EP2054905B1 - Combined display and detection structure - Google Patents

Combined display and detection structure Download PDF

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Publication number
EP2054905B1
EP2054905B1 EP07802413A EP07802413A EP2054905B1 EP 2054905 B1 EP2054905 B1 EP 2054905B1 EP 07802413 A EP07802413 A EP 07802413A EP 07802413 A EP07802413 A EP 07802413A EP 2054905 B1 EP2054905 B1 EP 2054905B1
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EP
European Patent Office
Prior art keywords
detection structure
combined display
structure according
light
produced
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EP07802413A
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German (de)
French (fr)
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EP2054905A1 (en
Inventor
Patrice Laurent
Xavier Drouin
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Dav SA
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Dav SA
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
    • H01H13/704—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by the layers, e.g. by their material or structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2209/00—Layers
    • H01H2209/016—Protection layer, e.g. for legend, anti-scratch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2209/00—Layers
    • H01H2209/024—Properties of the substrate
    • H01H2209/038—Properties of the substrate transparent
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2209/00—Layers
    • H01H2209/024—Properties of the substrate
    • H01H2209/038—Properties of the substrate transparent
    • H01H2209/04—Glass
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2209/00—Layers
    • H01H2209/068—Properties of the membrane
    • H01H2209/082—Properties of the membrane transparent
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/036—Light emitting elements

Definitions

  • touch zones for selection of electric or electronic organs 11 (for example “GENERAL MENU” “RADIO”, “CD”, “NAVIGATION”, “TELEPHONE” and “AIR CONDITIONING” ")
  • a conventional alphanumeric keyboard 13 to twelve touch keys (the numbers” 0 "to” 9 "as well as the symbols” # "and” * ").
  • Each zone or key comprises a symbol such as a pictogram or a writing in the form of an inscription of letter (s) or number (s) related to the function to be controlled.
  • These symbols may be permanently visible according to a first embodiment or, according to a second embodiment, only if a backlighting is applied ("Black panel” technology, that is to say the technology of black panel ").

Landscapes

  • Illuminated Signs And Luminous Advertising (AREA)
  • Push-Button Switches (AREA)

Abstract

The present invention relates to a combined display and detection structure to be lighted from a back surface by a light source (25). The structure comprises a support layer (31) defining the back surface and made of a rigid and translucent material, a sensitive layer (33) of detection sensors provided on the support layer and comprising opaque sensitive portions (35) regularly distributed as well as inactive portions (37) transparent to light and provided between the sensitive portions (33), and a protecting coating (39) of the sensor layer comprising at least one portion that is transparent to light and has the shape of a symbol (49) such as a pictogram or a writing appearing as a display when the structure is lighted by the light (25) source from its back surface.

Description

La présente invention est relative à une structure combinée d'affichage et de détection, en particulier pour véhicule automobile.The present invention relates to a combined display and detection structure, in particular for a motor vehicle.

Dans le domaine automobile, les commandes de divers organes électriques sont réalisées classiquement par des commutateurs / interrupteurs. Toutefois, au vu du nombre croissant d'organes électriques à commander, des dispositifs de commande multifonctions sont de plus en plus utilisés du fait des avantages ergonomiques qui en résultent. En effet, à partir d'un seul bouton de commande, réalisé par exemple sous forme d'un joystick, associé à un écran d'affichage, on peut naviguer dans des menus déroulants pour commander par exemple la climatisation, le système audio ou encore le système de navigation.In the automotive field, the controls of various electrical components are conventionally performed by switches / switches. However, in view of the increasing number of electrical components to be controlled, multifunctional control devices are increasingly used because of ergonomic benefits that result. Indeed, from a single command button, made for example in the form of a joystick, associated with a display screen, you can navigate in drop-down menus to control for example the air conditioning, the audio system or even the navigation system.

