EP3428739B1 - Display assembly - Google Patents

Display assembly Download PDF

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Publication number
EP3428739B1
EP3428739B1 EP17181521.0A EP17181521A EP3428739B1 EP 3428739 B1 EP3428739 B1 EP 3428739B1 EP 17181521 A EP17181521 A EP 17181521A EP 3428739 B1 EP3428739 B1 EP 3428739B1
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EP
European Patent Office
Prior art keywords
assembly according
substrate
display
face
light
Prior art date
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EP17181521.0A
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German (de)
French (fr)
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EP3428739A1 (en
Inventor
Nicolas Blanckaert
Jérôme THIAULT
Cyrille GERNEZ
Pierry Vuille
Ariane GACHET-MUELLER
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Swatch Group Research and Development SA
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Swatch Group Research and Development SA
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Publication date
Application filed by Swatch Group Research and Development SA filed Critical Swatch Group Research and Development SA
Priority to EP17181521.0A priority Critical patent/EP3428739B1/en
Priority to JP2018130456A priority patent/JP2019020404A/en
Priority to CN202211476363.3A priority patent/CN115793428A/en
Priority to CN201810764665.8A priority patent/CN109254520A/en
Priority to US16/034,904 priority patent/US11249444B2/en
Publication of EP3428739A1 publication Critical patent/EP3428739A1/en
Application granted granted Critical
Publication of EP3428739B1 publication Critical patent/EP3428739B1/en
Priority to JP2021021891A priority patent/JP7289858B2/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
    • G04B19/32—Illumination of dials or hands by luminescent substances
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G9/00—Visual time or date indication means
    • G04G9/0017—Visual time or date indication means in which the light emitting display elements may be activated at will or are controlled in accordance with the ambient light
    • 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
    • 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
    • G04B47/00—Time-pieces combined with other articles which do not interfere with the running or the time-keeping of the time-piece
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G9/00—Visual time or date indication means
    • G04G9/08—Visual time or date indication means by building-up characters using a combination of indicating elements, e.g. by using multiplexing techniques
    • G04G9/10—Visual time or date indication means by building-up characters using a combination of indicating elements, e.g. by using multiplexing techniques by controlling light sources, e.g. electroluminescent diodes

