EP1820071B1 - Electronic device comprising a light guide provided with at least two interleaved sequentially illuminated light extractor groups - Google Patents

Electronic device comprising a light guide provided with at least two interleaved sequentially illuminated light extractor groups Download PDF

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Publication number
EP1820071B1
EP1820071B1 EP05803063A EP05803063A EP1820071B1 EP 1820071 B1 EP1820071 B1 EP 1820071B1 EP 05803063 A EP05803063 A EP 05803063A EP 05803063 A EP05803063 A EP 05803063A EP 1820071 B1 EP1820071 B1 EP 1820071B1
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EP
European Patent Office
Prior art keywords
optical
electronic device
optical guide
extractors
light
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Application number
EP05803063A
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German (de)
French (fr)
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EP1820071A2 (en
Inventor
Pascal Winkler
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Asulab AG
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Asulab AG
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Priority to EP05803063A priority Critical patent/EP1820071B1/en
Publication of EP1820071A2 publication Critical patent/EP1820071A2/en
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    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00—Indicating the time by visual means
    • G04B19/30—Illumination of dials or hands
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G99/00—Subject matter not provided for in other groups of this subclass
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B45/00—Time pieces of which the indicating means or cases provoke special effects, e.g. aesthetic effects
    • G04B45/0015—Light-, colour-, line- or spot-effects caused by or on stationary parts
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G9/00—Visual time or date indication means
    • G04G9/0023—Visual time or date indication means by light valves in general
    • G04G9/0029—Details
    • G04G9/0035—Details constructional
    • G04G9/0041—Illumination devices

Definitions

  • the present invention relates to an electronic device such as a timepiece comprising a box closed by an ice and inside which is housed an optical device for forming a figurative image visible through said ice.
  • Timepieces of this type are known from the prior art.
  • the patent application EP 0 786 685 A1 filed January 16, 1997 in the name of SMH Management Services AG, describes a timepiece with a device for displaying a colored decorative pattern.
  • This document provides for the implementation of an optical valve located between a film on which is printed the decorative pattern and the ice of the timepiece. When the optical valve is not supplied with electrical energy, it appears black while when it is powered, it becomes transparent thus making visible the decorative pattern.
  • the optical valve is preferably made in the form of a liquid crystal cell carrying transparent electrodes on each of its main faces allowing the polarization of the liquid crystals.
  • the deposition of the electrodes on the faces of the cell uses a method whose costs are not negligible, particularly if the optical system is intended to be implemented on a device for the general public at low cost.
  • such an optical system has a significant complexity in terms of electrical connections as regards the power supply of the liquid crystal control electrodes.
  • the document WO 2004/09773 discloses an electronic device having sequentially activated optical guides and light sources.
  • the main object of the present invention is to overcome the aforementioned drawbacks of the prior art by providing a device, in particular for a timepiece, enabling the display of a decorative motif whose implementation can be carried out at a lower cost. .
  • the optical guide according to the present invention can be disposed on the dial of the timepiece, can perform the function of a dial, alternatively, or be made directly in the ice of the timepiece.
  • the light source is disposed at the periphery of the box so as not to be visible through the ice, for obvious aesthetic reasons.
  • the timepiece according to the invention has an attractive display for its wearer because the decorative pattern, or figurative image, thus obtained is light when the light source is powered, while the optical guide is almost invisible when the light source is not powered.
  • the formation of a multicolored figurative image can be provided by the implementation of a plurality of groups or networks of extractors in the optical guide, each group of extractors being associated with its own light source.
  • the different groups of extractors may be arranged in different regions of the optical guide or may be interwoven in the same region. It is possible to provide, alternatively or additionally, the superposition of two or more optical guides, each of the optical guides carrying at least one group of extractors.
  • FIGS 1 and 2 represent schematic views respectively in perspective and in section of an optical guide 1 according to the present invention.
  • FIG. 1 there is shown a possible arrangement of the optical guide 1 in a timepiece, namely between the dial 2 and the hands of the hours 3 and minutes 4.
  • the dial 2 and the needles 3 and 4 are of conventional type, the dial 2 with indexes 5 to indicate the position of the hours.
  • the dial and the optical guide each comprise a central opening 6, respectively 7, to allow the passage of the drive means of the needles 3 and 4, that is to say the hour wheel and the roadway (not shown on the figure 1 for the sake of clarity).
  • the optical guide 1 operates in collaboration with three diodes 8, identical or possibly of different colors, in order to form a figurative image visible above the dial 2 of the timepiece.
  • a single diode 8 is sufficient to form, in association with a network of optical extractors as described below, a figurative image.
  • the optical coupling between the light beam emitted by each of the diodes 8 with the optical guide 1 is performed through an input surface 9.
  • the input surfaces 9 each have substantially the shape of a portion of the cylinder shell, so that the beams emitted by the diodes are refracted at the entrance into the optical guide.
  • the angular aperture of each of the light beams is increased to cover most of the surface of the light guide.
  • the optical guide 1 has two main extended faces 10 and 11, represented on the figure 1 substantially shaped discs for illustrative purposes not limiting, connected to one another by a side face 12 in the general shape of a ring.
  • the input surfaces 9 of the light are formed in the lateral surface 12.
  • the optical guide 1 comprises a plurality of optical extractors 19, only one of which is visible on the figure 2 , formed on the extended face 11 located on the side of the dial 2.
  • the optical extractors 19, each of which has at least one reflection surface 20, are distributed along a predefined network on the extended face 11, such a network being defined to correspond to a precise figurative image, as explained below.
  • the reflection surface 20 has a normal (n) oriented to face the corresponding diode 8, with a certain predefined angle. Thus, a certain proportion of the light beams emitted by the diode 8 falls on the reflection surface 20, either in direct incidence or after one or more prior reflections on at least one of the extended faces 10 and 11.
  • the proportion of the light beams that interact with the reflection surface 20 can be adjusted according to certain geometrical parameters of a given extractor, in particular as a function of the distance separating the diode 8 from the reflection surface 20 and the height of the reflection. the optical extractor 19 with respect to the thickness of the optical guide 1. The skilled person will not encounter any particular difficulty to adapt these parameters according to his needs.
  • all the optical extractors intended to form a predefined figurative image, have the same angle with respect to the extended face. 11.
  • Such a characteristic has the consequence that the light beams falling on the reflection surfaces 20 are all deflected in the same direction.
  • each reflection surface 20 of the grating gives rise to the formation of a reflected light beam.
  • the set of reflected light beams forms a network of light beams giving rise to a figurative image in a given direction.
  • the angle between the reflection surface 20 and the extended face 11 is substantially 45 degrees, resulting in the formation of a figurative image in a direction substantially perpendicular to the extended face.
  • the wearer of the timepiece according to the present invention can see a bright image when looking at the dial in one direction substantially normal, provided of course that the diodes 8 are supplied with electrical energy.
  • the invention is not limited to the formation of a figurative image in a direction perpendicular to the dial.
  • the direction of formation of the figurative image is adjusted by the angle that the reflective surface forms with respect to the incident light beams, the normal (n) of the reflection surface corresponding to the bisector of the diode directions.
  • the optical guide 1 can be made of any material having the required qualities, including in particular the transparency vis-à-vis the propagation of light, especially in the visible range.
  • the optical waveguide can be made of a plastic material of the PMMA type, by injection, by replication, or by any other suitable method, the advantages of these solutions residing mainly in the ease of the corresponding manufacturing processes and in the lower part. cost price of the product obtained.
  • the reflection surfaces 20 constitute a set of pixels for forming a figurative image. Therefore, the smaller the reflective surfaces, the better the resolution and therefore the image quality.
  • the reflection surface 20 may have various shapes, planar or curved to modulate the shape of the reflected beam and make it slightly divergent, for example.
  • the optical extractors belonging to the same network have at least one common geometrical characteristic, namely that the normal to the reflection surface is contained in a plane which is both perpendicular to the optical waveguide 1 and to the surface of the light. corresponding entry 9.
  • This characteristic schematized on the figure 1 ensures that the extraction of light is optimal, which is more advantageous from the point of view of the electrical energy consumption of the timepiece in which the luminous decoration of the present invention is implemented.
  • the structure represented on the figure 1 implementing an optical guide 1 illuminated by three light sources advantageously makes it possible to form a multicolored image.
  • the light sources emit light radiation of different respective colors, each of these sources being associated with its own network of optical extractors.
  • each of the three optical extractor networks can be arranged in a region of the optical guide 1 located near the diode 8 associated with it, as shown diagrammatically in FIG. figure 1 .
  • each of the three networks is extended over a large part of the total surface of the optical waveguide, the latter possibly being interlaced.
  • An example of a figurative image obtained with such a configuration is described below, in connection with the detailed description of the Figures 3a, 3b, 3c and 3d .
  • FIGS. 3a to 3c schematically represent the figurative image formed by each of three networks of optical extractors cooperating with a given light source.
  • the timepiece corresponding to the diagrams of the figure 3 comprises three diodes 8 arranged substantially opposite the 6 o'clock positions (reference 8a on the figure 3 ), 2 hours (reference 8b) and 10 hours (reference 8c).
  • Each of the diodes 8a, 8b and 8c is associated with a given optical extractor network.
  • the figure 3a represents the figurative image formed, as it appears to the wearer of the timepiece according to the present invention, when the diode 8a is powered to emit light towards the network associated therewith.
  • Figures 3b and 3c represent the figurative images respectively formed during the operation of the diodes 8b and 8c.
  • the figure 3d represents the multicolored figurative image formed when the three diodes 8a, 8b and 8c are fed simultaneously.
  • the electronic circuits of the watch according to the present invention can be programmed in such a way that the three diodes 8a, 8b and 8c are powered simultaneously in response to the activation of a control member by the user.
  • the corresponding function has an interest beyond the simple aesthetic contribution, in that the formed figurative image is bright and can therefore allow the wearer of the watch to locate the position of the hands while he is in a dark environment.
  • the electronic circuits of the watch can be programmed so that the diodes 8a, 8b and 8c are fed sequentially in response to a different activation of the control member or in response to the activation of an additional control member. It is understood that the present invention is not limited to the nature and modes of operation of the or control members.
  • the three diodes are fed simultaneously in response to shock detected by an accelerometer arranged in the watch.
  • the wearer of the watch can view the fire of a fireworks followed by two sets of explosions.
  • two networks of optical extractors can be arranged on the same waveguide, for which the reflection directions of the light beams are different.
  • the two directions of reflection have an angle between them such that the two images formed constitute a stereogram when the observer places his eyes at a given distance above the optical guide.
  • FIG. 4 An example of a particular embodiment is shown on the figure 4 , schematically, in the form of a partial cross section of a timepiece incorporating a display device of a light pattern according to the present invention.
  • it is intended to drive an optical guide in a rotational movement about the drive axis of the hour and minute hands.
  • the timepiece 40 comprises at least a first and a second light source 8 arranged to emit light inside said optical guide according to different transmission directions, additional means 52, 54, 55 being provided for driving the optical guide 51 in rotation so that the plurality of optical extractors cooperates alternately with the first and the second light sources 8.
  • the timepiece 40 electromechanical comprises a bottom-middle 41, closed by a bezel 42 and a mirror 43.
  • a conventional type of electronic movement has been schematized by a block 44 to not clutter the figure.
  • the bottom-middle 41 can be made by plastic injection molding, a central pin 45 being formed in one piece with the bottom-middle, the function main purpose of the latter being to carry the roadway 46 and the hour wheel 47.
  • the roadway and the hour wheel are conventionally connected by means of a timer wheel 48, formed of a minute gear 49 and a timer wheel 50.
  • a dial 2 is surmounted by an optical guide 51 similar to the optical guide 1 described in connection with the description of the figure 1 .
  • the dial and the optical guide may be centered by the central pin 45 and / or maintained in their respective axial positions by conventional means (not shown), for example by resting on shoulders adapted to the middle part.
  • an additional intermediate mobile 52 whose pinion 53 meshes with the timer wheel 50.
  • the optical guide 51 has a shoulder 54 annular and perpendicular to its extended faces, disposed on the periphery of the optical guide and extending towards the movement of the timepiece.
  • the shoulder 54 carries a toothing 55 arranged on its inner surface and intended to mesh with the wheel 56 of the intermediate mobile 52. Because of the kinematic chain implemented between the pavement and the optical guide, the latter can be rotated in the same direction of rotation as the indicator hands (not shown).
  • the diode 8 is intended to have at least one diode 8 in a suitable location of the middle facing the optical guide 51, electrical connection means being provided for connecting the electrical terminals of the diode to the power terminals of the stack (symbolized with reference 57 on the figure 4 ) used for the power supply of the timepiece.
  • the diode 8 is advantageously arranged in a region of the middle part covered by the bezel to prevent it being visible through the ice of the timepiece.
  • diodes 8 are arranged, respectively, between the 1 o'clock and 2 o'clock positions, between the 4 o'clock and 5 o'clock positions, between the 7 o'clock and 8 o'clock positions, and between the 10 o'clock and 11 o'clock positions.
  • One or more input surfaces 9 similar to those described in connection with the description of the figure 1 may be provided at particular locations of the lateral face of the optical guide 51. In the case where four diodes are arranged in the timepiece, provision is made between one and four input surfaces 9.
  • the characteristics of the kinematic chain responsible for driving the optical guide are such that the optical guide 51 is driven at the same speed as the minute hand.
  • an optical extractor network 20 inside a region corresponding to one quadrant of the total surface of the optical guide 51, this quadrant being for example arranged in such a way that the minute hand constitutes the bisector.
  • the four diodes 8 emit light beams in different colors.
  • the quadrant carrying the network of optical extractors called decorative quadrant
  • the diodes 8 When the quadrant carrying the network of optical extractors, called decorative quadrant, is centered opposite one of the diodes 8, the latter being powered to emit light, the formation of a decorative pattern of luminous intensity is obtained. Max. When the decorative quadrant is in a position different from its centered position, as just defined, the luminous intensity of the formed decorative pattern decreases as the quadrant moves away from the centered position.
  • the wearer can activate the display of the decorative pattern, for example by the activation of a control member, the pattern having a color and a light intensity depending on the position of the minute hand with respect to the dial. the timepiece.
  • the decorative quadrant approaches the next diode.
  • the decorative pattern is formed with increasing light intensity as the bisector of the quadrant approaches the diode.
  • the optical extractor network 20 arranged on each decorative quadrant cooperates alternately with each of the diodes 8.
  • the optical extractor network 20 arranged on each quadrant is illuminated sequentially by each diode 8 .
  • the decorative pattern covers a larger area than a quadrant of the optical guide.
  • the optical guide 51 comprises a plurality of optical extractor networks without departing from the scope of the present invention, such as, for example, a quadrant network making it possible to simultaneously form four decorative patterns, the color of each pattern being different from those of the other reasons.
  • an optical guide (not shown) superimposed on the optical guide 51 and slaved to the rotation of the hour hand.
  • an optical guide of this type by driving it directly on the barrel of the hour wheel before putting the hour hand in place.
  • an additional set of diodes can be arranged in the middle, facing the additional optical guide.
  • the implementation of the present invention consists in producing the hour and minute indication discs in the form of two optical guides.
  • a first of the two optical guides then comprises a network of optical extractors which, when illuminated, form a light pattern having the shape of an hour hand.
  • the second optical guide includes an array of optical extractors which, when illuminated, form a light pattern in the form of a minute hand.
  • a diode 8 which is oriented orthogonally to an extended face 11 of the optical guide 1, that is to say that it emits light rays directed vertically vertically upward, while in the mode embodiment shown on the figure 2 , the diode 8 emits light rays directed globally orthogonally to the lateral face 12.
  • the diode 8 is here arranged under the optical guide 1, always in the vicinity of the side face 12.
  • the input surface 9 is here parallel to the extended faces 10, 11.
  • the peripheral portion 60 of the upper extended face 10 of the optical guide 1 is curved towards the lower extended face 11 so that the light rays, which are emitted by the diode 8 in the direction of the periphery of the optical guide 1, can be totally reflected on the peripheral portion 60 and move towards the reflection surfaces 20 associated with the diode 8.
  • This variant embodiment makes it possible to use diodes 8 called upward emission diodes, or “top emitting diodes”, relative to the face of the printed circuit board on which they are mounted, as opposed to so-called side emission diodes, or “side emitting diode”.
  • the diodes are not permanently powered for reasons of energy saving.
  • the display of light patterns respectively having the shape of the hour hand and the minute hand can be controlled by the electronic circuits of the watch in response to the activation of a control member, for example .
  • the timepiece then has an original and discreet appearance while providing excellent readability when the diodes are powered to implement the time display.
  • each of the optical extractors in the form a boss having at least one light-extracting surface through which the light is refracted as it exits the optical guide.
  • the optical guide is directly formed by the ice of the watch.
  • the ice includes optical extractors formed in its inner face, one or more light sources being arranged in the region of the telescope so as to emit light beams in the direction of the edge of the ice.

