WO2016135392A1 - Interaction interface comprising a touch screen and a proximity detector - Google Patents

Interaction interface comprising a touch screen and a proximity detector Download PDF

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Publication number
WO2016135392A1
WO2016135392A1 PCT/FR2016/050344 FR2016050344W WO2016135392A1 WO 2016135392 A1 WO2016135392 A1 WO 2016135392A1 FR 2016050344 W FR2016050344 W FR 2016050344W WO 2016135392 A1 WO2016135392 A1 WO 2016135392A1
Authority
WO
WIPO (PCT)
Prior art keywords
touch screen
interaction interface
transmitter
front face
support plate
Prior art date
Application number
PCT/FR2016/050344
Other languages
French (fr)
Inventor
Waad NASSAR
Original Assignee
Renault S.A.S
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Renault S.A.S filed Critical Renault S.A.S
Priority to EP16714959.0A priority Critical patent/EP3262492A1/en
Publication of WO2016135392A1 publication Critical patent/WO2016135392A1/en

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/0304—Detection arrangements using opto-electronic means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/0304—Detection arrangements using opto-electronic means
    • G06F3/0308—Detection arrangements using opto-electronic means comprising a plurality of distinctive and separately oriented light emitters or reflectors associated to the pointing device, e.g. remote cursor controller with distinct and separately oriented LEDs at the tip whose radiations are captured by a photo-detector associated to the screen
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
    • G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04104—Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04106—Multi-sensing digitiser, i.e. digitiser using at least two different sensing technologies simultaneously or alternatively, e.g. for detecting pen and finger, for saving power or for improving position detection

Definitions

  • the present invention generally relates to the field of interaction interfaces allowing a user to interact with an electronic device.
  • a touch screen having a front face (turned towards the user) substantially flat
  • a proximity detector comprising at least one emitter radiating in an infrared range and located on the periphery of said touch screen, and at least one receiver adapted to detect radiation in said infrared range.
  • Interaction interfaces including a touch screen are becoming more common in the everyday environment. Such interfaces equip for example a growing number of mobile phones, touch screen tablets, ticket vending machines, machine tools, or motor vehicles.
  • such an interface can for example be used to control a radio. It can also be used to display geolocation information.
  • an interaction interface comprising a touch screen, a proximity sensor for detecting that a hand of a user approaches the interface, and may also, for example, determine a position of this hand facing the touch screen.
  • the latter can optimize the content of the information displayed, so as to adapt to the behavior of the user before he even touches the touch screen.
  • the interface For example, if approaching, if the interface was in a standby state, it can switch from this standby state to a standard operating state. Or, if an approach to a particular area of the screen is detected, this area can then be displayed in an enlarged manner, for example in full screen.
  • Such arrangements are particularly interesting when the user of the interaction interface is brought to interact with it while performing other actions. for example while driving a motor vehicle, or while driving a machine tool.
  • a proximity detector by means of a transmitter which radiates in an infrared range and which is located on the periphery of said touch screen, and a receiver adapted to detect radiation in said infrared range.
  • the radiation thus emitted is directed towards the outside of the interaction interface. If a hand of a user, for example, is facing the detector, near the latter, it reflects a portion of the radiation emitted to the receiver, which thus detects its presence.
  • the emitter In general, it is desirable for the emitter to illuminate an area of the space located at the front of the touch screen, vis-à-vis the latter, since it is in this area that one wants to be able to detect the hand of a user of the interface.
  • the area located above the front face of the touch screen, in the immediate vicinity of it, is only very dimly lit by the transmitter, and such a proximity detector does not can detect the hand of a user.
  • the present invention proposes an interaction interface as defined in the preamble, in which it is provided that said emitter is fixedly mounted on a printed circuit support plate. which is inclined with respect to the front face of said touch screen such that said emitter has an average direction of emission directed towards the space situated in front of said touch screen.
  • the average direction of the light beam emitted by the proximity sensor of such an interface is thus inclined relative to a direction perpendicular to the front face of the touch screen, and directed towards it.
  • the transmitter is positioned on the periphery of the touch screen, it effectively illuminates an area of the space at the front of the touch screen, vis-à-vis the latter.
  • an area located vis-à-vis the front face of the touch screen, in the immediate vicinity thereof, can be effectively illuminated by the transmitter, which allows to detect the hand of a user, as explained above. Being able to detect the hand of a user in such a zone is particularly interesting, since it is located in the immediate vicinity of the touch screen with which a user is brought to interact.
  • the interaction interface comprises a frame, a part of which is located at the rear of said support plate has a free surface inclined with respect to the front face of said touch screen, the printed circuit support plate bearing on said free surface and being fixed thereto by fixing means. The mounting and fixing of the printed circuit support plate inclined relative to the front face of the touch screen is thus facilitated.
  • the interaction interface comprises a protection plate, transparent in said infrared radiation range, separating the emitter from the outside of said interaction interface, the printed circuit support plate is positioned so that one of its edges is located near said protection plate, and the transmitter is mounted on said printed circuit support plate, near said edge, so that the transmitter is located near said protection plate.
  • Such a protection plate improves the appearance of the device and protects in particular the electronic components that the device comprises.
  • the arrangement described above also makes it possible to position the transmitter, which is then located inside the interaction interface, as close as possible to this protection plate.
  • Such a protection plate may, in particular to promote a homogeneous appearance of the front face of the interaction interface, be substantially parallel to the front face of the touch screen.
  • the preceding provisions then allow light rays emitted by the emitter emerging from said protection plate with a very inclined direction relative to a direction perpendicular to the front face of the touch screen, which is very interesting, as it has been explained above.
  • the transmitter comprises a light-emitting diode; the low cost, high efficiency, reliability and lifetime of such a transmitter are particularly advantageous;
  • the receiver may comprise a phototransistor; the internal gain of the photo-current obtained with such a component makes it possible to simplify the electronic circuit for detecting such a detector by avoiding a pre-amplification stage of the signals received by the receiver; and
  • the interaction interface comprises at least two transmitters adapted to emit radiation in said infrared range, the front face of the touch screen has a rectangle-shaped outline, and one of said transmitters is located along a first edge of said rectangle and the other of said emitters is located along an edge of said rectangle opposite the first edge.
  • FIG. 1 diagrammatically represents the operating principle of the proximity detector of an interaction interface according to the invention
  • FIGS. 2 and 3 schematically represent two embodiments of the interaction interface of FIG. 1, front views,
  • FIG. 4 is a diagrammatic sectional view of the interaction interface of FIG. 2, and FIG. 5 is a detailed view of the zone V of FIG. 4.
  • FIG. 1 diagrammatically shows components of a proximity detector 15 of an interaction interface, making it possible to illustrate the principle of operation of this proximity detector 15.
  • the proximity detector 15 comprises at least one emitter 10 which radiates in an infrared range, such as for example a light-emitting diode.
  • the operation of the transmitter is provided by a control module January 1 comprising in particular a power supply delivering to the transmitter 10 a suitable electric current.
  • the radiation emitted by the transmitter 10 is directed towards the outside of the proximity detector 15 of the interaction interface.
  • a hand 14 of a user When a hand 14 of a user (or when an object) is close to the proximity detector 15, it reflects a part of the radiation that the emitter has emitted. In particular, part of the radiation emitted by the transmitter 10 is thus reflected towards a receiver 12, such as for example a photodiode.
  • the power of the infrared radiation detected by the receiver 12 is thus all the greater that the hand of a user is close to the proximity detector 15 (for a given hand orientation), which, if combined with other criteria, to detect the proximity of the hand 14 of a user.
  • a detection module 13 ensures the operation of the receiver 12, in particular by supplying it with appropriate electrical power, and analyzes the signals that the receiver 12 delivers in order to detect an object, or the hand of a user.
  • FIGS. 2 and 3 diagrammatically show two alternative embodiments of an interaction interface 200; 300 according to the invention, front view, such for example that sees a user.
  • the interaction interface 200; 300 comprises a touch screen 201, whose front face 218 has a contour in the form of a rectangle.
  • First emitters 205, 206, 208 and 209 radiating in an infrared range are distributed along a first edge 202 of said rectangle.
  • a first receiver 207, adapted to detect radiation in said infrared range, is also located along this first edge 202.
  • the first emitters 205, 206, 208 and 209 most often have a small emission area relative to the surface of the touch screen 201, in particular when each of these emitters consists of a light-emitting diode. It is therefore advantageous to have several transmitters, distributed along an edge of the touch screen 201, so that all the light beams emitted by these first transmitters best cover the area located vis-à- screw 218 of the front panel 201, so that an object (or that the hand of a user) can actually be detected in this area. This arrangement also improves the homogeneity of the illumination, within the illuminated area, and thus the detection efficiency.
  • Second transmitters 210, 21 1, 213 and 214 which radiate in said infrared range, as well as a second receiver 212 adapted to detect radiation in said infrared range, are furthermore situated opposite the first transmitters 205, 206, 208, 209 and the first receiver 207 relative to the touch screen 201 (along a second edge 203 of the rectangle, which is opposite its first edge 202).