Definitions

  • the present invention relates to a display assembly and more particularly an OLED display assembly intended to illuminate a passive display device, for example in a timepiece such as a watch.
  • more and more devices combine a traditional mechanical display with hands and a digital display, for example for applications connected to a smartphone, or to any other object provided with means of communication, such as in the patent application US2015 / 378319 A1 .
  • the digital display when it is a backlit display, is only lit on demand, so as to reduce the power consumption of the system, while the mechanical display is purely passive. , and therefore not legible in the dark without a Superluminova® type coating.
  • These phosphorescent coatings are not efficient enough for certain applications (date disc for example) because of the small coated surface, but also of the extra thickness generated.
  • the light is emitted towards the front and does not make it possible to illuminate other objects in the same plane or slightly receding relative to the front face of the display.
  • LED light-emitting diode
  • DELo organic active layers
  • OLED organic active layers
  • This low efficiency is mainly due to total reflections of the light emitted by the active layer.
  • LEDs unlike lasers where coherent light is strongly oriented by the resonant cavity, light is emitted isotropically in LEDs. This isotropy has the effect that the light emitted at an angle to the normal to the extraction surface greater than the limit angle undergoes total reflection, which traps this light in its substrate. This trapped light can represent up to 80% of the light emitted for a substrate that has not been optimized.
  • the present invention relates to a display assembly, comprising an organic light emitting diode (LED) display device, comprising at least one LED composed of an emissive stack deposited on a transparent (or semi-transparent or translucent) substrate, the rear face is arranged on the main emitting surface of the LED and a secondary object to be illuminated, said transparent substrate comprising a front face and at least one lateral face, said lateral face being arranged so as to illuminate a secondary object.
  • LED organic light emitting diode
  • the display assembly is particularly suitable for being integrated into a watch, in which the main surface, which may include an integrated or added decoration and which can be produced by various known techniques (pad printing, screen printing, digital printing, decal, etc. ..) forms the face of a watch face that can display information in transmission to the user, a secondary object placed near the side face that can be illuminated by light trapped between the front faces of the substrate when it comes out by the lateral face of the substrate. Typically this recovered light can be advantageously used to illuminate a passive analog display arranged near this side face.
  • the DELo display device forms a watch face, one can provide in the thickness of the latter a through opening forming a window and advantageously combined the DELo display device with a passive analog display device of the display type.
  • the display device can also illuminate a secondary object placed close to the lateral face and substantially in the same plane as the substrate.
  • said side face is frosted so as to produce a diffuse light in use.
  • said side face has an angle between 90 and 135 ° relative to the front face.
  • the transparent substrate has a higher refractive index than the refractive index of the LED layer so as to confine the light in this substrate.
  • Opaque covers are advantageously placed on the lateral faces which do not illuminate the secondary object.
  • the present invention aims to provide a display assembly comprising an organic light-emitting diode (LED) display device A, used to display information on demand on demand, and a secondary object 6 to be illuminated making it possible to use at best the light emitted by one or more organic LEDs of the DELo A display device, trapped between the faces of the substrate of the device and recovered to illuminate the secondary object 6 associated with this DELo device.
  • LED organic light-emitting diode
  • a watch M integrating a mixed display device comprising an active lighting screen A (backlit, LED or LED), which can be decorated on its face oriented towards the user, and a passive display comprising a time dial cooperating with hands 11 and a passive display member 6 visible through a window 7 provided in the dial.
  • active lighting screen A backlit, LED or LED
  • passive display comprising a time dial cooperating with hands 11 and a passive display member 6 visible through a window 7 provided in the dial.
  • the display assembly of the invention uses the light trapped in a transparent layer 2 of the active display by total reflection by extracting this light by a side face 8 substantially perpendicular to the main faces or having an angle ⁇ between 90 ° and 135 ° relative to the front face.
  • the active display device of the invention comprises an emitting layer of the organic light-emitting diode 1 LED 1 type disposed on the rear face of the transparent substrate 2. It can be an active matrix DELo type screen, or of a liquid crystal screen (LCD) in particular of the TFT type associated with a backlight device comprising an LED or an LED in the latter case the light is recovered from the lateral faces of the light guide of the backlight device This screen , in this description is considered the main display.
  • part of the light trapped 5 between the parallel faces of the transparent substrate 2 due to the total reflection is extracted by at least one side face 8 produced in the selected area.
  • This light can then be used to illuminate other so-called secondary elements 6, such as an analog time display or a display member visible through the window 7, for example a date disc 6.
  • the refractive index of the substrate it is possible to modify the ratio between the light emitted by the front end face and the light emitted by the edge or side face of the substrate by modifying the refractive index of the substrate: the higher the substrate has a high refractive index, the more light will be trapped in the transparent layer 2. It may, from this point of view be advantageous to use a substrate 2 of high index, such as sapphire whose refractive index is 1.768.
  • One or more additional layers 3 can be added to the surface of the transparent substrate 2. These layers can for example serve as an anti-scratch, anti-reflective, aesthetic layer.
  • the lateral faces 8 of the substrate 2 preferably have a texture reducing internal reflection, in order to optimize the light extraction.
  • water jet, grinding or ultrasonic cutting techniques have the advantageous effect of frosting the flank 8 of the substrate 2, thereby improving the diffusion and therefore the uniformity of the light output.
  • an object slightly behind the main display as would be a classic date display by a mechanically driven date disc (see figures 2 and 3 ) is preferably lit by side faces oriented towards this secondary display, which has the additional advantage of reducing the direct view towards the user, and therefore of reducing the glare.
  • the lateral faces not illuminating any secondary object can advantageously be covered with an opaque layer 9, preferably reflecting.
  • the organic light-emitting diode (LED) display device of the invention is advantageously integrated into mixed watches, comprising a traditional time display comprising hands 11 and a window 7 under which is driven a date disc 6
  • the hands are backlit by the main display device DELo which forms a dial behind them, while the window 7 is lit by the side faces 8 of the window 7 formed in the substrate 2 of the diode display device.
  • organic electroluminescent (LED) of the invention is advantageously integrated into mixed watches, comprising a traditional time display comprising hands 11 and a window 7 under which is driven a date disc 6
  • the hands are backlit by the main display device DELo which forms a dial behind them, while the window 7 is lit by the side faces 8 of the window 7 formed in the substrate 2 of the diode display device.
  • organic electroluminescent (LED) of the invention is advantageously integrated into mixed watches, comprising a traditional time display comprising hands 11 and a window 7 under which is driven a date disc 6
  • the hands are backlit by the

