EP3588204B1 - Modul zur anzeige über bewegliche elemente um flexible verbindungen herum, anzeigesystem und dieses modul umfassende uhr - Google Patents

Modul zur anzeige über bewegliche elemente um flexible verbindungen herum, anzeigesystem und dieses modul umfassende uhr Download PDF

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Publication number
EP3588204B1
EP3588204B1 EP19176834.0A EP19176834A EP3588204B1 EP 3588204 B1 EP3588204 B1 EP 3588204B1 EP 19176834 A EP19176834 A EP 19176834A EP 3588204 B1 EP3588204 B1 EP 3588204B1
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Prior art keywords
display
module
thickness
display module
portions
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EP19176834.0A
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English (en)
French (fr)
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EP3588204A1 (de
Inventor
Francis Cardot
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CSEM Centre Suisse dElectronique et de Microtechnique SA Recherche et Développement
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CSEM Centre Suisse dElectronique et de Microtechnique SA Recherche et Développement
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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
    • 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
    • G04B45/0023—Inscriptions or pictures moved by the clockwork, e.g. for advertising
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/302—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements characterised by the form or geometrical disposition of the individual elements

Definitions

  • the invention relates to the general field of microtechnology and in particular the manufacturing of parts by etching silicon.
  • the invention relates more particularly to a mechanical display module comprising a plurality of elements which are mobile relative to each other around at least one deformable connection of the flexible blade type to form three-dimensional display patterns.
  • the invention relates in particular to the method of manufacturing such a display module.
  • the invention will find a particular application in the watchmaking industry, notably for the production of animated watch or clock dials.
  • Analogue display systems particularly those with needles, have been known and used for decades in a multitude of applications in order to provide a direct indication, for example on a graduated scale, a dial or other system for representing a measurement value of a physical quantity such as speed, temperature, pressure, intensity, voltage or electrical resistance, of any information, or even and probably most widely for measuring time.
  • a disadvantage of this type of display module lies in the fineness of its constituent elements, of the order of a few micrometers, which provides a popular “lace” type aesthetic effect but which can impair the readability of the patterns within the module, in particular if said patterns are also accompanied by aesthetic elements or if the color contrast between the display module and an underlying background or dial is low.
  • An object of the invention is specifically to solve this problem of readability and visibility of the patterns in a display module as described in EP 3291024 A1 .
  • the present invention achieves its aim by providing a display module comprising at least two display members movable by means of a deformable connection of the flexible blade type relative to a fixed frame between a rest position and a display position, each display member comprising a display portion of a pattern complementary to the display portion of the other display member to form said pattern in said display position.
  • the display portion of each display member has a thickness e2, measured perpendicular to a plane P of formation of the display members and their deformable connections, greater than the thickness of the display members and their deformable connections at least.
  • the thickness e of the display portions is greater by 50% to 150% of the thickness of the display members and their deformable connections, preferably by 100% to 150%.
  • the thickness of the display portions of the display members is advantageously between 260 and 400 ⁇ m.
  • the said display member(s) movable relative to the frame cooperate with an actuating pusher arranged to transmit a force for moving this display member by elastic deformation around its deformable connection(s) from the said rest position to the said display position.
  • Each of the display modules can be produced by molding and/or machining metal alloys, glasses, ceramics (Al 2 O 3 ), machinable and/or photohardenable hard polymers (epoxy, PEEK).
  • the display modules are made of monocrystalline or polycrystalline silicon and obtained by deep silicon etching processes.
  • the display module of the invention is obtained by deep etching of a silicon wafer, said display members being formed individually on different engraving levels, each defining a said formation plane of the display organs and their deformable connections.
  • said distinct etching levels can be connected to each other by connecting beams or heels making it possible to maintain a constant gap between said levels.
  • a display module according to the invention comprising up to 32 different levels, thus providing a three-dimensional lacework with pattern display portions of thickness much greater than the flexible connections and other arms of the display members secured to the module frame, in order to improve the visibility and readability of the displayed patterns, for example numbers or letters.
  • the flexible connections are for example made up of flexible blades with a width of between 2 and 50 microns, the thickness e1 of the frame and the display member(s) being greater than 30 microns. This dimensioning thus effectively provides an elastic character to the flexible blades forming the flexible connections while the thicker portions of the frame and the display members are completely rigid and devoid of elastic character.
