公开(公告)号：WO2013115710A3

公开(公告)日：2013-10-31

申请号：PCT/SE2013050064

申请日：2013-01-29

Applicant: FLATFROG LAB AB

Inventor： CHRISTIANSSON TOMAS ,  BJOERKLUND 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 (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.

Abstract translation: 使用包括配置为传导信号的面板的触摸系统启用触摸灵敏度，例如， 通过TIR，沿触摸表面的检测线。 信号处理器以重复序列操作以：产生（70,71）数据样本，其表示实际检测线上的检测到的信号能量; 基于所述数据样本生成（72,74）包括内插样本的内插正弦图，所述内插样本表示在所述触摸表面上具有期望位置的虚构检测线; 并且基于内插正弦图重建（75）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性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一个值来实现纠正（73）以抵消数据样本之间的数据样本的有效性状态变化的影响 保持来自前一次重复的虚拟检测线的相对信号传输的值。

公开(公告)号：WO2013126005A3

公开(公告)日：2013-12-19

申请号：PCT/SE2013050137

申请日：2013-02-19

Applicant: FLATFROG LAB AB

Inventor： CHRISTIANSSON TOMAS ,  OHLSSON NICKLAS

IPC: G06F3/041

CPC classification number: G06F3/0421 ,  G06F3/0418 ,  G06F2203/04104 ,  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 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.

Abstract translation: 使用包括配置为传导信号的面板的触摸系统启用触摸灵敏度，例如， 通过TIR，沿触摸表面的检测线。 信号处理器操作以获得（52）针对检测线的观测值，并且识别（54C）触摸表面上的交互图案作为优化函数的解决方案，该优化函数包括针对每个检测线的观察 值和投影值，其由投影函数给出，该投影函数定义交互图案和每条检测线的投影值之间的函数关系。 信号处理器执行归一化以确保交互模式即使在强烈触摸的情况下也表示弱触摸。 归一化涉及作为相应检测线的观测值的函数计算（54A）每个差值的相应归一化值; 并且应用（54B）相应的归一化值以便归一化优化函数中的相应差异。

公开(公告)号：WO2013089622A3

公开(公告)日：2013-08-22

申请号：PCT/SE2012051368

申请日：2012-12-10

Applicant: FLATFROG LAB AB

Inventor： CHRISTIANSSON TOMAS ,  OHLSSON NICKLAS ,  BJOERKLUND ANDREAS

IPC: G06F3/042

CPC classification number: G06F3/044 ,  G06F3/0418 ,  G06F3/0421 ,  G06F3/04883 ,  G06F2203/04109 ,  G06F2203/04111

Abstract: 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.

Abstract translation: 设备实现了在基于FTIR的触敏设备的触摸表面上追踪对象的方法。 生成指示触摸表面上的交互的本地改变的交互图（52）。 处理相互作用图（53）以分别识别表示交互作用图中局部增加和减少的相互作用的正峰值和负峰值。 为了抑制干扰的影响，应用专用的第一启发式和/或第二启发式（54）来识别正峰值之间的潜在假峰。 当正峰值被认为与一个或多个负峰值相关时，第一种启发式将正峰值指定为潜在的错误峰值。 当正峰值被认为是沿着一个移动轨迹定位时，第二启发式将正峰值指定为潜在的错误峰值。 然后更新（56）在先前时间点处认为存在于触摸表面上的所有对象的移动轨迹，同时考虑潜在的错误峰值。

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：WO2013165306A3

公开(公告)日：2014-04-03

申请号：PCT/SE2013050474

申请日：2013-04-29

Applicant: FLATFROG LAB AB

Inventor： CHRISTIANSSON TOMAS ,  OHLSSON NICKLAS ,  BJOERKLUND 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.

Abstract translation: 信号处理器实现用于检测面板上的物体的技术，该面板传输面板内的信号，使得对象被允许通过与面板的触摸面接触而与信号相互作用（例如衰减）。 信号处理器操作以定义在触摸表面上具有给定位置的单元，并且与穿过触摸表面的信号的相应的相交路径集合相关联。 信号处理器操作以从信号检测装置获得（70）输出信号，该信号检测装置测量每个路径的信号特性; 处理（71）输出信号以获得每个路径的交互值; 以及通过分析所述相交路径的至少一部分的相互作用值的分布来确定（73-75）所述单元格中的所选单元格的触摸状态。 触摸状态指示所选单元格中的一个对象的存在或不存在。

公开(公告)号：WO2013089623A3

公开(公告)日：2013-09-12

申请号：PCT/SE2012051369

申请日：2012-12-10

Applicant: FLATFROG LAB AB

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

IPC: G06F3/042

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

Abstract: 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.