Abstract

The timepiece has an optical device with a set of optical extractors provided in one of extended sides of an optical guide. Each extractor has preset geometric characteristics and a reflection surface (20). Light sources (8) are disposed with respect to a lateral surface (12) of the guide in a predefined direction for transmitting light inside the guide and cooperate with the surfaces to form a figurative image. The figurative image is defined directly with respect to the geometrical characteristics, by reflection of light in the reflection surfaces.

Description

DOMAINE TECHNIQUETECHNICAL AREA

La présente invention concerne un dispositif électronique tel qu'une pièce d'horlogerie comportant une boîte fermée par une glace et à l'intérieur de laquelle est logé un dispositif optique destiné à former une image figurative visible au travers de ladite glace.The present invention relates to an electronic device such as a timepiece comprising a box closed by an ice and inside which is housed an optical device for forming a figurative image visible through said ice.

ARRIÈRE-PLAN TECHNOLOGIQUETECHNOLOGICAL BACKGROUND

Des pièces d'horlogerie de ce type sont connues de l'art antérieur. A titre d'exemple, la demande de brevet EP 0 786 685 A1, déposée le 16 janvier 1997 au nom de SMH Management Services AG, décrit une pièce d'horlogerie comportant un dispositif d'affichage d'un motif décoratif coloré. Ce document prévoit la mise en oeuvre d'une valve optique située entre un film sur lequel est imprimé le motif décoratif et la glace de la pièce d'horlogerie. Lorsque la valve optique n'est pas alimentée en énergie électrique, elle apparaît noire tandis que lorsqu'elle est alimentée, elle devient transparente rendant ainsi visible le motif décoratif.Timepieces of this type are known from the prior art. For example, the patent application EP 0 786 685 A1, filed January 16, 1997 in the name of SMH Management Services AG, describes a timepiece with a device for displaying a colored decorative pattern. This document provides for the implementation of an optical valve located between a film on which is printed the decorative pattern and the ice of the timepiece. When the optical valve is not supplied with electrical energy, it appears black while when it is powered, it becomes transparent thus making visible the decorative pattern.