  • said actuator is also integral with the frame and movable relative to it by means of a plurality of flexible and preferably flexible connections.
  • said actuator extends in a radial direction relative to a geometric center of the display module.
  • each said display module forms a monolithic part comprising said display members, the frame, the actuator and one or more deformable links connecting said display members and said actuator to the frame.
  • the display system comprises a plurality of display modules arranged concentrically around a geometric center.
  • the actuating device is rotatable about an axis of rotation passing through said geometric center.
  • the display system comprises a first and a second display module as previously defined, said modules being arranged concentrically around a common geometric center and superimposed on each other such that the display portions of the first and second modules are exactly superimposed on each other in their respective display positions.
  • the actuating device is arranged to exert in at least one angular position around the axis of rotation a force capable of mobilizing the actuator of each display module so as to move said movable display members from the rest position to the display position to simultaneously form said pattern on each display module.
  • the actuating device comprises a first and a second actuating mobile arranged to be mobile in rotation around the axis of rotation so as to cooperate and mobilize in at least one angular position around the axis of rotation the actuator of each display module.
  • the actuating device where appropriate formed of a first and a second actuating mobile, comprises a cam or a lug.
  • the first and second actuating mobiles are rotationally indexed relative to each other about the rotation axis such that the patterns simultaneously formed on each display module are superimposed on each other.
  • the actuating device comprises a single actuating mobile arranged to cooperate simultaneously in rotation with the actuator of each display module.
  • the present invention also relates to a timepiece comprising a display system as previously described.
  • the actuating device is kinematically linked to the hour wheel or the cannon pinion of at least one watch movement.
  • the pattern of each said display module is configured to display a date of time.
  • the present invention relates to an analog display module and system comprising display members animated by means of a mechanical actuation device.
  • a preferred application of the invention relates to the field of watchmaking, it is not limited to a display of time information in a timepiece and can also be implemented in any field requiring the use of a system for displaying any information or representation in an animated form.
  • such a display module 1 consists of a display module for a pattern M such as a digit or a number comprising a fixed frame 2 to which at least two display members are secured, in this case three display members 31, 32, 33 to form the number “6” ( Figure 1B ).
  • the display members 31, 32, 33 are integral with the frame 2 and each comprise a display portion 31a, 32a, 33a of the pattern M, said display portions being complementary to one another so that they form said pattern in at least one relative position of said display members 31, 32, 33.
  • the display members 31, 32, 33 are integral with the frame 2 and the members 32, 33 are also movable relative to the frame 2 by means of at least one flexible connection 4 formed by at least one flexible blade 41 between a first rest position, shown in the Figure 1A , in which the display portions of the organs display 31, 32, 33 are spaced apart from each other and a display position, shown in the Figure 1B , wherein said display portions 31a, 32a, 33a are counter-imposed on each other to form and display the pattern M, in this case a number “6”.
  • the movement of the display members 32, 33 relative to the frame 2 around their flexible connection 4 between the rest and display positions advantageously results according to the invention from the cooperation of said display members 32, 33 with an actuating pusher 5 arranged relative to the frame 2 and to the display members to transmit a force capable of inducing a movement of said display members by elastic deformation around flexible connections also 4 following the action of an actuating device 6 distinct from the display module 1, such as a cam 61 movable in rotation around an axis A on the Figures 1A and 1B , on the actuating push button 5.
  • an actuating device 6 distinct from the display module 1, such as a cam 61 movable in rotation around an axis A on the Figures 1A and 1B , on the actuating push button 5.
  • the display module 1 of the invention is advantageously made up of a monolithic part formed from a rigid material, which is understood in the context of the present invention to be any material whose Young's modulus is greater than 2.3 GPa.
  • the material used to produce the display module 1 of the invention is silicon, monocrystalline or polycrystalline, from which it is easy, for example by deep etching processes (notably DRIE - for Deep Reactive-ion Etching in English), to form the frame 2 and the display members 31, 32, 33 connected to each other by at least one flexible connection 4, resulting in particular advantageously from the formation during the deep etching process of one or more flexible blades 4 with a width of between 2 and 50 microns, the thickness of the frame 2 and of the display member(s) being preferably greater than 30 microns.
  • the movable display members 32, 33 and their display portions 32a, 33a are directly connected to the actuating push button 5.
  • the display member 31 remains identical to that of the Figures 1A and 1B .
  • This embodiment has the particularity of having no interruption in the movement control chain, from the actuating pusher 5 to the display portions 32a, 33a. There is no friction within the display module 1 due to the movements, only deformations, therefore a minimal loss of energy.