  • the second emitters 210, 21 1, 213 and 214 are distributed along the second edge 203, substantially comparable to the manner in which the first emitters 205, 206, 207 and 208 are distributed along the first edge 202, so that there again, optimize the extent of the illuminated area vis-à-vis the front of the touch screen 201.
  • the scope is optimized.
  • the area of the space 440 (visible in Figure 4) which is illuminated vis-à-vis the front face of the touch screen 201, and the homogeneity of the lighting within this area. The extent of the area of the space in which the hand of a user can be detected is thus increased.
  • the front face 218 of the touch screen 201 is embedded in a frame 217, for example plastic.
  • the frame 217 protects the interface components located on the periphery of the touch screen, in particular each transmitter 205, 206, 208, 209, 210, 21 1, 213, 214 and each receiver 207, 212, and separates them. from outside the interaction interface 200; 300.
  • a first protection plate 216 is inserted into an opening provided for this purpose in the frame 217.
  • the first protection plate 216 here rectangular in shape, is transparent at least partly in the infrared radiation range in which the emitters mentioned above. It covers the first transmitters 205, 206, 208 and 209 and the receiver 207, and separates them from outside the interaction interface.
  • the frame 217 is transparent in said infrared radiation range, and that the frame 217 then directly fulfills the function of a frame as well as the function of a plate of protection as presented above.
  • receivers 207, 212 and transmitters 205, 206, 208, 209, 210, 21 1, 213, 214 it is possible for all of the above-mentioned receivers 207, 212 and transmitters 205, 206, 208, 209, 210, 21 1, 213, 214 to be covered by a single plate. protection.
  • the interaction interface 300 of FIG. 3 differs from that shown in FIG. 2 in that it further comprises third transmitters 301, 302, 303 which radiate in said infrared range, as well as a third receiver 304 adapted detecting radiation in said infrared range, distributed along a third edge 204 of the rectangular contour of the touch screen 201.
  • the third emitters 301, 302 and 303, and the third receiver 304 are covered with a third protection plate 305, similar to the first protection plate 216 described above, and inserted into an opening provided for this purpose in the frame. 217.
  • the three receivers 207, 212 and 304 are distributed here on three distinct sides 202, 203 and 204 of the rectangular contour of the touch screen 201.
  • the touch screen 201 comprises display means 41 1, such as for example a liquid crystal display or a light-emitting diode screen, and a touch-sensitive panel 401 superimposed on the display means 41. 1, in front of them.
  • display means 41 such as for example a liquid crystal display or a light-emitting diode screen
  • touch-sensitive panel 401 superimposed on the display means 41. 1, in front of them.
  • the touch screen 401 is protected by a plate 402 which covers it.
  • the plate 402 is transparent at least in part in the visible radiation range. This is for example a glass plate.
  • the plate 402 has, on the outside side of the interaction interface, an accessible face 218 which constitutes the front face 218 of the touch screen 201.
  • the touch screen 401 makes it possible, for example by using capacitive effects, or resistive effects, to detect the presence of at least one finger of a user on the front face 218, and to determine the position pointed by this finger. .
  • At least one of the emitters 205, 206, 208, 209, 210, 21 1, 213, 214, 301, 302, 303 is fixedly mounted on a printed circuit support plate 406, and that it is inclined relative to the front face 218 of the touch screen 201, so that the transmitter 214 has a mean direction of emission Ai directed towards the space located in front of said touch screen 201.
  • the transmitter 214 may for example be fixed on the printed circuit support plate 406 by two welds for electrically connecting the control module 1 1 described above.
  • the arrangement of the transmitter 214 is shown here in FIG. 5, but that the arrangement of the other emitters 205, 206, 208, 209, 210, 21 1, 213, 301, 302, 303 and Receivers 207, 212, 304 is substantially the same.
  • the light rays emitted by the transmitter 214 in the said infrared radiation range leave the interaction interface while passing through the second protection plate 215.
  • the edge 412 is the one which is the closest to the protection plate 215.
  • the emitter 214 is advantageously positioned near this edge 412, so as to be positioned closest to the second protection plate 215. This proximity allows light rays, emitted by the transmitter 214, to pass through said second protection plate 215 even if their direction is very inclined relative to a direction perpendicular to the second protective plate 215 (as for example the case of the light beam 420), and even if the protection plate 215 has limited dimensions, as mentioned above.
  • the printed circuit support plate 406 can have a rectangle-shaped contour, and for several of the emitters 210, 21 1, 213, 214 to be optional, that the receiver 212 , are fixed on this same support plate, near the edge 412.
  • the beam of light rays emitted by the emitter 214, which emerges from the second protection plate 215, is approximately cone-shaped, the apex of which is substantially located at the emitter 214.
  • the axis of this cone corresponds to the average transmission direction Ai of the transmitter 214, and is directed from the transmitter 214 to the space at the front of the touch screen 201, as mentioned above. It is substantially orthogonal to the plane of the printed circuit support plate 406.
  • the radius 420 is the one that shaves the front face 218 of the touch screen the most, and the radius 421 is the one that deviates the most from it.
  • the zone illuminated by this beam of light rays is thus delimited, on the side located near the front face 218 of the touch screen, by the radius 420, and, on the opposite side, by the light beam 421.
  • the light ray 420 defining this illuminated area 440 must be the as much as possible with respect to the front face 218 of the touch screen. It must thus form with the front face 218 an angle ⁇ as small as possible (see Figure 4).
  • FIG. 4 also shows the transmitter 209, which is reminded that it is located along the first edge 202 of the touch screen (the one opposite the second edge 203 along which the transmitter 214 is located) .
  • the transmitter 214 it is fixed on a printed circuit support plate 450 inclined with respect to the front face 218 of the touch screen, whereby it has a mean direction of emission directed towards the space located at the front of touch screen 201.
  • the touch screen 201 has an outer shape substantially symmetrical with respect to a plane P perpendicular to its front face 218, and parallel to the first edge 202 of the front face 218.
  • the inclination of the printed circuit support plate 405 may for example be substantially symmetrical with respect to this plane P, that of the support plate 406.
  • the beam of light rays emitted by the emitter 209 is then substantially symmetrical, with respect to this plane P, of the beam of light rays emitted by the emitter 214.
  • the radius 430 is the one that shaves the front face 218 of the touch screen the most, and the radius 431 is the one that deviates the most from it.
  • the zone 440 of the space which is illuminated by the emitters 205, 206, 208, 209, 210, 21 1, 213, 214 (and 301, 302, 303 in the case of the interaction interface 300) with an illumination sufficient to allow the detection of the hand of a user (or an object) is delimited in particular by the light rays 420, 430, 421 and 431 mentioned above, as can be seen in FIG. 4 It can for example be substantially symmetrical with respect to the plane P mentioned above.
  • the illuminated zone 440 may extend, facing the touch screen 201 to a distance from the front face 218 of the touch screen up to 50 centimeters, thus allowing detection of the hand of a user, or an object, to such a distance.
  • the interaction interface 200 or 300 furthermore comprises a chassis 407 to which the display means 41 1 can be attached.
  • the chassis 407 may have a free surface 409, inclined with respect to the front face 218 of the touch screen, on which the printed circuit support plate 406 is based.
  • the free surface 409 is located at the end of a portion of the frame 407 which forms a column 408, the column 408 extending from the bottom of the frame 407, in a direction substantially perpendicular to the latter, up to the free surface 409.
  • the printed circuit support plate 406 is fixed to the frame 407 at the free surface 409 by fastening means 410.
  • the fastening means 410 comprise, for example, a screw whose threaded rod is engaged in a tapped hole. in the frame 407, and extends along an axis A2 substantially perpendicular to the free surface 409.
  • the printed circuit support plate 406 is then pressed on the free surface 409 by the head of the screw 410, and thus held fixedly on said free surface 409.
  • the interaction interface 200 or 300 may comprise, for the attachment of the transmitters 205, 206, 208, 209, 210, 21 1, 213, 301, 302, 303 and the receivers 207, 212, 204, other plates printed circuit boards attached to the frame 407 in a manner comparable to the printed circuit board support plate 406.

Abstract

The invention concerns an interaction interface comprising: - a touch screen (201) having a substantially planar front face (218), and - a proximity detector comprising at least one transmitter (214) that radiates in an infrared range and that is located on the periphery of said touch screen, and at least one receiver suitable for detecting radiation in said infrared range. According to the invention, said transmitter is fixedly mounted on a support plate of a printed circuit (406) that is tilted relative to the front face of said touch screen in such a way that said transmitter has an average transmission direction (A) directed towards the space located in front of said touch screen.

Description

INTERFACE D'INTERACTION COMPRENANT UN ECRAN TACTILE ET UN INTERACTION INTERFACE COMPRISING A TOUCH SCREEN AND A
DETECTEUR DE PROXIMITE PROXIMITY SENSOR
DOMAINE TECHNIQUE AUQUEL SE RAPPORTE L'INVENTION La présente invention concerne de manière générale le domaine des interfaces d'interaction permettant à un utilisateur d'interagir avec un dispositif électronique. TECHNICAL FIELD TO WHICH THE INVENTION RELATES The present invention generally relates to the field of interaction interfaces allowing a user to interact with an electronic device.
