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    OBJECT DETECTION IN TOUCH SYSTEMS
    1.
    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.

    EFFICIENT TOMOGRAPHIC PROCESSING FOR TOUCH DETERMINATION
    2.
    发明公开
    EFFICIENT TOMOGRAPHIC PROCESSING FOR TOUCH DETERMINATION 审中-公开
    有效的静脉造影处理触摸确定

    公开(公告)号：EP2823388A4

    公开(公告)日：2015-10-21

    申请号：EP13757307

    申请日：2013-03-07

    Applicant: FLATFROG LAB AB

    Inventor： CHRISTIANSSON TOMAS ,  BJÖRKLUND ANDREAS ,  OHLSSON NICKLAS

    IPC: G06F3/0488 ,  G06F3/042 ,  G06T3/40

    CPC classification number: G06F3/042 ,  G06F3/0416 ,  G06F3/0421 ,  G06F2203/04109 ,  H04M1/72563

    Abstract: 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 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 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 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.

    EFFICIENT TOMOGRAPHIC PROCESSING FOR TOUCH DETERMINATION
    4.
    发明公开
    EFFICIENT TOMOGRAPHIC PROCESSING FOR TOUCH DETERMINATION 审中-公开
    EFFIZIENTE TOMOGRAPHISCHE VERARBEITUNG ZURBERÜHRUNGSBESTIMMUNG

    公开(公告)号：EP2823382A4

    公开(公告)日：2015-10-21

    申请号：EP13757203

    申请日：2013-03-07

    Applicant: FLATFROG LAB AB

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

    IPC: G06F3/042 ,  G06F3/041 ,  G06F17/14

    CPC classification number: G06F3/046 ,  G06F3/0416 ,  G06F3/0421 ,  G06F2203/04109

    Abstract: 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 at grid points in a regular grid in a Fourier domain; and operate a two-dimensional inverse Fourier transform on the interpolated Fourier coefficients so as to generate an interaction pattern for the touch surface. The interpolated Fourier coefficients 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 ore lines of symmetry in the regular grid. The group-based processing may improve processing speed and/or reduce the need for data storage.

    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触敏。 通过TIR，沿着穿过触摸表面的检测线。 信号处理器操作以在穿过触摸表面的多个不同角度上产生指示平行检测线上发送的信号能量的数据样本; 处理用于在傅立叶域中的规则网格中的网格点处产生内插傅里叶系数的数据样本; 并对内插的傅里叶系数进行二维傅里叶逆变换，以生成触摸面的相互作用图案。 对于各个网格点组，依次生成内插傅里叶系数。 每个单独的组包括与规则网格中的原点具有相等距离的网格点，例如。 在正常网格中通过对称线对齐的网格点。 基于组的处理可以提高处理速度和/或减少对数据存储的需要。

    PERFORMANCE MONITORING AND CORRECTION IN A TOUCH-SENSITIVE APPARATUS
    5.
    发明公开
    PERFORMANCE MONITORING AND CORRECTION IN A TOUCH-SENSITIVE APPARATUS 审中-公开
    LEISTUNGSÜBERWACHUNGUND-KORREKTUR IN EINERBERÜHRUNGSEMPFINDLICHENVORRICHTUNG

    公开(公告)号：EP2810146A4

    公开(公告)日：2015-09-16

    申请号：EP13744212

    申请日：2013-01-29

    Applicant: FLATFROG LAB AB

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

    IPC: G06F3/042

    CPC classification number: G06F3/0418 ,  G06F3/042 ,  G06F3/0421 ,  G06F3/0428 ,  G06F3/047 ,  G06F2203/04109

    Abstract: 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 data samples that represent detected signal energy on the actual detection lines; generate 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 a signal interaction pattern for the touch surface based on the interpolated sinogram. The signal processor implements an error correction 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.

    Abstract translation: 使用触摸系统启用触摸灵敏度，该触摸系统包括被配置为沿着触摸表面的检测线传导信号的面板。 信号处理器以重复序列操作，以产生表示实际检测线上检测到的信号能量的数据样本; 基于所述数据样本生成内插正弦图，其包括表示在所述触摸表面上具有期望位置的虚拟检测线的插值样本; 并且基于插值的正弦图来重建用于触摸表面的信号交互模式。 信号处理器通过识别受有效状态变化影响的插值样本，并通过将每个识别的插值样本设置为维持的值，来实现纠错以抵消数据样本中数据样本的有效性状态变化的影响 虚拟检测线从前者重复的相对信号传输。

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