Un tel système présente toutefois un certain nombre d'inconvénients, dont notamment un coût de fabrication important. La valve optique est préférablement réalisée sous la forme d'une cellule à cristaux liquides portant des électrodes transparentes sur chacune de ses faces principales permettant la polarisation des cristaux liquides. Ainsi, le dépôt des électrodes sur les faces de la cellule fait appel à un procédé dont les coûts sont non négligeables, en particulier si le système optique est destiné à être mis en oeuvre sur un dispositif pour le grand public à bas prix de revient. En outre, un tel système optique présente une complexité importante en termes de connectique électrique en ce qui concerne l'alimentation électrique des électrodes de commande des cristaux liquides.Such a system, however, has a number of disadvantages, including a significant manufacturing cost. The optical valve is preferably made in the form of a liquid crystal cell carrying transparent electrodes on each of its main faces allowing the polarization of the liquid crystals. Thus, the deposition of the electrodes on the faces of the cell uses a method whose costs are not negligible, particularly if the optical system is intended to be implemented on a device for the general public at low cost. In addition, such an optical system has a significant complexity in terms of electrical connections as regards the power supply of the liquid crystal control electrodes.

Le document WO 2004/09773 décrit un dispositif électronique comportant des guides optiques et des sources lumineuses activées séquentiellement.The document WO 2004/09773 discloses an electronic device having sequentially activated optical guides and light sources.

RÉSUMÉ DE L'INVENTIONSUMMARY OF THE INVENTION

La présente invention a pour but principal de pallier les inconvénients susmentionnés de l'art antérieur en fournissant un dispositif, notamment pour une pièce d'horlogerie, permettant l'affichage d'un motif décoratif dont la mise en oeuvre peut être effectuée à moindre coût.The main object of the present invention is to overcome the aforementioned drawbacks of the prior art by providing a device, in particular for a timepiece, enabling the display of a decorative motif whose implementation can be carried out at a lower cost. .

Les caractéristiques du dispositif électronique selon l'invention sont définies par les revendications de la présente demande.The characteristics of the electronic device according to the invention are defined by the claims of the present application.

Le guide optique selon la présente invention peut être disposé sur le cadran de la pièce d'horlogerie, peut remplir la fonction de cadran, de manière alternative, ou encore être réalisé directement dans la glace de la pièce d'horlogerie.The optical guide according to the present invention can be disposed on the dial of the timepiece, can perform the function of a dial, alternatively, or be made directly in the ice of the timepiece.

De manière préférée, la source lumineuse est disposée en périphérie de la boîte de manière à ne pas être apparente au travers de la glace, pour des raisons esthétiques évidentes.Preferably, the light source is disposed at the periphery of the box so as not to be visible through the ice, for obvious aesthetic reasons.

Grâce aux caractéristiques susmentionnées, la pièce d'horlogerie conformément à l'invention présente un affichage attractif pour son porteur du fait que le motif décoratif, ou image figurative, ainsi obtenu est lumineux lorsque la source lumineuse est alimentée, alors que le guide optique est quasiment invisible lorsque la source lumineuse n'est pas alimentée.Thanks to the aforementioned characteristics, the timepiece according to the invention has an attractive display for its wearer because the decorative pattern, or figurative image, thus obtained is light when the light source is powered, while the optical guide is almost invisible when the light source is not powered.

On peut avantageusement prévoir un grand nombre de variantes de réalisation du dispositif optique susmentionné.It is advantageous to provide a large number of alternative embodiments of the aforementioned optical device.

En particulier, on peut prévoir la formation d'une image figurative multicolore par la mise en oeuvre d'une pluralité de groupes ou réseaux d'extracteurs dans le guide optique, chaque groupe d'extracteurs étant associé à sa propre source lumineuse.In particular, the formation of a multicolored figurative image can be provided by the implementation of a plurality of groups or networks of extractors in the optical guide, each group of extractors being associated with its own light source.

D'autre part, on peut également prévoir l'affichage d'animations à une seule couleur ou multicolores, sur la base de la variante ci-dessus, en alimentant les sources lumineuses de manière séquentielle.On the other hand, one can also provide the display of single color or multicolored animations, based on the above variant, by feeding the light sources sequentially.

Les différents groupes d'extracteurs peuvent être agencés dans des régions différentes du guide optique ou encore être entrelacés dans une même région. On peut prévoir, de manière alternative ou complémentaire, la superposition de deux guides optiques ou plus, chacun des guides optiques portant au moins un groupe d'extracteurs.The different groups of extractors may be arranged in different regions of the optical guide or may be interwoven in the same region. It is possible to provide, alternatively or additionally, the superposition of two or more optical guides, each of the optical guides carrying at least one group of extractors.

D'autres variantes de réalisation seront abordées dans la description détaillée qui suit.Other alternative embodiments will be discussed in the detailed description which follows.

BRÈVE DESCRIPTION DES DESSINSBRIEF DESCRIPTION OF THE DRAWINGS

D'autres caractéristiques et avantages de la présente invention apparaîtront plus clairement à la lecture de la description détaillée qui suit, faite en référence aux dessins annexés donnés à titre d'exemples non limitatifs et dans lesquels:

  • la figure 1 représente une vue en perspective éclatée et schématique des moyens d'affichage d'une pièce d'horlogerie à affichage analogique selon un premier mode de réalisation préféré de la présente invention;
  • la figure 2 représente une vue en coupe du guide optique représenté sur la figure 1 ;
  • la figure 2bis est une vue similaire à celle de la figure 2 qui représente une variante de réalisation dans laquelle la source lumineuse est orientée orthogonalement à l'une des faces étendues du guide de lumière ;
  • les figures 3a, 3b, 3c et 3d représentent de manière schématique un exemple d'images formées successivement pour définir une animation, et
  • la figure 4 représente une vue en coupe simplifiée d'une pièce d'horlogerie selon une variante de réalisation de la présente invention.
Other features and advantages of the present invention will appear more clearly on reading the detailed description which follows, made with reference to the accompanying drawings given by way of non-limiting examples and in which:
  • the figure 1 represents an exploded and schematic perspective view of the display means of an analog display timepiece according to a first preferred embodiment of the present invention;
  • the figure 2 represents a sectional view of the optical guide shown on the figure 1 ;
  • the figure 2bis is a view similar to that of the figure 2 which represents an alternative embodiment in which the light source is oriented orthogonally to one of the extended faces of the light guide;
  • the Figures 3a, 3b, 3c and 3d schematically represent an example of images formed successively to define an animation, and
  • the figure 4 represents a simplified sectional view of a timepiece according to an alternative embodiment of the present invention.

DESCRIPTION DÉTAILLÉEDETAILED DESCRIPTION

Les figures 1 et 2 représentent des vues schématiques respectivement en perspective et en coupe d'un guide optique 1 selon la présente invention.The Figures 1 and 2 represent schematic views respectively in perspective and in section of an optical guide 1 according to the present invention.

Sur la figure 1, on a représenté une disposition possible du guide optique 1 dans une pièce d'horlogerie, à savoir entre le cadran 2 et les aiguilles des heures 3 et des minutes 4. Le cadran 2 et les aiguilles 3 et 4 sont de type conventionnel, le cadran 2 portant des index 5 pour indiquer la position des heures.On the figure 1 , there is shown a possible arrangement of the optical guide 1 in a timepiece, namely between the dial 2 and the hands of the hours 3 and minutes 4. The dial 2 and the needles 3 and 4 are of conventional type, the dial 2 with indexes 5 to indicate the position of the hours.

Le cadran et le guide optique comportent chacun une ouverture centrale 6, respectivement 7, pour permettre le passage des moyens d'entraînement des aiguilles 3 et 4, c'est-à-dire de la roue des heures et de la chaussée (non représentées sur la figure 1 dans un souci de clarté).The dial and the optical guide each comprise a central opening 6, respectively 7, to allow the passage of the drive means of the needles 3 and 4, that is to say the hour wheel and the roadway (not shown on the figure 1 for the sake of clarity).

Dans le mode de réalisation représenté sur la figure 1, le guide optique 1 fonctionne en collaboration avec trois diodes 8, identiques ou, éventuellement, de couleurs différentes, dans le but de former une image figurative visible au-dessus du cadran 2 de la pièce d'horlogerie.In the embodiment shown on the figure 1 , the optical guide 1 operates in collaboration with three diodes 8, identical or possibly of different colors, in order to form a figurative image visible above the dial 2 of the timepiece.

Du point de vue du principe de base, une seule diode 8 suffit pour former, en association avec un réseau d'extracteurs optiques tels que décrits plus loin, une image figurative.From the point of view of the basic principle, a single diode 8 is sufficient to form, in association with a network of optical extractors as described below, a figurative image.

De manière préférée, le couplage optique entre le faisceau lumineux émis par chacune des diodes 8 avec le guide optique 1 est effectué au travers d'une surface d'entrée 9. Les surfaces d'entrée 9 présentent chacune sensiblement la forme d'une portion d'enveloppe de cylindre, de manière que les faisceaux émis par les diodes sont réfractés à l'entrée dans le guide optique. Ainsi, l'ouverture angulaire de chacun des faisceaux lumineux se trouve augmentée pour permettre de couvrir la majeure partie de la surface du guide optique.Preferably, the optical coupling between the light beam emitted by each of the diodes 8 with the optical guide 1 is performed through an input surface 9. The input surfaces 9 each have substantially the shape of a portion of the cylinder shell, so that the beams emitted by the diodes are refracted at the entrance into the optical guide. Thus, the angular aperture of each of the light beams is increased to cover most of the surface of the light guide.

Le guide optique 1 présente deux faces principales étendues 10 et 11, représentées sur la figure 1 sensiblement en forme de disques à titre illustratif non limitatif, reliées l'une à l'autre par une face latérale 12 en forme générale d'anneau. Les surfaces d'entrée 9 de la lumière sont ménagées dans la surface latérale 12.The optical guide 1 has two main extended faces 10 and 11, represented on the figure 1 substantially shaped discs for illustrative purposes not limiting, connected to one another by a side face 12 in the general shape of a ring. The input surfaces 9 of the light are formed in the lateral surface 12.