Elle concerne plus particulièrement une interface d'interaction comprenant :  It relates more particularly to an interaction interface comprising:
- un écran tactile présentant une face avant (tournée vers l'utilisateur) sensiblement plane, et  a touch screen having a front face (turned towards the user) substantially flat, and
- un détecteur de proximité comportant au moins un émetteur qui rayonne dans un domaine infrarouge et qui est situé sur le pourtour dudit écran tactile, et au moins un récepteur adapté à détecter un rayonnement dans ledit domaine infrarouge.  a proximity detector comprising at least one emitter radiating in an infrared range and located on the periphery of said touch screen, and at least one receiver adapted to detect radiation in said infrared range.
Elle s'applique de manière avantageuse lorsqu'un utilisateur est amené à interagir avec ladite interface tout en réalisant d'autres actions (conduite d'un véhicule,...).  It applies advantageously when a user is brought to interact with said interface while performing other actions (driving a vehicle, ...).
En particulier, elle s'applique de manière particulièrement intéressante dans un véhicule automobile.  In particular, it applies particularly interestingly in a motor vehicle.
ARRIERE-PLAN TECHNOLOGIQUE  BACKGROUND
Les interfaces d'interaction comprenant un écran tactile sont de plus en plus répandues dans l'environnement quotidien. De telles interfaces équipent par exemple un nombre grandissant de téléphones portables, tablettes à écran tactile, distributeurs de titres de transport, machines-outils, ou encore véhicules automobiles.  Interaction interfaces including a touch screen are becoming more common in the everyday environment. Such interfaces equip for example a growing number of mobile phones, touch screen tablets, ticket vending machines, machine tools, or motor vehicles.
Dans un véhicule automobile, par exemple, une telle interface peut par exemple servir à commander un poste de radio. Elle peut aussi servir à afficher des informations de géolocalisation.  In a motor vehicle, for example, such an interface can for example be used to control a radio. It can also be used to display geolocation information.
II est intéressant de munir une telle interface d'interaction, comprenant un écran tactile, d'un détecteur de proximité permettant de détecter qu'une main d'un utilisateur s'approche de l'interface, et pouvant aussi, par exemple, déterminer une position de cette main face à l'écran tactile.  It is advantageous to provide such an interaction interface, comprising a touch screen, a proximity sensor for detecting that a hand of a user approaches the interface, and may also, for example, determine a position of this hand facing the touch screen.
En détectant ainsi que la main d'un utilisateur est à proximité de l'interface d'interaction, cette dernière peut optimiser le contenu des informations affichées, de manière à les adapter au comportement de l'utilisateur avant même qu'il ne touche l'écran tactile. By detecting that the hand of a user is close to the interaction interface, the latter can optimize the content of the information displayed, so as to adapt to the behavior of the user before he even touches the touch screen.
Par exemple, en cas d'approche, si l'interface était dans un état de veille, elle peut basculer de cet état de veille à un état de fonctionnement standard. Ou encore, si une approche vers une zone particulière de l'écran est détectée, cette zone peut alors être affichée de manière agrandie, par exemple en plein écran.  For example, if approaching, if the interface was in a standby state, it can switch from this standby state to a standard operating state. Or, if an approach to a particular area of the screen is detected, this area can then be displayed in an enlarged manner, for example in full screen.
De telles dispositions, rendues possibles par la collaboration d'un détecteur de proximité avec l'écran tactile, sont particulièrement intéressantes lorsque l'utilisateur de l'interface d'interaction est amené à interagir avec celle-ci tout en réalisant d'autres actions, par exemple tout en conduisant un véhicule automobile, ou tout en pilotant une machine-outil.  Such arrangements, made possible by the collaboration of a proximity sensor with the touch screen, are particularly interesting when the user of the interaction interface is brought to interact with it while performing other actions. for example while driving a motor vehicle, or while driving a machine tool.
Ces dispositions permettent en effet de réduire le temps d'interaction de l'utilisateur avec l'interface, par exemple en sélectionnant et affichant de manière agrandie une zone de l'écran, avant même que l'utilisateur ne l'ait touchée. Le temps ainsi gagné permet alors à l'utilisateur de consacrer une part plus importante de son attention à d'autres actions (comme la conduite d'un véhicule automobile).  These provisions make it possible to reduce the interaction time of the user with the interface, for example by selecting and displaying an enlarged area of the screen, even before the user has touched. The time thus gained allows the user to devote a greater part of his attention to other actions (such as driving a motor vehicle).
Concrètement, il est connu de réaliser un tel détecteur de proximité au moyen d'un émetteur qui rayonne dans un domaine infrarouge et qui est situé sur le pourtour dudit écran tactile, et d'un récepteur adapté à détecter un rayonnement dans ledit domaine infrarouge. Le rayonnement ainsi émis est dirigé vers l'extérieur de l'interface d'interaction. Si une main d'un utilisateur, par exemple, est face au détecteur, à proximité de ce dernier, elle réfléchit une partie du rayonnement émis vers le récepteur, qui détecte ainsi sa présence.  Specifically, it is known to make such a proximity detector by means of a transmitter which radiates in an infrared range and which is located on the periphery of said touch screen, and a receiver adapted to detect radiation in said infrared range. The radiation thus emitted is directed towards the outside of the interaction interface. If a hand of a user, for example, is facing the detector, near the latter, it reflects a portion of the radiation emitted to the receiver, which thus detects its presence.
De manière générale, il est souhaitable que l'émetteur éclaire une zone de l'espace située à l'avant de l'écran tactile, en vis-à-vis de ce dernier, puisque c'est dans cette zone que l'on souhaite pouvoir détecter la main d'un utilisateur de l'interface.  In general, it is desirable for the emitter to illuminate an area of the space located at the front of the touch screen, vis-à-vis the latter, since it is in this area that one wants to be able to detect the hand of a user of the interface.
II est connu, pour un tel détecteur de proximité, de monter fixement l'émetteur sur une plaque-support de circuit imprimé qui est sensiblement parallèle à la face avant de l'écran tactile, puis de munir cet émetteur d'un composant optique qui dévie la direction moyenne du faisceau lumineux produit, à la manière d'un prisme. Dans un tel arrangement, la direction moyenne du faisceau émis initialement par l'émetteur, sans le composant optique, est sensiblement perpendiculaire à la plaque-support de circuit imprimé sur laquelle il est fixé. Cette direction est donc sensiblement perpendiculaire à la face avant de l'écran tactile. Le composant optique permet alors de dévier ce rayon lumineux vers l'avant de l'écran tactile. Malheureusement, la déviation du faisceau lumineux, introduite par le composant optique mentionné ci-dessus, n'est pas suffisante pour réorienter ce faisceau lumineux pour qu'il rase l'écran tactile. It is known, for such a proximity sensor, to fix the emitter on a printed circuit support plate which is substantially parallel to the front face of the touch screen, and then to provide this emitter with an optical component which deviates the average direction of the light beam produced, in the manner of a prism. In such an arrangement, the average direction of the beam initially emitted by the emitter, without the optical component, is substantially perpendicular to the printed circuit support plate to which it is attached. This direction is therefore substantially perpendicular to the front face of the touch screen. The optical component then makes it possible to deviate this light beam towards the front of the touch screen. Unfortunately, the deflection of the light beam, introduced by the optical component mentioned above, is not sufficient to reorient the light beam to shave the touch screen.
En particulier, dans un tel arrangement, la zone située au dessus de la face avant de l'écran tactile, à proximité immédiate de celle-ci, n'est que très faiblement éclairée par l'émetteur, et un tel détecteur de proximité ne peut donc y détecter la main d'un utilisateur.  In particular, in such an arrangement, the area located above the front face of the touch screen, in the immediate vicinity of it, is only very dimly lit by the transmitter, and such a proximity detector does not can detect the hand of a user.
Enfin, l'utilisation d'un composant supplémentaire tel que le composant optique s'avère nécessairement onéreuse.  Finally, the use of an additional component such as the optical component is necessarily expensive.
OBJET DE L'INVENTION  OBJECT OF THE INVENTION
Afin de remédier à l'inconvénient précité de l'état de la technique, la présente invention propose une interface d'interaction telle que définie en préambule, dans laquelle il est prévu que ledit émetteur est monté fixement sur une plaque-support de circuit imprimé qui est inclinée par rapport à la face avant dudit écran tactile de telle manière que ledit émetteur présente une direction moyenne d'émission dirigée vers l'espace situé à l'avant dudit écran tactile.  In order to overcome the above-mentioned drawback of the state of the art, the present invention proposes an interaction interface as defined in the preamble, in which it is provided that said emitter is fixedly mounted on a printed circuit support plate. which is inclined with respect to the front face of said touch screen such that said emitter has an average direction of emission directed towards the space situated in front of said touch screen.