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Electroluminescent Light Sources (AREA)
  • Electric Clocks (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Description

Domaine techniqueTechnical area

La présente invention se rapporte à un ensemble d'affichage et plus particulièrement un ensemble d'affichage OLED destiné à éclairer un dispositif d'affichage passif par exemple dans une pièce d'horlogerie telle qu'une montre.The present invention relates to a display assembly and more particularly an OLED display assembly intended to illuminate a passive display device, for example in a timepiece such as a watch.

Arrière-plan technologiqueTechnological background

Dans le secteur de l'horlogerie, de plus en plus de dispositifs combinent un affichage mécanique à aiguilles traditionnel et un affichage numérique, par exemple pour des applications connectées à un smartphone, ou à tout autre objet muni de moyens de communication, tel que dans la demande de brevet US2015/378319 A1 .In the watchmaking sector, more and more devices combine a traditional mechanical display with hands and a digital display, for example for applications connected to a smartphone, or to any other object provided with means of communication, such as in the patent application US2015 / 378319 A1 .

Dans de tels dispositifs, l'affichage numérique, lorsqu'il s'agit d'affichage rétroéclairé, n'est allumé qu'à la demande, de façon à réduire la consommation électrique du système, tandis que l'affichage mécanique est purement passif, et donc, non lisible dans l'obscurité sans un revêtement du type Superluminova®. Ces revêtements phosphorescents ne sont pas assez performants pour certaines applications (disque quantième par exemple) en raison de la faible surface revêtue, mais aussi de la surépaisseur engendrée.In such devices, the digital display, when it is a backlit display, is only lit on demand, so as to reduce the power consumption of the system, while the mechanical display is purely passive. , and therefore not legible in the dark without a Superluminova® type coating. These phosphorescent coatings are not efficient enough for certain applications (date disc for example) because of the small coated surface, but also of the extra thickness generated.

Dans un affichage numérique de l'art antérieur néanmoins, la lumière est émise vers l'avant et ne permet pas d'éclairer d'autres objets dans le même plan ou légèrement en recul par rapport à la face avant de l'affichage.In a digital display of the prior art, however, the light is emitted towards the front and does not make it possible to illuminate other objects in the same plane or slightly receding relative to the front face of the display.

Par ailleurs, il est connu que le rendement des dispositifs à diodes électroluminescentes (DEL), y compris ceux à base de couches actives organiques (DELo en Français ou OLED en Anglais) généralement utilisés pour l'éclairage de ces affichages, est fortement limité par le rendement optique, dû à la difficulté d'extraction de la lumière depuis un milieu fortement réfringent vers un milieu faiblement réfringent. Ce faible rendement est principalement dû à des réflexions totales de la lumière émise par la couche active. En effet, contrairement aux lasers où la lumière cohérente est fortement orientée par la cavité résonnante, la lumière est émise de façon isotrope dans les DEL. Cette isotropie a pour effet que la lumière émise avec un angle par rapport à la normale à la surface d'extraction supérieur à l'angle limite subit une réflexion totale, ce qui piège cette lumière dans son substrat. Cette lumière piégée peut représenter jusqu'à 80% de la lumière émise pour un substrat qui n'a pas été optimisé.Furthermore, it is known that the performance of light-emitting diode (LED) devices, including those based on organic active layers (DELo in French or OLED in English) generally used for the lighting of these displays, is greatly limited by the yield optical, due to the difficulty of extracting light from a highly refractive medium towards a weakly refractive medium. This low efficiency is mainly due to total reflections of the light emitted by the active layer. In fact, unlike lasers where coherent light is strongly oriented by the resonant cavity, light is emitted isotropically in LEDs. This isotropy has the effect that the light emitted at an angle to the normal to the extraction surface greater than the limit angle undergoes total reflection, which traps this light in its substrate. This trapped light can represent up to 80% of the light emitted for a substrate that has not been optimized.