Pour augmente le confort ergonomique, l'utilisation d'une technologie à capteur tactile, seul ou en complément de tels boutons multifonctions, peut être considérée comme un développement intéressant.To increase the ergonomic comfort, the use of a touch sensor technology, alone or in addition to such multifunction buttons, can be considered as an interesting development.

En effet, les capteurs tactiles, en particulier pour le domaine automobile, ont fait des progrès importants. Une technologie utilisant des résistances sensibles à la pression (également connu sous le nom capteur FSR pour « Force Sensing Resistor ») devance de plus en plus d'autres technologies équivalentes, comme par exemple des technologies capacitives ou encore optiques grâce à sa facilité de mise en oeuvre et sa robustesse.Indeed, tactile sensors, especially for the automotive field, have made significant progress. A technology using pressure-sensitive resistors (also known as FSR sensor for "Force Sensing Resistor") is ahead of more and more other equivalent technologies, such as capacitive or optical technologies thanks to its ease of use. implemented and its robustness.

De tels capteurs sont par exemple connus sous le nom tablette digitalisante (dénomination anglaise "Digitizer pad") et on cite comme art antérieur les documents suivants : US 4,810,992 , US 5,008,497 , FR 2683649 ou encore EP 0 541 102 .Such sensors are for example known as the digitizing tablet ("Digitizer pad") and the following documents are cited as prior art: US 4,810,992 , US5,008,497 , FR 2683649 or EP 0 541 102 .

Ces capteurs comprennent des couches semi-conductrices souples prises en sandwich entre par exemple une couche conductrice et une couche résistive. En exerçant une pression sur la couche FSR, sa résistance ohmique diminue permettant ainsi, par application d'une tension électrique adaptée, de mesurer la pression appliquée et / ou la localisation de l'endroit où la pression est exercée.These sensors comprise flexible semiconductor layers sandwiched between, for example, a conductive layer and a resistive layer. By exerting pressure on the FSR layer, its ohmic resistance decreases allowing, by applying a suitable voltage, to measure the pressure applied and / or the location of the place where the pressure is exerted.

Selon une conception différente de la technologie FSR, le capteur tactile comprend deux feuilles souples de support espacées l'une de l'autre par des entretoises élastiques et portant sur des faces mutuellement en regard des éléments permettant de réaliser un contact électrique lors de la compression du capteur (voir par exemple EP 1 429 355 US 4 786 767 , et EP 1 429 356 ).According to a different design of the FSR technology, the touch sensor comprises two flexible support sheets spaced from each other by elastic spacers and bearing on mutually opposite faces elements for making an electrical contact during the compression of the sensor (see for example EP 1 429 355 US 4,786,767 , and EP 1 429 356 ).

Toutefois, les capteurs connus sont de par leur conception généralement opaque, ce qui pose des problèmes pour l'éclairage des commandes pour la conduite de nuit dans un véhicule automobile.However, the known sensors are by their design generally opaque, which poses problems for lighting controls for driving at night in a motor vehicle.

En effet, le rétro - éclairage de symboles de signalisation, c'est-à-dire l'éclairage par la face arrière, s'est imposé dans le domaine automobile pour ses avantages en termes d'ergonomie et de possibilités d'intégration au niveau d'une commande. Pour un bouton de commande, on prévoit par exemple sur sa face de commande un pictogramme montrant la fonction qui peut être commandée par ce bouton. Ce pictogramme est souvent réalisé en une matière plastique de couleur blanche laissant passer la lumière d'une diode électroluminescente ou d'une lampe placée derrière le pictogramme. Lors de la conduite de jour, le conducteur aperçoit clairement le pictogramme blanc sur le bouton, et lors de la conduite de nuit, le rétro - éclairage permet au conducteur une localisation aisée de la commande.Indeed, the backlighting of signaling symbols, that is to say the lighting by the rear face, has imposed itself in the automotive field for its advantages in terms of ergonomics and possibilities of integration into the vehicle. level of an order. For a command button, there is for example on its control side a pictogram showing the function that can be controlled by this button. This pictogram is often made of a white plastic material letting the light of a light emitting diode or a lamp placed behind the pictogram. During daytime driving, the driver clearly sees the white pictogram on the button, and when driving at night, the backlighting allows the driver to easily locate the control.