  • the display portions 32a, 33b are connected to the upper ends of two rockers 32b and 33b, rotating around flexible links 4 in the form of flexible “butterfly” pivots 42 secured to the frame 2.
  • the lower end of each of the rockers is directly connected through a set 7 of flexible serpentine blades to a plate 51 of the actuating pusher 5, which is also secured to the frame 2 by a structure 8 for guiding in linear translation with flexible blades 81.
  • the structural and functional principles of the display module 1 of the Figures 1A and 1B can be extended for the production of an animated circular dial I comprising a plurality of display modules 1 as shown in Figure 2 .
  • Such a dial can be implemented in a timepiece such as a watch or a clock for displaying the time in an animated form with an actuating device 6 of the pushers 5 arranged to move in rotation in the center of the dial and the display modules 1 is kinematically connected to the hour wheel of a watch movement of the timepiece.
  • the actuating device 6 is represented by a ring carrying on its periphery a protuberance forming a cam 61.
  • the cam 61 pushes the free end of the actuating pusher 5 ( Figure 1B ) which acts as a follower contact, and causes a translational movement of the actuating pusher 5 which then pushes on the intermediate rockers 32b, 33b which pivot relative to the frame 2 and thus cause the movement of the display portions 32a, 33a towards the display position in which said display portions fit with the portion 31a to form the pattern “6” on the Figure 1B .
  • An animated display system comprising mobile display portions following a determined period to generate a visual animation effect within the display.
  • the present invention proposes a slight modification of the display portions 31a, 32a, 33a of the display members 3 to significantly increase their own height relative to that of the other elements of the module (frame 2, flexible connections 4, pusher 5, display members 3), and to duplicate the display portions 31a, 32a, 3a3 on several superimposed levels to create a three-dimensional effect of the display at the level of the patterns M at least.
  • FIG. 2 illustrates this improvement in its simplest embodiment, for a given display portion 32.
  • the display module 1 it is appropriate to produce the display module 1 from a silicon wafer with a thickness E of approximately 400 ⁇ m, which is then etched by deep etching processes, in particular of the DRIE type (from the acronym Dry Reactive Ion Etching in English) selectively to obtain the precise functional parts of the module, namely the frame 2, the flexible connections 4 and other actuating pusher 5 with a first thickness e1 of the order of 170 ⁇ m, while the display portions 32a are etched over the entire thickness E of the wafer, or at least over a thickness e2 greater than 50 to 150% of the thickness e1, so as to enhance the display patterns M during the assembly or juxtaposition of the display members in the display position.
  • DRIE dry Reactive Ion Etching in English
  • the display portion 32a can further undergo additional etching in order to produce a 3-level stage, thus providing three-dimensional aesthetic effects within the display portions.
  • FIG. 3 A first variant embodiment of a module according to the present invention is presented in Figure 3 , in which two display portions 32a, 32a' are assembled head to tail, which has the advantage of being able to reduce the size of the display portions 32a making up the pattern without affecting the resolution in the display position, but increasing the animation of the display with a greater number of moving parts adjusting to form the pattern in the display position M, the display portions having a total thickness of 400 ⁇ m.
  • the display modules of the invention make it possible to produce thin monolithic dials with a spectacular animated display, as well as associated display systems.
  • the improved modules according to the invention make it possible to increase this spectacular and animated side of the display by associating in the same display system two dials or display modules according to the invention in a superimposed manner such that each dial simultaneously forms their identical display patterns M in a superimposed manner, thus providing significant depth and three-dimensionality to the display of the pattern.
  • the Handle (H) part of the wafer can undergo a second etching step, which leads to a topology on 8 levels for an animated dial, therefore a total topology on 64 levels for the set of two superimposed dials C1 + C2.
  • This “three-dimensional lace” creation can be used to create light reflection effects on the sides of the display patterns M, in particular for example the hourly date numerals in a timepiece dial.
  • each of the dials are preferably carried out in opposite directions so as to amplify the “spectacular” aspect of the display. More specifically, each dial C1, C2 can be engraved such that the display portions 32a of the display patterns move opposite each other from their rest position to the display position.
  • dials C1 and C2 are arranged in such a way that their “Device” part D, comprising frame 2, pusher 5, and flexible links 4 among others are closest to each other, which makes it possible to envisage the assembly of the dials together via a ring whose thickness can fix the distance between the two dials, the ring then being able to serve as a mounting and indexing member with respect to an actuating device of the display system of the invention, for example a cam secured to the axis of the hour wheel or the cannon pinion of a watch movement.
  • an actuating device of the display system of the invention for example a cam secured to the axis of the hour wheel or the cannon pinion of a watch movement.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Electromechanical Clocks (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)