Afin d'augmenter le rendement optique des affichages numériques, diverses stratégies de texturation de la surface d'extraction ont été proposées dans l'art antérieur : dépolissage de la surface, structures régulières de films dit « optiques » optimisés pour l'extraction de la lumière, « dômes » hémicylindriques au-dessus des zones actives (pixels).In order to increase the optical efficiency of digital displays, various strategies for texturing the extraction surface have been proposed in the prior art: frosting of the surface, regular structures of so-called "optical" films optimized for the extraction of the light, semi-cylindrical "domes" above the active areas (pixels).

Néanmoins, à ce jour, quel que soit le dispositif d'extraction, une proportion non négligeable de la lumière émise au niveau de la jonction de la DEL reste piégée et est perdue dans le guide d'onde formé par le substrat et le cas échéant dans les différentes couches qui composent l'OLED.However, to date, regardless of the extraction device, a significant proportion of the light emitted at the junction of the LED remains trapped and is lost in the waveguide formed by the substrate and, where appropriate in the different layers that make up the OLED.

Résumé de l'inventionSummary of the invention

La présente invention concerne un ensemble d'affichage, comprenant un dispositif d'affichage à diode électroluminescentes organiques (DELo), comprenant au moins une DELo composée d'un empilement émissif déposé sur un substrat transparent (ou semi-transparent ou translucide) dont la face arrière est disposée sur la surface principale d'émission de la DELo et un objet secondaire à éclairer, ledit substrat transparent comprenant une face avant et au moins une face latérale, ladite face latérale étant agencée de façon à éclairer un objet secondaire.The present invention relates to a display assembly, comprising an organic light emitting diode (LED) display device, comprising at least one LED composed of an emissive stack deposited on a transparent (or semi-transparent or translucent) substrate, the rear face is arranged on the main emitting surface of the LED and a secondary object to be illuminated, said transparent substrate comprising a front face and at least one lateral face, said lateral face being arranged so as to illuminate a secondary object.

L'ensemble d'affichage est particulièrement adapté à être intégré dans une montre, dans laquelle la surface principale, qui peut comprendre un décor intégré ou rapporté et qui peut être réaliséepar diverses techniques connues (tampographie, sérigraphie, digital printing, décalque, etc...) forme la face d'un cadran de montre pouvant afficher une information en transmission vers l'utilisateur, un objet secondaire disposé à proximité de la face latérale pouvant être éclairé par la lumière piégée entre les faces frontales du substrat lorsqu'elle sort par la face latérale du substrat. Typiquement cette lumière récupérée peut être avantageusement mise à profit pour éclairer un affichage analogique passif disposé à proximité de cette face latérale. Lorsque le dispositif d'affichage DELo forme un cadran de montre, on peut prévoir dans l'épaisseur de ce dernier une ouverture traversante formant un guichet et avantageusement combiné le dispositif d'affichage DELo avec un dispositif d'affichage analogique passif du type affichage de quantième dans lequel le disque de quantième se déplace sous le guichet et dans lequel l'information portée par le disque de quantième visible à travers le guichet peut être éclairée par la lumière extraite des parois latérales du guichet. Le dispositif d'affichage peut également éclairer un objet secondaire disposé à proximité de la face latérale et sensiblement dans le même plan que le substrat.The display assembly is particularly suitable for being integrated into a watch, in which the main surface, which may include an integrated or added decoration and which can be produced by various known techniques (pad printing, screen printing, digital printing, decal, etc. ..) forms the face of a watch face that can display information in transmission to the user, a secondary object placed near the side face that can be illuminated by light trapped between the front faces of the substrate when it comes out by the lateral face of the substrate. Typically this recovered light can be advantageously used to illuminate a passive analog display arranged near this side face. When the DELo display device forms a watch face, one can provide in the thickness of the latter a through opening forming a window and advantageously combined the DELo display device with a passive analog display device of the display type. date in which the date disc moves under the window and in which the information carried by the date disc visible through the window can be illuminated by the light extracted from the side walls of the window. The display device can also illuminate a secondary object placed close to the lateral face and substantially in the same plane as the substrate.