Le principe de fonctionnement du système optique décrit en relation avec la figure 1 est schématisé sur la figure 2, sur laquelle le guide optique 1 est montré seul dans une vue en coupe transversale, suivant un plan coupant l'une des diodes 8.The principle of operation of the optical system described in connection with the figure 1 is schematized on the figure 2 , on which the optical guide 1 is shown alone in a cross-sectional view, in a plane intersecting one of the diodes 8.

Conformément à la présente invention, le guide optique 1 comporte une pluralité d'extracteurs optiques 19, dont un seul est visible sur la figure 2, ménagés sur la face étendue 11 située du côté du cadran 2.According to the present invention, the optical guide 1 comprises a plurality of optical extractors 19, only one of which is visible on the figure 2 , formed on the extended face 11 located on the side of the dial 2.

Les extracteurs optiques 19, dont chacun présente au moins une surface de réflexion 20, sont répartis suivant un réseau prédéfini sur la face étendue 11, un tel réseau étant défini pour correspondre à une image figurative bien précise, tel qu'exposé ci-dessous.The optical extractors 19, each of which has at least one reflection surface 20, are distributed along a predefined network on the extended face 11, such a network being defined to correspond to a precise figurative image, as explained below.

La surface de réflexion 20 présente une normale (n) orientée de façon à faire face à la diode 8 correspondante, avec un certain angle prédéfini. Ainsi, une certaine proportion des faisceaux lumineux émis par la diode 8 tombe sur la surface de réflexion 20, soit en incidence directe, soit après une ou plusieurs réflexions préalables sur au moins l'une des faces étendues 10 et 11.The reflection surface 20 has a normal (n) oriented to face the corresponding diode 8, with a certain predefined angle. Thus, a certain proportion of the light beams emitted by the diode 8 falls on the reflection surface 20, either in direct incidence or after one or more prior reflections on at least one of the extended faces 10 and 11.

La proportion des faisceaux lumineux qui interagissent avec la surface de réflexion 20 peut être ajustée en fonction de certains paramètres géométriques d'un extracteur donné, en particulier en fonction de la distance séparant la diode 8 de la surface de réflexion 20 et de la hauteur de l'extracteur optique 19 par rapport à l'épaisseur du guide optique 1. L'homme du métier ne rencontrera pas de difficulté particulière pour adapter ces paramètres en fonction de ses besoins.The proportion of the light beams that interact with the reflection surface 20 can be adjusted according to certain geometrical parameters of a given extractor, in particular as a function of the distance separating the diode 8 from the reflection surface 20 and the height of the reflection. the optical extractor 19 with respect to the thickness of the optical guide 1. The skilled person will not encounter any particular difficulty to adapt these parameters according to his needs.

Dans un premier temps, en ce qui concerne le mode de réalisation le plus général de la pièce d'horlogerie selon la présente invention, tous les extracteurs optiques, prévus pour former une image figurative prédéfinie, présentent un même angle par rapport à la face étendue 11. Une telle caractéristique a pour conséquence que les faisceaux lumineux tombant sur les surfaces de réflexion 20 sont tous déviés dans une même direction. Ainsi, chaque surface de réflexion 20 du réseau donne lieu à la formation d'un faisceau lumineux réfléchi. L'ensemble des faisceaux lumineux réfléchis forme un réseau de faisceaux lumineux donnant lieu à une image figurative dans une direction donnée.In a first step, with regard to the most general embodiment of the timepiece according to the present invention, all the optical extractors, intended to form a predefined figurative image, have the same angle with respect to the extended face. 11. Such a characteristic has the consequence that the light beams falling on the reflection surfaces 20 are all deflected in the same direction. Thus, each reflection surface 20 of the grating gives rise to the formation of a reflected light beam. The set of reflected light beams forms a network of light beams giving rise to a figurative image in a given direction.

Dans le cas particulier représenté sur la figure 2, l'angle entre la surface de réflexion 20 et la face étendue 11 est sensiblement de 45 degrés, entraînant la formation d'une image figurative dans une direction sensiblement perpendiculaire à la face étendue. Ainsi, le porteur de la pièce d'horlogerie selon la présente invention peut voir une image lumineuse lorsqu'il en regarde le cadran dans une direction sensiblement normale, sous réserve bien entendu que les diodes 8 sont alimentées en énergie électrique.In the particular case represented on the figure 2 the angle between the reflection surface 20 and the extended face 11 is substantially 45 degrees, resulting in the formation of a figurative image in a direction substantially perpendicular to the extended face. Thus, the wearer of the timepiece according to the present invention can see a bright image when looking at the dial in one direction substantially normal, provided of course that the diodes 8 are supplied with electrical energy.

Bien entendu, l'invention ne se limite pas à la formation d'une image figurative dans une direction perpendiculaire au cadran. On peut par exemple envisager de former l'image figurative dans une direction présentant un angle de l'ordre de 60 degrés par rapport au cadran, en direction de la position 6 heures, pour permettre au porteur de la visualiser sans tourner son avant-bras dans une mesure importante.Of course, the invention is not limited to the formation of a figurative image in a direction perpendicular to the dial. One can for example consider forming the figurative image in a direction having an angle of about 60 degrees relative to the dial, towards the 6 o'clock position, to allow the wearer to view without turning his forearm to a significant extent.

De manière générale, la direction de formation de l'image figurative est ajustée par l'angle que forme la surface de réflexion par rapport aux faisceaux lumineux incidents, la normale (n) de la surface de réflexion correspondant à la bissectrice des directions diode-surface de réflexion, d'une part, et surface de réflexion - observateur, d'autre part.In general, the direction of formation of the figurative image is adjusted by the angle that the reflective surface forms with respect to the incident light beams, the normal (n) of the reflection surface corresponding to the bisector of the diode directions. reflective surface, on the one hand, and reflecting surface - observer, on the other hand.

Le guide optique 1 peut être réalisé en tout matériau possédant les qualités requises, dont en particulier la transparence vis-à-vis de la propagation de la lumière, notamment dans le domaine visible. De manière préférée, on pourra réaliser le guide optique en un matériau plastique du type PMMA, par injection, par réplication, ou par tout autre procédé adapté, les avantages de ces solutions résidant principalement dans la facilité des procédés de fabrication correspondants et dans le bas prix de revient du produit obtenu.The optical guide 1 can be made of any material having the required qualities, including in particular the transparency vis-à-vis the propagation of light, especially in the visible range. In a preferred manner, the optical waveguide can be made of a plastic material of the PMMA type, by injection, by replication, or by any other suitable method, the advantages of these solutions residing mainly in the ease of the corresponding manufacturing processes and in the lower part. cost price of the product obtained.

D'après l'explication qui précède, on comprend que les surfaces de réflexion 20 constituent un ensemble de pixels permettant de former une image figurative. Par conséquent, plus les surfaces de réflexion sont de petites tailles, plus la résolution et donc la qualité de l'image sont bonnes.From the foregoing explanation, it is understood that the reflection surfaces 20 constitute a set of pixels for forming a figurative image. Therefore, the smaller the reflective surfaces, the better the resolution and therefore the image quality.

Comme déjà suggéré, il convient de noter que plus la hauteur d'un extracteur optique est importante, plus sa surface efficace est grande et donc, plus la quantité de lumière extraite du guide optique à l'endroit correspondant est importante. Ainsi, il en ressort que l'intensité lumineuse de chacun des faisceaux lumineux réfléchis peut être finement ajustée par le biais des caractéristiques de l'extracteur optique correspondant. Sur la base de cet ajustement, il devient possible de former une image figurative en "niveaux de gris" (dans la couleur de la diode employée) sur la base d'une source lumineuse unique.As already suggested, it should be noted that the higher the height of an optical extractor, the greater its effective area is large and therefore, the amount of light extracted from the optical guide at the corresponding location is important. Thus, it emerges that the luminous intensity of each of the reflected light beams can be finely adjusted by means of the characteristics of the corresponding optical extractor. On the basis of this adjustment, it becomes possible to form a "grayscale" figurative image (in the color of the diode employed) based on a single light source.

En ayant recours aux techniques de fabrication actuelles, il est envisageable de réaliser des extracteurs optiques présentant des dimensions de l'ordre de 10 µm. En outre, la surface de réflexion 20 peut présenter diverses formes, planes ou incurvées pour moduler la forme du faisceau réfléchi et le rendre légèrement divergent, par exemple.By using current manufacturing techniques, it is conceivable to make optical extractors with dimensions of the order of 10 microns. In addition, the reflection surface 20 may have various shapes, planar or curved to modulate the shape of the reflected beam and make it slightly divergent, for example.

De manière préférée, les extracteurs optiques appartenant à un même réseau présentent au moins une caractéristique géométrique commune, à savoir que la normale à la surface de réflexion est contenue dans un plan qui est à la fois perpendiculaire au guide optique 1 et à la surface d'entrée 9 correspondante. Cette caractéristique schématisée sur la figure 1 garantit que l'extraction de la lumière est optimale, ce qui est plus avantageux du point de vue de la consommation en énergie électrique de la pièce d'horlogerie dans laquelle le décor lumineux de la présente invention est mis en oeuvre.Preferably, the optical extractors belonging to the same network have at least one common geometrical characteristic, namely that the normal to the reflection surface is contained in a plane which is both perpendicular to the optical waveguide 1 and to the surface of the light. corresponding entry 9. This characteristic schematized on the figure 1 ensures that the extraction of light is optimal, which is more advantageous from the point of view of the electrical energy consumption of the timepiece in which the luminous decoration of the present invention is implemented.

La structure représentée sur la figure 1, mettant en oeuvre un guide optique 1 illuminé par trois sources lumineuses permet avantageusement de former une image multicolore.The structure represented on the figure 1 , implementing an optical guide 1 illuminated by three light sources advantageously makes it possible to form a multicolored image.