La direction moyenne du faisceau lumineux émis par le détecteur de proximité d'une telle interface est ainsi inclinée par rapport à une direction perpendiculaire à la face avant de l'écran tactile, et dirigé vers celui-ci. Ainsi, bien que l'émetteur soit positionné sur le pourtour de l'écran tactile, il éclaire efficacement une zone de l'espace située à l'avant de l'écran tactile, en vis-à-vis de ce dernier.  The average direction of the light beam emitted by the proximity sensor of such an interface is thus inclined relative to a direction perpendicular to the front face of the touch screen, and directed towards it. Thus, although the transmitter is positioned on the periphery of the touch screen, it effectively illuminates an area of the space at the front of the touch screen, vis-à-vis the latter.
En particulier, une zone située en vis-à-vis de la face avant de l'écran tactile, à proximité immédiate de celle-ci, peut être éclairée efficacement par l'émetteur, ce qui permet d'y détecter la main d'un utilisateur, comme expliqué ci- dessus. Pouvoir détecter la main d'un utilisateur dans une telle zone est particulièrement intéressant, puisqu'elle est située à proximité immédiate de l'écran tactile avec lequel un utilisateur est amené à interagir.  In particular, an area located vis-à-vis the front face of the touch screen, in the immediate vicinity thereof, can be effectively illuminated by the transmitter, which allows to detect the hand of a user, as explained above. Being able to detect the hand of a user in such a zone is particularly interesting, since it is located in the immediate vicinity of the touch screen with which a user is brought to interact.
En outre, un tel arrangement ne nécessite pas d'utiliser un composant optique supplémentaire pour dévier le faisceau lumineux émis par l'émetteur, ce qui est avantageux en termes de coût et de fiabilité de l'interface. In addition, such an arrangement does not require the use of a component additional optics to deflect the light beam emitted by the transmitter, which is advantageous in terms of cost and reliability of the interface.
L'invention prévoit, dans un mode préféré de réalisation, que l'interface d'interaction comprend un châssis, dont une partie située à l'arrière de ladite plaque support présente une surface libre inclinée par rapport à la face avant dudit écran tactile, la plaque-support de circuit imprimé prenant appui sur ladite surface libre et étant fixée à cette dernière par des moyens de fixation. Le montage et la fixation de la plaque-support de circuit imprimé inclinée par rapport à la face avant de l'écran tactile est ainsi facilité.  The invention provides, in a preferred embodiment, that the interaction interface comprises a frame, a part of which is located at the rear of said support plate has a free surface inclined with respect to the front face of said touch screen, the printed circuit support plate bearing on said free surface and being fixed thereto by fixing means. The mounting and fixing of the printed circuit support plate inclined relative to the front face of the touch screen is thus facilitated.
Préférentiellement, l'interface d'interaction comprend une plaque de protection, transparente dans ledit domaine de rayonnement infrarouge, séparant l'émetteur de l'extérieur de ladite interface d'interaction, la plaque-support de circuit imprimé est positionnée de sorte qu'un de ses bords est situé à proximité de ladite plaque de protection, et l'émetteur est monté sur ladite plaque-support de circuit imprimé, à proximité dudit bord, de sorte que l'émetteur est situé à proximité de ladite plaque de protection.  Preferably, the interaction interface comprises a protection plate, transparent in said infrared radiation range, separating the emitter from the outside of said interaction interface, the printed circuit support plate is positioned so that one of its edges is located near said protection plate, and the transmitter is mounted on said printed circuit support plate, near said edge, so that the transmitter is located near said protection plate.
Une telle plaque de protection améliore l'aspect du dispositif et protège notamment les composants électroniques que le dispositif comprend. L'arrangement décrit ci-dessus permet par ailleurs de positionner l'émetteur, qui est alors situé à l'intérieur de l'interface d'interaction, au plus près de cette plaque de protection.  Such a protection plate improves the appearance of the device and protects in particular the electronic components that the device comprises. The arrangement described above also makes it possible to position the transmitter, which is then located inside the interaction interface, as close as possible to this protection plate.
Grâce à cette proximité, des rayons lumineux émis par l'émetteur peuvent traverser ladite plaque de protection même si leur direction est très inclinée par rapport une direction perpendiculaire à la plaque de protection, et même si la zone de ladite plaque de protection qui permet le passage de ces rayons lumineux du domaine infrarouge a des dimensions limitées.  Thanks to this proximity, light rays emitted by the transmitter can pass through said protection plate even if their direction is very inclined relative to a direction perpendicular to the protection plate, and even if the zone of said protection plate which allows the passage of these light rays from the infrared range has limited dimensions.
Une telle plaque de protection peut, notamment pour favoriser un aspect homogène de la façade avant de l'interface d'interaction, être sensiblement parallèle à la face avant de l'écran tactile. Les dispositions précédentes permettent alors que des rayons lumineux émis par l'émetteur émergent de ladite plaque de protection avec une direction très inclinée par rapport à une direction perpendiculaire à la face avant de l'écran tactile, ce qui est très intéressant, comme cela a été expliqué ci-dessus.  Such a protection plate may, in particular to promote a homogeneous appearance of the front face of the interaction interface, be substantially parallel to the front face of the touch screen. The preceding provisions then allow light rays emitted by the emitter emerging from said protection plate with a very inclined direction relative to a direction perpendicular to the front face of the touch screen, which is very interesting, as it has been explained above.
D'autres caractéristiques non limitatives et avantageuses d'une interface d'interaction conforme à l'invention sont les suivantes : Other non-limiting and advantageous characteristics of an interface interaction according to the invention are as follows:
- l'émetteur comprend une diode électroluminescente ; le faible coût, la grande efficacité, fiabilité et durée de vie d'un tel émetteur sont particulièrement avantageuses ;  the transmitter comprises a light-emitting diode; the low cost, high efficiency, reliability and lifetime of such a transmitter are particularly advantageous;
- le récepteur comprend une photodiode ; le faible coût, la grande efficacité, fiabilité et durée de vie d'un tel récepteur sont également très intéressantes ;  the receiver comprises a photodiode; the low cost, high efficiency, reliability and lifetime of such a receiver are also very interesting;
- selon une autre possibilité, le récepteur peut comprendre un phototransistor ; le gain interne du photo-courant obtenu avec un tel composant permet de simplifier le circuit électronique de détection d'un tel détecteur en s'affranchissant d'un étage de pré-amplification des signaux reçus par le récepteur ; et  according to another possibility, the receiver may comprise a phototransistor; the internal gain of the photo-current obtained with such a component makes it possible to simplify the electronic circuit for detecting such a detector by avoiding a pre-amplification stage of the signals received by the receiver; and
- l'interface d'interaction comprend au moins deux émetteurs adaptés à émettre un rayonnement dans ledit domaine infrarouge, la face avant de l'écran tactile présente un contour en forme de rectangle, et l'un desdits émetteurs est situé le long d'un premier bord dudit rectangle et l'autre desdits émetteurs est situé le long d'un bord dudit rectangle opposé au premier bord.  - The interaction interface comprises at least two transmitters adapted to emit radiation in said infrared range, the front face of the touch screen has a rectangle-shaped outline, and one of said transmitters is located along a first edge of said rectangle and the other of said emitters is located along an edge of said rectangle opposite the first edge.
En éclairant ainsi la zone située en avant de l'écran tactile depuis au moins deux bords opposés de cet écran (au lieu de l'éclairer depuis un bord de l'écran seulement), une zone plus grande est éclairée, et de manière plus homogène. La zone de l'espace, située en vis-à-vis de l'écran tactile, dans laquelle un objet ou la main d'un utilisateur peuvent être détectés par le détecteur de proximité est ainsi plus étendue, et cette détection est plus efficace.  By thus illuminating the area in front of the touch screen from at least two opposite edges of this screen (instead of illuminating it from one edge of the screen only), a larger area is illuminated, and more homogeneous. The area of the space, located opposite the touch screen, in which an object or the hand of a user can be detected by the proximity detector is thus more extensive, and this detection is more effective .
DESCRIPTION DÉTAILLÉE D'UN EXEMPLE DE RÉALISATION La description qui va suivre en regard des dessins annexés, donnés à titre d'exemples non limitatifs, fera bien comprendre en quoi consiste l'invention et comment elle peut être réalisée.  DETAILED DESCRIPTION OF AN EXEMPLARY EMBODIMENT The following description with reference to the accompanying drawings, given by way of non-limiting examples, will make it clear what the invention consists of and how it can be implemented.
Sur les dessins annexés :  In the accompanying drawings:
- la figure 1 représente schématiquement le principe de fonctionnement du détecteur de proximité d'une interface d'interaction conforme à l'invention,  FIG. 1 diagrammatically represents the operating principle of the proximity detector of an interaction interface according to the invention,
- les figures 2 et 3 représentent schématiquement deux variantes de réalisation de l'interface d'interaction de la figure 1 , vues de face,  FIGS. 2 and 3 schematically represent two embodiments of the interaction interface of FIG. 1, front views,
- la figure 4 est une vue schématique en coupe de l'interface d'interaction de la figure 2, et - la figure 5 est une vue de détail de la zone V de la figure 4. FIG. 4 is a diagrammatic sectional view of the interaction interface of FIG. 2, and FIG. 5 is a detailed view of the zone V of FIG. 4.
Dans toutes les figures, les éléments communs portent les mêmes numéros de référence.  In all the figures, the common elements bear the same reference numbers.