De préférence, ladite face latérale est dépolie de façon à produire en utilisation une lumière diffuse.Preferably, said side face is frosted so as to produce a diffuse light in use.

Avantageusement, ladite face latérale présente un angle compris entre 90 et 135° par rapport à la face avant.Advantageously, said side face has an angle between 90 and 135 ° relative to the front face.

Avantageusement, le substrat transparent présente un indice de réfraction plus élevé que l'indice de réfraction de la couche DELo de façon à confiner la lumière dans ce substrat.Advantageously, the transparent substrate has a higher refractive index than the refractive index of the LED layer so as to confine the light in this substrate.

Des caches opaques sont avantageusement disposés sur les faces latérales n'éclairant pas l'objet secondaire.Opaque covers are advantageously placed on the lateral faces which do not illuminate the secondary object.

Brève description des figuresBrief description of the figures

  • La figure 1 représente une vue en perspective d'une montre comprenant un ensemble d'affichage selon l'invention.The figure 1 shows a perspective view of a watch comprising a display assembly according to the invention.
  • La figure 2 représente une vue en coupe d'une montre comprenant un ensemble d'affichage selon l'invention représenté à la figure 1.The figure 2 shows a sectional view of a watch comprising a display assembly according to the invention shown in the figure 1 .
  • La figure 3 représente un agrandissement de la zone 10 de la figure 2.The figure 3 represents an enlargement of zone 10 of the figure 2 .
Description détaillée de l'inventionDetailed description of the invention

La présente invention vise à proposer un ensemble d'affichage comprenant un dispositif d'affichage à diode électroluminescentes organique (DELo) A, utilisé pour afficher à la demande des informations vers l'utilisateur, et un objet secondaire 6 à éclairer permettant d'utiliser au mieux la lumière émise par une ou des LED organiques du dispositif d'affichage DELo A, piégée entre les faces du substrat du dispositif et récupérée pour éclairer l'objet secondaire 6 associé à ce dispositif DELo.The present invention aims to provide a display assembly comprising an organic light-emitting diode (LED) display device A, used to display information on demand on demand, and a secondary object 6 to be illuminated making it possible to use at best the light emitted by one or more organic LEDs of the DELo A display device, trapped between the faces of the substrate of the device and recovered to illuminate the secondary object 6 associated with this DELo device.

Selon un mode de réalisation de l'invention représenté aux figures 1 à 3 on voit une montre M intégrant un dispositif d'affichage mixte comprenant un écran à éclairage actif A (rétroéclairé, LED ou DELo), qui peut être décoré sur sa face orientée vers l'utilisateur, et un affichage passif comprenant un cadran horaire coopérant avec des aiguilles 11 et un organe d'affichage 6 passif visible à travers un guichet 7 ménagé dans le cadran.According to one embodiment of the invention shown in Figures 1 to 3 we see a watch M integrating a mixed display device comprising an active lighting screen A (backlit, LED or LED), which can be decorated on its face oriented towards the user, and a passive display comprising a time dial cooperating with hands 11 and a passive display member 6 visible through a window 7 provided in the dial.

