers at this second end of the beam correspond to the desired enlargement. An interval of the order of the illimeter does not pose any problems - for the production of the beam, all the more since slight positioning errors would have no consequences on the operation of the system. The use of fibers is also useful in that they allow the display angle of the display to be increased.
En fonction des besoins, divers moyens peuvent être adoptés pour réaliser cette surface de visualisation 35 et ont déjà été décrits dans de nombreux brevets : thermofor¬ mage d'une Lentille à l'extrémité des fibres pour obtenir une concentration du point lumineux, mise en place d'un verre dépoli... (voir brevets français n° 2.524.745 ; 2.530.850 ; ...).Depending on requirements, various means can be adopted to produce this viewing surface 35 and have already been described in numerous patents: thermoforming of a lens at the end of the fibers to obtain a concentration of the light point, installation of a frosted glass ... (see French patents n ° 2.524.745; 2.530.850; ...).
L'assemblage de plusieurs dispositifs permet d'envisager la réalisation d'écrans géants d'un coût relati¬ vement bas. The assembly of several devices makes it possible to envisage the production of giant screens at a relatively low cost.

Claims

REVENDICATIONS
1. Dispositif d'aff chage comprenant une source de lumière (10), une matrice (3) comprenant de nombreuses cellules (4) de cristaux liquides placée devant cette source de lumière, un faisceau (2) de fibres optiques (5) ayant chacune à une première extrémité une face extrême disposée exactement en regard respectivement d'une cellule correspon¬ dante, et à une seconde extrémité une face extrême visible, les faces extrêmes visibles des fibres' optiques (5) étant disposées sur une surface de visualisation (9) où elles constituent chacune un point d'affichage, caractérisé en ce que la matrice (3) des cellules de cristaux liquides (4) comprend plusieurs plaques (1, 2) appelées afficheurs placées les unes à la suite des autres entre La source de lumière (10) et Le faisceau de fibres optiques (12) et portant chacune respectivement une partie des cellules (4) de cristaux liquides auxquelles correspond un point d'affichage, cependant que les faces extrêmes des fibres optiques (5) sont disposées tangent i el Lement en regard desdites cellules (4) de cristaux liquides. 1. Display device comprising a light source (10), a matrix (3) comprising numerous cells (4) of liquid crystals placed in front of this light source, a bundle (2) of optical fibers (5) having each at one end an end face positioned exactly facing respectively a correspon¬ cell Dante, and at a second end an end face, visible end faces of the fiber optical (5) being disposed on a viewing surface ( 9) where they each constitute a display point, characterized in that the matrix (3) of the liquid crystal cells (4) comprises several plates (1, 2) called displays placed one after the other between the source of light (10) and The bundle of optical fibers (12 ) and each carrying respectively a part of the cells (4) of liquid crystals to which a display point corresponds, while the end faces of the fibers op ticks (5) are disposed tangent i el Lement opposite said liquid crystal cells (4).
2. Dispositif selon la revendication 1 caractérisé en ce que les plaques ou afficheurs de la matrice sont au nombre de deux sur Lesquelles les cellules (4) qui correspon¬ dent chacune à un point d ''affichage sont disposées en damiers complémentaires c'est-à-dire en damiers dont La projection sur un plan re.constitue un ensemble correspondant à l'ensem¬ ble des faces extrêmes correspondantes des fibres optiques.2. Device according to claim 1 characterized in that the plates or displays of the matrix are two in number on which the cells (4) which each correspond to a display point are arranged in complementary checkerboards that is ie checkerboard whose projection on a plane re.constitutes a set corresponding to all of the corresponding end faces of the optical fibers.
3. Dispositif selon l'une quelconque des revendi¬ cations 1, 2 caractérisé en ce que des filtres colorés (6, 7, de cristaux liquides 8) / s.ont interposes entre la source de lumière (10) et la matrice (3) de cellules (4) de cristaux liquides, ces filtres colorés (6, 7, 8) étant gérés par un microprocesseur (11) et colorant, à tour de rôle, La lumière émise par la lampe (10) traversant la matrice (3). 3. Device according to any one of the claims 1, 2 characterized in that colored filters (6, 7, of liquid crystals 8) / s. Are interposed between the light source (10) and the matrix (3 ) of liquid crystal cells (4), these colored filters ( 6, 7, 8) being managed by a microprocessor (11) and coloring, in turn, the light emitted by the lamp (10) passing through the matrix (3 ).
4. Dispositif selon les revendications 3 et 4 caractérisé en ce que pour chacun des filtres (6, 7, 8), La matrice (3), gérée par le microprocesseur (11), adopte une configuration telle qu'elle ne laisse passer la lumière qu'aux endroits où la couleur du filtre est souhaitée, cette opération s1 effectuant successivement pour chacune des couleurs sous le contrôle dudit microprocesseur (11). 4. Device according to claims 3 and 4 characterized in that for each of the filters (6, 7, 8), The matrix (3), managed by the microprocessor (11), adopts a configuration such that it does not allow the light spots only where the color filter is desired, this operation 1 s performing successively for each color under control of said microprocessor (11).
PCT/FR1986/000340 1985-03-29 1986-10-02 Display device with optical fibres associated with liquid crystals WO1988002530A1 (en)

Priority Applications (2)

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FR8504745A FR2579808B1 (en) 1985-03-29 1985-03-29 COLOR DISPLAY WITH FIBER OPTICS AND LIQUID CRYSTALS
PCT/FR1986/000340 WO1988002530A1 (en) 1986-10-02 1986-10-02 Display device with optical fibres associated with liquid crystals

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2246231A (en) * 1990-07-20 1992-01-22 Marconi Gec Ltd Liquid crystal displays.
US5394167A (en) * 1992-02-27 1995-02-28 Securite Et Signalisation Display device

Citations (5)

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GB1433327A (en) * 1972-03-17 1976-04-28 Axbey P J Display devices
GB1569516A (en) * 1977-02-16 1980-06-18 Suwa Seikosha Kk Display device
DE3006052A1 (en) * 1979-02-20 1981-01-08 Sharp Kk LIQUID CRYSTAL DISPLAY CELL
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