Pour résoudre ce problème en relation avec des capteurs tactiles précités, il a été proprosé de ménager des ouvertures dans la surface sensible du capteur afin de permettre un rétro - éclairage du capteur au travers de ces ouvertures. Toutefois, ces ouvertures diminuent considérablement la surface active du capteur aux endroits de commande ce qui n'est pas souhaitable.To solve this problem in connection with aforementioned touch sensors, it has been proposed to provide openings in the sensitive surface of the sensor to allow a backlight sensor through these openings. However, these openings significantly reduce the active surface of the sensor at control locations which is not desirable.

Une autre solution consiste en un éclairage en biais de côté, mais pour obtenir une bonne homogénéité du flux lumineux, la mise au point de cette solution s'avère difficile, en particulier en respectant les contraintes visant un nombre réduit de sources lumineuses et un faible encombrement.Another solution consists of side-angled illumination, but to obtain a good homogeneity of the luminous flux, the development of this solution proves difficult, in particular while respecting the constraints aiming at a reduced number of light sources and a weak footprint.

La présente invention vise à proposer une structure combinée d'affichage et de détection qui puisse bénéficier d'un rétro - éclairage pour un meilleur repérage des fonctions à commander, en particulier lors de la conduite de nuit.The present invention aims at providing a combined display and detection structure which can benefit from a backlight for better identification of the functions to be controlled, in particular during night driving.

A cet effet, l'invention a pour objet une structure combinée d'affichage et de détection destinée à être éclairée depuis une face arrière par l'intermédiaire d'une source lumineuse, caractérisée en ce qu'elle comprend

  • une couche support formant la face arrière et réalisée en un matériau rigide et translucide,
  • une couche sensible de capteur de détection placée sur la couche support et comportant des portions sensibles opaques régulièrement réparties et des portions inactives laissant passer la lumière et situées entre les portions sensibles, et
  • un revêtement de protection de la couche sensible de capteur présentant au moins une portion laissant passer la lumière et ayant la forme d'un symbole tel qu'un pictogramme ou d'une écriture apparaissant comme affichage lorsque la structure est éclairée par une source lumineuse depuis sa face arrière.
For this purpose, the subject of the invention is a combined display and detection structure intended to be illuminated from a rear face by means of a light source, characterized in that it comprises
  • a support layer forming the rear face and made of a rigid and translucent material,
  • a detection sensor sensitive layer placed on the support layer and having regularly opaque sensitive portions and inactive portions passing light and located between the sensitive portions, and
  • a protective coating of the sensor sensitive layer having at least one light-transmitting portion and having the form of a symbol such as a pictogram or a writing appearing as a display when the structure is illuminated by a light source from its back side.

D'autres caractéristiques et avantages de l'invention ressortiront de la description suivante, donnée à titre d'exemple, sans caractère limitatif, en regard des dessins annexés sur lesquels :

  • la figure 1 montre une vue en perspective un module de commande multifonctions comprenant une structure combinée d'affichage et de détection selon l'invention,
  • la figure 2 montre une vue en coupe d'une structure combinée d'affichage et de détection selon l'invention, et
  • la figure 3 est une vue de principe de la couche sensible du capteur de détection.
Other features and advantages of the invention will emerge from the following description given by way of example, without limitation, with reference to the accompanying drawings, in which:
  • the figure 1 shows a perspective view of a multifunctional control module comprising a combined display and detection structure according to the invention,
  • the figure 2 shows a sectional view of a combined display and detection structure according to the invention, and
  • the figure 3 is a principle view of the sensitive layer of the detection sensor.

