An interaction system is disclosed comprising a positioning unit configured to receive spatial data of the position of a user, a processing unit configured to detect a feature of a user's body, hand and/or an input object based on the spatial data, determine, upon detecting said feature, user coordinates of the user's hand and/or the input object, based on the spatial data, generate a mapping region as a range of input coordinates, map the mapping region to a display coordinate system of an interaction display, determine an associated onset input coordinate of the user's hand and/or input object in the mapping region, map the onset input coordinate to the display coordinate system, generate a control signal to display an output associated with the onset input coordinate at a display coordinate in the display coordinate system.
G06F 3/01 - Dispositions d'entrée ou dispositions d'entrée et de sortie combinées pour l'interaction entre l'utilisateur et le calculateur
G06F 3/0346 - Dispositifs de pointage déplacés ou positionnés par l'utilisateur; Leurs accessoires avec détection de l’orientation ou du mouvement libre du dispositif dans un espace en trois dimensions [3D], p.ex. souris 3D, dispositifs de pointage à six degrés de liberté [6-DOF] utilisant des capteurs gyroscopiques, accéléromètres ou d’inclinaiso
2.
A VIRTUAL-REALITY INTERACTION SYSTEM WITH HAPTIC FEEDBACK
A virtual-reality (VR) interaction system is disclosed comprising a VR controller configured to generate a virtual space within a VR environment coordinate system to be displayed in a wearable display device for a user, the VR controller determines VR object coordinates of virtual objects in relation to a virtual user location in the virtual space, and detects a probability for an interaction event, between the user and a virtual object, send the interaction rule to the feedback controller as the probability satisfies a defined probability threshold, the feedback controller is configured to compare the interaction rule with the user motion data received from a sensor, the interaction rule comprises a motion criterion for tactile output, and send tactile output instructions to a haptic feedback device when the motion data satisfies the motion criterion. A related method is disclosed.
An interaction system is disclosed comprising a positioning unit configured to provide spatial position information of the position of an interaction surface relative to a user, and of the position of an input object relative to the interaction surface, a contact with the interaction surface is detected as a contact event, a processing unit configured to map the spatial position information of the interaction surface and the input object to the XR environment coordinate system, generate a virtual representation of the input motion in the XR environment coordinate system while the contact event is detected, communicate a set of XR environment coordinates of the interaction surface and of the virtual representation of the input motion to an XR output device so that the interaction surface is displayed as a virtual user surface within a virtual space together with the virtual representation of the input motion.
A virtual-reality (VR) interaction system is disclosed comprising a VR controller configured to generate a model of a user within a virtual space to be displayed in a wearable display device, and a positioning unit configured to receive spatial position information around the user, the spatial position information comprises a first set of spatial data of the user and of a placement of a peripheral sensor, captured by a point of view (POV) sensor of the wearable display device when worn by the user, and a second set of spatial data of the user and of a placement of the POV sensor, captured by the peripheral sensor, determine user coordinates of the user in the room based on a relative sensor position and the first and second sets of spatial data, and communicate the user coordinates to the VR controller to generate the model.
A collaborative content system, comprising: a local device running a video conferencing application, a local interactive system running an instance of a video conferencing application, a video conferencing backend system configured to: provide a video conferencing session to video conferencing application, receive a request for a whiteboard application session from a video conferencing application, provide the request for the whiteboard application session to collaborative application backend system, the collaborative application backend system configured to: generate the whiteboard application session, provide the whiteboard application session to the video conferencing backend system, provide the whiteboard application session to the whiteboard application for real-time collaborative editing by the user.
A touch sensing apparatus for suppressing involuntary touch input is disclosed, comprising a touch surface, a touch sensor configured to determine touch input coordinates on the touch surface of an input object in contact with the touch surface, wherein the input object is a stylus held by a user or a user's finger, determine secondary input coordinates of said user in the vicinity of the touch input coordinates as a palm area based on a threshold area for identifying palm input, wherein the touch sensing apparatus is configured to generate a suppression area around the palm area in which the involuntary touch input is suppressed, wherein the suppression area extends in a direction from the palm area based on the position of the touch input coordinates relative the palm area. A related method in a touch sensing apparatus is disclosed.
G06F 3/041 - Numériseurs, p.ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction
G06F 3/0354 - Dispositifs de pointage déplacés ou positionnés par l'utilisateur; Leurs accessoires avec détection des mouvements relatifs en deux dimensions [2D] entre le dispositif de pointage ou une partie agissante dudit dispositif, et un plan ou une surface, p.ex. souris 2D, boules traçantes, crayons ou palets
G06F 3/038 - Dispositions de commande et d'interface à cet effet, p.ex. circuits d'attaque ou circuits de contrôle incorporés dans le dispositif
G06F 3/04886 - Techniques d’interaction fondées sur les interfaces utilisateur graphiques [GUI] utilisant des caractéristiques spécifiques fournies par le périphérique d’entrée, p.ex. des fonctions commandées par la rotation d’une souris à deux capteurs, ou par la nature du périphérique d’entrée, p.ex. des gestes en fonction de la pression exer utilisant un écran tactile ou une tablette numérique, p.ex. entrée de commandes par des tracés gestuels par partition en zones à commande indépendante de la surface d’affichage de l’écran tactile ou de la tablette numérique, p.ex. claviers virtuels ou menus
A method of videoconferencing between a presenter and a remote user comprises outputting a display signal configured to display an image on a presenter display and on a remote user display. The method also comprises receiving one or more images of the presenter. The method further comprises determining a gaze direction of the presenter with respect to the displayed image on the presenter display based on the received images of the presenter. The method comprises determining a presenter gaze object in the displayed image based on the determined gaze direction. The method comprises modifying the output display signal configured to display a modified image on the remote user display based on the determined presenter gaze object.
A method of videoconferencing between a first user and a second user comprises receiving at least one first image data of the first user from a first camera mounted behind a first display. The first display is configured to be optically transmissive with respect to the first camera. The method also comprises receiving at least one second image data from a second camera of the first user. The method further comprises generating the modified image data based on the first image data and the second image data. The method further yet comprises sending a display signal comprising the modified image data configured to be displayed for the second user on a second display.
A method of video conferencing between a plurality of users at a first videoconferencing terminal and a second videoconferencing terminal comprises receiving one or more images of at least one first user at the first videoconferencing terminal. The method further comprises determining at least one change in the interaction status of the at least one first user at the first videoconferencing terminal based on the received one or more images. The method further comprises sending a control signal to modify a mute status of a microphone and / or a speaker at the first videoconferencing terminal based on the determined changed interaction status.
A touch sensing display comprises a frame comprising at least one surface mounting. The touch sensing display also comprises a panel defining a touch surface on a first side and being mounted to the frame around a periphery of the panel. The touch sensing display further comprises at least one touch detector configured to detect a touch event on the touch surface. A display apparatus is mounted to the frame and facing rear surface on a second side of the panel. The display apparatus is configured to receive a touch event signal from the at least one touch detector. The frame is load bearing and arranged to support the weight of the touch sensing display when the at least one surface mounting is attached to a surface.
G06F 3/042 - Numériseurs, p.ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction par des moyens opto-électroniques
F16M 13/02 - Autres supports ou appuis pour positionner les appareils ou les objets; Moyens pour maintenir en position les appareils ou objets tenus à la main pour être portés par un autre objet ou lui être fixé, p.ex. à un arbre, une grille, un châssis de fenêtre, une bicyclette
G02F 1/1333 - Dispositions relatives à la structure
An interaction system for receiving gesture input from an object is disclosed comprising a panel having a surface and a perimeter, the surface extending in a plane having a normal axis, a sensor configured to detect incident light from the object, a processor in communication with the sensor and being configured to determine a position of the object relative the surface based on the incident light, when the object is at a distance from the surface along the normal axis, determine the gesture input based on said position, and output a control signal to control the interaction system based on the gesture input.
The present disclosure relates to a touch sensing apparatus including a frame (2) comprising a first frame profile (21), a second frame profile (22), a third frame profile (23), and a fourth frame profile (24), wherein the first frame profile (21) and the second frame profile (22) form long sides of the frame (2), and the third frame profile (23) and the fourth frame profile form short sides of the frame (2), a front cover (3) arranged on the frame (2), the front cover (3) having a front surface (3a) and a rear surface, a display panel arranged on the frame (2), and a plurality of detectors arranged on first frame profile (21), and a plurality of emitters arranged on the second frame profile (22), wherein at least a portion of the first frame profile (21) and at least a portion of the second frame profile (22) are adapted to act on the front cover (3) with a force in a first direction parallel with a normal of the front surface (3a) of the front cover (3), and wherein at least a portion of the third frame profile (23) and at least a portion of the fourth frame profile (24) are adapted to act on the front cover (3) with a force in a second direction, opposite the first direction.
A touch sensing apparatus is disclosed comprising a panel having a touch surface, emitters and detectors arranged along a perimeter, a light directing portion arranged adjacent the perimeter and comprising a light directing surface, the emitters and/or the detectors are arranged opposite a rear surface of the panel to emit and/or receive light through a channel in a frame element, the channel is arranged opposite the rear surface and extends in a direction of a normal axis of the touch surface, the light directing surface and the channel are arranged on opposite sides of the panel and overlap in the direction of the plane, the light directing surface receive light from the emitters, or direct light to the detectors, through the panel and through the channel, in the direction of the normal axis. A method of manufacturing a frame element for a touch sensing apparatus is disclosed.
