公开(公告)号：EP2491481A4

公开(公告)日：2014-08-20

申请号：EP10825284

申请日：2010-10-13

Applicant: FLATFROG LAB AB

Inventor： CHRISTIANSSON TOMAS ,  BRYBORN KRUS MATTIAS

IPC: G06F3/042

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

公开(公告)号：EP2473906A4

公开(公告)日：2014-01-15

申请号：EP10814031

申请日：2010-09-01

Applicant: FLATFROG LAB AB

Inventor： CHRISTIANSSON TOMAS ,  WASSVIK OLA

IPC: G06F3/042 ,  G06F1/32

CPC classification number: G06F3/0421 ,  G06F1/3262 ,  G06F2203/04109

公开(公告)号：EP2370884A4

公开(公告)日：2012-05-23

申请号：EP09830665

申请日：2009-12-02

Applicant: FLATFROG LAB AB

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

公开(公告)号：EP3161594A4

公开(公告)日：2018-01-17

申请号：EP15812234

申请日：2015-06-22

Applicant: FLATFROG LAB AB

Inventor： OHLSSON NICKLAS ,  CHRISTIANSSON TOMAS

IPC: G06F3/042

CPC classification number: G01N21/958 ,  G01N21/59 ,  G01N21/94 ,  G01N2021/945 ,  G01N2201/124 ,  G06F3/0418 ,  G06F3/0421 ,  G06F2203/04109

Abstract: A device implements a method for detecting contamination of an FTIR-based panel. The apparatus generates projection signals representing detection lines that have propagated on a plurality of propagation paths by total internal reflection (TIR) inside a transmissive panel such that contamination on the panel surface causes attenuation (frustration) of at least one of the projection signals. The device generates a transmission value for each detection line in the transmissive panel, and determines the presence of contamination on the surface of the panel by comparing the transmission values according to at least one of the presented comparison techniques.

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.

公开(公告)号：EP2817696A4

公开(公告)日：2015-09-30

申请号：EP13752508

申请日：2013-02-19

Applicant: FLATFROG LAB AB

Inventor： CHRISTIANSSON TOMAS ,  OHLSSON NICKLAS

IPC: G06F3/041 ,  G06F3/042

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 observed values for the detection lines, and identify 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 a respective normalization value for each of the differences as a function of the observed value for the respective detection line; and applying the respective normalization value so as to normalize the respective difference in the optimization function.

公开(公告)号：EP2712435A4

公开(公告)日：2015-03-18

申请号：EP12785105

申请日：2012-05-14

Applicant: FLATFROG LAB AB

Inventor： CHRISTIANSSON TOMAS ,  JUHLIN PETER ,  WALLANDER MATS PETTER ,  WASSVIK OLA

IPC: G06F3/042 ,  G06F3/041

CPC classification number: G06F3/041 ,  G06F3/0418 ,  G06F3/0421 ,  G06F2203/04109

公开(公告)号：EP2684113A4

公开(公告)日：2015-01-21

申请号：EP12755724

申请日：2012-03-06

Applicant: FLATFROG LAB AB

Inventor： WALLANDER MATS PETTER ,  CHRISTIANSSON TOMAS ,  WALL HENRIK

IPC: G06F3/042 ,  G06F3/041

CPC classification number: G06F3/0416 ,  G06F3/0418 ,  G06F3/042 ,  G06F2203/04808

公开(公告)号：EP2433204A4

公开(公告)日：2014-07-23

申请号：EP10778006

申请日：2010-05-14

Applicant: FLATFROG LAB AB

Inventor： WASSVIK OLA ,  CHRISTIANSSON TOMAS

IPC: G06F3/042 ,  G06F3/041

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

公开(公告)号：EP2673696A4

公开(公告)日：2014-03-26

申请号：EP12836505

申请日：2012-09-24

Applicant: FLATFROG LAB AB

Inventor： CHRISTIANSSON TOMAS ,  OHLSSON NICKLAS

IPC: G06F3/042 ,  G06F3/041

CPC classification number: G06F3/041 ,  G06F3/0421 ,  G06F2203/04109