Un exemple de réalisation non limitatif de l'invention pour une application de commandes multifonctions sera décrit par la suite en relation aux figures annexées.An exemplary non-limiting embodiment of the invention for an application of multifunctional controls will be described later in relation to the appended figures.

La figure 1 montre un module de commande multifonctions 1 se présentant sous une forme générale parallélépipédique et destiné à être monté dans un véhicule automobile, de préférence au niveau de la console du milieu entre les deux sièges avant.The figure 1 shows a multifunctional control module 1 in a generally parallelepipedal shape and intended to be mounted in a motor vehicle, preferably at the center console between the two front seats.

Bien entendu, d'autre formes et d'autres emplacements peuvent être envisagés en fonction des commandes à réaliser et leur emplacement habituel.Of course, other shapes and other locations can be considered depending on the orders to be made and their usual location.

Le module comprend une surface de commande tactile 3 indiquée en traits pointillés et, de manière facultative, un logement 5 pour recevoir par exemple un bouton multifonctions tel qu'un joystick.The module comprises a tactile control surface 3 indicated in dashed lines and, optionally, a housing 5 for receiving for example a multifunction button such as a joystick.

A l'intérieur de la surface de commande tactiles 3 sont définies six zones tactiles de sélection d'organes électriques ou électroniques 11 (par exemple «MENU GENERAL» « RADIO », « CD », « NAVIGATION », « TELEPHONE» et « CLIMATISATION») ainsi qu'un clavier alphanumérique classique 13 à douze touches tactiles (les chiffres «0 » à «9 » ainsi que les symboles «# » et « * »). Chaque zone ou touche comporte un symbole tel qu'un pictogramme ou une écriture sous forme d'une inscription de lettre(s) ou de chiffre(s) en rapport avec la fonction à commander. Ces symboles peuvent être visible en permanence selon un premier mode de réalisation ou, selon un second mode de réalisation, seulement si un rétro - éclairage est appliqué (technologie du « Black panel», c'est-à-dire de la technologie du « panneau noir »).Inside the touch control surface 3 are defined six touch zones for selection of electric or electronic organs 11 (for example "GENERAL MENU" "RADIO", "CD", "NAVIGATION", "TELEPHONE" and "AIR CONDITIONING" ") As well as a conventional alphanumeric keyboard 13 to twelve touch keys (the numbers" 0 "to" 9 "as well as the symbols" # "and" * "). Each zone or key comprises a symbol such as a pictogram or a writing in the form of an inscription of letter (s) or number (s) related to the function to be controlled. These symbols may be permanently visible according to a first embodiment or, according to a second embodiment, only if a backlighting is applied ("Black panel" technology, that is to say the technology of black panel ").

Le module de commande 1 comprend un support mécanique 15 rigide, par exemple réalisé en matière plastique, avec deux parois latérales 17 et une partie horizontale légèrement bombée / galbée 19 soutenue par les parois 17.The control module 1 comprises a rigid mechanical support 15, for example made of plastic, with two side walls 17 and a slightly curved / curved horizontal portion 19 supported by the walls 17.

Entre les parois 17 est maintenue une carte à circuit imprimé 23 portant des sources lumineuses 25 (voir figure 2), telles que des diodes électroluminescentes (« LED » pour « light emitting diodes », c'est-à-dire des diodes d'émission de lumière).Between walls 17 is maintained a printed circuit board 23 carrying light sources 25 (see FIG. figure 2 ), such as light emitting diodes ("LEDs"), that is light emitting diodes.

Dans la partie 19 du support 15 sont ménagées des ouvertures 27 (voir figure 2) permettant de laisser passer la lumière provenant des sources lumineuses 25 et définissant des régions de rétro -éclairage des symboles 11 et 13 de la zone tactile 3. De préférence, on prévoit une source lumineuse 25 par région de rétro - éclairage pour obtenir un résultat d'éclairage optimal.In the part 19 of the support 15 are formed openings 27 (see figure 2 ) for passing light from the light sources 25 and defining backlit regions of the symbols 11 and 13 of the touch zone 3. Preferably, there is provided a light source 25 per backlighting region to obtain a result optimal lighting.