An interactive device is described that is configured to: display an output of a remote device, wherein an output delay exists between the output being generated by the remote device and the output being displayed on the interactive device, generate an interaction data in dependence on an interaction with the interactive device at a location, transmit the interaction data to the remote device, display an updated output of the remote device, the updated output being generated by the remote device subsequent to receiving the interaction data, wherein the interactive device being further configured to: generate an interaction image of an area of the updated output of the remote device corresponding to the location of the interaction, determine an interaction indication in dependence on the interaction image, displaying an interaction indication on the interactive device at a location of one or more further interactions with the interactive device.
G06F 3/0481 - Techniques d’interaction fondées sur les interfaces utilisateur graphiques [GUI] fondées sur des propriétés spécifiques de l’objet d’interaction affiché ou sur un environnement basé sur les métaphores, p.ex. interaction avec des éléments du bureau telles les fenêtres ou les icônes, ou avec l’aide d’un curseur changeant de comport
G06F 3/0487 - Techniques d’interaction fondées sur les interfaces utilisateur graphiques [GUI] utilisant des caractéristiques spécifiques fournies par le périphérique d’entrée, p.ex. des fonctions commandées par la rotation d’une souris à deux capteurs, ou par la nature du périphérique d’entrée, p.ex. des gestes en fonction de la pression exer
Described is an interaction system comprising an imaging device, such as a camera system, configured to image one or more users, wherein the interaction device is configured to determine one of more properties of each user. For example, the interaction system may be used to determine whether the hand of each user is raised or an orientation of each user's face.
G06K 9/00 - Méthodes ou dispositions pour la lecture ou la reconnaissance de caractères imprimés ou écrits ou pour la reconnaissance de formes, p.ex. d'empreintes digitales
G06F 3/01 - Dispositions d'entrée ou dispositions d'entrée et de sortie combinées pour l'interaction entre l'utilisateur et le calculateur
G06F 3/03 - Dispositions pour convertir sous forme codée la position ou le déplacement d'un élément
G06F 3/048 - Techniques d’interaction fondées sur les interfaces utilisateur graphiques [GUI]
G06F 3/042 - Numériseurs, p.ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction par des moyens opto-électroniques
18.
AN INTERACTION INTERFACE DEVICE, SYSTEM AND METHOD FOR THE SAME
An interaction interface device for providing an interface between a touch display unit and an external device. The touch display unit comprising a display unit having a touch surface. The interaction interface device comprises a first interface between the interaction interface device and the touch display unit, the first interface being configured to: receive a first touch data from the touch display unit, wherein the first touch data corresponds to touch interactions occurring within a sub-portion of the display unit, and transmit a first video data to the touch display unit for display on the sub-portion of the display unit, a second interface between the interaction interface device and the external device, the second interface being configured to: receive the first video data from an external device, and transmit the first touch data to the external device.
G06F 3/0488 - Techniques d’interaction fondées sur les interfaces utilisateur graphiques [GUI] utilisant des caractéristiques spécifiques fournies par le périphérique d’entrée, p.ex. des fonctions commandées par la rotation d’une souris à deux capteurs, ou par la nature du périphérique d’entrée, p.ex. des gestes en fonction de la pression exer utilisant un écran tactile ou une tablette numérique, p.ex. entrée de commandes par des tracés gestuels
G06F 3/14 - Sortie numérique vers un dispositif de visualisation
G06F 9/451 - Dispositions d’exécution pour interfaces utilisateur
A touch sensing apparatus is disclosed, comprising a panel that defines a touch surface extending in a plane having a normal axis, a plurality of emitters 5 and detectors arranged along a perimeter of the panel, wherein the plurality of emitters and detectors are fixed to a first frame element extending along the perimeter, a second frame element mounted to the first frame element and extending along said perimeter, wherein the second frame element comprises first and second light directing surfaces, wherein the emitters are arranged to 0 emit light and the first and second light directing surfaces are arranged to receive the light and direct the light across the touch surface substantially parallel to the touch surface.
G06F 3/042 - Numériseurs, p.ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction par des moyens opto-électroniques
G06F 3/0354 - Dispositifs de pointage déplacés ou positionnés par l'utilisateur; Leurs accessoires avec détection des mouvements relatifs en deux dimensions [2D] entre le dispositif de pointage ou une partie agissante dudit dispositif, et un plan ou une surface, p.ex. souris 2D, boules traçantes, crayons ou palets
A touch sensing apparatus comprising a panel that defines a touch surface extending in a plane having a normal axis and a back surface opposite the touch surface, a display arranged proximal to the back surface and configured to display an image through a display portion of the touch surface, a plurality of emitters and detectors arranged along a perimeter of the panel and beneath the panel, a frame component arranged opposite the back surface of the panel, wherein the panel is configured to be shaped by one or more shaping components fixed to the panel and the frame component and configured to exert a force on the panel.
G06F 3/042 - Numériseurs, p.ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction par des moyens opto-électroniques
G06F 1/16 - TRAITEMENT ÉLECTRIQUE DE DONNÉES NUMÉRIQUES - Détails non couverts par les groupes et - Détails ou dispositions de structure
G06F 3/0354 - Dispositifs de pointage déplacés ou positionnés par l'utilisateur; Leurs accessoires avec détection des mouvements relatifs en deux dimensions [2D] entre le dispositif de pointage ou une partie agissante dudit dispositif, et un plan ou une surface, p.ex. souris 2D, boules traçantes, crayons ou palets
A touch sensing apparatus is disclosed comprising a panel that defines a touch surface extending in a plane having a normal axis and a back surface opposite the touch surface, a display arranged proximal to the back surface and configured to display an image through a display portion of the touch surface, a plurality of emitters and detectors arranged along a perimeter of the panel and beneath the panel, wherein the emitters are arranged to emit non-visible light and the first and second light directing surfaces are arranged to receive the light and direct the light across the touch surface substantially parallel to the touch surface,wherein the apparatus comprising at least one optical filter arranged outside of the display portion of the touch surface and configured to filter visible light.
G06F 3/042 - Numériseurs, p.ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction par des moyens opto-électroniques
G06F 3/0354 - Dispositifs de pointage déplacés ou positionnés par l'utilisateur; Leurs accessoires avec détection des mouvements relatifs en deux dimensions [2D] entre le dispositif de pointage ou une partie agissante dudit dispositif, et un plan ou une surface, p.ex. souris 2D, boules traçantes, crayons ou palets
The present invention is for a jig for assembling a touch sensing device. The touch sensing device has a panel that defines a touch surface and a carrier frame for mounting one or more components of the touch sensing device fixed to the periphery of the panel. The jig comprises at least one side rail releasably engageable with a periphery of the panel. The jig comprises at least one aligning tool releasably engageable with the at least one side rail and the at least one aligning tool comprises at least one coupling releasably engageable to a portion of the carrier frame. When the at least one aligning tool is engaged with the at least one side rail and the portion of the carrier frame, the portion of the carrier frame is located at a predetermined position from the at least one side rail.
A method of videoconferencing comprises displaying an image of a remote user on a display and capturing an image of a local user at a user position in front of the display. The at least one camera is located at a camera position behind the display. The method comprises modifying an image to be displayed based on the camera position of the at least one camera with respect to the display and based on the user position of the local user with respect to the display.
A touch sensing apparatus is disclosed comprising a panel that defines a touch surface extending in a plane having a normal axis, emitters and detectors arranged along a perimeter of the panel, a light directing element arranged adjacent the perimeter, the emitters are arranged to emit a respective beam of light and the light directing element is arranged to receive the beam of light through a first surface and couple out the beam of light through a second surface to direct the beam of light across the touch surface substantially parallel to the touch surface, the beam of light is received through the first surface at a first distance from the touch surface and is deflected by the light directing element to the second surface to couple out the beam of light at a second distance from the touch surface, wherein the first distance is greater than the second distance.
An elongate frame for a touch-sensitive device comprises: a bottom wall, a top wall and a side wall connected therebetween. The elongate frame also comprises a first mounting and a second mounting for respectively fixing at least one light emitter and a touch surface with respect to the frame. The elongate frame also comprises a slot at least partially positioned above the second mounting and the first mounting wherein the slot is arranged to receive an optical component.
A film application tool is for an elongate frame of touch-sensitive device wherein the elongate frame comprises a diffusion surface arranged to receive a light diffusing film. The film application tool comprises an applicator carriage moveably mountable on the elongate frame. An application surface is engageable with the diffusion surface of the elongate frame. At least one reference surface is for aligning the light diffusing film with respect to the applicator surface. When the applicator carriage moves with respect to the frame, the application surface urges the light diffusing film towards the diffusion surface.
A system is provided for processing touch data. The system comprises an operating system having a user interface and being configured to process touch data according to a first protocol and a software application running on the operating system. The software application provides an interaction area on the user interface and being configured to process touch data according to a second protocol. A touch controller is configured to send a first touch data corresponding to a touch event to the operating system via a first channel and a second touch data corresponding to the touch event to the software application via a second channel. Where the first touch data corresponds to the interaction area on the user interface, the operating system communicates the first touch data to the software application. Subsequently, where the first touch data received from the operating system corresponds to the second touch data received from the touch controller, the software application processes the first and/or second touch data according to a second protocol.