Tel que représenté à la figure 3, l'ensemble d'affichage de l'invention utilise la lumière piégée dans une couche transparente 2 de l'affichage actif par la réflexion totale en extrayant cette lumière par une face latérale 8 sensiblement perpendiculaire aux faces principales ou présentant un angle α compris entre 90° et 135° par rapport à la face avant. Le dispositif d'affichage actif de l'invention comprend une couche émettrice de type diode électroluminescente 1 organique DELo disposée sur la face arrière du substrat 2 transparent. Il peut s'agir d'un écran de type DELo à matrice active, ou d'un écran à cristaux liquides (LCD) notamment du type TFT associé à un dispositif de rétroéclairage comprenant une DELo ou une LED dans ce dernier cas la lumière est récupérée à partir des faces latérales du guide de lumière du dispositif de rétroéclairage Cet écran, dans la présente description est considéré comme l'affichage principal.As shown in the figure 3 , the display assembly of the invention uses the light trapped in a transparent layer 2 of the active display by total reflection by extracting this light by a side face 8 substantially perpendicular to the main faces or having an angle α between 90 ° and 135 ° relative to the front face. The active display device of the invention comprises an emitting layer of the organic light-emitting diode 1 LED 1 type disposed on the rear face of the transparent substrate 2. It can be an active matrix DELo type screen, or of a liquid crystal screen (LCD) in particular of the TFT type associated with a backlight device comprising an LED or an LED in the latter case the light is recovered from the lateral faces of the light guide of the backlight device This screen , in this description is considered the main display.

Dans un tel dispositif, seule la lumière 4 émise par la DELo présentant un angle par rapport à la normale à la surface du verre d'affichage inférieur à l'angle limite peut émerger de la face avant du substrat transparent.In such a device, only the light 4 emitted by the LED having an angle relative to normal to the surface of the display glass less than the limit angle can emerge from the front face of the transparent substrate.

Selon l'invention, une partie de la lumière piégée 5 entre les faces parallèles du substrat transparent 2 en raison de la réflexion totale est extraite par au moins une face latérale 8 réalisée dans la zone sélectionnée. Cette lumière peut alors être utilisée pour éclairer d'autres éléments 6 dits secondaires, tel qu'un affichage horaire analogique ou un organe d'affichage visible à travers le guichet 7 par exemple un disque de quantièmes 6.According to the invention, part of the light trapped 5 between the parallel faces of the transparent substrate 2 due to the total reflection is extracted by at least one side face 8 produced in the selected area. This light can then be used to illuminate other so-called secondary elements 6, such as an analog time display or a display member visible through the window 7, for example a date disc 6.

Il est possible de modifier le ratio entre la lumière émise par la face frontale avant et la lumière émise par la tranche ou face latérale du substrat en modifiant l'indice de réfraction du substrat : plus le substrat présente un indice de réfraction élevé, plus la lumière sera piégée dans la couche transparente 2. Il peut, de ce point de vue être avantageux d'utiliser un substrat 2 d'indice élevé, tel que le saphir dont l'indice de réfraction est de 1,768.It is possible to modify the ratio between the light emitted by the front end face and the light emitted by the edge or side face of the substrate by modifying the refractive index of the substrate: the higher the substrate has a high refractive index, the more light will be trapped in the transparent layer 2. It may, from this point of view be advantageous to use a substrate 2 of high index, such as sapphire whose refractive index is 1.768.

Une ou des couches supplémentaires 3 peuvent être ajoutées à la surface du substrat transparent 2. Ces couches peuvent par exemple servir de couche anti-rayure, antireflet, esthétique.One or more additional layers 3 can be added to the surface of the transparent substrate 2. These layers can for example serve as an anti-scratch, anti-reflective, aesthetic layer.

Les faces latérales 8 du substrat 2 présentent de préférence une texture réduisant la réflexion interne, afin d'optimiser l'extraction lumineuse. En particulier les techniques de découpe au jet d'eau, par meulage, ou par ultrasons ont pour effet avantageux de dépolir le flanc 8 du substrat 2, améliorant ainsi la diffusion et donc l'uniformité de la sortie de la lumière.The lateral faces 8 of the substrate 2 preferably have a texture reducing internal reflection, in order to optimize the light extraction. In particular, water jet, grinding or ultrasonic cutting techniques have the advantageous effect of frosting the flank 8 of the substrate 2, thereby improving the diffusion and therefore the uniformity of the light output.