Bien entendu, sans sortir du cadre de la présente invention, on peut également prévoir une source lumineuse sous forme d'une diode ou lampe avec un ou plusieurs guide(s) de lumière qui amène(nt) le flux lumineux aux endroits appropriés.Of course, without departing from the scope of the present invention, it is also possible to provide a light source in the form of a diode or lamp with one or more light guide (s) which brings (s) the luminous flux to the appropriate places.

Sur le support 15 est placée une structure combinée 29 d'affichage et de détection selon l'invention, destinée à être éclairée depuis sa face arrière par l'intermédiaire des sources lumineuses 25.On the support 15 is placed a combined display and detection structure 29 according to the invention, intended to be illuminated from its rear face by means of the light sources 25.

Pour une description détaillée de cette structure combinée, on se réfère par la suite à la figure 2 qui montre un schéma de principe en coupe de cette structure. On attire l'attention sur le fait que les épaisseurs des diverses couches et matériaux ne sont pas à l'échelle et ont été modifiées pour mieux pouvoir expliquer l'invention.For a detailed description of this combined structure, reference is then made to the figure 2 which shows a schematic diagram in section of this structure. Attention is drawn to the fact that the thicknesses of the various layers and materials are not to scale and have been modified to better explain the invention.

La structure combinée 29 comprend trois couches successives, à savoir une couche support 31 formant la face arrière et réalisée en un matériau rigide et translucide, une couche sensible 33 de capteur de détection placée sur la couche support 31 et comportant des portions sensibles 35 opaques régulièrement réparties et des portions inactives 37 laissant passer la lumière et situées entre les portions sensibles 35, et enfin un revêtement de protection 39 de la couche de capteur 33 présentant au moins une portion 41 laissant passer la lumière et ayant la forme d'un symbole 11 ou 13 tel qu'un pictogramme ou une écriture apparaissant comme affichage lorsque la structure est éclairée par une source lumineuse depuis sa face arrière.The combined structure 29 comprises three successive layers, namely a support layer 31 forming the rear face and made of a rigid and translucent material, a sensitive sensor detection layer 33 placed on the support layer 31 and comprising opaque sensitive portions regularly. distributed and inactive portions 37 passing the light and located between the sensitive portions 35, and finally a protective coating 39 of the sensor layer 33 having at least a portion 41 passing through the light and having the shape of a symbol 11 or 13 such as a pictogram or a writing appearing as a display when the structure is illuminated by a light source from its rear face.

La couche support 31 est réalisée en matière plastique, de préférence chargée de diffuseurs de lumière qui sont par exemple formées par des billes de verre (non représentées).The support layer 31 is made of plastic material, preferably filled with light diffusers which are for example formed by glass beads (not shown).

La couche sensible 33 fait partie d'un capteur tactile, préférentiellement un capteur sensible à la pression exercée sur le revêtement de protection 39.The sensitive layer 33 is part of a tactile sensor, preferably a pressure sensitive sensor exerted on the protective coating 39.

Avantageusement le capteur tactile est un capteur réalisé selon la technologie connue sous le nom FSR telle que décrit par exemple dans les documents US 4,810,992 , US 5,008,497 , FR 2683649 , EP 0 541 102 , ou encore les documents EP 1 429 355 et EP 1 429 356 .Advantageously, the touch sensor is a sensor made according to the technology known by the name FSR as described for example in the documents US 4,810,992 , US5,008,497 , FR 2683649 , EP 0 541 102 , or the documents EP 1 429 355 and EP 1 429 356 .