G06F 3/0488 - Techniques d’interaction fondées sur les interfaces utilisateur graphiques [GUI] utilisant des caractéristiques spécifiques fournies par le périphérique d’entrée, p.ex. des fonctions commandées par la rotation d’une souris à deux capteurs, ou par la nature du périphérique d’entrée, p.ex. des gestes en fonction de la pression exer utilisant un écran tactile ou une tablette numérique, p.ex. entrée de commandes par des tracés gestuels
G06F 3/041 - Numériseurs, p.ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction
G06F 3/147 - Sortie numérique vers un dispositif de visualisation utilisant des panneaux de visualisation
G06F 9/451 - Dispositions d’exécution pour interfaces utilisateur
A touch sensing apparatus is disclosed comprising a touch surface, and a touch sensor configured to determine a first set of coordinates on the touch surface of an object in contact with the touch surface. The touch sensing apparatus is configured to determine a virtual brush angle associated with the object, determine a movement of the object to a second set of coordinates determine an updated virtual brush angle for the object in dependence on a position of the second set of coordinates relative to the first set of coordinates, and output the second set of coordinates and the updated virtual brush angle. An associated method is also disclosed.
G06F 3/0354 - Dispositifs de pointage déplacés ou positionnés par l'utilisateur; Leurs accessoires avec détection des mouvements relatifs en deux dimensions [2D] entre le dispositif de pointage ou une partie agissante dudit dispositif, et un plan ou une surface, p.ex. souris 2D, boules traçantes, crayons ou palets
G06F 3/041 - Numériseurs, p.ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction
A touch sensing apparatus is disclosed, comprising a panel that defines a touch surface extending in a plane having a normal axis, a plurality of emitters and detectors arranged along a perimeter of the panel, a light directing element arranged adjacent the perimeter and comprising a light directing surface, wherein the emitters are arranged to emit light and the light directing surface is arranged to receive the light and direct the light across the touch surface, and wherein an optical axis of the emitted light is at an angle greater than zero from the normal axis of the touch surface.
A touch sensing apparatus is disclosed comprising a panel that defines a touch surface, a plurality of emitters and detectors arranged along a perimeter of the light transmissive panel, and a light directing arrangement arranged adjacent the perimeter. The emitters are arranged to emit a respective beam of emitted light and the light directing arrangement is arranged to direct the light along a light path from the emitters to the touch surface. A diffusive light scattering element is arranged in the light path.
A method of predicting the behaviour of one or more objects on a touch surface of a touch-sensitive apparatus comprises outputting an object position value of a first time series describing a position of the one or more objects on the touch surface. The method further comprises outputting an object position value of a second time series describing a position of the one or more objects on the touch surface. The object position value of the second time series is outputted before the corresponding object position value of the first time series. The method yet further comprises predicting the behaviour of the one or more objects based at least on the object position values of the second time series.
A touch sensing apparatus comprises a panel that defines a touch surface. A plurality of light emitters and detectors are arranged along a perimeter of the panel and the light emitters are arranged to emit a respective beam of emitted light above the touch surface. The light emitters are arranged to receive detection light from the emitted light. The touch sensing apparatus also comprises a housing on which the plurality of light emitters and detectors are mountable. At least one spacer is mounted between the panel and the housing to limit the movement of the panel with respect to the plurality of light emitters and detectors.
A method of operating a touch sensing apparatus is provided. The touch sensing apparatus comprises a panel that defines a touch surface, a plurality of light emitters and detectors arranged along a perimeter of the panel and the light emitters are arranged to emit a respective beam of emitted light above the touch surface, and the light emitters are arranged to receive detection light from the emitted light. The method further comprises emitting a beam of light from at least one light emitter. Another step of the method is detecting the emitted light at one or more detectors. Yet another step of the method is determining a distribution of blocked light by at least one mountable light blocking component on the touch sensing apparatus between the at least one light emitter and the one or more detectors.
A method of generating a 3D mapping of an object is disclosed, comprising directing a transmitted light pattern onto the object, the transmitted light pattern comprises a plurality of symbols encoding at least two possible values, receiving light comprising a reflected light pattern being reflected by the object, identifying a patch of symbols in the reflected light pattern, decoding the values of the symbols of the patch to determine a position of a symbol of the patch in the transmitted light pattern, determining a position of the symbol of the patch in the reflected light pattern, generating a displacement value corresponding to the displacement of said position of the symbol of the patch in the reflected light pattern relative to said position of the symbol of the patch in the transmitted light pattern, and generating the three-dimensional mapping of the object in dependence on the displacement value.
G06T 7/521 - Récupération de la profondeur ou de la forme à partir de la projection de lumière structurée
G01B 11/25 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer des contours ou des courbes en projetant un motif, p.ex. des franges de moiré, sur l'objet
G06F 3/01 - Dispositions d'entrée ou dispositions d'entrée et de sortie combinées pour l'interaction entre l'utilisateur et le calculateur
A touch sensitive apparatus is disclosed comprising a touch surface configured to receive touch input, a touch sensor configured to determine a surface coordinate of a touch input on the touch surface, an imaging device configured to capture image data of a user input device adapted to engage the touch surface to provide said touch input, a processing unit configured to receive a first surface coordinate of a touch input from the touch sensor; and correlate a touch input at a first surface coordinate with a first image sensor coordinate at which image data of the input device is captured; and generate a touch output signal based on the captured image data of the input device at the first image sensor coordinate. The touch output signal comprises a value for controlling user input device interaction associated with the touch input at the first surface coordinate.
A touch sensing apparatus is provided comprising: a light transmissive panel that defines a touch surface, a plurality of light emitters and detectors arranged along a perimeter of the light transmissive panel, a plurality of optical components arranged along the perimeter of the light transmissive panel, wherein the light emitters are arranged to emit a respective beam of emitted light and the optical components are configured to direct the emitted light to a path across the light transmissive panel. Optionally, optical components comprise a light guide arranged to receive light from the light emitters through a first surface and couple out light travelling in the light guide to the touch surface through a second surface. The second surface may be diffusively transmissive. The light guide may further comprise a reflective surface configured to internally reflect light travelling in the light guide from the first surface to the diffusive surface. The reflective surface may be diffusely reflective, partially diffusely reflective, or specularly reflective.
The present application describes a touch sensitive device comprising a touch sensor and a wireless receiver. The touch sensitive device is configured to: identify a new touch interaction at a position on the touch surface, receive a signal from a pen comprising a unique identifier, and match the new touch interaction to the one or more unique identifiers. The new touch interaction is matched to one of the unique identifiers in dependence on a confidence value of each of the unique identifiers and wherein the confidence value of each unique identifier is determined in dependence on characteristics of a previous touch interaction matched to the respective unique identifier.
G06F 3/041 - Numériseurs, p.ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction
G06F 3/0354 - Dispositifs de pointage déplacés ou positionnés par l'utilisateur; Leurs accessoires avec détection des mouvements relatifs en deux dimensions [2D] entre le dispositif de pointage ou une partie agissante dudit dispositif, et un plan ou une surface, p.ex. souris 2D, boules traçantes, crayons ou palets
G06F 3/048 - Techniques d’interaction fondées sur les interfaces utilisateur graphiques [GUI]
A touch-based virtual-reality (VR) interaction system is disclosed. The VR interaction system comprises a touch sensitive apparatus configured to receive touch input from a user, a VR output device configured to display a position of the user and a virtual representation of the touch input in a VR environment coordinate system within a virtual space, a positioning unit configured to provide spatial position information of the position of the touch sensitive apparatus relative to the user, and a processing unit configured to map the spatial position information of the touch sensitive apparatus to the VR environment coordinate system. The processing unit is configured to communicate a set of VR environment coordinates of the touch sensitive apparatus to the VR output device so that the touch sensitive apparatus is displayed within the virtual space together with the virtual representation of the touch input. A related method is also disclosed.
A touch sensing apparatus is disclosed comprising a panel that defines a touch surface, a plurality of light emitters and detectors arranged along a perimeter of the panel. The light emitters are arranged to emit a respective beam of emitted light that travels above the touch surface, wherein the light detectors are arranged to receive detection light from the emitted light. The plurality of light emitters and detectors are arranged above the touch surface and are connected to a substrate extending in a direction parallel with a normal axis of a plane in which the panel extends. A method of assembling a touch sensing apparatus is also disclosed.
An optical IR touch sensing apparatus can determine, based on output signals of light detectors, a light energy value for each light path across a touch surface, and generate a transmission value for each light path based on the light energy value. A processor can operate an image reconstruction algorithm on at least part of the thus-generated transmission values and determine a position of a touching object on the touch surface, an attenuation value corresponding to the attenuation of the light resulting from the object touching the touch surface, and an occlusion compensation value for compensating the occlusion affect from other objects on the touch surface. Using these values, the processor can identify the type of object.
An optical IR touch sensing apparatus configured to determine, based on output signals of light detectors, a light energy value for each light path across a touch surface, and generate a transmission value for each light path based on the light energy value. A processor is then configured to process the transmission values to determine a region around the object reference point on the touch surface and a set of light paths intersecting the region. By performing statistical analysis of the set of light paths, characteristics of the object may be determined.
G06F 3/042 - Numériseurs, p.ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction par des moyens opto-électroniques
G06F 3/0354 - Dispositifs de pointage déplacés ou positionnés par l'utilisateur; Leurs accessoires avec détection des mouvements relatifs en deux dimensions [2D] entre le dispositif de pointage ou une partie agissante dudit dispositif, et un plan ou une surface, p.ex. souris 2D, boules traçantes, crayons ou palets
An optical IR touch sensing apparatus configured to determine, based on output signals of light detectors, a light energy value for each light path across a touch surface, and generate a transmission value for each light path based on the light energy value. A processor is then configured to process the transmission values to determine an object reference point on the touch surface where the light is attenuated or occluded by an object and determine, from a set of light paths unaffected by an object, a set of object boundary light paths comprising one or more light paths passing closest to the object reference point. The characteristics of the object may then be determined in dependence on the set of object boundary light paths.