Sur la figure 1 , on a représenté schématiquement des composants d'un détecteur de proximité 15 d'une interface d'interaction, permettant d'illustrer le principe de fonctionnement de ce détecteur de proximité 15.  FIG. 1 diagrammatically shows components of a proximity detector 15 of an interaction interface, making it possible to illustrate the principle of operation of this proximity detector 15.
Le détecteur de proximité 15 comprend au moins un émetteur 10 qui rayonne dans un domaine infrarouge, tel par exemple qu'une diode électroluminescente. Le fonctionnement de l'émetteur est assuré par un module de commande 1 1 comprenant notamment une alimentation électrique délivrant à l'émetteur 10 un courant électrique adapté.  The proximity detector 15 comprises at least one emitter 10 which radiates in an infrared range, such as for example a light-emitting diode. The operation of the transmitter is provided by a control module January 1 comprising in particular a power supply delivering to the transmitter 10 a suitable electric current.
Le rayonnement émis par l'émetteur 10 est dirigé vers l'extérieur du détecteur de proximité 15 de l'interface d'interaction.  The radiation emitted by the transmitter 10 is directed towards the outside of the proximity detector 15 of the interaction interface.
Lorsqu'une main 14 d'un utilisateur (ou lorsqu'un objet) est proche du détecteur de proximité 15, elle réfléchit une partie du rayonnement que l'émetteur a émis. En particulier, une partie du rayonnement émis par l'émetteur 10 est ainsi réfléchie vers un récepteur 12, tel par exemple qu'une photodiode.  When a hand 14 of a user (or when an object) is close to the proximity detector 15, it reflects a part of the radiation that the emitter has emitted. In particular, part of the radiation emitted by the transmitter 10 is thus reflected towards a receiver 12, such as for example a photodiode.
Plus la main 14 d'un utilisateur est proche du détecteur de proximité 15, et plus elle réfléchit vers ce dernier une part grande du rayonnement que l'émetteur a émis. La puissance du rayonnement infrarouge détectée par le récepteur 12 est ainsi d'autant plus grande que la main d'un utilisateur est proche du détecteur de proximité 15 (pour une orientation de la main donnée), ce qui, éventuellement combiné à d'autres critères, permet de détecter la proximité de la main 14 d'un utilisateur.  The closer a user's hand 14 is to the proximity detector 15, the more it reflects to the latter a large part of the radiation that the emitter has emitted. The power of the infrared radiation detected by the receiver 12 is thus all the greater that the hand of a user is close to the proximity detector 15 (for a given hand orientation), which, if combined with other criteria, to detect the proximity of the hand 14 of a user.
Un module de détection 13 assure le fonctionnement du récepteur 12, notamment en l'alimentant électriquement de manière appropriée, et analyse les signaux que le récepteur 12 délivre afin de détecter un objet, ou la main d'un utilisateur.  A detection module 13 ensures the operation of the receiver 12, in particular by supplying it with appropriate electrical power, and analyzes the signals that the receiver 12 delivers in order to detect an object, or the hand of a user.
Sur les figures 2 et 3, on a représenté schématiquement deux variantes de réalisation d'une interface d'interaction 200 ; 300 selon l'invention, vue de face, telle par exemple que la voit un utilisateur.  FIGS. 2 and 3 diagrammatically show two alternative embodiments of an interaction interface 200; 300 according to the invention, front view, such for example that sees a user.
Dans ces deux variantes, l'interface d'interaction 200 ; 300, comprend un écran tactile 201 , dont la face avant 218 présente un contour en forme de rectangle. Des premiers émetteurs 205, 206, 208 et 209 qui rayonnent dans un domaine infrarouge, sont répartis le long d'un premier bord 202 dudit rectangle. Un premier récepteur 207, adapté à détecter un rayonnement dans ledit domaine infrarouge, est également situé le long de ce premier bord 202. In these two variants, the interaction interface 200; 300, comprises a touch screen 201, whose front face 218 has a contour in the form of a rectangle. First emitters 205, 206, 208 and 209 radiating in an infrared range are distributed along a first edge 202 of said rectangle. A first receiver 207, adapted to detect radiation in said infrared range, is also located along this first edge 202.
Les premiers émetteurs 205, 206, 208 et 209 présentent le plus souvent une surface d'émission petite par rapport à la surface de l'écran tactile 201 , en particulier lorsque chacun de ces émetteurs est constitué d'une diode électroluminescente. Il est alors intéressant de disposer plusieurs émetteurs, répartis le long d'un bord de l'écran tactile 201 , de manière à ce que l'ensemble des faisceaux lumineux émis par ces premiers émetteurs couvre au mieux la zone située en vis-à-vis de la face avant 218 de l'écran tactile 201 , de sorte qu'un objet (ou que la main d'un utilisateur) puisse effectivement être détecté dans cette zone. Cette disposition améliore en outre l'homogénéité de l'éclairement, au sein de la zone éclairée, et donc l'efficacité de détection.  The first emitters 205, 206, 208 and 209 most often have a small emission area relative to the surface of the touch screen 201, in particular when each of these emitters consists of a light-emitting diode. It is therefore advantageous to have several transmitters, distributed along an edge of the touch screen 201, so that all the light beams emitted by these first transmitters best cover the area located vis-à- screw 218 of the front panel 201, so that an object (or that the hand of a user) can actually be detected in this area. This arrangement also improves the homogeneity of the illumination, within the illuminated area, and thus the detection efficiency.
Des seconds émetteurs 210, 21 1 , 213 et 214 qui rayonnent dans ledit domaine infrarouge, ainsi qu'un second récepteur 212 adapté à détecter un rayonnement dans ledit domaine infrarouge, sont par ailleurs situés à l'opposé des premiers émetteurs 205, 206, 208, 209 et du premier récepteur 207 par rapport à l'écran tactile 201 (le long d'un second bord 203 du rectangle, qui est opposé à son premier bord 202).  Second transmitters 210, 21 1, 213 and 214 which radiate in said infrared range, as well as a second receiver 212 adapted to detect radiation in said infrared range, are furthermore situated opposite the first transmitters 205, 206, 208, 209 and the first receiver 207 relative to the touch screen 201 (along a second edge 203 of the rectangle, which is opposite its first edge 202).
Les seconds émetteurs 210, 21 1 , 213 et 214 sont répartis le long du second bord 203, de manière sensiblement comparable à la manière dont les premiers émetteurs 205, 206, 207 et 208 sont répartis le long du premier bord 202, afin, là encore, d'optimiser l'étendue de la zone éclairée en vis-à-vis de la face avant de l'écran tactile 201 .  The second emitters 210, 21 1, 213 and 214 are distributed along the second edge 203, substantially comparable to the manner in which the first emitters 205, 206, 207 and 208 are distributed along the first edge 202, so that there again, optimize the extent of the illuminated area vis-à-vis the front of the touch screen 201.
Par ailleurs, en éclairant ainsi la zone située en avant de l'écran tactile 201 depuis deux bords opposés 202 et 203 de cet écran, au lieu par exemple de l'éclairer depuis un bord de l'écran seulement, on optimise l'étendue de la zone de l'espace 440 (visible sur la figure 4) qui est éclairée en vis-à-vis de la face avant de l'écran tactile 201 , ainsi que l'homogénéité de l'éclairage au sein de cette zone. L'étendue de la zone de l'espace dans laquelle la main d'un utilisateur peut être détectée s'en trouve ainsi augmentée.  Moreover, thus illuminating the area in front of the touch screen 201 from two opposite edges 202 and 203 of this screen, instead of for example to illuminate from an edge of the screen only, the scope is optimized. the area of the space 440 (visible in Figure 4) which is illuminated vis-à-vis the front face of the touch screen 201, and the homogeneity of the lighting within this area. The extent of the area of the space in which the hand of a user can be detected is thus increased.
Dans les exemples non limitatifs décrits ci-dessous en référence aux figures 2 et 3, la face avant 218 de l'écran tactile 201 est enchâssée dans un cadre 217, par exemple en matière plastique. Le cadre 217 protège les composants de l'interface situés sur le pourtour de l'écran tactile, en particulier chaque émetteur 205, 206, 208, 209, 210, 21 1 , 213, 214 et chaque récepteur 207, 212, et les sépare de l'extérieur de l'interface d'interaction 200 ; 300. In the nonlimiting examples described below with reference to FIGS. 2 and 3, the front face 218 of the touch screen 201 is embedded in a frame 217, for example plastic. The frame 217 protects the interface components located on the periphery of the touch screen, in particular each transmitter 205, 206, 208, 209, 210, 21 1, 213, 214 and each receiver 207, 212, and separates them. from outside the interaction interface 200; 300.
Une première plaque de protection 216 est insérée dans une ouverture ménagée à cet effet dans le cadre 217. La première plaque de protection 216, ici de forme rectangulaire, est transparente au moins en partie dans le domaine de rayonnement infrarouge dans lequel rayonne les émetteurs mentionnés ci-dessus. Elle recouvre les premiers émetteurs 205, 206, 208 et 209 ainsi que le récepteur 207, et les sépare de l'extérieur de l'interface d'interaction.  A first protection plate 216 is inserted into an opening provided for this purpose in the frame 217. The first protection plate 216, here rectangular in shape, is transparent at least partly in the infrared radiation range in which the emitters mentioned above. It covers the first transmitters 205, 206, 208 and 209 and the receiver 207, and separates them from outside the interaction interface.