Comme on le voit sur la figure 3, les portions sensibles 35 opaques sont réalisées sous forme d'un motif de deux jeux de lignes parallèles perpendiculaires 42A et 42B formant une grille 43. Cette grille 43 est réalisée avec des encres résistives appliquées par sérigraphie. Cette version à grille est adaptée pour connaître la position en x et en y d'un doigt sur la surface tactile 3.As we see on the figure 3 , the opaque sensitive portions are made in the form of a pattern of two sets of perpendicular parallel lines 42A and 42B forming a grid 43. This grid 43 is made with resistive inks applied by screen printing. This grid version is adapted to know the position in x and y of a finger on the touch surface 3.

Selon une version simplifiée, par exemple si on souhaite seulement connaître un déplacement selon une seule direction (par exemple en x) pour une commande de l'intensité d'une grandeur à régler telle que le volume audio, on prévoit que les portions opaques forment seulement un motif de lignes parallèles.According to a simplified version, for example if it is only desired to know a displacement in one direction (for example in x) for controlling the intensity of a quantity to be adjusted such as the audio volume, it is expected that the opaque portions form only a pattern of parallel lines.

En prenant des motifs avec des lignes parallèles ou le motif sous forme d'une grille, on comprend que les portions sensibles opaques sont régulièrement réparties sur la surface du capteur. Bien entendu, d'autres formes de motifs avec une répartition régulière des portions sensibles peuvent être envisagées sans sortir du cadre de la présente invention.By taking patterns with parallel lines or the pattern in the form of a grid, it is understood that the opaque sensitive portions are evenly distributed over the surface of the sensor. Of course, other forms of patterns with regular distribution of the sensitive portions can be envisaged without departing from the scope of the present invention.

Le revêtement de protection 39 est réalisé en un matériau élastique de préférence en un matériau translucide ce permet de mieux diffuser la lumière venant de la source lumineuse.The protective coating 39 is made of an elastic material preferably of a translucent material that allows better distribution of light from the light source.

Afin d'augmenter encore l'homogénéité d'éclairage des pictogrammes, le revêtement de protection 39 peut être chargé de matériaux ou de particules diffuseurs de lumière avec une teneur comprise avantageusement entre 0,2% et 0,25%. Ces particules peuvent par exemple être de simples billes de verre ou des particules blanches.In order to further increase the illumination homogeneity of the pictograms, the protective coating 39 may be loaded with light diffusing materials or particles with a content advantageously between 0.2% and 0.25%. These particles may for example be simple glass beads or white particles.

Comme matériau, on peut utiliser de la silicone ou encore en variante une feuille de polycarbonate d'une épaisseur comprise entre 0,1mm et 0,5mm, de préférence égale à environ 0,2mm.As a material, it is possible to use silicone or alternatively a polycarbonate sheet with a thickness of between 0.1 mm and 0.5 mm, preferably equal to about 0.2 mm.

Comme on le voit sur la figure 2, à l'exception des portions 41 laissant passer la lumière et ayant la forme d'un symbole, la face externe 47 du revêtement de protection 39 est couverte d'un film opaque 49 telle qu'une couche de peinture ou une pulvérisation de particules métalliques.As we see on the figure 2 , except for the light-transmitting portions 41 and in the form of a symbol, the outer face 47 of the protective coating 39 is covered with an opaque film 49 such as a layer of paint or a particle spray metal.

Selon une autre variante, cette couche de protection 39 est réalisée suivant la technologie « Black Panel » (c'est-à-dire une technologie dite du « panneau noir ») qui est décrite dans les documents DE2613024 , DE19702957 , DE19705536 , DE19935386 , EP0803711 , ou WO2005035299 . Dans ce cas, les symboles / signes tels que les chiffres, lettres ou pictogrammes sont réalisés de manière qu'ils ne sont visibles qu'en cas de rétro - éclairage. Par conséquent, en absence d'une source lumineuse, le revêtement de protection 39 apparaît uniforme sans aucune indication ou écriture au niveau de la surface tactile 3.According to another variant, this protection layer 39 is produced according to the "Black Panel" technology (that is to say a so-called "black panel" technology) which is described in the documents DE2613024 , DE19702957 , DE19705536 , DE19935386 , EP0803711 , or WO2005035299 . In this case, symbols / signs such as numbers, letters or pictograms are made in such a way that they are only visible in case of backlighting. Therefore, in the absence of a light source, the protective coating 39 appears uniform without any indication or writing on the tactile surface 3.