A stylus is described for controlling a computer device. The stylus comprises at least one user control and a contact sensor configured to detect a contact between the controller device and a touch surface. The stylus is configured to: detect an activation of the user control; whilst the user control continues to be activated, detecting, using the contact sensor, whether a contact between the controller device and a touch surface has occurred and transmitting a first control signal when a contact is detected, where no contact is detected, transmitting a second control signal when the user control is deactivated.
G06F 3/0354 - Dispositifs de pointage déplacés ou positionnés par l'utilisateur; Leurs accessoires avec détection des mouvements relatifs en deux dimensions [2D] entre le dispositif de pointage ou une partie agissante dudit dispositif, et un plan ou une surface, p.ex. souris 2D, boules traçantes, crayons ou palets
G06F 3/041 - Numériseurs, p.ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction
A touch sensing apparatus is disclosed, comprising a light transmissive panel that defines a touch surface, an opposite rear surface, and panel sides extending between the touch surface and rear surface. The panel sides define a perimeter of the light transmissive panel. The touch sensing apparatus comprises a plurality of light emitters and detectors arranged along the perimeter and adjacent the panel sides, a light guide arranged along the perimeter and having a first reflective surface comprising a diffusive light scattering element. The light emitters are arranged to emit a respective beam of light onto the diffusive light scattering element so as to generate propagating light that diffusively propagates above the touch surface, wherein the light detectors are arranged to receive detection light generated as said propagating light impinges on the diffusive light scattering element, and wherein the diffusive light scattering element is arranged at least partly outside the panel sides and extending at least partly above the touch surface.
A method of controlling an interaction between a stylus and a touch sensitive device is disclosed. The stylus comprises a unique identifier and a wireless transmitter for wireless transmission of the unique identifier. The touch sensitive device comprises a wireless receiver for wirelessly receiving the unique identifier of one or more styluses. The method comprises transmitting the unique identifier from a first stylus to the touch sensitive device, determining from a database, a set of controls associated with the unique identifier, and controlling the interaction between the touch sensitive device and the user of the first stylus according to the set of controls. A touch interaction system is also disclosed.
G06F 3/0354 - Dispositifs de pointage déplacés ou positionnés par l'utilisateur; Leurs accessoires avec détection des mouvements relatifs en deux dimensions [2D] entre le dispositif de pointage ou une partie agissante dudit dispositif, et un plan ou une surface, p.ex. souris 2D, boules traçantes, crayons ou palets
G06F 3/041 - Numériseurs, p.ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction
G06F 21/32 - Authentification de l’utilisateur par données biométriques, p.ex. empreintes digitales, balayages de l’iris ou empreintes vocales
An assembly for holding and controlling curvature of a glass plate for an optical touch sensitive system is described. The assembly comprising a first frame element extending in a first plane and configured to extend at least partially around a panel; at least one second frame element extending in a second plane and forming a support portion for the plate, and at least one spacing element positioned at least partially between the support portion and the first frame element. The spacing element us configured to control a curvature of the first frame element and wherein the at least one second frame element is configured to engage the plate at the support portion, is attached to the first frame element, and is tiltable, by controlling the curvature of the first frame element with said spacing element, to control a curvature of the plate.
A method of operating an optical touch apparatus is described wherein, the optical touch apparatus comprising a panel, a plurality of emitters and a plurality of detectors arranged with respect to the panel, the plurality of detectors configured to receive light from the plurality of emitters thereby defining detection samples of light transmitted between pairs of emitters and detectors. The optical touch apparatus being further configured to operate in an ambient light evaluation mode comprising the steps of: generating a first set of samples over a first integration time and a second set of samples over a second integration time using at least one detector, and applying a filter to at least the first and second set of samples to generate a residual ambient light value indicative of ambient light noise, wherein the touch apparatus is configured to perform the following steps: operating according to the ambient light evaluation mode for a plurality of repetitions.
An assembly tool for mounting at least one component of a touch-sensing system to a panel is provided. The assembly tool comprises at least one fixture portion with a first side wall and at least a second side wall extending in a longitudinal direction of the assembly tool. The fixture portion is configured to hold the component in a predefined position therein. The first wall extends in a first transverse direction of the assembly tool and further than the second wall extends in the first transverse direction and has a guide surface configured to abut an edge of the panel and guide the position of the assembly tool relative to the edge of the panel. The assembly tool is also provided as a kit together with a carrier, and as a kit together with an applicator for applying a plastic strip to a panel.
An optical IR touch sensing apparatus configured to determine, based on output signals of light detectors, a light energy value for each light path across a touch surface, and generate a transmission value for each light path based on the light energy value. A processor is then configured to operate an image reconstruction algorithm on at least part of the thus-generated transmission values and determine a position of a touching object on the touch surface, and an attenuation value corresponding to the attenuation of the light resulting from the object touching the touch surface. Using these values, the processor is configured to identify the type of object.
An embodiment of the invention provides a stylus comprising: a deformable stylus tip, a backstop, an air gap formed between an inner surface of deformable tip and an outer surface of backstop. The inner surface of deformable tip has a hemispherical shape with a first spherical centre, the outer surface of backstop has a hemispherical shape with a second spherical centre, and the first and second spherical centres are co- located.
G06F 3/0354 - Dispositifs de pointage déplacés ou positionnés par l'utilisateur; Leurs accessoires avec détection des mouvements relatifs en deux dimensions [2D] entre le dispositif de pointage ou une partie agissante dudit dispositif, et un plan ou une surface, p.ex. souris 2D, boules traçantes, crayons ou palets
G06F 3/041 - Numériseurs, p.ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction
The invention provides an optical component for transferring light between an opto-electronic device and a light transmissive panel which defines two opposing boundary surfaces, the optical component having a shape formed from a geometric shape having a base surface, a lateral front surface and an axis, wherein the geometric shape is truncated by a plane intersecting the front surface, the base surface, and the axis, forming a back surface. The base surface is configured for mounting the optical component to the light transmissive panel and for coupling light into the light transmissive panel. The front surface being configured for coupling light from the front surface, through the base surface, and into the light transmissive panel for the light to propagate by total internal reflection within the light transmissive panel.
G02B 6/00 - OPTIQUE ÉLÉMENTS, SYSTÈMES OU APPAREILS OPTIQUES - Détails de structure de dispositions comprenant des guides de lumière et d'autres éléments optiques, p.ex. des moyens de couplage
G02B 6/42 - Couplage de guides de lumière avec des éléments opto-électroniques
G06F 3/042 - Numériseurs, p.ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction par des moyens opto-électroniques
53.
OPTICAL TOUCH SYSTEM COMPRISING MEANS FOR PROJECTING AND DETECTING LIGHT BEAMS ABOVE AND INSIDE A TRANSMISSIVE PANEL
An embodiment of the invention provides a touch sensing apparatus, comprising: a light transmissive element (10) that defines a touch surface; a set of emitters (30a) arranged around the periphery of the touch surface to emit beams of light into the light transmissive element, wherein a first portion of the beams (50) of light propagate inside the light transmissive element while illuminating the touch surface such that an object touching the touch surface causes an attenuation of the propagating light, and wherein a second portion of the beams (90) of light pass out of the light transmissive element and are reflected to travel above the touch surface, a set of light detectors (30b) arranged around the periphery of the touch surface to receive light from the set of emitters from the transmissive element and from above the touch surface, wherein each light detector is arranged to receive light from more than one emitter.
A touch system is described having a method of determining touch of one or more objects on a touch surface of a touch-sensitive apparatus, wherein the method operates in a time sequence of frames, each frame comprising the steps of: for a current frame, processing an output signal of the touch sensitive apparatus to generate one or more touch traces, each touch trace having one or more characteristics; and outputting a confirmed touch signal for each touch trace having a touch trace matching at least one of said one or more characteristics in a first number of frames preceding the current frame, wherein the first number of frames is determined in dependence on said one or more characteristics.
G06F 3/042 - Numériseurs, p.ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction par des moyens opto-électroniques
G06F 3/03 - Dispositions pour convertir sous forme codée la position ou le déplacement d'un élément
G06F 3/041 - Numériseurs, p.ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction
G06F 3/0488 - Techniques d’interaction fondées sur les interfaces utilisateur graphiques [GUI] utilisant des caractéristiques spécifiques fournies par le périphérique d’entrée, p.ex. des fonctions commandées par la rotation d’une souris à deux capteurs, ou par la nature du périphérique d’entrée, p.ex. des gestes en fonction de la pression exer utilisant un écran tactile ou une tablette numérique, p.ex. entrée de commandes par des tracés gestuels
A device implements a method for detecting contamination of an FTIR-based panel. The apparatus generates projection signals representing detection lines that have propagated on a plurality of propagation paths by total internal reflection (TIR) inside a transmissive panel such that contamination on the panel surface causes attenuation (frustration) of at least one of the projection signals. The device generates a transmission value for each detection line in the transmissive panel, and determines the presence of contamination on the surface of the panel by comparing the transmission values ac- cording to at least one of the presented comparison techniques.
A display panel (1) with a plurality of pixels (10), including a pixel of a first pixel configuration with a first sub-pixel (101), which comprises: a first OLED (B) configured to emit light at a base wavelength, and a first quantum dot structure (41, 71) disposed over the first OLED, configured to absorb light of the base wavelength so as to emit light at a first longer wavelength (R, IR). Embodiments include a touch-sensing display panel, where the first quantum dot structure is configured to emit IR light into a light guide (2) having a front surface (3) forming a touch-sensing region and an opposite rear surface (4) facing the pixels, wherein said IR emitter is optically connected to emit light into the light guide for propagation therein through total internal reflection in at least the front surface; and an IR detector (8) connected to receive propagated light from the light guide.