Une seconde plaque de protection 215, comparable à la première plaque de protection 216, elle aussi insérée dans une ouverture ménagée à cet effet dans le cadre 217 (comme on peut le voir plus en détail sur la figure 5), recouvre les seconds émetteurs 210, 21 1 , 213 et 214 ainsi que le second récepteur 212.  A second protection plate 215, comparable to the first protection plate 216, also inserted in an opening provided for this purpose in the frame 217 (as can be seen in more detail in FIG. 5), covers the second emitters 210. , 21 1, 213 and 214 as well as the second receiver 212.
Selon un autre mode de réalisation, on peut prévoir qu'une partie au moins du cadre 217 est transparente dans ledit domaine de rayonnement infrarouge, et que le cadre 217 remplit alors directement la fonction d'un cadre ainsi que la fonction d'une plaque de protection, telles que présentées ci-dessus.  According to another embodiment, it is possible to provide that at least part of the frame 217 is transparent in said infrared radiation range, and that the frame 217 then directly fulfills the function of a frame as well as the function of a plate of protection as presented above.
Selon encore un autre mode de réalisation, on peut prévoir que l'ensemble des récepteurs 207, 212 et des émetteurs 205, 206, 208, 209, 210, 21 1 , 213, 214 mentionnés ci-dessus sont recouverts d'une unique plaque de protection.  According to yet another embodiment, it is possible for all of the above-mentioned receivers 207, 212 and transmitters 205, 206, 208, 209, 210, 21 1, 213, 214 to be covered by a single plate. protection.
L'interface d'interaction 300 de la figure 3 diffère de celle représentée sur la figure 2 en ce qu'elle comprend en outre des troisièmes émetteurs 301 , 302, 303 qui rayonnent dans ledit domaine infrarouge, ainsi qu'un troisième récepteur 304 adapté à détecter un rayonnement dans ledit domaine infrarouge, répartis le long d'un troisième bord 204 du contour rectangulaire de l'écran tactile 201 .  The interaction interface 300 of FIG. 3 differs from that shown in FIG. 2 in that it further comprises third transmitters 301, 302, 303 which radiate in said infrared range, as well as a third receiver 304 adapted detecting radiation in said infrared range, distributed along a third edge 204 of the rectangular contour of the touch screen 201.
Les troisièmes émetteurs 301 , 302 et 303, et le troisième récepteur 304 sont recouverts d'une troisième plaque de protection 305, similaire à la première plaque de protection 216 décrite ci-dessus, et insérée dans une ouverture ménagée à cet effet dans le cadre 217.  The third emitters 301, 302 and 303, and the third receiver 304 are covered with a third protection plate 305, similar to the first protection plate 216 described above, and inserted into an opening provided for this purpose in the frame. 217.
En éclairant ainsi la zone située en avant de l'écran tactile 201 depuis trois des bords de cet écran tactile, une zone encore plus grande est éclairée en vis-à-vis de ce dernier, et de manière encore plus homogène. Les trois récepteurs 207, 212 et 304 sont répartis ici sur trois côtés distincts 202, 203 et 204 du contour rectangulaire de l'écran tactile 201 . By illuminating the area in front of the touch screen 201 from three of the edges of this touch screen, an even larger area is illuminated vis-à-vis the latter, and even more homogeneous. The three receivers 207, 212 and 304 are distributed here on three distinct sides 202, 203 and 204 of the rectangular contour of the touch screen 201.
Répartir ainsi ces trois récepteurs autour de l'écran tactile 201 , en trois positions distantes les unes des autres, permet une détection particulièrement efficace du rayonnement que réfléchit une main d'un utilisateur présente au dessus de l'interface d'interaction 300. Cet arrangement améliore par ailleurs la précision d'un repérage, éventuellement tridimensionnel, de la position de la main d'un utilisateur (ou de la position d'un objet) située face à l'interface d'interaction par un tel détecteur de proximité 15.  Thus distributing these three receivers around the touch screen 201, in three positions distant from each other, allows a particularly effective detection of the radiation reflected by a hand of a user present above the interaction interface 300. arrangement also improves the accuracy of a location, possibly three-dimensional, of the position of the hand of a user (or of the position of an object) located in front of the interaction interface by such a proximity detector 15 .
Comme le montre la figure 5, l'écran tactile 201 comprend des moyens d'affichage 41 1 , tels par exemple qu'un écran à cristaux liquides ou un écran à diodes électroluminescentes, et une dalle tactile 401 superposée aux moyens d'affichage 41 1 , à l'avant de ceux-ci.  As shown in FIG. 5, the touch screen 201 comprises display means 41 1, such as for example a liquid crystal display or a light-emitting diode screen, and a touch-sensitive panel 401 superimposed on the display means 41. 1, in front of them.
La dalle tactile 401 est protégée par une plaque 402 qui la recouvre. La plaque 402 est transparente au moins en partie dans le domaine de rayonnement visible. Il s'agit par exemple d'une plaque de verre. La plaque 402 présente, du côté de l'extérieur de l'interface d'interaction, une face accessible 218 qui constitue la face avant 218 de l'écran tactile 201 .  The touch screen 401 is protected by a plate 402 which covers it. The plate 402 is transparent at least in part in the visible radiation range. This is for example a glass plate. The plate 402 has, on the outside side of the interaction interface, an accessible face 218 which constitutes the front face 218 of the touch screen 201.
La dalle tactile 401 permet, en exploitant par exemple des effets capacitifs, ou des effets résistifs, de détecter la présence d'au moins un doigt d'un utilisateur sur la face avant 218, et de déterminer la position qu'y pointe ce doigt.  The touch screen 401 makes it possible, for example by using capacitive effects, or resistive effects, to detect the presence of at least one finger of a user on the front face 218, and to determine the position pointed by this finger. .
Selon une caractéristique particulièrement avantageuse, il est prévu que l'un au moins des émetteurs 205, 206, 208, 209, 210, 21 1 , 213, 214, 301 , 302, 303 est monté fixement sur une plaque-support de circuit imprimé 406, et que celle-ci est inclinée par rapport à la face avant 218 de l'écran tactile 201 , de telle manière que l'émetteur 214 présente une direction moyenne d'émission Ai dirigée vers l'espace situé à l'avant dudit écran tactile 201 .  According to a particularly advantageous characteristic, it is provided that at least one of the emitters 205, 206, 208, 209, 210, 21 1, 213, 214, 301, 302, 303 is fixedly mounted on a printed circuit support plate 406, and that it is inclined relative to the front face 218 of the touch screen 201, so that the transmitter 214 has a mean direction of emission Ai directed towards the space located in front of said touch screen 201.
L'émetteur 214 peut par exemple être fixé sur la plaque-support de circuit imprimé 406 par deux soudures permettant de le connecter électriquement au module de commande 1 1 décrit ci-dessus.  The transmitter 214 may for example be fixed on the printed circuit support plate 406 by two welds for electrically connecting the control module 1 1 described above.
On notera que seul l'agencement de l'émetteur 214 est ici représenté sur la figure 5, mais que l'agencement des autres émetteurs 205, 206, 208, 209, 210, 21 1 , 213, 301 , 302, 303 et des récepteurs 207, 212, 304 est sensiblement le même. Les rayons lumineux émis par l'émetteur 214 dans ledit domaine de rayonnement infrarouge sortent de l'interface d'interaction en traversant la seconde plaque de protection 215. It should be noted that only the arrangement of the transmitter 214 is shown here in FIG. 5, but that the arrangement of the other emitters 205, 206, 208, 209, 210, 21 1, 213, 301, 302, 303 and Receivers 207, 212, 304 is substantially the same. The light rays emitted by the transmitter 214 in the said infrared radiation range leave the interaction interface while passing through the second protection plate 215.
Parmi les différents bords délimitant la plaque-support de circuit imprimé 406, le bord 412 est celui qui est le plus proche de la plaque de protection 215. L'émetteur 214 est avantageusement positionné à proximité de ce bord 412, de manière à être ainsi positionné au plus près de la seconde plaque de protection 215. Cette proximité permet à des rayons lumineux, émis par l'émetteur 214, de traverser ladite seconde plaque de protection 215 même si leur direction est très inclinée par rapport à une direction perpendiculaire à la seconde plaque de protection 215 (comme c'est par exemple le cas du rayon lumineux 420), et même si la plaque de protection 215 a des dimensions limitées, comme cela a été mentionné ci-dessus.  Among the various edges delimiting the printed circuit support plate 406, the edge 412 is the one which is the closest to the protection plate 215. The emitter 214 is advantageously positioned near this edge 412, so as to be positioned closest to the second protection plate 215. This proximity allows light rays, emitted by the transmitter 214, to pass through said second protection plate 215 even if their direction is very inclined relative to a direction perpendicular to the second protective plate 215 (as for example the case of the light beam 420), and even if the protection plate 215 has limited dimensions, as mentioned above.