Dans ce but, on prévoit que les sources lumineuses émettent des radiations lumineuses de couleurs respectives différentes, chacune de ces sources étant associée à son propre réseau d'extracteurs optiques.For this purpose, it is expected that the light sources emit light radiation of different respective colors, each of these sources being associated with its own network of optical extractors.

Selon une variante de réalisation simple, chacun des trois réseaux d'extracteurs optiques peut être ménagé dans une région du guide optique 1 située à proximité de la diode 8 lui étant associée, tel que schématisé sur la figure 1.According to a simple variant embodiment, each of the three optical extractor networks can be arranged in a region of the optical guide 1 located near the diode 8 associated with it, as shown diagrammatically in FIG. figure 1 .

De manière alternative, on peut prévoir que chacun des trois réseaux est étendu sur une partie importante de la surface totale du guide optique, ceux-ci étant éventuellement entrelacés. Un exemple d'image figurative obtenue avec une telle configuration est décrit ci-dessous, en relation avec la description détaillée des figures 3a, 3b, 3c et 3d.Alternatively, it can be provided that each of the three networks is extended over a large part of the total surface of the optical waveguide, the latter possibly being interlaced. An example of a figurative image obtained with such a configuration is described below, in connection with the detailed description of the Figures 3a, 3b, 3c and 3d .

Les figures 3a à 3c représentent de manière schématique l'image figurative formée par chacun de trois réseaux d'extracteurs optiques coopérant avec une source lumineuse donnée.The Figures 3a to 3c schematically represent the figurative image formed by each of three networks of optical extractors cooperating with a given light source.

La pièce d'horlogerie correspondant aux schémas de la figure 3 comporte trois diodes 8, disposées sensiblement en regard des positions 6 heures (référence 8a sur la figure 3), 2 heures (référence 8b) et 10 heures (référence 8c).The timepiece corresponding to the diagrams of the figure 3 comprises three diodes 8 arranged substantially opposite the 6 o'clock positions (reference 8a on the figure 3 ), 2 hours (reference 8b) and 10 hours (reference 8c).

Chacune des diodes 8a, 8b et 8c est associée à un réseau d'extracteurs optiques donné. La figure 3a représente l'image figurative formée, telle qu'elle apparaît au porteur de la pièce d'horlogerie selon la présente invention, lorsque la diode 8a est alimentée pour émettre de la lumière en direction du réseau qui lui est associé. De même, les figures 3b et 3c représentent les images figuratives respectivement formées lors du fonctionnement des diodes 8b et 8c. La figure 3d représente l'image figurative multicolore formée lorsque les trois diodes 8a, 8b et 8c sont alimentées simultanément.Each of the diodes 8a, 8b and 8c is associated with a given optical extractor network. The figure 3a represents the figurative image formed, as it appears to the wearer of the timepiece according to the present invention, when the diode 8a is powered to emit light towards the network associated therewith. Similarly, Figures 3b and 3c represent the figurative images respectively formed during the operation of the diodes 8b and 8c. The figure 3d represents the multicolored figurative image formed when the three diodes 8a, 8b and 8c are fed simultaneously.

Sur la base d'une telle structure à trois diodes et trois réseaux d'extracteurs optiques entrelacés, on peut prévoir une pluralité de modes de fonctionnement.On the basis of such a three-diode structure and three interleaved optical extractor arrays, a plurality of modes of operation may be provided.

On peut par exemple programmer les circuits électroniques de la montre selon la présente invention de telle manière que les trois diodes 8a, 8b et 8c sont alimentées simultanément en réponse à l'activation d'un organe de commande par l'utilisateur. La fonction correspondante présente un intérêt au-delà du simple apport esthétique, en ce que l'image figurative formée est lumineuse et peut donc permettre au porteur de la montre de repérer la position des aiguilles alors qu'il se trouve dans un environnement sombre.For example, the electronic circuits of the watch according to the present invention can be programmed in such a way that the three diodes 8a, 8b and 8c are powered simultaneously in response to the activation of a control member by the user. The corresponding function has an interest beyond the simple aesthetic contribution, in that the formed figurative image is bright and can therefore allow the wearer of the watch to locate the position of the hands while he is in a dark environment.

De manière alternative ou complémentaire, les circuits électroniques de la montre peuvent être programmés pour que les diodes 8a, 8b et 8c soient alimentées de manière séquentielle en réponse à une activation différente de l'organe de commande ou en réponse à l'activation d'un organe de commande supplémentaire. Il est bien entendu que la présente invention n'est pas limitée à la nature et aux modes de fonctionnement du ou des organes de commande.Alternatively or additionally, the electronic circuits of the watch can be programmed so that the diodes 8a, 8b and 8c are fed sequentially in response to a different activation of the control member or in response to the activation of an additional control member. It is understood that the present invention is not limited to the nature and modes of operation of the or control members.

Selon cette alternative, on constate que les trois réseaux d'extracteurs sont illuminés de manière séquentielle grâce à l'allumage séquentiel des diodes 8a, 8b et 8c.According to this alternative, it can be seen that the three networks of extractors are illuminated sequentially thanks to the sequential ignition of the diodes 8a, 8b and 8c.

A titre d'exemple, on pourra prévoir que les trois diodes sont alimentées simultanément en réponse à un choc détecté par un accéléromètre agencé dans la montre.For example, it can be provided that the three diodes are fed simultaneously in response to shock detected by an accelerometer arranged in the watch.

Suivant un mode de fonctionnement de type séquentiel, on obtient l'affichage d'une animation multicolore, à savoir le tir d'un feu d'artifice dans le cas de l'exemple représenté sur les figures 3a à 3d.According to a mode of sequential type operation, one obtains the display of a multicolored animation, namely the firing of a firework in the case of the example shown on the Figures 3a to 3d .

Sur la figure 3a, on a schématisé l'affichage de la première image figurative de l'animation, obtenue par la collaboration des faisceaux lumineux émis par la première diode 8a avec un premier réseau d'extracteurs optiques. Le porteur de la montre peut voir une image figurative lumineuse symbolisant la traînée laissée par des fusées au cours d'un feu d'artifice depuis le dessus du cadran.On the figure 3a , we have schematized the display of the first figurative image of the animation, obtained by the collaboration of the light beams emitted by the first diode 8a with a first network of optical extractors. The wearer of the watch can see a luminous figurative image symbolizing the trail left by rockets during a firework from the top of the dial.

Sur la figure 3b, on a schématisé l'affichage de la seconde image figurative de l'animation, obtenue par la collaboration des faisceaux lumineux émis par la seconde diode 8b avec un second réseau d'extracteurs optiques. Le porteur de la montre peut voir une image figurative lumineuse symbolisant les explosions principales des fusées tirées dans la première étape du déroulement du feu d'artifice.On the figure 3b , we have schematized the display of the second figurative image of the animation, obtained by the collaboration of the light beams emitted by the second diode 8b with a second network of optical extractors. The wearer of the watch can see a luminous figurative image symbolizing the main explosions of the rockets fired in the first stage of the fireworks.

Sur la figure 3c, on a schématisé l'affichage de la troisième image figurative de l'animation, obtenue par la collaboration des faisceaux lumineux émis par la troisième diode 8c avec un troisième réseau d'extracteurs optiques. Le porteur de la montre peut voir une image figurative lumineuse symbolisant des explosions secondaires des fusées.On the figure 3c , we have schematized the display of the third figurative image of the animation, obtained by the collaboration of the light beams emitted by the third diode 8c with a third network of optical extractors. The wearer of the watch can see a bright figurative image symbolizing secondary explosions of rockets.

Ainsi, lorsque les trois diodes 8a, 8b et 8c sont alimentées de manière séquentielle, le porteur de la montre peut visualiser le tir d'un feu d'artifice suivi de deux séries d'explosion.Thus, when the three diodes 8a, 8b and 8c are powered sequentially, the wearer of the watch can view the fire of a fireworks followed by two sets of explosions.

L'homme du métier pourra bien entendu prévoir différentes variantes de l'animation qui vient d'être décrite sans sortir du cadre de la présente invention. On pourra par exemple prévoir que suite à l'affichage de la troisième image figurative de l'animation telle que décrite ci-dessus, les trois diodes 8a, 8b et 8c sont alimentées simultanément pour former l'image complète du feu d'artifice.Those skilled in the art will of course be able to provide different variants of the animation that has just been described without departing from the scope of the present invention. It will be possible, for example, to provide that, following the display of the third figurative image of the animation as described above, the three diodes 8a, 8b and 8c are simultaneously powered to form the complete image of the fireworks.

Par ailleurs, sur la base de la description qui précède, on peut prévoir un nombre important de variantes de réalisation de la pièce d'horlogerie à affichage d'un motif lumineux selon la présente invention.Furthermore, on the basis of the foregoing description, it is possible to provide a large number of variant embodiments of the timepiece displaying a luminous pattern according to the present invention.

A titre d'exemple, on peut agencer deux réseaux d'extracteurs optiques sur un même guide d'onde, pour lesquels les directions de réflexion des faisceaux lumineux sont différentes. Dans ce cas, on obtient la formation de deux images figuratives différentes, visibles depuis deux positions différentes. Suivant une variante de réalisation, on peut prévoir que les deux directions de réflexion présentent un angle entre-elles tel que les deux images formées constituent un stéréogramme lorsque l'observateur place ses yeux à une distance donnée au-dessus du guide optique.By way of example, two networks of optical extractors can be arranged on the same waveguide, for which the reflection directions of the light beams are different. In this case, we obtain the formation of two different figurative images, visible from two different positions. According to an alternative embodiment, it can be provided that the two directions of reflection have an angle between them such that the two images formed constitute a stereogram when the observer places his eyes at a given distance above the optical guide.