G09G 3/32 - Dispositions ou circuits de commande présentant un intérêt uniquement pour l'affichage utilisant des moyens de visualisation autres que les tubes à rayons cathodiques pour la présentation d'un ensemble de plusieurs caractères, p.ex. d'une page, en composant l'ensemble par combinaison d'éléments individuels disposés en matrice utilisant des sources lumineuses commandées utilisant des panneaux électroluminescents semi-conducteurs, p.ex. utilisant des diodes électroluminescentes [LED]
G06F 3/042 - Numériseurs, p.ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction par des moyens opto-électroniques
H01L 33/50 - DISPOSITIFS À SEMI-CONDUCTEURS NON COUVERTS PAR LA CLASSE - Détails caractérisés par les éléments du boîtier des corps semi-conducteurs Éléments de conversion de la longueur d'onde
A touch-sensitive apparatus operates by light frustration (FTIR) and comprises a light transmissive panel (1) that defines a front surface (5) and a rear surface (6), a light emitter optically connected to the panel (1) so as to generate light that propagates by total internal reflection inside the panel, and a light detector (3) optically connected to the panel to receive propagating light from the emitter. The emitter is a VCSEL array including a number of VCSELs (21) driven to collectively form one light emitter, and a light coupling mechanism connecting the emitter to the panel is configured to give light from a plurality of the VCSELs in the VCSEL array substantially the same spread in the panel.
H01S 5/183 - Lasers à émission de surface [lasers SE], p.ex. comportant à la fois des cavités horizontales et verticales comportant uniquement des cavités verticales, p.ex. lasers à émission de surface à cavité verticale [VCSEL]
A touch-sensing display panel (1), comprising: an LCD unit (6) including a backlight unit (28) and a plurality of image-forming pixel elements (10) arranged in a central region (12); a light emitter (7) emulated by passing light through a pixel element of a first selected portion (271) of a peripheral region (11) of the LCD unit, said emitter including a first quantum dot structure (71) connected to receive excitation light from said backlight unit so as to emit light at longer wavelength than said excitation light; a planar light guide (2) having a front surface (3) forming a touch-sensing region and an opposite rear surface (4) facing the LCD unit, said light guide being connected to receive emitter light for propagation therein through total internal reflection; a light detector (8) connected to receive light from the light guide.
A touch-sensitive apparatus operates by light frustration (FTIR) and comprises a light transmissive panel (1) that defines a front surface (5) and a rear surface (6), light emitters optically connected to the panel (1) so as to generate light that propagates by total internal reflection inside the panel, and light detectors (3) optically connected to the panel (1) so as to define a grid of propagation paths inside the panel (1) between pairs of light emitters and light detectors (3). Each of said light emitters is a VCSEL array, each said VCSEL array including a plurality of VCSELs driven in parallel to collectively form one light emitter. Preferably, each light detector (3) is optically connected to the panel (1) via an angular filter (20), tailored to pass light to the detector (3) in an angular range in which the emitters (2) operate.
H01S 5/183 - Lasers à émission de surface [lasers SE], p.ex. comportant à la fois des cavités horizontales et verticales comportant uniquement des cavités verticales, p.ex. lasers à émission de surface à cavité verticale [VCSEL]
60.
A TOUCH SENSITIVE APPARATUS WITH IMPROVED SPATIAL RESOLUTION
A touch-sensitive apparatus comprising a panel defining a touch surface; a first set of opposite and essentially parallel rows of components, and a second set of opposite and essentially parallel rows of components. The second set of opposite and parallel rows being essentially orthogonal to the first set of opposite and parallel rows. The components include emitters and detectors, each emitter being operable for propagating an energy beam across the touch surface inside the panel, and each detector being operable for detecting transmitted energy from at least one emitter. Two of the rows of the first and second set are interleaved rows each having an interleaved distribution of emitters and detectors, and the further two rows of the first and second set are base rows each having a distribution of components comprising at least 70% emitters or detectors.
A touch-sensing apparatus operates by transmitting light by total internal reflection (TIR) inside a planar light guide (1). A light projection system (10, 14) is arranged to define a grid of light propagation paths inside planar light guide (1) and generate a projection value for measurement light received on a respective light propagation path. A touch controller (24) is arranged to receive and process the projection values for determining a property (e.g. location) of objects on the planar light guide (1). The light projection system (10, 14) comprises a plurality of identical, unitary emitter-detector modules (10) that are disposed in optical contact with the planar light guide (1). Each module (10) comprises a light emitter (2) arranged to emit measurement light into the planar light guide (1), a light detector (3) arranged to receive measurement light from the planar light guide (1), and electronic circuitry (12) for generating digital measurement data (DPV) for the light propagation paths that extend to the light detector (3), wherein the digital measurement data (DPV) from the respective module (10) forms a subset of the projection values.
A touch-sensing apparatus operates by transmitting light by total internal reflection (TIR) inside a planar light guide (1). Light emitters (2) and light detectors (3) are optically connected to the planar light guide (1) to define a grid of light propagation paths inside planar light guide (1). A plurality of electronic circuitry units (12) are electrically connected to a respective component group comprising one of the light emitters (2) and one of the light detectors (3). The respective electronic circuitry unit (12) is operable to generate a set of projection values (DPV) representing the measurement light received by said one of the light detectors (3) on a subset of the light propagation paths. The respective electronic circuitry unit (12) is further arranged to optically transmit the set of projection values (DPV) to an optical signal receiver (103', 8) which is arranged to provide the set of projection values (DPV) to a touch controller (24) for determining a property of objects on the planar light guide (1).
G06F 3/0488 - Techniques d’interaction fondées sur les interfaces utilisateur graphiques [GUI] utilisant des caractéristiques spécifiques fournies par le périphérique d’entrée, p.ex. des fonctions commandées par la rotation d’une souris à deux capteurs, ou par la nature du périphérique d’entrée, p.ex. des gestes en fonction de la pression exer utilisant un écran tactile ou une tablette numérique, p.ex. entrée de commandes par des tracés gestuels
G06F 3/041 - Numériseurs, p.ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction
G06F 3/042 - Numériseurs, p.ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction par des moyens opto-électroniques
The disclosure relates to a touch sensitive system comprising a touch sensitive panel defining a touch surface, a plurality of emitters configured to emit light into the panel for propagation in the panel, a plurality of detectors configured to detect the light propagating in the panel, a plurality of distributed control devices each configured to control operation of a segment of emitters and detectors, a main control unit configured to control the distributed control devices. The touch sensitive system is configured to be set in a partial detect mode in which mode a first of the distributed control devices is configured to be active and to control a first emitter to emit light in a partial region of the panel coincident with a partial area of the touch surface. The touch sensitive system is further configured to detect a predetermined gesture on the partial area of the touch surface, generate a gesture signal indicating the predetermined gesture, and activate a feature of the touch sensitive system in accordance with the predetermined gesture. The disclosure also relates to a method in connection with the touch sensitive system.
A signal processor in a touch-sensitive apparatus generates a 2D representation of touch interaction on a touch surface by tomographic processing. The signal processor generates (50, 52) observed values for detection lines that correspond to signal propagation paths across the touch surface. The observed values correspond to sampling points in a sample space defined by first and second dimensions. The first dimension represents a rotation angle of the detection line on the touch surface, and the second dimension represents a distance of the detection line from a predetermined origin on the touch surface. The signal processor processes (54) the observed values, by interpolation in the sample space, to generate estimated values for matched sampling points in the sample space, the estimated values being processed (56) by a tomographic reconstruction function. The matched sampling points are arranged to form consecutive columns that are spaced in the first dimension in the sample space. At least a subset of the consecutive columns are non-equispaced and arranged to coincide with alignment lines that are defined by the locations of the sampling points in the two-dimensional sample space.
The disclosure relates to a printed circuit assembly, PCA, comprising: a printed circuit board, PCB; a group of components comprising an emitter, a detector and an integrated circuit, IC wherein the components are electrically bonded to the PCB, and the emitter and the detector are electrically connected to the integrated circuit via the PCB, the integrated circuit is further configured to control operation of the emitter and the detector in the same group, and a first coating covering at least one of the components in the group, wherein the first coating is made of an optically transparent material. The disclosure also relates to a method for fabricating a printed circuit assembly, and a touch sensitive system comprising the printed circuit assembly.
The disclosure relates to a coupling arrangement comprising a printed circuit assembly, PCA, comprising: a printed circuit board, PCB; a group of components comprising an emitter, a detector and an integrated circuit, IC, wherein the components are electrically bonded to the PCB, and the emitter and the detector are electrically connected to the integrated circuit via the PCB, the integrated circuit is further configured to control operation of the emitter and the detector in the same group; and a first coating covering at least one of the components in the group; wherein the coupling arrangement further comprises a volume element,wherein the first coating and the volume element are made of optically transparent materials, and wherein the volume element is arranged to at least partly cover the first coating. The disclosure also relates to a touch sensitive panel and a touch sensitive system. (Fig. 4)
A touch-sensing display panel (1), comprising a plurality of image-forming pixel elements (10); a planar light guide (2) with a first refractive index (n0), having a front surface (3) forming a touch-sensing region and an opposite rear surface (4) facing the pixel elements; a plurality of light emitters (7) arranged at a peripheral region (11) of the panel to emit light into the light guide for propagation therein through total internal reflection; a plurality of light detectors (8) disposed at the peripheral region for receiving light from the light guide; and an optical layer (21) disposed at the rear surface of the light guide to cover a plurality of the image-forming pixel elements in at least a central region (12) of the panel, wherein said optical layer is configured to reflect at least a part of the light from the emitters impinging thereon from within the light guide.
