公开(公告)号：EP2628068A4

公开(公告)日：2014-02-26

申请号：EP11832837

申请日：2011-10-07

Applicant: FLATFROG LAB AB

Inventor： CHRISTIANSSON TOMAS ,  WALLANDER MATS PETTER ,  JUHLIN PETER

IPC: G06F3/042

CPC classification number: G06F3/041 ,  G06F3/0428 ,  G06F2203/04109

公开(公告)号：EP2567306A4

公开(公告)日：2013-12-25

申请号：EP11777650

申请日：2011-04-28

Applicant: FLATFROG LAB AB

Inventor： CHRISTIANSSON TOMAS ,  JUHLIN PETER

IPC: G06F3/042

CPC classification number: G06F3/0421 ,  G06F3/042 ,  G06F2203/04104 ,  G06F2203/04109

Abstract: A touch-sensitive apparatus comprises a panel configured to conduct signals from a plurality of peripheral incoupling points to a plurality of peripheral outcoupling points. Actual detection lines are defined between pairs of incoupling and outcoupling points to extend across a surface portion of the panel. The signals may be in the form of light, and objects touching the surface portion may affect the light via frustrated total internal reflection (FTIR). A signal generator is coupled to the incoupling points to generate the signals, and a signal detector is coupled to the out-coupling points to generate an output signal. A data processor operates on the output signal to enable identification of touching objects. The output signal is processed (40) to generate a set of data samples, which are indicative of detected energy for at least a subset of the actual detection lines. The set of data samples is processed (42) to generate a set of matched samples, which are indicative of estimated detected energy for fictitious detection lines that have a location on the surface portion that matches a standard geometry for tomographic reconstruction. The set of matched samples is processed (44, 46) by tomographic reconstruction to generate data indicative of a distribution of an energy-related parameter within at least part of the surface portion.

Abstract translation: 触敏设备包括面板，该面板被配置为将信号从多个外围输入耦合点传导到多个外围输出耦合点。 实际检测线被限定在成对的入耦合点和出耦合点之间以延伸穿过面板的表面部分。 信号可以是光的形式，接触表面部分的物体可以通过受抑全内反射（FTIR）影响光。 信号发生器耦合到输入耦合点以产生信号，并且信号检测器耦合到输出耦合点以产生输出信号。 数据处理器对输出信号进行操作，以识别触摸物体。 对输出信号进行处理（40）以产生一组数据样本，这些数据样本表示对于实际检测线的至少一个子集检测到的能量。 对该组数据样本进行处理（42）以生成一组匹配样本，这些样本指示虚拟检测线的估计检测能量，所述虚拟检测线在表面部分上具有匹配用于层析X射线照相术重建的标准几何形状的位置。 通过层析重建处理（44,46）该组匹配样本以生成指示表面部分的至少一部分内的能量相关参数的分布的数据。

公开(公告)号：EP2588942A4

公开(公告)日：2017-01-25

申请号：EP11801248

申请日：2011-06-29

Applicant: FLATFROG LAB AB

Inventor： CHRISTIANSSON TOMAS ,  WASSVIK OLA ,  FÅHRAEUS CHRISTER

IPC: G06F3/041

CPC classification number: G06F3/0416 ,  G06F3/041 ,  G06F3/0418 ,  G06F3/044 ,  G06F3/04883 ,  G06F2203/04104 ,  G06F2203/04808

Abstract: A device obtains a signal representative of objects on a touch surface of a multi-touch sensing apparatus and executes a method for extracting touch data from the signal. The method operates in a sequence of detection frames. Each detection frame comprises the steps of: obtaining (300) the signal; processing (301) the signal for identifying touches; determining (302) a set of identified touches and touch data for the set of identified touches; and outputting (303) the touch data. At least one of the steps of processing (301) and determining (302) includes a prioritization that actively favors certain touches to be identified and included in the set of identified touches, respectively. Temporal prioritization favors a touch that corresponds to a previous touch, which is identified in one or more preceding detection frames. Spatial prioritization favors a touch that is located within at least one predefined subarea on the touch surface. The and prioritization enables the touch data to be generated in way that is predictable, consistent and in accordance with user expectations within a general or specific context.

公开(公告)号：EP2845081A4

公开(公告)日：2015-12-16

申请号：EP13784581

申请日：2013-04-29

Applicant: FLATFROG LAB AB

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

IPC: G06F3/042 ,  G06F3/041

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

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。

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。

公开(公告)号：EP2791763A4

公开(公告)日：2015-08-05

申请号：EP12857303

申请日：2012-12-10

Applicant: FLATFROG LAB AB

Inventor： CHRISTIANSSON TOMAS ,  OHLSSON NICKLAS ,  BJÖRKLUND 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.

公开(公告)号：EP2491479A4

公开(公告)日：2014-09-03

申请号：EP10825282

申请日：2010-10-13

Applicant: FLATFROG LAB AB

Inventor： CHRISTIANSSON TOMAS

IPC: G06F3/042

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

Abstract: A touch-sensing apparatus is based on frustrated total internal reflection (FTIR). The apparatus comprises a panel, in which sheets of light are propagated by internal reflection between a touch surface and an opposite surface. A light sensor arrangement is optically connected to the panel to measure transmitted light energy on detection lines across the touch surface. Each detection line represents a light path across the touch surface from a light source to a light sensor. An object that touches the touch surface will frustrate the propagating light and cause a local attenuation among the detection lines. A data processor is connected to the light sensor arrangement and configured to execute a process for extracting touch-related data.

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.

公开(公告)号：EP2673697A4

公开(公告)日：2014-07-02

申请号：EP12857555

申请日：2012-12-10

Applicant: FLATFROG LAB AB

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

IPC: G06F3/042 ,  G06F3/041

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