Le principe de fonctionnement de la structure combinée 29 est également illustré sur la figure 2. A titre d'exemple, on a dessiné pour chaque source lumineuse 25 trois rayons lumineux de sortie 50. Ces rayons sont diffusés dans la couche support 31 pour donner chacun naissance à une multitude de rayons se propageant dans des directions diverses. Certains rayons sont arrêtés par les portions sensibles opaques 35 et certaines autres parviennent dans la couche de protection 39 où le phénomène de diffusion est avantageusement répété. Puis, des faisceaux de rayons sortent au niveau des portions 41.The operating principle of the combined structure 29 is also illustrated on the figure 2 . By way of example, three luminous output rays 50 have been drawn for each light source 25. These rays are diffused in the support layer 31 to each give rise to a multitude of rays propagating in various directions. Some rays are stopped by the opaque sensitive portions 35 and some others arrive in the protective layer 39 where the diffusion phenomenon is advantageously repeated. Then beams of rays emerge at portions 41.

Par ces phénomènes de diffusion, on obtient avantageusement un éclairage homogène des symboles sous forme de pictogrammes ou d'écritures et on parvient à estomper, voir à faire disparaître tout ombre ou inhomogénéité résultant des parties sensibles opaques 35 du capteur tactile au niveau de l'affichage perceptible par l'utilisateur.By these diffusion phenomena, we advantageously obtain a uniform illumination of the symbols in the form of pictograms or writings and we succeed in blurring, or even disappearing, any shadow or inhomogeneity resulting from the opaque sensitive parts 35 of the tactile sensor at the level of the perceptible display by the user.

Plus précisément, la structure combinée d'affichage et de détection 29 trouve une application très large en particulier dans le domaine automobile.More precisely, the combined display and detection structure 29 finds a very wide application, particularly in the automotive field.

Ainsi, une tel structure combinée d'affichage et de détection trouve une application avantageuse pour les commandes se trouvant au niveau de la console entre les deux sièges avant d'un véhicule automobile pour par exemple commander des fonctions de climatisation, d'un système audio, d'un système de téléphonie ou encore d'un système de navigation.Thus, such a combined display and detection structure finds an advantageous application for the controls located at the console between the two front seats of a motor vehicle for example to control air conditioning functions, an audio system , a telephony system or a navigation system.

L'invention peut aussi être appliquée dans une région du véhicule appelée le dôme qui se situe au niveau de l'emplacement habituel du rétroviseur intérieur, pour par exemple commander des lumières intérieures, un verrouillage central, un toit ouvrant, les feux de détresse ou les lumières d'ambiance.The invention can also be applied in a region of the vehicle called the dome which is located at the usual location of the interior rearview mirror, for example to control interior lights, central locking, sunroof, hazard lights or the mood lights.

Cette structure combinée peut également servir pour les commandes de lève-vitres, des commandes de positionnement des rétroviseurs extérieurs ou encore des commandes de déplacement de sièges motorisés.This combined structure can also be used for window lifts, exterior mirror positioning controls or motorized seat motion controls.