Un exemple de mode de réalisation particulier est représenté sur la figure 4, de manière schématique, sous la forme d'une coupe transversale partielle d'une pièce d'horlogerie incorporant un dispositif d'affichage d'un motif lumineux selon la présente invention. Dans ce mode de réalisation, il est prévu d'entraîner un guide optique suivant un mouvement de rotation autour de l'axe d'entraînement des aiguilles des heures et des minutes.An example of a particular embodiment is shown on the figure 4 , schematically, in the form of a partial cross section of a timepiece incorporating a display device of a light pattern according to the present invention. In this embodiment, it is intended to drive an optical guide in a rotational movement about the drive axis of the hour and minute hands.

Selon ce mode de réalisation particulier, la pièce d'horlogerie 40 comporte au moins une première et une seconde sources lumineuses 8 agencées pour émettre de la lumière à l'intérieur dudit guide optique suivant des directions d'émission différentes, des moyens supplémentaires 52, 54, 55 étant prévus pour entraîner le guide optique 51 en rotation de manière que la pluralité d'extracteurs optiques coopère alternativement avec la première et la seconde sources lumineuses 8.According to this particular embodiment, the timepiece 40 comprises at least a first and a second light source 8 arranged to emit light inside said optical guide according to different transmission directions, additional means 52, 54, 55 being provided for driving the optical guide 51 in rotation so that the plurality of optical extractors cooperates alternately with the first and the second light sources 8.

La pièce d'horlogerie 40 électromécanique comporte un fond-carrure 41, fermé par une lunette 42 et une glace 43. Un mouvement électronique de type conventionnel a été schématisé par un bloc 44 pour ne pas encombrer la figure.The timepiece 40 electromechanical comprises a bottom-middle 41, closed by a bezel 42 and a mirror 43. A conventional type of electronic movement has been schematized by a block 44 to not clutter the figure.

Le fond-carrure 41 peut être réalisé par moulage par injection de matière plastique, un tenon central 45 étant formé d'une pièce avec le fond-carrure, la fonction principale de ce dernier étant de porter la chaussée 46 et la roue des heures 47. La chaussée et la roue des heures sont liées de manière conventionnelle par le biais d'un mobile de minuterie 48, formé d'un pignon de minuterie 49 et d'une roue de minuterie 50.The bottom-middle 41 can be made by plastic injection molding, a central pin 45 being formed in one piece with the bottom-middle, the function main purpose of the latter being to carry the roadway 46 and the hour wheel 47. The roadway and the hour wheel are conventionally connected by means of a timer wheel 48, formed of a minute gear 49 and a timer wheel 50.

Ces rouages sont surmontés d'un cadran 2, lui-même surmonté d'un guide optique 51 similaire au guide optique 1 décrit en relation avec la description de la figure 1. Le cadran et le guide optique peuvent être centrés par le tenon central 45 et/ou maintenus dans leurs positions axiales respectives par des moyens conventionnels (non représentés), comme par exemple en reposant sur des épaulements adaptés de la carrure.These cogs are surmounted by a dial 2, itself surmounted by an optical guide 51 similar to the optical guide 1 described in connection with the description of the figure 1 . The dial and the optical guide may be centered by the central pin 45 and / or maintained in their respective axial positions by conventional means (not shown), for example by resting on shoulders adapted to the middle part.

Selon le présent mode de réalisation, il est prévu un mobile intermédiaire 52 supplémentaire, dont le pignon 53 engrène avec la roue de minuterie 50.According to the present embodiment, there is provided an additional intermediate mobile 52, whose pinion 53 meshes with the timer wheel 50.

D'autre part, le guide optique 51 présente un épaulement 54 annulaire et perpendiculaire à ses faces étendues, disposé sur la périphérie du guide optique et s'étendant en direction du mouvement de la pièce d'horlogerie. L'épaulement 54 porte une denture 55 agencée sur sa surface interne et destinée à engrener avec la roue 56 du mobile intermédiaire 52. Du fait de la chaîne cinématique mise en oeuvre entre la chaussé et le guide optique, ce dernier peut être entraîné en rotation dans le même sens de rotation que les aiguilles indicatrices (non représentées).On the other hand, the optical guide 51 has a shoulder 54 annular and perpendicular to its extended faces, disposed on the periphery of the optical guide and extending towards the movement of the timepiece. The shoulder 54 carries a toothing 55 arranged on its inner surface and intended to mesh with the wheel 56 of the intermediate mobile 52. Because of the kinematic chain implemented between the pavement and the optical guide, the latter can be rotated in the same direction of rotation as the indicator hands (not shown).

En outre, il est prévu de disposer au moins une diode 8 dans un emplacement adapté de la carrure situé en regard du guide optique 51, des moyens de connexion électrique étant prévus pour relier les bornes électriques de la diode aux bornes d'alimentation de la pile (symbolisée avec la référence 57 sur la figure 4) utilisée pour l'alimentation électrique de la pièce d'horlogerie. La diode 8 est avantageusement disposée dans une région de la carrure recouverte par la lunette pour éviter qu'elle soit visible au travers de la glace de la pièce d'horlogerie.In addition, it is intended to have at least one diode 8 in a suitable location of the middle facing the optical guide 51, electrical connection means being provided for connecting the electrical terminals of the diode to the power terminals of the stack (symbolized with reference 57 on the figure 4 ) used for the power supply of the timepiece. The diode 8 is advantageously arranged in a region of the middle part covered by the bezel to prevent it being visible through the ice of the timepiece.

De manière préférée, quatre diodes 8 sont agencées, respectivement, entre les positions 1 heure et 2 heures, entre les positions 4 heures et 5 heures, entre les positions 7 heures et 8 heures et, entre les positions 10 heures et 11 heures. Une ou plusieurs surfaces d'entrée 9 similaires à celles décrites en relation avec la description de la figure 1 peuvent être ménagées à des emplacements particuliers de la face latérale du guide optique 51. Dans le cas où quatre diodes sont agencées dans la pièce d'horlogerie, on prévoit entre une et quatre surfaces d'entrée 9.Preferably, four diodes 8 are arranged, respectively, between the 1 o'clock and 2 o'clock positions, between the 4 o'clock and 5 o'clock positions, between the 7 o'clock and 8 o'clock positions, and between the 10 o'clock and 11 o'clock positions. One or more input surfaces 9 similar to those described in connection with the description of the figure 1 may be provided at particular locations of the lateral face of the optical guide 51. In the case where four diodes are arranged in the timepiece, provision is made between one and four input surfaces 9.

En outre, on peut préférablement prévoir que les caractéristiques de la chaîne cinématique responsable de l'entraînement du guide optique sont telles que le guide optique 51 est entraîné à la même vitesse que l'aiguille des minutes.In addition, it is preferable to provide that the characteristics of the kinematic chain responsible for driving the optical guide are such that the optical guide 51 is driven at the same speed as the minute hand.

Sur la base de la structure décrite ci-dessus, on peut mettre en oeuvre différents modes de fonctionnement en ce qui concerne la formation de motifs décoratifs.On the basis of the structure described above, various modes of operation can be implemented with respect to the formation of decorative patterns.

Dans un mode de réalisation basique, on peut agencer un réseau d'extracteurs optiques 20 à l'intérieur d'une région correspondant à un quadrant de la surface totale du guide optique 51, ce quadrant étant par exemple disposé de telle manière que l'aiguille des minutes en constitue la bissectrice.In a basic embodiment, it is possible to arrange an optical extractor network 20 inside a region corresponding to one quadrant of the total surface of the optical guide 51, this quadrant being for example arranged in such a way that the minute hand constitutes the bisector.

Suivant une mise en oeuvre préférée, les quatre diodes 8 émettent des faisceaux lumineux dans des couleurs différentes.In a preferred embodiment, the four diodes 8 emit light beams in different colors.

Lorsque le quadrant portant le réseau d'extracteurs optiques, appelé quadrant décoratif, est centré en regard de l'une des diodes 8, cette dernière étant alimentée pour émettre de la lumière, on obtient la formation d'un motif décoratif d'intensité lumineuse maximale. Lorsque le quadrant décoratif est dans une position différente de sa position centrée, telle qu'elle vient d'être définie, l'intensité lumineuse du motif décoratif formé diminue à mesure que le quadrant s'éloigne de la position centrée.When the quadrant carrying the network of optical extractors, called decorative quadrant, is centered opposite one of the diodes 8, the latter being powered to emit light, the formation of a decorative pattern of luminous intensity is obtained. Max. When the decorative quadrant is in a position different from its centered position, as just defined, the luminous intensity of the formed decorative pattern decreases as the quadrant moves away from the centered position.

Ainsi, le porteur peut activer l'affichage du motif décoratif, par exemple par l'activation d'un organe de commande, le motif présentant une couleur et une intensité lumineuse dépendant de la position de l'aiguille des minutes par rapport au cadran de la pièce d'horlogerie.Thus, the wearer can activate the display of the decorative pattern, for example by the activation of a control member, the pattern having a color and a light intensity depending on the position of the minute hand with respect to the dial. the timepiece.

Bien entendu, il est possible de se passer des surfaces d'entrée 9 si on souhaite lisser les variations de l'intensité lumineuse, c'est-à-dire que, dans ce dernier cas, la transmission depuis une diode dans le guide optique s'effectue de la même façon si le quadrant est dans sa position centrée ou non.Of course, it is possible to dispense with the input surfaces 9 if it is desired to smooth the variations of the light intensity, that is to say that, in the latter case, the transmission from a diode in the optical guide is done in the same way if the quadrant is in its centered position or not.