Selon la position de l'objet secondaire 6 à éclairer, il peut être avantageux d'incliner le flanc 8 d'éclairage. En particulier, tel que représenté à la figure 1, un objet légèrement en retrait de l'affichage principal, tel que le serait un affichage du quantième classique par un disque de quantième entrainé mécaniquement (voir figures 2 et 3) est, de préférence, éclairé par des faces latérales orientées vers cet affichage secondaire, ce qui a pour avantage supplémentaire de réduire la vue directe vers l'utilisateur, et donc, de réduire l'éblouissement.Depending on the position of the secondary object 6 to be lit, it may be advantageous to tilt the lighting side 8. In particular, as shown in the figure 1 , an object slightly behind the main display, as would be a classic date display by a mechanically driven date disc (see figures 2 and 3 ) is preferably lit by side faces oriented towards this secondary display, which has the additional advantage of reducing the direct view towards the user, and therefore of reducing the glare.

Pour éviter tout éclairage parasite, les faces latérales n'éclairant pas d'objet secondaire peuvent avantageusement être couvertes d'une couche opaque 9, de préférence réfléchissante.To avoid any stray lighting, the lateral faces not illuminating any secondary object can advantageously be covered with an opaque layer 9, preferably reflecting.

Tel que représenté aux figures 2 et 3, le dispositif d'affichage à diode électroluminescentes organique (DELo) de l'invention est avantageusement intégré à des montres mixtes, comprenant un affichage traditionnel de l'heure comprenant des aiguilles 11 et un guichet 7 sous lequel est entrainé un disque de quantième 6. Dans ce cas, les aiguilles sont rétroéclairées par le dispositif affichage principal DELo qui forme un cadran situé derrière elles, tandis que le guichet 7 est éclairé par les faces latérales 8 du guichet 7 ménagé dans le substrat 2 du dispositif d'affichage à diodes électroluminescentes organiques (DELo) de l'invention.As shown in figures 2 and 3 , the organic light-emitting diode (LED) display device of the invention is advantageously integrated into mixed watches, comprising a traditional time display comprising hands 11 and a window 7 under which is driven a date disc 6 In this case, the hands are backlit by the main display device DELo which forms a dial behind them, while the window 7 is lit by the side faces 8 of the window 7 formed in the substrate 2 of the diode display device. organic electroluminescent (LED) of the invention.

Claims (11)

  1. Display assembly comprising:
    - an organic light-emitting diode (OLED) display device comprising at least one OLED (1) comprising an emitting stack,
    - a transparent, semi-transparent or translucent substrate (2) comprising a back face, a front face and a side face, and
    - a secondary object to be illuminated, characterised in that the organic light-emitting diode (OLED) is fastened onto the back face of the substrate and emits light which, on the one hand, originates from the front face of the substrate in order to provide a display and/or illumination function and, on the other hand, originates from the side face of the substrate in order to illuminate said secondary object.
  2. Assembly according to any of the preceding claims comprising an analogue time display.
  3. Assembly according to claim 2, wherein the secondary object (6) includes the analogue time dial.
  4. Assembly according to any of the preceding claims wherein the secondary object (6) is arranged inside a watch aperture.
  5. Assembly according to any of the preceding claims, wherein said side face (8) is depolished to produce diffused light during use.
  6. Positive assembly according to any of the preceding claims, wherein said side face (8) is at an angle of between 90 and 135° relative to the front face.
  7. Assembly according to any of the preceding claims, wherein said transparent substrate (2) has a refractive index of at least 1.5 and preferably comprised between 1.6 and 1.8.
  8. Assembly according to any of the preceding claims, wherein opaque covers (9) are arranged on the side faces that do not illuminate the secondary object (6).
  9. Assembly according to any of the preceding claims, wherein the front face of the substrate includes an integrated or added decoration.
  10. Assembly according to any of claims 1 to 8, wherein the substrate is surmounted by a semi-transparent dial.
  11. Watch including a display assembly according to any of the preceding claims.
EP17181521.0A 2017-07-14 2017-07-14 Display assembly Active EP3428739B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP17181521.0A EP3428739B1 (en) 2017-07-14 2017-07-14 Display assembly
JP2018130456A JP2019020404A (en) 2017-07-14 2018-07-10 Display assembly
CN202211476363.3A CN115793428A (en) 2017-07-14 2018-07-12 Display assembly
CN201810764665.8A CN109254520A (en) 2017-07-14 2018-07-12 display assembly
US16/034,904 US11249444B2 (en) 2017-07-14 2018-07-13 Display assembly
JP2021021891A JP7289858B2 (en) 2017-07-14 2021-02-15 display assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17181521.0A EP3428739B1 (en) 2017-07-14 2017-07-14 Display assembly