A touch-sensing display panel (1), comprising a plurality of image-forming pixel elements (10); a planar light guide (2) with a first refractive index (n0), having a front surface (3) forming a touch-sensing region and an opposite rear surface (4) facing the pixel elements; a plurality of light emitters (7) arranged at a peripheral region (11) of the panel to emit light into the light guide for propagation therein through total internal reflection; a plurality of light detectors (8) disposed at the peripheral region for receiving light from the light guide; and an optical layer (21) disposed at the rear surface of the light guide to cover a plurality of the image-forming pixel elements in at least a central region (12) of the panel, wherein said optical layer is configured to reflect at least a part of the light from the emitters impinging thereon from within the light guide.
A touch-sensing display panel (1), comprising an LCD unit (6) including a backlight (28) and a plurality of image-forming pixel elements (10) arranged in a central region (12). A planar light guide (2) with a first refractive index (n0) has a front surface (3) forming a touch-sensing region and an opposite rear surface (4) facing the LCD unit. A plurality of light emitters are emulated by passing light from the backlight through pixel elements of first selected portions (271) of a peripheral region (11) of the LCD unit into the light guide for propagation therein through total internal reflection, and a plurality of light detectors (8) are connected to receive light from the light guide.
G06F 3/042 - Numériseurs, p.ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction par des moyens opto-électroniques
G02B 6/10 - OPTIQUE ÉLÉMENTS, SYSTÈMES OU APPAREILS OPTIQUES - Détails de structure de dispositions comprenant des guides de lumière et d'autres éléments optiques, p.ex. des moyens de couplage du type guide d'ondes optiques
G02F 1/1333 - Dispositions relatives à la structure
70.
METHOD AND APPARATUS FOR DETECTING VISIBLE AMBIENT LIGHT
Method and touch-sensitive apparatus for determining the amount of visible ambient light incident on the touch-sensitive apparatus comprising a first array of light-sensing elements, the method comprising receiving light signals at a plurality of light-sensing elements in the first array; converting the light signals into electrical signals, identifying at least one type of ambient light source from the signal by comparing features in the signal with characteristic features of one or more known light sources and obtaining information related to the amount of visible ambient light incident on the panel generated by the at least one type of ambient light source in relation to the amount of ambient light registered at the plurality of light-sensing elements.
Invention principally regards a remotely controllable touch-sensing apparatus. The apparatus comprises a planar light guide, a plurality of light emitters arranged to emit light into the light guide for propagation by total internal reflection inside the light guide, and a plurality of light detectors, each being arranged to detect at least a portion of the emitted light propagating inside the light guide and at least a portion of the ambient light, said detectors being distributed along the periphery of the touch surface such that the optical plane of detection of light coincides with the plane of the light guide, at least one of said detectors being adapted to detect light emitted by an external device configured to emit light. The apparatus also comprises a processor unit configured to, ultimately, generate a digital signal containing data regarding light generated by the external device. Invention also regards a method for enabling control of a touch-sensing apparatus by an external device.
G06F 3/042 - Numériseurs, p.ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction par des moyens opto-électroniques
H04B 10/40 - Systèmes de transmission utilisant des ondes électromagnétiques autres que les ondes hertziennes, p.ex. les infrarouges, la lumière visible ou ultraviolette, ou utilisant des radiations corpusculaires, p.ex. les communications quantiques Émetteurs-récepteurs
H04B 10/50 - Systèmes de transmission utilisant des ondes électromagnétiques autres que les ondes hertziennes, p.ex. les infrarouges, la lumière visible ou ultraviolette, ou utilisant des radiations corpusculaires, p.ex. les communications quantiques Émetteurs
A touch-sensitive apparatus operates by light frustration (FTIR) and comprises a light transmissive panel (1) with a front surface (5) and a rear surface (6). Light emitters (2) and light detectors are optically coupled to the panel (1) to define a grid of light propagation paths inside the panel (1) between pairs of light emitters (2) and light detectors. A light in coupling structure comprises a diffusively reflective element (20) on the rear surface (6) and a specularly reflective element (22) on the front surface (5). Each light emitter (2) is arranged to project a beam of light onto a transmissive surface portion (24) on the rear surface (6), such that at least a portion of the beam of light enters the light transmissive panel (1) through the transmissive surface portion (24), is specularly reflected against the specularly reflective element (22) and impinges on the diffusively reflective element (20) from inside the light transmissive panel (1).
G06F 3/042 - Numériseurs, p.ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction par des moyens opto-électroniques
G02B 6/00 - OPTIQUE ÉLÉMENTS, SYSTÈMES OU APPAREILS OPTIQUES - Détails de structure de dispositions comprenant des guides de lumière et d'autres éléments optiques, p.ex. des moyens de couplage
A touch-sensitive apparatus operates by light frustration (FTIR) and comprises a light transmissive panel (1) with a front surface (5) and a rear surface (6). Light emitters (2) are optically coupled to the panel (1) at entry ports along a periphery region of the panel (1), and light detectors (3) are optically coupled to the panel (1) at exit ports along the periphery region for detecting light transmitted inside the panel (1). At least one optical sheet (20) is provided on the rear surface (6) in the periphery region. In an outcoupling installation, the light detectors (3) are arranged at the respective optical sheet (20) to receive, on a respective light-sensitive surface (3A), light from the optical sheet (20), and each light detector (3) is arranged with the light-sensitive surface (3A) essentially perpendicular to the rear surface (6). In an incoupling installation, each light emitter (2) is arranged at the respective optical sheet (20) to emit diverging light with a main direction that is essentially parallel to the rear surface (6) such that a portion of the diverging light impinges on the optical sheet (20) so as to define a respective entry port.
G06F 3/042 - Numériseurs, p.ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction par des moyens opto-électroniques
G02B 6/00 - OPTIQUE ÉLÉMENTS, SYSTÈMES OU APPAREILS OPTIQUES - Détails de structure de dispositions comprenant des guides de lumière et d'autres éléments optiques, p.ex. des moyens de couplage
74.
IMPROVEMENTS IN TIR-BASED OPTICAL TOUCH SYSTEMS OF PROJECTION-TYPE
A touch-sensitive apparatus operates by light frustration (FTIR) and comprises a light transmissive panel (1) that defines a front surface (5) and a rear surface (6), light emitters optically connected to the panel (1) so as to generate light that propagates by total internal reflection inside the panel, and light detectors (3) optically connected to the panel (1) so as to define a grid of propagation paths inside the panel (1) between pairs of light emitters and light detectors (3). Each light detector (3) is optically connected to the panel (1) via an angular filter (20). The filter (20) is applied to an outcoupling region on at least one of the front and rear surfaces (5, 6) and is configured to transmit light only within a confined range of angles with respect to the normal of the outcoupling region. The confined range extends from a lower angle limit θmin to an upper angle limit θmax. The lower angle limit θmin is equal to or larger than a critical angle θC, which is given by θC = arcsin (1/npanel), with npanel being the refractive index of the light transmissive panel (1) at the outcoupling region.
G02B 6/00 - OPTIQUE ÉLÉMENTS, SYSTÈMES OU APPAREILS OPTIQUES - Détails de structure de dispositions comprenant des guides de lumière et d'autres éléments optiques, p.ex. des moyens de couplage
G02B 5/00 - OPTIQUE ÉLÉMENTS, SYSTÈMES OU APPAREILS OPTIQUES Éléments optiques autres que les lentilles
G06F 3/03 - Dispositions pour convertir sous forme codée la position ou le déplacement d'un élément
75.
LAMINATED OPTICAL ELEMENT FOR TOUCH-SENSING SYSTEMS
A laminated optical element is provided for a touch-sensitive apparatus which operates by light frustration (FTIR), and comprises: a light-transmissive panel (1) that defines a front surface (5) and an opposite, rear surface (6); a light-coupling mechanism for light input to and output from the panel, arranged along a perimeter of a touch-sensitive region (4) of the optical element; a shielding element (70) applied at the front surface (5) over the light-coupling mechanism; and a light-transmissive sheet (60) disposed overlapping the shielding element and covering the front surface of the panel within the shielding element, wherein a lower surface of the light-transmissive sheet is in optical contact with the front surface of the panel, so as to allow light within a predetermined wavelength range to propagate between at least first and second positions of the light- coupling mechanism by total internal reflection in an upper surface of the light- transmissive sheet.
G06F 3/042 - Numériseurs, p.ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction par des moyens opto-électroniques
G02B 6/00 - OPTIQUE ÉLÉMENTS, SYSTÈMES OU APPAREILS OPTIQUES - Détails de structure de dispositions comprenant des guides de lumière et d'autres éléments optiques, p.ex. des moyens de couplage
A touch-sensitive FTIR apparatus (100), comprising a light-transmissive panel (1) having a front surface (5), an opposite rear surface (6), and a side edge (13) connecting the front and rear surfaces. A light emitter (2) is connected to input light at a first side edge portion and a detector (3) is connected to receive light output at a second side edge portion. A light-transmissive sheet (60) is laminated over the front surface of the panel and extends beyond the side edge of the panel to cover the emitter and the detector; wherein a lower surface (62) of the light-transmissive sheet is in optical contact with the front surface of the panel, so as to allow input light to propagate between the emitter and the detector through the panel and the light-transmissive sheet via total internal reflection in an upper surface (61) of the light-transmissive sheet.