Abstract translation: 设备实现了在基于FTIR的触敏设备的触摸表面上跟踪对象的方法。 该方法重复操作以产生（50-52）指示触摸表面上的交互的局部变化的交互模式，识别（53）交互模式中的明显峰值，并且基于表观峰值更新（54）现有移动轨迹。 在处理视在峰值和/或现有移动轨迹的方法中至少间歇地执行误差抑制处理（56）​​以识别具有潜在跟踪问题的牵连轨迹，为每个牵连轨迹定义两个或更多个运动命题，并且导致 在该方法的一个或多个后续重复中的运动命题的评估。 误差抑制过程通过延迟关于如何跟踪牵连轨迹的对象的最终决定来改进跟踪，直到有更多信息可用。 它还允许跟踪问题的起因使其脱离和/或物体远离显示干扰的触摸表面上的区域。

公开(公告)号：WO2013048312A3

公开(公告)日：2013-06-27

申请号：PCT/SE2012051006

申请日：2012-09-24

Applicant: FLATFROG LAB AB

Inventor： CHRISTIANSSON TOMAS ,  OHLSSON NICKLAS

IPC: G06F3/042

CPC classification number: G06F3/041 ,  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, 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.

Abstract translation: 使用包括配置为传导信号的面板的触摸系统启用触摸灵敏度，例如， 通过TIR从多个输入耦合点到多个输出耦合点，从而限定穿过耦合输出点和耦合输出耦合点对之间的触摸表面的检测线。 信号处理器以重复的重复序列操作以：计算（22）表示当前和先前迭代之间的信号变化的检测线的变化值，并且对变化值操作（23）重建算法以确定差分 整个触摸表面的交互模式。 信号处理器还操作以根据差分交互模式更新（24）跟踪模式，并基于跟踪模式生成（25）当前偏移模式。 生成偏移模式以表示触摸表面上的当前触摸交互并被提供用于对表面部分上的触摸进行识别（26）。 跟踪图案可以表示整个触摸表面上累积的相互作用，并且可以包括或至少部分地补偿触摸表面上的污染物的影响。

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：WO2013165305A3

公开(公告)日：2014-03-20

申请号：PCT/SE2013050473

申请日：2013-04-29

Applicant: FLATFROG LAB AB

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

IPC: G06F3/042 ,  G06F3/041

CPC classification number: 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 (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.

Abstract translation: 信号处理器实现用于检测面板上的物体的技术，该面板传输面板内的信号，使得对象被允许通过与面板的触摸面接触而与信号相互作用（例如衰减）。 信号处理器操作以定义在触摸表面上具有给定位置的单元，并且与穿过触摸表面的信号的相应的相交路径集合相关联。 信号处理器操作以获得（90）来自测量每个路径的信号特性的信号检测装置的输出信号; 处理（91）输出信号以获得每个路径的交互值; 并且将所述单元格中的所选单元格的单元格值（93-95'）作为所述相交路径的交互值中的中心趋势（例如中值）或最小/最大值的鲁棒测量值生成（93-95'）。 信号处理器基于单元值确定（97）所选单元中的对象的存在或不存在。

公开(公告)号：WO2013133757A3

公开(公告)日：2013-12-19

申请号：PCT/SE2013050198

申请日：2013-03-07

Applicant: FLATFROG LAB AB

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

IPC: G06F3/042 ,  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 (f) at grid points in a regular grid in a Fourier domain; and operate a two-dimensional inverse Fourier transform on the interpolated Fourier coefficients (f) so as to generate an interaction pattern for the touch surface. The interpolated Fourier coefficients (f) 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.

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; 处理用于在傅里叶域中的规则网格中的网格点处生成内插傅里叶系数（f）的数据样本; 并对内插傅立叶系数（f）进行二维傅里叶逆变换，以生成触摸面的相互作用图案。 内插傅立叶系数（f）是针对各个网格点的顺序生成的。 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。 在普通网格中通过一个或多个对称线（L1-L4）彼此映射的网格点。 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。