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    Detecting the locations of a plurality of objects on a touch surface
    31.
    发明专利
    Detecting the locations of a plurality of objects on a touch surface 未知

    公开(公告)号：AU2009272921A1

    公开(公告)日：2010-01-21

    申请号：AU2009272921

    申请日：2009-06-22

    Applicant: FLATFROG LAB AB

    Inventor： CHRISTIANSSON TOMAS ,  WASSVIK OLA

    IPC: G06F3/042

    Abstract: An apparatus is controlled to detect locations of a plurality of objects on a touch surface of a panel. An input scanner arrangement introduces at least three beams of radiation into the panel for propagation by internal reflection, and sweeps the beams inside the panel across a sensing area, preferably in at least two different principal directions. At least one radiation detector is arranged to receive the beams from the input scanner arrangement while they are swept across the sensing area. A data processor is connected to the radiation detector(s) and operated to identify the locations based on an attenuation of the beams caused by the objects touching the touch surface within the sensing area, the attenuation being identifiable from an output signal of the radiation detector(s). Each output signal may be further processed to generate a transmission signal, by dividing the output signal by a background signal which represents the output signal without any object on the touch surface.

    Determining touch data for one or more objects on a touch surface
    32.
    发明专利
    Determining touch data for one or more objects on a touch surface 未知

    公开(公告)号：AU2010308596A1

    公开(公告)日：2012-06-07

    申请号：AU2010308596

    申请日：2010-10-13

    Applicant: FLATFROG LAB AB

    Inventor： CHRISTIANSSON TOMAS ,  BRYBORN KRUS MATTIAS

    IPC: G06F3/042

    Abstract: A touch-sensing apparatus comprises a light transmissive panel, in which sheets of light are propagated by internal reflection between a touch surface and an opposite surface from an incoupling site to an outcoupling site. The touch-sensing apparatus is configured such that objects touching the touch surface cause a local attenuation of at least two sheets of light. A light sensor arrangement is optically connected to the outcoupling site to measure transmitted light energy. A data processor is connected to the light sensor arrangement and configured to execute a touch determination process. The process operates on at least oneprojection signal which is indicative of a spatial distribution of light within the outcoupling site. In the process, the projection signal(s) is/are processed for identification of signal profiles representing the attenuation (step 202). The signal profiles are used for identifying one or more candidate touch areas on the touch surface (step 1206´). The projection signal(s) is/are then processed to reconstruct a two-dimensional distribution of signal values locally within the one or more 1 candidate touch areas (step 1207), whereupon touch data for the or each object is determined by processing the reconstructed signal values within the candidate touch areas (step 1208).

    DETECTING THE LOCATIONS OF A PLURALITY OF OBJECTS ON A TOUCH SURFACE
    36.
    发明专利
    DETECTING THE LOCATIONS OF A PLURALITY OF OBJECTS ON A TOUCH SURFACE 未知

    公开(公告)号：CA2728030A1

    公开(公告)日：2010-01-21

    申请号：CA2728030

    申请日：2009-06-22

    Applicant: FLATFROG LAB AB

    Inventor： WASSVIK OLA ,  CHRISTIANSSON TOMAS

    IPC: G06F3/042

    Abstract: An apparatus is controlled to detect locations of a plurality of objects on a touch surface of a panel (1). An input scanner arrangement introduces at least three beams (B1- B6) of radiation into the panel (1) for propagation by internal reflection, and sweeps the beams (B1-B6) inside the panel across a sensing area, preferably in at least two different principal directions (R1, R2). At least one radiation detector is arranged to receive the beams (B1-B6) from the input scanner arrangement while they are swept across the sensing area. A data processor is connected to the radiation detector(s) and operated to identify the locations based on an attenuation of the beams (B1-B6) caused by the objects touching the touch surface within the sensing area, the attenuation being identifiable from an output signal of the radiation detector(s). Each output signal may be further processed to generate a transmission signal, by dividing the output signal by a background signal which represents the output signal without any object on the touch surface.

    OBJECT DETECTION IN TOUCH SYSTEMS
    38.
    发明公开
    OBJECT DETECTION IN TOUCH SYSTEMS 审中-公开
    物体识别触摸系统

    公开(公告)号：EP2845080A4

    公开(公告)日：2015-12-16

    申请号：EP13784425

    申请日：2013-04-29

    Applicant: FLATFROG LAB AB

    Inventor： CHRISTIANSSON TOMAS ,  OHLSSON NICKLAS ,  BJÖRKLUND ANDREAS ,  WALLANDER MATS PETTER

    IPC: G06F3/042 ,  G06F3/041

    CPC classification number: G06F3/041 ,  G06F3/0416 ,  G06F3/0421 ,  G06F2203/04104 ,  G06F2203/04109

    Abstract: 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.

    IMPROVED MULTI-TOUCH DETECTION IN A TOUCH SYSTEM
    40.
    发明公开
    IMPROVED MULTI-TOUCH DETECTION IN A TOUCH SYSTEM 有权
    改进的多触摸优先的触摸系统

    公开(公告)号：EP2766797A4

    公开(公告)日：2015-04-29

    申请号：EP12839672

    申请日：2012-10-08

    Applicant: FLATFROG LAB AB

    Inventor： CHRISTIANSSON TOMAS ,  WALLANDER MATS PETTER ,  JUHLIN PETER ,  JOHANSSON ANDREAS ,  WALL HENRIK ,  OHLSSON NICKLAS

    IPC: G06F3/042 ,  G06F3/041

    CPC classification number: G06F3/041 ,  G06F3/0418 ,  G06F3/0421 ,  G06F2203/04104 ,  G06F2203/04109

    Abstract: 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.

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