The invention relates to a connection system for connection of PCBs comprising a first PCB provided with a flexible film with electrically conducting traces for electrical connection to a second PCB, wherein the flexible film is adapted to be folded along an oblique line extending from a side of the flexible film to another side of the flexible film such that when folded an end part of the flexible film is located outside a border of the first PCB and is connectable to the second PCB. The invention also relates to a method for connection of PCBs, and a method for manufacturing a system for connection of PCBs.
A device implements a method for estimating the application force of a touching object onto a touch surface in an FTIR-based projection-type touch-sensing apparatus. The apparatus generates projection signals representing radiation that has propagated on a plurality of propagation paths by total internal reflection (TIR) inside a transmissive panel beneath a touch surface of the transmissive panel such that a touching object on the touch surface causes attenuation (frustration) of at least one of the projection signals. The device generates (40) a time series of force values, which represent the application force, based on a time series of magnitude values, which represent a magnitude of a peak in two-dimensional interaction patterns generated by image reconstruction processing of the projection signals, the peak corresponding to the touching object on the touch surface. The force estimation may involve one or more corrections (41) with respect to the duration of the touching object in a low-speed state, the speed of touching object, and the size of the peak, as well as low-pass filtering (42) of the force values.
A touch-sensitive apparatus operates by light frustration (FTIR) and comprises a light transmissive panel (1) with a front surface and a rear surface. Light emitters (2) and light detectors (3) optically face the rear surface along a perimeter of a touch- sensitive region (4) on the panel (1). At least one non-imaging, diffusively transmitting optical element (40) is arranged on the rear surface (6) along the perimeter of the touch- sensitive region (4). The light emitters (2) are arranged to emit a respective beam of light onto the non-imaging optical element (40) so as to generate, by diffuse transmission, propagating light that propagates by total internal reflection inside the panel (1) across the touch-sensitive region (4), and the light detectors (3) are arranged to receive detection light generated, by diffuse transmission, as the propagating light impinges on the non-imaging optical element (40), so as to define a grid of propagation paths (D) across the touch-sensitive region (4) between pairs of light emitters (2) and light detectors (3).
A touch-sensitive apparatus operates by light frustration (FTIR) and comprises a light transmissive panel (1) with a front surface and a rear surface. Light emitters (2) and light detectors (3) optically face the rear surface along a perimeter of a touch-sensitive region (4) on the panel (1). At least one diffusively reflecting element (40) is arranged on the front surface (5) along the perimeter of the touch-sensitive region (4). The light emitters (2) are arranged to emit a respective beam of light onto the diffusively reflecting element (40), so as to generate propagating light that propagates by total internal reflection inside the panel (1) across the touch-sensitive region (4), and the light detectors (3) are arranged to receive detection light generated as the propagating light impinges on the diffusively reflecting element (40), so as to define a grid of propagation paths (D) across the touch-sensitive region (4) between pairs of light emitters (2) and light detectors (3).
A touch-sensitive apparatus is configured to define a touch surface on a panel by propagating diverging energy beams (e.g. of radiation) across the touch surface inside the panel. Two rows (20A, 20B) of components (2, 3) of a first type that emits energy as a diverging beam and a second type that detects energy are functionally connected to the panel at opposite ends of the touch surface. The rows (20A, 20B) are defined by consecutive component blocks (B) that each contain only components (2, 3) of one type and are defined by type and number of included components. Each row (20A, 20B) comprises a respective sequence (S) of two component blocks (B) of different types and is defined by systematically repeating the sequence (S) along the respective opposite end. To achieve an improved spatial resolution of the touch-sensitive apparatus for a given number of components, at least one of the sequences (S) is selected to consist of two component blocks (B) with different number of components, and the sequences (S) are selected such that at least one component block (B) differs between the sequences (S).
A touch-sensitive apparatus is configured to define a touch surface on a panel by propagating diverging energy beams across the touch surface inside the panel. Two rows (20A, 20B) of components (2, 3) of a first type that emits energy as a diverging beam and a second type that detects energy are functionally connected to the panel at opposite ends of the touch surface. The rows (20A, 20B) are defined by consecutive component blocks (B) that each contain only components (2, 3) of one type and are defined by type and number of included components. Each row (20A, 20B) is defined to have consecutive component blocks (B) of alternating type. To achieve an improved spatial resolution of the touch-sensitive apparatus for a given number of components, at least one of the rows (20A, 20B) is designed to include at least three different component blocks (B) which differ with respect to at least one of number and type.
A touch-sensitive apparatus is configured to propagate energy inside a panel (1) so as to define a grid of transmission paths across a touch surface (4) of the panel (1). The apparatus comprises a first subset of components on a first end of the touch surface (4), and a second subset of components on a second end which is opposite to and parallel with the first end. The components include emitters and detectors, each emitter being operable for propagating a diverging energy beam (e.g. radiation) across the touch surface (4) inside the panel (1), and each detector being operable for detecting transmitted energy from at least two emitters. The components in at least one of the first and second subsets are systematically arranged in spatially separate groups along at least one of the first and second ends, so as to achieve a reduced spacing and/or an increased uniformity of the transmission paths along a center line between the first and second ends compared to an equidistant arrangement of all components.
A signal processor implements a technique for detecting objects on a panel which transmits signals inside the panel such that the objects are allowed to interact with (e.g. attenuate) the signals by contact with a touch surface of the panel. The signal processor operates to define cells that have a given location on the touch surface and are associated with a respective set of intersecting paths for the signals across the touch surface. The signal processor operates to obtain (90) an output signal from a signal detection arrangement that measures a signal property for each path; process (91) the output signal to obtain an interaction value for each path; and generate (93-95') a cell value of a selected cell among the cells as either a robust measure of central tendency (e.g. a median) or a minimum/maximum among the interaction values for the intersecting paths. The signal processor determines (97) presence or absence of an object in the selected cell based on the cell value.
A signal processor implements a technique for detecting objects on a panel which transmits signals inside the panel such that the objects are allowed to interact with (e.g. attenuate) the signals by contact with a touch surface of the panel. The signal processor operates to define cells that have a given location on the touch surface and are associated with a respective set of intersecting paths for the signals across the touch surface. The signal processor operates to obtain (70) an output signal from a signal detection arrangement that measures a signal property for each path; process (71) the output signal to obtain an interaction value for each path; and determine (73-75) a touch status of a selected cell among the cells by analyzing the distribution of interaction values for at least part of the intersecting paths. The touch status indicates presence or absence of one of the objects in the selected cell.
Touch sensitivity is enabled using a touch system that comprises a panel configured to conduct signals, e.g. by TIR, along detection lines across a touch surface. A signal processor operates to generate data samples indicative of transmitted signal energy on parallel detection lines at a number of different angles across the touch surface; process the data samples for generation of interpolated Fourier coefficients (ƒ) at grid points in a regular grid in a Fourier domain; and operate a two-dimensional inverse Fourier transform on the interpolated Fourier coefficients (ƒ) so as to generate an interaction pattern for the touch surface. The interpolated Fourier coefficients (ƒ) are generated sequentially for individual groups of grid points. Each individual group comprises grid points that have equal distance to an origin in the regular grid, e.g. grid points that are mapped onto each other by one or more lines of symmetry (L1-L4) in the regular grid. The group-based processing may improve processing speed and/or reduce the need for data storage.
Touch sensitivity is enabled using a touch system that comprises a panel configured to conduct signals, e.g. by TIR, along detection lines across a rectangular touch surface with first and second spatial dimensions. A signal processor operates (104) to transform energy values for the detection lines into Fourier coefficients arranged as data points on a regular grid defined by first and second frequency dimensions. To generate an interaction pattern for the touch surface, the signal processor operates (106) a first 1D inverse FFT on the data points with respect to the second frequency dimension, so as to generate first values transformed into the second spatial dimension, and operates (108) a second 1D inverse FFT on a selected subset of the first values with respect to the first frequency dimension to generate second values that represent the interaction pattern. The selected subset is defined by the data points that fall within an extent of the touch surface in the second spatial dimension, thereby reducing the total number of inverse FFT operations.
G06F 3/0488 - Techniques d’interaction fondées sur les interfaces utilisateur graphiques [GUI] utilisant des caractéristiques spécifiques fournies par le périphérique d’entrée, p.ex. des fonctions commandées par la rotation d’une souris à deux capteurs, ou par la nature du périphérique d’entrée, p.ex. des gestes en fonction de la pression exer utilisant un écran tactile ou une tablette numérique, p.ex. entrée de commandes par des tracés gestuels
G06F 3/042 - Numériseurs, p.ex. pour des écrans ou des pavés tactiles, caractérisés par les moyens de transduction par des moyens opto-électroniques
G06T 3/40 - Changement d'échelle d'une image entière ou d'une partie d'image
88.
TOUCH DETERMINATION WITH IMPROVED DETECTION OF WEAK INTERACTIONS
Touch sensitivity is enabled using a touch system that comprises a panel configured to conduct signals, e.g. by TIR, along detection lines across a touch surface. A signal processor operates to obtain (52) observed values for the detection lines, and identify (54C) an interaction pattern on the touch surface as a solution to an optimization function that comprises an aggregation of differences, for each detection line, between the observed value and a projected value, which is given by a projection function that defines a functional relation between the interaction pattern and the projected value for each detection line. The signal processor implements a normalization to ensure that the interaction pattern indicates weak touches even in the presence of strong touches. The normalization involves computing (54A) a respective normalization value for each of the differences as a function of the observed value for the respective detection line; and applying (54B) the respective normalization value so as to normalize the respective difference in the optimization function.
