公开(公告)号：WO2014042576A3

公开(公告)日：2014-05-08

申请号：PCT/SE2013051044

申请日：2013-09-09

Applicant: FLATFROG LAB AB

Inventor： JOHANSSON ANDREAS ,  OHLSSON NICKLAS

IPC: G06F3/041 ,  G06F3/042

CPC classification number: G06F3/0421 ,  G06F3/0414 ,  G06F3/0418 ,  G06F2203/04109

Abstract: 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.

Abstract translation: 一种装置实现了一种用于在基于FTIR的投影型触摸感测装置中估计触摸物体在触摸表面上的施加力的方法。 该装置产生投影信号，该投影信号表示通过在透射面板的触摸表面下方的透射板内部的全内反射（TIR）在多个传播路径上传播的辐射，使得触摸表面上的触摸物体导致衰减（挫败） 至少一个投影信号。 该装置基于表示通过投影信号的图像重建处理产生的二维交互图案中的峰值的大小的幅度值的时间序列，生成（40）表示施加力的时间序列的力值 ，对应于触摸面上的触摸物体的峰值。 力估计可以涉及在低速状态下的触摸物体的持续时间，触摸物体的速度和峰的大小以及低通滤波（42）中的一个或多个校正（41） ）的力值。

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。

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.