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    IMPROVED MULTI-TOUCH DETECTION IN A TOUCH SYSTEM
    1.
    发明申请
    IMPROVED MULTI-TOUCH DETECTION IN A TOUCH SYSTEM 审中-公开
    改进触摸系统中的多触摸检测

    公开(公告)号：WO2013055282A2

    公开(公告)日：2013-04-18

    申请号：PCT/SE2012051073

    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

    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. Touch detection may be improved by proper selection of the time scales and combined analysis (56) of the first and second interaction patterns.

    Abstract translation: 使用包括被配置为传导信号的面板的触摸系统来启用多点触敏。 通过FTIR，从多个插入点到多个输出耦合点，由此限定跨耦合和输出耦合点对之间的面板上的检测线。 信号处理器以重复的迭代序列操作以获得（50）每个检测线的当前信号值，并且生成作为当前信号值的函数的第一交互模式和第二交互模式（53,53'）， 使得第一和第二相互作用模式是通过表面部分与传导信号的局部交互的重建二维分布，并且表示不同时间尺度上的交互的变化。 因此，对象的移动将影响如何在第一和第二交互模式中的每一个中表示它。 可以通过适当地选择第一和第二相互作用模式的时间尺度和组合分析（56）来改善触摸检测。

    A TOUCH SENSING APPARATUS AND METHOD OF OPERATING THE SAME
    2.
    发明申请
    A TOUCH SENSING APPARATUS AND METHOD OF OPERATING THE SAME 审中-公开
    触摸感应装置及其操作方法

    公开(公告)号：WO2010064983A3

    公开(公告)日：2010-08-05

    申请号：PCT/SE2009051364

    申请日：2009-12-02

    Applicant: FLATFROG LAB AB ,  FAAHRAEUS CHRISTER ,  WALL HENRIK ,  WASSVIK OLA ,  CHRISTIANSSON TOMAS

    Inventor： FAAHRAEUS CHRISTER ,  WALL HENRIK ,  WASSVIK OLA ,  CHRISTIANSSON TOMAS

    IPC: G06F3/042

    CPC classification number: G06F3/0325 ,  G06F3/0421 ,  G06F3/0428 ,  G06F2203/04104 ,  G06F2203/04109

    Abstract: A touch sensing apparatus is controlled to determine the position of one or more objects (7) that interact with a touch surface (1). The apparatus includes a group of emitters (2) arranged to emit light to illuminate at least part of the touch surface (1), a light detector (4) arranged to receive light from the group of emitters (2), and a processing element (7). Each emitter (2) is controlled to transmit a code by way of the emitted light such that the code identifies the respective emitter (2). The codes may at least partly be transmitted concurrently. The codes may be selected such that a value of an autocorrelation of each code is significantly higher than a value of a cross-correlation between any two codes of different emitters (2). The processing element processes an output signal from the light detector (4) to separate the light received from the individual emitters (2) based on the transmitted codes, and to determine the position of the object/objects (7) based on the light received from the individual emitters (2), e.g. using triangulation or image reconstruction such as an algorithm for transmission tomography.

    Abstract translation: 控制触摸感测装置以确定与触摸表面（1）相互作用的一个或多个物体（7）的位置。 该设备包括：一组发射器（2），被布置为发射光以照亮触摸表面（1）的至少一部分;光检测器（4），被布置为接收来自该组发射器（2）的光;以及处理元件 （7）。 控制每个发射器（2）通过发射的光传输代码，使得代码识别相应的发射器（2）。 代码可以至少部分地同时传输。 代码可以被选择为使得每个代码的自相关值明显高于不同发射器（2）的任何两个代码之间的互相关的值。 处理元件处理来自光检测器（4）的输出信号，以基于所发送的代码分离从各个发射器（2）接收的光，并且基于所接收的光来确定物体/物体（7）的位置 来自各个发射器（2），例如， 使用三角测量或图像重建，例如透射层析成像算法。

    A TOUCH SENSING APPARATUS AND METHOD OF OPERATING THE SAME
    3.
    发明专利
    A TOUCH SENSING APPARATUS AND METHOD OF OPERATING THE SAME 未知

    公开(公告)号：CA2745422A1

    公开(公告)日：2010-06-10

    申请号：CA2745422

    申请日：2009-12-02

    Applicant: FLATFROG LAB AB

    Inventor： FAHRAEUS CHRISTER ,  WALL HENRIK ,  WASSVIK OLA ,  CHRISTIANSSON TOMAS

    IPC: G06F3/042

    Abstract: A touch sensing apparatus is controlled to determine the position of one or more objects (7) that interact with a touch surface (1). The apparatus includes a group of emitters (2) arranged to emit light to illuminate at least part of the touch surface (1), a light detector (4) arranged to receive light from the group of emitters (2), and a processing element (7). Each emitter (2) is controlled to transmit a code by way of the emitted light such that the code identifies the respective emitter (2). The codes may at least partly be transmitted concurrently. The codes may be selected such that a value of an autocorrelation of each code is significantly higher than a value of a cross-correlation between any two codes of different emitters (2). The processing element processes an output signal from the light detector (4) to separate the light received from the individual emitters (2) based on the transmitted codes, and to determine the position of the object/objects (7) based on the light received from the individual emitters (2), e.g. using triangulation or image reconstruction such as an algorithm for transmission tomography.

    IMPROVED MULTI-TOUCH DETECTION IN A TOUCH SYSTEM
    8.
    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.

    TOUCH SURFACE WITH A COMPENSATED SIGNAL PROFILE
    10.
    发明公开
    TOUCH SURFACE WITH A COMPENSATED SIGNAL PROFILE 审中-公开
    TOUCH表面补偿信号轮廓

    公开(公告)号：EP2473905A4

    公开(公告)日：2014-07-09

    申请号：EP10814030

    申请日：2010-09-01

    Applicant: FLATFROG LAB AB

    Inventor： FÅHRAEUS CHRISTER ,  CHRISTIANSSON TOMAS ,  WALL HENRIK ,  WASSVIK OLA

    IPC: G06F3/042

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

    Abstract: An apparatus, method and computer-readable medium for determining a location of at least one object on a touch surface of a light transmissive panel. The method comprises the steps of: introducing light into the panel for propagation by internal reflection between the touch surface and an opposite surface; receiving the light propagating in the panel; and iteratively i) determining a current signal profile of light received by the light detection arrangement, ii) updating, when a condition is met, a background signal profile of light received by the light detection arrangement, iii) calculating a current compensated signal profile as a function of the background signal profile and the current signal profile and iv) determining, when the object touches the touch surface and thereby attenuates the light propagating in the panel, the location as a function of the compensated signal profile.

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