Touch sensitivity is enabled using a touch system that comprises a panel configured to conduct signals, e.g. by TIR, along detection lines across a touch surface. A signal processor operates in a sequence of repetitions to: generate (70, 71) data samples that represent detected signal energy on the actual detection lines; generate (72, 74) based on the data samples, an interpolated sinogram comprising interpolation samples that represent fictitious detection lines which have a desired location on the touch surface; and reconstruct (75) a signal interaction pattern for the touch surface based on the interpolated sinogram. The signal processor implements an error correction (73) to counteract the influence of a change in validity status for a data sample among the data samples, by identifying interpolation samples affected by the change in validity status, and by setting each identified interpolation sample to a value that maintains a relative signal transmission of the fictitious detection line from a former repetition.
A device implements a data processing method for an optical FTIR-based touch system. The touch system defines detection lines across a surface portion of a panel by propagating light inside the panel from a plurality of incoupling points to a plurality of outcoupling points, such that each location on the surface portion is illuminated by incident light rays. At least one light detector is coupled to the outcoupling points to generate an output signal. The device obtains (50) signal values for the detection lines from the output signal and processes (52) the signal values to at least partly compensate for variations in the apparent interaction among the subset of detection lines that interact with an object on the surface portion. The device uses compensation data which is obtained to at least partly represent the variations that are caused by differences in incident power distribution among the subset of detection lines, the incident power distribution being a distribution of power among the incident light rays on the respective detection line with respect to a normal direction of the surface portion.
A device implements a method of tracking objects on a touch surface of an FTIR based touch- sensitive apparatus. An interaction map is generated (52) that indicates local changes in interaction on the touch surface. The interaction map is processed (53) for identification of positive and negative peaks that represent a locally increased and decreased interaction in the interaction map, respectively. To suppress the impact of interferences, a dedicated first heuristic and/or second heuristic is applied (54) to identify potentially false peaks among the positive peaks. The first heuristic designates a positive peak as a potentially false peak when the positive peak is deemed to be associated with one or more of the negative peaks. The second heuristic designates a positive peak as a potentially false peak when the positive peak is deemed to be located along one of the movement trajectories. Movement trajectories of all objects deemed to exist on the touch surface at a preceding time point are then updated (56) while taking the potentially false peaks into account.
A device implements a method of tracking objects on a touch surface of an FTIR based touch-sensitive apparatus. The method repeatedly operates to generate (50-52) an interaction pattern that indicates local changes in interaction on the touch surface, identify (53) apparent peaks in the interaction pattern, and update (54) existing movement trajectories based on the apparent peaks. An error suppression process (56) is executed at least intermittently in the method to process the apparent peaks and/or the existing movement trajectories to identify implicated trajectories with a potential tracking problem, define two or more movement propositions for each implicated trajectory, and cause an evaluation of the movement propositions in one or more subsequent repetitions of the method. The error suppression process improves tracking by postponing the final decision on how to track the object of the implicated trajectory until more information is available. It also allows the origin of the tracking problem to subside and/or the object to move away from an area on the touch surface that exhibits interferences.
In a touch-sensitive apparatus, a panel conducts signals, e.g. light, on actual detection lines that extend across a surface portion of the panel between pairs of incoupling and outcoupling points. Objects touching the surface portion attenuate the transmitted signals. A data processor processes (40) an output signal from a detector coupled to the outcoupling points, to generate a set of data samples indicative of detected energy for the actual detection lines. The set of data samples is further processed (42) to generate a set of matched samples indicative of estimated detected energy for fictitious detection lines that extend across the surface portion in parallel groups at a plurality of different angles. The individual spacing between the fictitious detection lines in each group and the individual difference in angle between said groups are selected such that the set of matched samples transforms to Fourier coefficients arranged as data points on a pseudo-polar grid in a Fourier domain. The set of matched samples is processed (44) by tomographic reconstruction to generate a two-dimensional distribution of an interaction parameter within the surface portion.
Multi-touch sensitivity is enabled using a touch system that comprises a panel configured to conduct signals, e.g. by FTIR, from a plurality of incoupling points to a plurality of outcoupling points, thereby defining detection lines across the panel between pairs of incoupling and outcoupling points. A signal processor operates in a repeating sequence of iterations to obtain (50) a current signal value for each detection line, and generate (53, 53') a first interaction pattern and a second interaction pattern as a function of the current signal values, such that the first and second interaction patterns are reconstructed two-dimensional distributions of local interaction with the conducted signals across the surface portion, and represent changes in interaction on different time scales. Thereby, the movement of an object will affect how it is represented in each of the first and second interaction patterns. Touch detection may be improved by proper selection of the time scales and combined analysis (56) of the first and second interaction patterns.
Touch sensitivity is enabled using a touch system that comprises a panel configured to conduct signals, e.g. by TIR, from a plurality of incoupling points to a plurality of outcoupling points, thereby defining detection lines across a touch surface between pairs of incoupling and outcoupling points. A signal processor operates in a repeating sequence of iterations to: calculate (22) change values for the detection lines representative of signal changes between the current and a previous iteration, and operate (23) a reconstruction algorithm on the change values to determine a differential interaction pattern across the touch surface. The signal processor also operates to update (24) a tracking pattern as a function of the differential interaction pattern, and generate (25) a current offset pattern based on the tracking pattern. The offset pattern is generated to represent current touch interaction on the touch surface and is supplied for identification (26) of touches on the surface portion. The tracking pattern may represent accumulated interaction across the touch surface, and may either include or be at least partly compensated for the influence of contaminations on the touch surface.
A coupling element (14) for use in a touch-sensitive apparatus is arranged to transfer light between an electro-optical device (2) and a panel (4) for light transmission. The electro-optical device (2) is an emitter or a detector and has an operative solid angle given by orthogonal device divergence angles. The coupling element (14) is an optical component with a first light transmission surface (21) for facing the electro-optical device (2), and a second light transmission surface (22) for mounting on the panel (4). The coupling element (14) has an optical structure (23) that directs the light between the first and second light transmission surfaces (21, 22) by one or more reflections while expanding one device divergence angle (αx) into a component divergence angle at the second light transmission surface (22). Thereby, the component divergence angle defines a divergence (φp) in the plane of the panel (4) with respect to light propagating by internal reflections inside the light transmissive panel (4).
A device for processing data from a touch sensitive apparatus is provided. The apparatus comprises a light transmitting panel with a touch surface and an opposed back surface; an illumination arrangement configured to introduce light into the panel for propagation by internal reflection between the touch surface and the back surface; a light detection arrangement configured to receive the light after propagation in the panel. A processor unit in the device operates to: obtain (S4) a monitored signal which is functionally dependent on transmitted light detected by the light detection arrangement; reconstruct (S5), based on the monitored signal,a two-dimensional attenuation field representing an attenuation of the transmitted light on the touch surface; calculate (S6) an expected monitored signal based on the reconstructed attenuation field;and compare (S7) the expected monitored signal with the monitored signal in order to determine a reduced performance of the apparatus.
A multi-touch system comprises a panel for conducting signals, e.g. by FTIR, from incoupling points to outcoupling points, to define detection lines across the panel. A signal processor operates in a repeating sequence of iterations to obtain (20) an output signal from a detector coupled to the outcoupling points and generate (22') a formatted signal value for each detection line, and operate (24) a reconstruction algorithm on the formatted signal values to determine an interaction pattern on the panel. The signal processor also, at least intermittently in the sequence of iterations, operates (22") compensation data on the formatted signal values to compensate for contaminations on the panel, and calculates (28") updated compensation data based on an interference pattern determined as a function of the interaction pattern, the interference pattern being a 2D representation of contamination-induced signal interferences. The influence of contaminations in the interaction pattern is thereby suppressed.
A touch-sensitive apparatus comprises a light transmissive panel (1), an illumination arrangement and a detection arrangement. The illumination arrangement is configured to couple light into the panel (1) via an incoupling site (5B) such that the light propagates by total internal reflection (TIR) in opposite top and bottom surfaces (4, 5) of the panel and such that an object touching the top or bottom surface (4, 5) causes a change in the propagating light. The detection arrangement comprises a light detector arranged to detect the change in the propagating light. A compact and robust incoupling site (5B) is defined by a sheet-like micro-structured surface portion (22) which is fixedly arranged on one of the top and bottom surfaces (4, 5) and configured to transmit light having an angle of incidence that enables light propagation by TIR inside the panel (1). The surface portion (22) may be integrated in the panel or implemented by a thin and flexible film (20) of light transmissive plastic material, formed with the micro-structured surface portion and adapted for attachment to the top or bottom surface (4, 5).
Multi-touch sensitivity is enabled using a touch-sensitive apparatus (100) that comprises a panel (4) for conducting signals from a plurality of incoupling points to a plurality of outcoupling points, thereby defining detection lines (D) between pairs of incoupling and outcoupling points. Signal generators (2) are coupled to the incoupling points to generate the signals, and signal detectors (3) are coupled to the outcoupling points to generate an output signal which is indicative of one or more touches present on the surface portion (1). A signal processor (10) obtains the output signal which, if converted into a set of data samples of a given input format, enables a predetermined reconstruction algorithm to determine an actual interaction pattern on the surface portion (1). The signal processor (10) generates, based on the output signal, a modified set of data samples in the given input format; and operates the predetermined reconstruction algorithm on the modified set of data samples so as to determine a modified interaction pattern on the surface portion (1).The modified interaction pattern may represent an enhancement of weakly interacting touches over strongly interacting touches and/or reconstruction artifacts in the actual interaction pattern.
brevets