Selon un mode de réalisation préféré, on peut prévoir que la plaque- support de circuit imprimé 406 présente un contour en forme de rectangle, et que plusieurs des émetteurs 210, 21 1 , 213, 214 ainsi, de manière optionnelle, que le récepteur 212, sont fixés sur cette même plaque-support, à proximité du bord 412.  According to a preferred embodiment, provision can be made for the printed circuit support plate 406 to have a rectangle-shaped contour, and for several of the emitters 210, 21 1, 213, 214 to be optional, that the receiver 212 , are fixed on this same support plate, near the edge 412.
Utiliser ainsi une même plaque-support de circuit imprimé 406 comme support de plusieurs émetteurs ou récepteurs réduit le nombre de pièces que comprend l'interface d'interaction 200 ou 300. Cet arrangement en facilite par ailleurs la fabrication, puisqu'une seule opération de montage est alors nécessaire pour installer plusieurs émetteurs ou récepteurs.  Thus using a same printed circuit support plate 406 as a support for several transmitters or receivers reduces the number of parts that includes the interaction interface 200 or 300. This arrangement also facilitates the manufacture, since a single operation of mounting is then required to install multiple transmitters or receivers.
Le faisceau de rayons lumineux émis par l'émetteur 214, et qui émerge de la seconde plaque de protection 215, a approximativement la forme d'un cône, dont le sommet est sensiblement situé au niveau de l'émetteur 214. L'axe de ce cône, correspond à la direction moyenne d'émission Ai de l'émetteur 214, et il est dirigé de l'émetteur 214 vers l'espace situé à l'avant de l'écran tactile 201 , comme mentionné ci-dessus. Il est sensiblement orthogonal au plan de la plaque-support de circuit imprimé 406.  The beam of light rays emitted by the emitter 214, which emerges from the second protection plate 215, is approximately cone-shaped, the apex of which is substantially located at the emitter 214. The axis of this cone, corresponds to the average transmission direction Ai of the transmitter 214, and is directed from the transmitter 214 to the space at the front of the touch screen 201, as mentioned above. It is substantially orthogonal to the plane of the printed circuit support plate 406.
Parmi les rayons lumineux qui le composent, le rayon 420 est celui qui rase le plus la face avant 218 de l'écran tactile, et le rayon 421 est celui qui s'écarte le plus de celle-ci.  Among the light rays that compose it, the radius 420 is the one that shaves the front face 218 of the touch screen the most, and the radius 421 is the one that deviates the most from it.
La zone éclairée par ce faisceau de rayons lumineux est ainsi délimitée, du côté situé à proximité de la face avant 218 de l'écran tactile, par le rayon lumineux 420, et, du côté opposé, par le rayon lumineux 421 . The zone illuminated by this beam of light rays is thus delimited, on the side located near the front face 218 of the touch screen, by the radius 420, and, on the opposite side, by the light beam 421.
Pour que la zone de l'espace éclairée 440 s'étende à partir du voisinage immédiat de la face avant 218 de l'écran tactile (et au dessus de celle-ci), le rayon lumineux 420 délimitant cette zone éclairée 440 doit être le plus rasant possible par rapport à la face avant 218 de l'écran tactile. Il doit ainsi former avec la face avant 218 un angle a aussi petit que possible (voir figure 4).  For the area of the illuminated space 440 to extend from the immediate vicinity of the front face 218 of the touch screen (and above it), the light ray 420 defining this illuminated area 440 must be the as much as possible with respect to the front face 218 of the touch screen. It must thus form with the front face 218 an angle α as small as possible (see Figure 4).
Grâce à l'inclinaison susmentionnée de la plaque-support de circuit imprimé 406 sur laquelle est fixé l'émetteur 214, des valeurs comprises par exemple entre 1 ° et 20° peuvent être obtenues pour l'angle a.  With the aforementioned inclination of the printed circuit support plate 406 to which the transmitter 214 is fixed, values of for example between 1 ° and 20 ° can be obtained for the angle α.
Sur la figure 4, on a également représenté l'émetteur 209, dont on rappelle qu'il est situé le long du premier bord 202 de l'écran tactile (celui opposé au second bord 203 le long duquel est situé l'émetteur 214). De manière similaire à l'émetteur 214, il est fixé sur une plaque-support de circuit imprimé 450 inclinée par rapport à la face avant 218 de l'écran tactile, grâce à quoi il présente une direction moyenne d'émission dirigée vers l'espace situé à l'avant de écran tactile 201 .  FIG. 4 also shows the transmitter 209, which is reminded that it is located along the first edge 202 of the touch screen (the one opposite the second edge 203 along which the transmitter 214 is located) . Similarly to the transmitter 214, it is fixed on a printed circuit support plate 450 inclined with respect to the front face 218 of the touch screen, whereby it has a mean direction of emission directed towards the space located at the front of touch screen 201.
L'écran tactile 201 présente une forme extérieure sensiblement symétrique par rapport à un plan P perpendiculaire à sa face avant 218, et parallèle au premier bord 202 de la face avant 218.  The touch screen 201 has an outer shape substantially symmetrical with respect to a plane P perpendicular to its front face 218, and parallel to the first edge 202 of the front face 218.
L'inclinaison de la plaque support de circuit imprimé 405 peut par exemple être sensiblement symétrique, par rapport à ce plan P, de celle de la plaque-support 406.  The inclination of the printed circuit support plate 405 may for example be substantially symmetrical with respect to this plane P, that of the support plate 406.
Le faisceau de rayons lumineux émis par l'émetteur 209 est alors sensiblement symétrique, par rapport à ce plan P, du faisceau de rayons lumineux émis par l'émetteur 214.  The beam of light rays emitted by the emitter 209 is then substantially symmetrical, with respect to this plane P, of the beam of light rays emitted by the emitter 214.
Parmi les rayons lumineux qui le composent, le rayon 430 est celui qui rase le plus la face avant 218 de l'écran tactile, et le rayon 431 est celui qui s'écarte le plus de celle-ci.  Among the light rays that compose it, the radius 430 is the one that shaves the front face 218 of the touch screen the most, and the radius 431 is the one that deviates the most from it.
La zone 440 de l'espace, qui est éclairée par les émetteurs 205, 206, 208, 209, 210, 21 1 , 213, 214 (et 301 , 302, 303 dans le cas de l'interface d'interaction 300) avec un éclairement suffisant pour permettre la détection de la main d'un utilisateur (ou d'un objet), est délimitée notamment par les rayons lumineux 420, 430, 421 et 431 mentionnés ci-dessus, comme on peut le voir sur la figure 4. Elle peut par exemple être sensiblement symétrique par rapport au plan P mentionné ci-dessus. The zone 440 of the space, which is illuminated by the emitters 205, 206, 208, 209, 210, 21 1, 213, 214 (and 301, 302, 303 in the case of the interaction interface 300) with an illumination sufficient to allow the detection of the hand of a user (or an object) is delimited in particular by the light rays 420, 430, 421 and 431 mentioned above, as can be seen in FIG. 4 It can for example be substantially symmetrical with respect to the plane P mentioned above.
La zone éclairée 440 peut s'étendre, face à l'écran tactile 201 jusqu'à une distance d'avec la face avant 218 de l'écran tactile pouvant atteindre jusqu'à 50 centimètres, autorisant ainsi la détection de la main d'un utilisateur, ou d'un objet, jusqu'à une telle distance.  The illuminated zone 440 may extend, facing the touch screen 201 to a distance from the front face 218 of the touch screen up to 50 centimeters, thus allowing detection of the hand of a user, or an object, to such a distance.
L'interface d'interaction 200 ou 300 comprend par ailleurs un châssis 407, auquel peuvent être fixés les moyens d'affichage 41 1 .  The interaction interface 200 or 300 furthermore comprises a chassis 407 to which the display means 41 1 can be attached.
Comme le montre la figure 5, le châssis 407 peut présenter une surface libre 409, inclinée par rapport à la face avant 218 de l'écran tactile, sur laquelle s'appuie la plaque-support de circuit imprimé 406.  As shown in FIG. 5, the chassis 407 may have a free surface 409, inclined with respect to the front face 218 of the touch screen, on which the printed circuit support plate 406 is based.
Selon un mode de réalisation particulier, la surface libre 409 est située à l'extrémité d'une partie du châssis 407 qui forme une colonne 408, la colonne 408 s'étendant à partir du fond du châssis 407, dans une direction sensiblement perpendiculaire à ce dernier, jusqu'à la surface libre 409.  According to a particular embodiment, the free surface 409 is located at the end of a portion of the frame 407 which forms a column 408, the column 408 extending from the bottom of the frame 407, in a direction substantially perpendicular to the latter, up to the free surface 409.