Claims (7)

  1. Herstellungsverfahren eines Anzeigemoduls (1) aus einem Siliziumwafer, wobei das Anzeigemodul (1) mindestens zwei Anzeigeelemente (32, 33) umfasst, welche über eine verformbare Verbindung (4) in Bezug auf einen festen Rahmen (2) zwischen einer Ruheposition und einer Anzeigeposition bewegbar sind, wobei jedes Anzeigeelement einen Anzeigeabschnitt (32a, 33a) eines Musters (M) aufweist, welches zum Anzeigeabschnitt des anderen Anzeigeelements komplementär ist, um das Muster (M) in der besagten Anzeigeposition zu bilden, mit dem Schritt einer Tiefätzung auf einer ersten Dicke e1 des Siliziumwafers, um den festen Rahmen (2), die verformbare Verbindung (4) und einen Betätigungsdrücker (5) zu erhalten, wobei die Anzeigeabschnitte (32a, 33a) auf einer zweiten Dicke e2 des Siliziumwafers, grösser als die erste Dicke e1, geätzt sind.
  2. Herstellungsverfahren gemäss Anspruch 1, wobei der Siliziumwafer eine Dicke von 400 µm aufweist.
  3. Herstellungsverfahren gemäss einem der Ansprüche 1 oder 2, wobei die erste Dicke e1 170 µm betragt.
  4. Herstellungsverfahren gemäss einem der Ansprüche 1 bis 3, wobei die zweite Dicke e2 um 50 bis 150% grösser als die erste Dicke e1 ist.
  5. Herstellungsverfahren gemäss einem der Ansprüche 1 bis 4, wobei die Etage drei Ebenen umfasst.
  6. Herstellungsverfahren gemäss einem der Ansprüche 1 bis 5, umfassend eine Kopf-an-Kopf-Montage der Anzeigeabschnitte (32a, 33a).
  7. Herstellungsverfahren gemäss Anspruch 6, wobei die Anzeigeabschnitte alle eine Dicke von 400 µm aufweisen.
EP19176834.0A 2018-06-22 2019-05-27 Modul zur anzeige über bewegliche elemente um flexible verbindungen herum, anzeigesystem und dieses modul umfassende uhr Active EP3588204B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH00797/18A CH715140A1 (fr) 2018-06-22 2018-06-22 Module d'affichage comportant des éléments d'affichage mobiles par l'intermédiaire de liaisons flexibles, système d'affichage et pièce d'horlogerie.

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EP3588204A1 EP3588204A1 (de) 2020-01-01
EP3588204B1 true EP3588204B1 (de) 2025-03-12

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4392834A1 (de) * 2021-08-27 2024-07-03 Patek Philippe Sa Geneve Uhr, die ein zifferblatt mit mindestens einem fenster und eine schliessvorrichtung dieses fensters umfasst

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Publication number Priority date Publication date Assignee Title
CH691833A5 (fr) 1997-09-25 2001-10-31 Vacheron & Constantin S A Module d'affichage pour pièce d'horlogerie, notamment montre-bracelet, comportant un affichage sautant des heures et un affichage rétrograde des minutes.
CH712875B1 (fr) * 2016-09-05 2022-10-31 Csem Centre Suisse Delectronique Et De Microtechique Sa Rech Et Developpement Module d'affichage comportant des éléments mobiles autour de liaisons déformables, système d'affichage associé et pièce d'horlogerie comportant un tel système d'affichage.

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EP3588204A1 (de) 2020-01-01
CH715140A1 (fr) 2019-12-30

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