A l'inverse, lorsque des surfaces d'entrée 9 sont ménagées dans la face latérale du guide d'onde 51, la transmission de la lumière est optimale depuis une diode vers l'intérieur du guide optique lorsque l'une des surfaces d'entrée est située en regard de l'une des diodes. Lorsque le guide optique est entraîné en rotation, la diode considérée se trouve progressivement en regard de la face latérale de forme annulaire du guide optique, cette dernière étant moins favorable à la transmission de la lumière vers l'intérieur du guide optique. La différence de qualité de transmission de la lumière vers l'intérieur du guide optique se traduit par une variation importante de l'intensité lumineuse du motif décoratif formé. L'intensité lumineuse diminue ensuite progressivement alors que les surfaces de réflexion 20 sont de moins en moins orientées face à la diode 8.Conversely, when input surfaces 9 are formed in the side face of waveguide 51, light transmission is optimal from a diode inwardly of the light guide when one of the surfaces of entrance is located next to one of the diodes. When the optical guide is rotated, the diode considered is gradually facing the annular side face of the optical guide, the latter being less favorable to the transmission of light towards the inside of the optical guide. The difference in quality of transmission of the light towards the inside of the optical guide results in a large variation in the luminous intensity of the decorative pattern formed. The light intensity then decreases gradually while the reflection surfaces 20 are less and less oriented towards the diode 8.

Tandis que le guide optique tourne, le quadrant décoratif se rapproche de la diode suivante. Ainsi, lorsque cette dernière est alimentée, le motif décoratif se forme avec une intensité lumineuse croissante au fur et à mesure que la bissectrice du quadrant se rapproche de la diode.As the optical guide rotates, the decorative quadrant approaches the next diode. Thus, when the latter is fed, the decorative pattern is formed with increasing light intensity as the bisector of the quadrant approaches the diode.

On constate que, selon ce mode de réalisation, le réseau d'extracteurs optiques 20 agencé sur chaque quadrant décoratif coopère alternativement avec chacune des diodes 8. Ainsi, le réseau d'extracteurs optiques 20 agencé sur chaque quadrant est illuminé séquentiellement par chaque diode 8.It can be seen that, according to this embodiment, the optical extractor network 20 arranged on each decorative quadrant cooperates alternately with each of the diodes 8. Thus, the optical extractor network 20 arranged on each quadrant is illuminated sequentially by each diode 8 .

L'exemple qui vient d'être décrit est présenté à titre illustratif non limitatif. On peut prévoir, en alternative, que le motif décoratif recouvre une surface plus importante qu'un quadrant du guide optique. On peut également prévoir que le guide optique 51 comporte une pluralité de réseaux d'extracteurs optiques sans sortir du cadre de la présente invention, comme par exemple un réseau par quadrant permettant de former simultanément quatre motifs décoratifs, la couleur de chaque motif étant différente de celles des autres motifs.The example which has just been described is presented as a non-limiting illustration. It can be provided, alternatively, that the decorative pattern covers a larger area than a quadrant of the optical guide. It can also be provided that the optical guide 51 comprises a plurality of optical extractor networks without departing from the scope of the present invention, such as, for example, a quadrant network making it possible to simultaneously form four decorative patterns, the color of each pattern being different from those of the other reasons.

D'autre part, on peut également prévoir un second guide optique (non représenté) superposé au guide optique 51 et asservi à la rotation de l'aiguille des heures. Dans ce but, on peut aménager un guide optique de ce type en le chassant directement sur le canon de la roue des heures avant de mettre l'aiguille des heures en place. De manière préférée, on peut disposer un jeu de diodes supplémentaires dans la carrure, en regard du guide optique supplémentaire.On the other hand, it is also possible to provide a second optical guide (not shown) superimposed on the optical guide 51 and slaved to the rotation of the hour hand. For this purpose, it is possible to arrange an optical guide of this type by driving it directly on the barrel of the hour wheel before putting the hour hand in place. In a preferred manner, an additional set of diodes can be arranged in the middle, facing the additional optical guide.

De manière alternative, on peut envisager de remplacer les aiguilles des heures et des minutes par des disques tournants, de manière connue. Dans ce cas, la mise en oeuvre de la présente invention consiste à réaliser les disques d'indication de l'heure et de la minute sous la forme de deux guides optiques. Un premier des deux guides optiques comporte alors un réseau d'extracteurs optiques qui, lorsqu'ils sont illuminés, forment un motif lumineux présentant la forme d'une aiguille des heures. Le second guide optique comporte un réseau d'extracteurs optiques qui, lorsqu'ils sont illuminés, forment un motif lumineux présentant la forme d'une aiguille des minutes. On peut alors prévoir un jeu de trois ou quatre diodes régulièrement réparties autour du cadran de la montre pour illuminer les guides optiques avec un maximum de directions incidentes différentes.Alternatively, it may be possible to replace the hour and minute hands with rotating disks, in a known manner. In this case, the implementation of the present invention consists in producing the hour and minute indication discs in the form of two optical guides. A first of the two optical guides then comprises a network of optical extractors which, when illuminated, form a light pattern having the shape of an hour hand. The second optical guide includes an array of optical extractors which, when illuminated, form a light pattern in the form of a minute hand. One can then provide a set of three or four diodes regularly distributed around the dial of the watch to illuminate the optical guides with a maximum of different incident directions.

L'homme du métier ne rencontrera pas de difficulté particulière pour prévoir le nombre de diodes nécessaires à la mise en oeuvre correcte du dispositif selon la présente invention en fonction de ses besoins et, notamment en fonction de la place libre dont il dispose sous la lunette pour disposer les diodes. On peut noter que du point de vue de la consommation et de l'encombrement, il est préférable de mettre en oeuvre un seul jeu de diodes, ceci étant possible lorsque la hauteur efficace d'émission du faisceau lumineux d'une diode est suffisante pour recouvrir sensiblement l'épaisseur des deux guides optiques réunis.The skilled person will not encounter any particular difficulty to provide the number of diodes necessary for the correct implementation of the device according to the present invention according to his needs and, in particular according to the free space available under the telescope to arrange the diodes. It may be noted that from the point of view of consumption and space requirement, it is preferable to implement a single set of diodes, this being possible when the effective transmission height the light beam of a diode is sufficient to substantially cover the thickness of the two optical guides together.

Selon une variante de réalisation représentée sur la figure 2bis, pour chaque source lumineuse on utilise une diode 8 qui est orientée orthogonalement à une face étendue 11 du guide optique 1, c'est-à-dire qu'elle émet des rayons lumineux dirigés globalement verticalement vers le haut, alors que dans le mode de réalisation représenté sur la figure 2, la diode 8 émet des rayons lumineux dirigés globalement orthogonalement à la face latérale 12.According to an alternative embodiment represented on the figure 2bis for each light source is used a diode 8 which is oriented orthogonally to an extended face 11 of the optical guide 1, that is to say that it emits light rays directed vertically vertically upward, while in the mode embodiment shown on the figure 2 , the diode 8 emits light rays directed globally orthogonally to the lateral face 12.

La diode 8 est ici agencée sous le guide optique 1, toujours au voisinage de la face latérale 12. La surface d'entrée 9 est ici parallèle aux faces étendues 10, 11. De préférence, la portion périphérique 60 de la face étendue supérieure 10 du guide optique 1 est incurvée vers la face étendue inférieure 11 de manière que les rayons lumineux, qui sont émis par la diode 8 en direction de la périphérie du guide optique 1, puissent se réfléchir totalement sur la portion périphérique 60 et se diriger vers les surfaces de réflexion 20 associées à la diode 8.The diode 8 is here arranged under the optical guide 1, always in the vicinity of the side face 12. The input surface 9 is here parallel to the extended faces 10, 11. Preferably, the peripheral portion 60 of the upper extended face 10 of the optical guide 1 is curved towards the lower extended face 11 so that the light rays, which are emitted by the diode 8 in the direction of the periphery of the optical guide 1, can be totally reflected on the peripheral portion 60 and move towards the reflection surfaces 20 associated with the diode 8.

Cette variante de réalisation permet d'utiliser des diodes 8 dites à émission vers le haut, ou "top emitting diode", relativement à la face de la plaque à circuits imprimés sur laquelle elles sont montées, par opposition aux diodes dites à émission latérale, ou "side emitting diode".This variant embodiment makes it possible to use diodes 8 called upward emission diodes, or "top emitting diodes", relative to the face of the printed circuit board on which they are mounted, as opposed to so-called side emission diodes, or "side emitting diode".

Du point de vue du fonctionnement de la pièce d'horlogerie décrite ci-dessus, on peut prévoir que les diodes ne sont pas alimentées en permanence pour des raisons d'économie d'énergie. Ainsi, l'affichage de motifs lumineux présentant respectivement la forme de l'aiguille des heures et de l'aiguille des minutes peut être commandé par les circuits électroniques de la montre en réponse à l'activation d'un organe de commande, par exemple. La pièce d'horlogerie présente alors une apparence originale et discrète tout en offrant une excellente lisibilité lorsque les diodes sont alimentées pour mettre en oeuvre l'affichage de l'heure.From the point of view of the operation of the timepiece described above, it can be provided that the diodes are not permanently powered for reasons of energy saving. Thus, the display of light patterns respectively having the shape of the hour hand and the minute hand can be controlled by the electronic circuits of the watch in response to the activation of a control member, for example . The timepiece then has an original and discreet appearance while providing excellent readability when the diodes are powered to implement the time display.