Claims (16)

  1. Combined display and detection structure intended to be illuminated from a rear face via a light source (25), characterized in that it comprises
    • a support layer (31) forming the rear face and produced in a rigid and translucent material,
    • a detection sensor sensitive layer (33) placed on the support layer and comprising regularly distributed opaque sensitive portions (35) and inactive portions (37) allowing the light to pass and situated between the sensitive portions (33), and
    • a protection coating (39) for the sensor layer having at least one portion allowing the light to pass and having the form of a symbol (11, 13) such as a pictogram or a text appearing as display when the structure is illuminated by a light source (25) from its rear.
  2. Combined display and detection structure according to Claim 1, characterized in that the support layer (31) is produced in a plastic material, preferably charged with light diffusers.
  3. Combined display and detection structure according to Claim 2, characterized in that the light diffusers are formed by glass balls.
  4. Combined display and detection structure according to any one of Claims 1 to 3, characterized in that the sensor (33) is a touch sensor.
  5. Combined display and detection structure according to Claim 4, characterized in that the touch sensor (33) is a sensor sensitive to the pressure exerted on the protection coating.
  6. Combined display and detection structure according to Claim 5, characterized in that the touch sensor (33) is a sensor produced according to the technology known by the name FSR.
  7. Combined display and detection structure according to Claim 6, characterized in that the opaque sensitive portions (35) comprise resistive inks.
  8. Combined display and detection structure according to any one of Claims 1 to 7, characterized in that the opaque portions (35) form a pattern of parallel lines or a grid pattern (43).
  9. Combined display and detection structure according to any one of Claims 1 to 8, characterized in that the protection coating (39) is produced in an elastic material.
  10. Combined display and detection structure according to Claim 9, characterized in that the protection coating (39) is produced in a translucent material.
  11. Combined display and detection structure according to Claim 9 or 10, characterized in that the protection coating (39) is produced in a material charged with light-diffusing particles.
  12. Combined display and detection structure according to Claim 11, characterized in that the content of light-diffusing particles is between 0.2% and 0.25%.
  13. Combined display and detection structure according to any of Claims 9 to 12, characterized in that the protection coating (39) is produced in silicone.
  14. Combined display and detection structure according to any one of Claims 9 to 12, characterized in that the protection coating (39) is produced as a polycarbonate sheet with a thickness of between 0.1 mm and 0.5 mm, preferably equal to approximately 0.2 mm.
  15. Combined display and detection structure according to any one of Claims 9 to 14, characterized in that the symbols (11, 13) such as a pictogram or a text are produced in such a way that they are visible only by backlighting.
  16. Combined display and detection structure according to any one of Claims 9 to 15, characterized in that the external face (47) of the protection coating is covered with an opaque film (49) apart from said portion (41) allowing the light to pass and having the form of a symbol such as a pictogram or a text appearing as display when the structure is illuminated by a light source from its rear face.
EP07802413A 2006-08-23 2007-07-26 Combined display and detection structure Active EP2054905B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0607485A FR2905194B1 (en) 2006-08-23 2006-08-23 COMBINED DISPLAY AND DETECTION STRUCTURE
PCT/EP2007/057725 WO2008022870A1 (en) 2006-08-23 2007-07-26 Combined display and detection structure

Publications (2)

Publication Number Publication Date
EP2054905A1 EP2054905A1 (en) 2009-05-06
EP2054905B1 true EP2054905B1 (en) 2012-08-08

Family

ID=37829657

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07802413A Active EP2054905B1 (en) 2006-08-23 2007-07-26 Combined display and detection structure

Country Status (4)

Country Link
EP (1) EP2054905B1 (en)
ES (1) ES2393004T3 (en)
FR (1) FR2905194B1 (en)
WO (1) WO2008022870A1 (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6032214A (en) * 1983-08-02 1985-02-19 キヤノン株式会社 Keyboard
US4786767A (en) * 1987-06-01 1988-11-22 Southwall Technologies Inc. Transparent touch panel switch
US5623280A (en) * 1994-06-17 1997-04-22 Motorola, Inc. Flexible liquid crystal display with touch sensitive screens

Also Published As

Publication number Publication date
FR2905194B1 (en) 2008-10-10
EP2054905A1 (en) 2009-05-06
FR2905194A1 (en) 2008-02-29
ES2393004T3 (en) 2012-12-17
WO2008022870A1 (en) 2008-02-28

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