La plaque-support de circuit imprimé 406 est fixée au châssis 407 au niveau de la surface libre 409, par des moyens de fixation 410. Les moyens de fixation 410 comprennent par exemple une vis, dont la tige filetée est engagée dans un trou taraudé ménagé dans le châssis 407, et s'étend selon un axe A2 sensiblement perpendiculaire à la surface libre 409. La plaque-support de circuit imprimé 406 est alors pressée sur la surface libre 409 par la tête de la vis 410, et ainsi maintenue fixement sur ladite surface libre 409.  The printed circuit support plate 406 is fixed to the frame 407 at the free surface 409 by fastening means 410. The fastening means 410 comprise, for example, a screw whose threaded rod is engaged in a tapped hole. in the frame 407, and extends along an axis A2 substantially perpendicular to the free surface 409. The printed circuit support plate 406 is then pressed on the free surface 409 by the head of the screw 410, and thus held fixedly on said free surface 409.
L'interface d'interaction 200 ou 300 peut comprendre, pour la fixation des émetteurs 205, 206, 208, 209, 210, 21 1 , 213, 301 , 302, 303 et récepteurs 207, 212, 204, d'autres plaques-supports de circuit imprimé, fixées sur le châssis 407 de manière comparable à la plaque-support de circuit imprimé 406.  The interaction interface 200 or 300 may comprise, for the attachment of the transmitters 205, 206, 208, 209, 210, 21 1, 213, 301, 302, 303 and the receivers 207, 212, 204, other plates printed circuit boards attached to the frame 407 in a manner comparable to the printed circuit board support plate 406.

Claims

REVENDICATIONS
1 . Interface d'interaction (200 ; 300) comprenant : 1. Interaction interface (200; 300) comprising:
- un écran tactile (201 ) présentant une face avant (218) sensiblement plane, et  a touch screen (201) presenting a substantially plane front face (218), and
- un détecteur de proximité (15) comportant au moins un émetteur (205, 206, 208, 209, 210, 21 1 , 213, 214, 301 , 302, 303) qui rayonne dans un domaine infrarouge et qui est situé sur le pourtour dudit écran tactile (201 ), et au moins un récepteur (207, 212, 304) adapté à détecter un rayonnement dans ledit domaine infrarouge,  - a proximity detector (15) comprising at least one transmitter (205, 206, 208, 209, 210, 21 1, 213, 214, 301, 302, 303) which radiates in an infrared range and which is located on the periphery said touch screen (201), and at least one receiver (207, 212, 304) adapted to detect radiation in said infrared range,
caractérisée en ce que ledit émetteur (205, 206, 208, 209, 210, 21 1 , 213, 214, 301 , 302, 303) est monté fixement sur une plaque-support de circuit imprimé (406) qui est inclinée par rapport à la face avant (218) dudit écran tactile (201 ) de telle manière que ledit émetteur (205, 206, 208, 209, 210, 21 1 , 213, 214, 301 , 302, 303) présente une direction moyenne d'émission (Ai) dirigée vers l'espace (440) situé à l'avant dudit écran tactile (201 ).  characterized in that said transmitter (205, 206, 208, 209, 210, 21, 213, 214, 301, 302, 303) is fixedly mounted on a printed circuit support plate (406) which is inclined with respect to the front face (218) of said touch screen (201) such that said emitter (205, 206, 208, 209, 210, 21 1, 213, 214, 301, 302, 303) has a mean direction of emission ( Ai) directed to the space (440) located at the front of said touch screen (201).
2. Interface d'interaction (200 ; 300) selon la revendication 1 , dans laquelle il est prévu un châssis (407) dont une partie située à l'arrière de ladite plaque-support (406) présente une surface libre (409) inclinée par rapport à la face avant (218) dudit écran tactile (201 ), la plaque-support de circuit imprimé (406) prenant appui sur ladite surface libre (409) et étant fixée à cette dernière par des moyens de fixation (410).  The interaction interface (200; 300) according to claim 1, wherein there is provided a frame (407) having a portion at the rear of said support plate (406) having a free inclined surface (409). relative to the front face (218) of said touch screen (201), the printed circuit support plate (406) bearing on said free surface (409) and being fixed thereto by fixing means (410).
3. Interface d'interaction (200 ; 300) selon l'une des revendications 1 ou 2, dans laquelle il est prévu au moins une plaque de protection (215), transparente dans ledit domaine de rayonnement infrarouge, séparant l'émetteur (205, 206, 208, 209, 210, 21 1 , 213, 214, 301 , 302, 303) de l'extérieur de ladite interface d'interaction (200 ; 300), dans laquelle la plaque-support de circuit imprimé (406) est positionnée de sorte qu'un de ses bords (412) est situé à proximité de ladite plaque de protection (215), et dans laquelle l'émetteur (205, 206, 208, 209, 210, 21 1 , 213, 214, 301 , 302, 303) est monté sur ladite plaque-support de circuit imprimé, à proximité dudit bord, de sorte que l'émetteur (205, 206, 208, 209, 210, 21 1 , 213, 214, 301 , 302, 303) est situé à proximité de ladite plaque de protection (215). 3. Interaction interface (200; 300) according to one of claims 1 or 2, wherein there is provided at least one protection plate (215), transparent in said infrared radiation range, separating the transmitter (205). , 206, 208, 209, 210, 21 1, 213, 214, 301, 302, 303) from outside said interaction interface (200; 300), wherein the printed circuit support plate (406) is positioned so that one of its edges (412) is located near said guard plate (215), and wherein the transmitter (205, 206, 208, 209, 210, 21 1, 213, 214, 301, 302, 303) is mounted on said printed circuit support plate, near said edge, so that the transmitter (205, 206, 208, 209, 210, 21 1, 213, 214, 301, 302, 303) is located near said protection plate (215).
4. Interface d'interaction (200 ; 300) selon l'une des revendications 1 à 3, dans laquelle l'émetteur (205, 206, 208, 209, 210, 21 1 , 213, 214, 301 , 302, 303) comprend une diode électroluminescente. 4. Interaction interface (200; 300) according to one of claims 1 to 3, wherein the transmitter (205, 206, 208, 209, 210, 21 1, 213, 214, 301, 302, 303) comprises a light emitting diode.
5. Interface d'interaction (200 ; 300) selon l'une des revendications 1 à 4, dans laquelle le récepteur (207, 212, 304) comprend une photodiode.  Interaction interface (200; 300) according to one of claims 1 to 4, wherein the receiver (207, 212, 304) comprises a photodiode.
6. Interface d'interaction (200 ; 300) selon l'une des revendications 1 à 4, dans laquelle le récepteur (207, 212, 304) comprend un phototransistor.  The interaction interface (200; 300) according to one of claims 1 to 4, wherein the receiver (207, 212, 304) comprises a phototransistor.
7. Interface d'interaction (200 ; 300) selon l'une des revendications 1 à 6, comprenant au moins deux émetteurs (205, 206, 208, 209, 210, 21 1 , 213, 214) adaptés à émettre un rayonnement dans ledit domaine infrarouge, dans laquelle ladite face avant (218) de l'écran tactile (201 ) présente un contour en forme de rectangle, et dans laquelle l'un desdits émetteurs (205, 206, 208, 209) est situé le long d'un premier bord (202) dudit rectangle et l'autre desdits émetteurs (210, 21 1 , 213, 214) est situé le long d'un bord (203) dudit rectangle opposé au premier bord (202).  7. interaction interface (200; 300) according to one of claims 1 to 6, comprising at least two transmitters (205, 206, 208, 209, 210, 21 1, 213, 214) adapted to emit radiation in said infrared range, wherein said front face (218) of the touch screen (201) has a rectangle-shaped outline, and wherein one of said transmitters (205, 206, 208, 209) is located along a first edge (202) of said rectangle and the other of said emitters (210, 21 1, 213, 214) is located along an edge (203) of said rectangle opposite the first edge (202).
PCT/FR2016/050344 2015-02-23 2016-02-15 Interaction interface comprising a touch screen and a proximity detector WO2016135392A1 (en)

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FR1551535A FR3033059B1 (en) 2015-02-23 2015-02-23 INTERACTION INTERFACE COMPRISING A TOUCH SCREEN AND A PROXIMITY DETECTOR
FR1551535 2015-02-23

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US20110298732A1 (en) * 2010-06-03 2011-12-08 Sony Ericsson Mobile Communications Japan, Inc. Information processing apparatus and information processing method method
US20120194511A1 (en) * 2011-01-31 2012-08-02 Pantech Co., Ltd. Apparatus and method for providing 3d input interface
US20130043928A1 (en) * 2011-08-19 2013-02-21 Hysonic Co., Ltd. Motion sensing switch
KR20140065934A (en) * 2012-11-22 2014-05-30 주식회사 루멘스 Gesture sensor module and handheld device including the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110298732A1 (en) * 2010-06-03 2011-12-08 Sony Ericsson Mobile Communications Japan, Inc. Information processing apparatus and information processing method method
US20120194511A1 (en) * 2011-01-31 2012-08-02 Pantech Co., Ltd. Apparatus and method for providing 3d input interface
US20130043928A1 (en) * 2011-08-19 2013-02-21 Hysonic Co., Ltd. Motion sensing switch
KR20140065934A (en) * 2012-11-22 2014-05-30 주식회사 루멘스 Gesture sensor module and handheld device including the same

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FR3033059B1 (en) 2017-02-17
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