La description qui précède correspond à des modes de réalisation préférés de l'invention et ne saurait en aucun cas être considérée comme limitative, en ce qui concerne plus particulièrement la structure décrite pour la montre, la nature et le nombre des organes de commande utilisés ou encore l'emplacement des diodes. De même, l'invention n'est pas limitée aux modes de fonctionnements décrits et moyens retenus pour leurs activations respectives dans la mesure où ces paramètres sont modifiables par une programmation adéquate du circuit contrôleur. L'homme du métier ne rencontrera pas de difficulté particulière pour adapter le fonctionnement de la montre selon la présente invention à ses propres besoins. En particulier, comme suggéré plus haut, on peut réaliser chacun des extracteurs optiques sous la forme d'un bossage présentant au moins une surface d'extraction de la lumière au travers de laquelle la lumière est réfractée lorsqu'elle sort du guide optique.The foregoing description corresponds to preferred embodiments of the invention and can in no way be considered as limiting, with particular reference to the structure described for the watch, the nature and the number of control members used or still the location of the diodes. Likewise, the invention is not limited to the operating modes described and the means selected for their respective activations insofar as these parameters can be modified by appropriate programming of the controller circuit. The person skilled in the art will not encounter any particular difficulty in adapting the operation of the watch according to the present invention to his own needs. In particular, as suggested above, it is possible to realize each of the optical extractors in the form a boss having at least one light-extracting surface through which the light is refracted as it exits the optical guide.

On peut mettre en oeuvre de nombreuses variantes sans sortir du cadre de la présente invention, tel que prévoir de ne pas agencer de cadran dans la montre, le guide optique en assurant directement la fonction et, les rouages d'entraînement des aiguilles étant adaptés pour présenter une esthétique attractive pour le porteur de la montre. Dans le même ordre d'idée, on peut prévoir que le guide optique est directement formé par la glace de la montre. Dans ce cas, la glace comprend des extracteurs optiques ménagés dans sa face interne, une ou plusieurs sources lumineuses étant agencées dans la région de la lunette de manière à émettre des faisceaux lumineux en direction de la tranche de la glace.Many variants can be implemented without departing from the scope of the present invention, such as providing not to arrange a dial in the watch, the optical guide directly ensuring the function and, the drive wheels of the needles being adapted to to present an attractive aesthetic for the wearer of the watch. In the same vein, it can be provided that the optical guide is directly formed by the ice of the watch. In this case, the ice includes optical extractors formed in its inner face, one or more light sources being arranged in the region of the telescope so as to emit light beams in the direction of the edge of the ice.

On pourra également prévoir des caractéristiques supplémentaires sans sortir du cadre de la présente invention, comme par exemple recouvrir la face latérale du guide optique d'un revêtement réfléchissant, en dehors des surfaces d'entrée, pour limiter les pertes de lumière dues à des faisceaux lumineux parvenant éventuellement jusqu'à la face latérale et risquant de sortir du guide optique.It is also possible to provide additional features without departing from the scope of the present invention, such as for example covering the lateral face of the optical guide with a reflective coating, outside the input surfaces, in order to limit the losses of light due to beams. light possibly reaching the side face and likely to exit the optical guide.

Claims (17)

  1. Electronic device including a case (41) inside which there is housed an optical device for forming at least one figurative image in a first predefined direction in relation to the case, the optical device including, on the one hand, at least one optical guide (1, 51) having two large faces (10, 11) and at least one lateral face (12) and, on the other hand, at least one light source (8, 8a, 8b, 8c), which emits light inside the optical guide, of the type in which the light emitted by the light source cooperates with optical extractors, said electronic device further including at least two networks of optical extractors, a first network of optical extractors (19) corresponding to a first figurative image and a second network of optical extractors corresponding to a second figurative image, each of said extractors having predefined geometrical features including at least one reflective or refractive surface (20), which has a normal (n) oriented so as to face the corresponding light source (8, 8a, 8b, 8c), at a certain predefined angle, such that the set of light beams emitted by the light source that are reflected or refracted respectively by a network of optical extractors (19) forms a network of light beams which generates the corresponding figurative image in the direction of an observer, the light source being arranged in proximity to the lateral face of the optical guide and emitting light in a predefined direction such that it is reflected on the reflective surfaces (20), respectively such that it is refracted on the refractive surfaces of the corresponding network of optical extractors, said electronic device featuring an operating mode in which the two networks of optical extractors are illuminated sequentially and not simultaneously, characterized in that the two networks of optical extractors are arranged in one of said large faces of the optical guide.
  2. Electronic device according to the preceding claim, characterized in that the light source (8, 8a, 8b, 8c) is arranged facing the lateral face (12) in a predefined direction for emitting light inside the optical guide (1) and cooperating with the reflective or refractive surfaces (20) to form the corresponding figurative image.
  3. Electronic device according to claim 1, characterized in that the light source (8, 8a, 8b, 8c) is oriented in an orthogonal direction to one of the large faces (10, 11).
  4. Electronic device according to any one of the preceding claims, characterized in that it includes a first light source (8) emitting light in a predefined direction such that it is reflected onto the reflective surfaces (10), respectively such that it is refracted onto the refractive surfaces, of the first network of optical extractors (19), and a second light source (8) emitting light in a predefined direction such that it is reflected onto the reflective surfaces (20), respectively so that it is refracted onto the refractive surfaces, of the second network of optical extractors (19), and in that the light sources (8) are powered sequentially.
  5. Electronic device according to any one of claims 1 to 3, characterized in that it includes at least a first and a second light source (8, 8a, 8b, 8c) arranged to emit light inside the optical guide (51) along different emission directions, additional means (52, 54, 55) being provided to drive the optical guide (51) in rotation such that the optical extractors alternately cooperate with the first and second light source.
  6. Electronic device according to claim 4 or 5, characterized in that the respective colours of said first and second light sources belong to different ranges.
  7. Electronic device according to any one of claims 1 to 5, characterized in that each light source (8) is capable of emitting light in several colour ranges.
  8. Electronic device according to any one of the preceding claims, characterized in that the first network of optical extractors is arranged in a first optical guide and the second network of optical extractors is arranged in a second optical guide superposed onto the first optical guide.
  9. Electronic device according to any one of claims 1 to 7, characterized in that said first and second optical extractor networks are interlaced on said large face of the optical guide (1).
  10. Electronic device according to any one of the preceding claims, characterized in that the optical device includes at least two networks of optical extractors whose respective geometrical features are defined such that the associated figurative images are formed in different respective directions.
  11. Electronic device according to the preceding claim, characterized in that said different figurative image forming directions are defined so as to form a stereogram.
  12. Electronic device according to any of the preceding claims, characterized in that it forms a timepiece (40) in which the case (41) is closed by a crystal (43), the optical device being housed inside the case such that the figurative images are visible through the crystal.
  13. Electronic device according to the preceding claim, characterized in that it includes a dial (2) above which the optical guide (1, 51) is arranged.
  14. Electronic device according to the claim 12, characterized in that the optical guide (1, 51) also performs the function of a dial.
  15. Electronic device according to claim 12, characterized in that the optical guide (1, 51) also performs the function of a crystal.
  16. Electronic device according to any of claims 12 to 15, characterized in that the case has a bezel (42), each light source (8) being arranged at least partially underneath the bezel.
  17. Electronic device according to claim 12, characterized in that a watch movement and an analogue display are provided, the optical guide having an aperture (7) allowing the pipes of the display hands (3, 4) to pass, and in that the optical guide is fixedly mounted on one of said pipes.
EP05803063A 2004-12-02 2005-11-11 Electronic device comprising a light guide provided with at least two interleaved sequentially illuminated light extractor groups Active EP1820071B1 (en)

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Application Number Priority Date Filing Date Title
EP05803063A EP1820071B1 (en) 2004-12-02 2005-11-11 Electronic device comprising a light guide provided with at least two interleaved sequentially illuminated light extractor groups

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP04028559A EP1666992A1 (en) 2004-12-02 2004-12-02 Timepiece comprising a luminous decoration
PCT/EP2005/055928 WO2006058834A2 (en) 2004-12-02 2005-11-11 Electronic device comprising a light guide provided with at least two interleaved sequentially illuminated light extractor groups
EP05803063A EP1820071B1 (en) 2004-12-02 2005-11-11 Electronic device comprising a light guide provided with at least two interleaved sequentially illuminated light extractor groups

Publications (2)

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EP1820071A2 EP1820071A2 (en) 2007-08-22
EP1820071B1 true EP1820071B1 (en) 2008-05-07

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EP04028559A Withdrawn EP1666992A1 (en) 2004-12-02 2004-12-02 Timepiece comprising a luminous decoration
EP05803063A Active EP1820071B1 (en) 2004-12-02 2005-11-11 Electronic device comprising a light guide provided with at least two interleaved sequentially illuminated light extractor groups
EP05811148A Active EP1820070B1 (en) 2004-12-02 2005-11-11 Electronic device comprising a light guide provided with at least two interleaved light extractor groups
EP05816121A Active EP1820069B1 (en) 2004-12-02 2005-11-11 Timepiece comprising a light guide performing a glass function

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EP04028559A Withdrawn EP1666992A1 (en) 2004-12-02 2004-12-02 Timepiece comprising a luminous decoration

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EP05811148A Active EP1820070B1 (en) 2004-12-02 2005-11-11 Electronic device comprising a light guide provided with at least two interleaved light extractor groups
EP05816121A Active EP1820069B1 (en) 2004-12-02 2005-11-11 Timepiece comprising a light guide performing a glass function

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US (3) US7883256B2 (en)
EP (4) EP1666992A1 (en)
JP (3) JP2008522175A (en)
KR (3) KR101152535B1 (en)
CN (4) CN100487605C (en)
AT (3) ATE394715T1 (en)
DE (3) DE602005006613D1 (en)
ES (3) ES2307212T3 (en)
HK (4) HK1113832A1 (en)
IN (1) IN266781B (en)
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WO (3) WO2006058836A2 (en)

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US20090109651A1 (en) 2009-04-30
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DE602005006614D1 (en) 2008-06-19
TWI380140B (en) 2012-12-21
KR20070086403A (en) 2007-08-27
HK1113832A1 (en) 2008-10-17
CN101916065A (en) 2010-12-15
EP1666992A1 (en) 2006-06-07
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US7883256B2 (en) 2011-02-08
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