Publications (2)

Publication Number Publication Date
EP3428739A1 EP3428739A1 (en) 2019-01-16
EP3428739B1 true EP3428739B1 (en) 2020-06-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP17181521.0A Active EP3428739B1 (en) 2017-07-14 2017-07-14 Display assembly

Country Status (4)

Country Link
US (1) US11249444B2 (en)
EP (1) EP3428739B1 (en)
JP (2) JP2019020404A (en)
CN (2) CN109254520A (en)

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Publication number Priority date Publication date Assignee Title
EP3779612A1 (en) * 2019-08-16 2021-02-17 The Swatch Group Research and Development Ltd Method for broadcasting a message to the wearer of a watch
EP3789830B1 (en) * 2019-09-09 2024-04-03 The Swatch Group Research and Development Ltd Dial and method for manufacturing a dial for a watch
EP4102309A1 (en) * 2021-06-08 2022-12-14 The Swatch Group Research and Development Ltd Timepiece including a trim component provided with a part made of zirconia

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JPH0949887A (en) * 1995-08-04 1997-02-18 Casio Comput Co Ltd Illumination device
CH691333A5 (en) * 1997-02-19 2001-06-29 Asulab Sa Device for uniform illumination of the dial of a display device.
JP4599637B2 (en) * 1999-09-30 2010-12-15 カシオ計算機株式会社 Clock dial and clock
JP2001296374A (en) * 2000-04-13 2001-10-26 Casio Comput Co Ltd Dial for timepiece, its manufacturing method, and timepiece
JP2004198681A (en) * 2002-12-18 2004-07-15 Casio Comput Co Ltd Lighting system and electronic equipment
EP1666992A1 (en) * 2004-12-02 2006-06-07 Asulab S.A. Timepiece comprising a luminous decoration
EP1780615A1 (en) * 2005-10-28 2007-05-02 Montres Rado S.A. Display unit with decorative effect for a portable instrument, such as a watch
CN103645623A (en) * 2009-06-18 2014-03-19 Eta瑞士钟表制造股份有限公司 Timepiece with special decorative effects
CH702419A2 (en) * 2009-12-22 2011-06-30 Swatch Group Res & Dev Ltd Timepiece i.e. electronic watch, has luminous device arranged so as to project shades of element arranged between luminous device and bottom of case or dial over dial or bottom of case when luminous device is utilized
EP2814078B1 (en) 2013-06-14 2016-02-10 Saint-Gobain Glass France Transparent diffusive oled substrate and method for producing such a substrate
JP6565139B2 (en) * 2014-06-27 2019-08-28 カシオ計算機株式会社 Electronic clock
KR102386706B1 (en) * 2015-06-11 2022-04-14 삼성디스플레이 주식회사 Display device and watch having the same

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Also Published As

Publication number Publication date
JP7289858B2 (en) 2023-06-12
CN109254520A (en) 2019-01-22
JP2021073475A (en) 2021-05-13
CN115793428A (en) 2023-03-14
US20190018372A1 (en) 2019-01-17
EP3428739A1 (en) 2019-01-16
JP2019020404A (en) 2019-02-07
US11249444B2 (en) 2022-02-15

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