公开(公告)号：WO2010006883A3

公开(公告)日：2010-12-02

申请号：PCT/EP2009057724

申请日：2009-06-22

Applicant: FLATFROG LAB AB ,  CHRISTIANSSON TOMAS ,  WASSVIK OLA ,  BRYBORN MATTIAS

Inventor： CHRISTIANSSON TOMAS ,  WASSVIK OLA ,  BRYBORN MATTIAS

IPC: G06F3/042

CPC classification number: G06F3/0421 ,  G06F3/0423 ,  G06F2203/04109

Abstract: A device operates on output signals (S1, S2) from a light sensor arrangement in a touch-sensing apparatus to determine a position of an object (6) on a touch surface (4). The apparatus includes a light transmissive panel (1) that defines the touch surface (4) and an opposite surface. A light source arrangement provides sheets of light inside the panel (1), wherein each sheet comprises light that propagates by internal reflection between the touch surface (4) and the opposite surface from one or more incoupling points to a set of outcoupling points. The light sensor arrangement generates the output signals (S1, S2), which represent light reaching the outcoupling points. The apparatus is configured such that an object (6) touching the touch surface (4) locally attenuates at least two sheets of light. To determine the position, the device identifies, in the output signals (S1, S2), a set of signal profiles (P1a, P1b, P2a, P2b) originating from said object (6). The device determines at least part of an attenuated light path across the panel (1) based on each signal profile (P1a, P1b, P2a, P2b), and identifies the position of the object (6) on the touch surface (4) based on the thus-determined attenuated light paths. In determining the attenuated light path, the device applies a predetermined width function which is representative of a dependence of signal profile width on distance to the incoupling point due to light scattering caused by at least one of the touch surface (4) and the opposite surface (5).

Abstract translation: 装置对来自触敏装置中的光传感器装置的输出信号（S1，S2）进行操作以确定物体（6）在触摸表面（4）上的位置。 该设备包括限定触摸表面（4）和相对表面的透光板（1）。 光源装置在面板（1）内提供多张光，其中每张薄片包括通过在触摸表面（4）和相对表面之间从一个或多个耦合点到一组耦合点之间的内部反射传播的光。 光传感器装置产生代表到达外耦合点的光的输出信号（S1，S2）。 该装置被配置为使得触摸触摸表面（4）的物体（6）局部地衰减至少两个光片。 为了确定位置，设备在输出信号（S1，S2）中识别源自所述对象（6）的一组信号轮廓（P1a，P1b，P2a，P2b）。 该装置基于每个信号轮廓（P1a，P1b，P2a，P2b）确定横跨面板（1）的衰减光路径的至少一部分，并基于触摸表面（4）识别物体（6）的位置 在这样确定的衰减光路上。 在确定衰减光路时，该装置施加预定宽度函数，该预定宽度函数表示由于触摸表面（4）和相对表面（4）中的至少一个引起的光散射而导致的信号轮廓宽度与到耦合点的距离的依赖性 （5）。

公开(公告)号：WO2010006886A2

公开(公告)日：2010-01-21

申请号：PCT/EP2009057731

申请日：2009-06-22

Applicant: FLATFROG LAB AB ,  WASSVIK OLA ,  CHRISTIANSSON TOMAS ,  BRYBORN MATTIAS

Inventor： WASSVIK OLA ,  CHRISTIANSSON TOMAS ,  BRYBORN MATTIAS

IPC: G06F3/042

CPC classification number: G06F3/0421 ,  G06F3/0423 ,  G06F2203/04109

Abstract: An apparatus is operated to determine a location of at least one object (O1) on a touch surface of a light transmissive panel (1). An illumination arrangement in the apparatus is operated to introduce beams (B1, B2) of radiation into the panel (1) for propagation by internal reflection between the touch surface and the opposite surface, and to sweep each beam (B1, B2) along the touch surface within a sensing area. Thereby, the sensing area is illuminated such that an object (O1) that touches the touch surface within the sensing area causes at least two beams to be temporarily attenuated. The illumination arrangement is arranged such that each beam (B1, B2), downstream of the sensing area, is swept along one or more elongate outcoupling sites on the panel (1). At least one light sensor (9A, 9B), which is optically coupled to the outcoupling site, is operated to measure the received energy of the beam (B1, B2) within the outcoupling site. A data processor (7) is operated to obtain, from the light sensor (9A, 9B), an output signal (S1, S2) indicative of the received energy of the beam (B1, B2) within the outcoupling site as a function of time, and to identify, based on the output signals (S1, S2) for the different beams (B1, B2), the location of the object.

Abstract translation: 操作装置来确定在透光面板（1）的触摸表面上的至少一个物体（O1）的位置。 操作该装置中的照明装置以将辐射束（B1，B2）引入面板（1）中，以通过在触摸表面和相对表面之间的内部反射进行传播，并且沿着该扫描方向扫描每个光束（B1，B2） 感测区域内的触摸表面。 因此，感测区域被照亮，使得接触感测区域内的触摸表面的物体（O1）使得至少两个光束被暂时衰减。 照明装置被布置成使得在感测区域下游的每个光束（B1，B2）沿面板（1）上的一个或多个细长的外耦合位置扫过。 操作光学耦合到外耦合位置的至少一个光传感器（9A，9B），以测量外耦合位置内的束（B1，B2）的接收能量。 操作数据处理器（7）以从光传感器（9A，9B）获得表示外耦合位置内的接收能量（B1，B2）的接收能量的输出信号（S1，S2），作为 时间，并且基于用于不同波束（B1，B2）的输出信号（S1，S2）来识别对象的位置。

公开(公告)号：CA2778154A1

公开(公告)日：2011-04-28

申请号：CA2778154

申请日：2010-10-13

Applicant: FLATFROG LAB AB

Inventor： CHRISTIANSSON TOMAS ,  BRYBORN MATTIAS

IPC: G06F3/042

Abstract: A touch-sensing apparatus comprises a light transmissive panel, in which sheets of light are propagated by internal reflection between a touch surface and an opposite surface from an incoupling site to an outcoupling site. The touch-sensing apparatus is configured such that objects touching the touch surface cause a local attenuation of at least two sheets of light. A light sensor arrangement is optically connected to the outcoupling site to measure transmitted light energy. A data processor is connected to the light sensor arrangement and configured to execute a touch determination process. The process operates on at least oneprojection signal which is indicative of a spatial distribution of light within the outcoupling site. In the process, the projection signal(s) is/are processed for identification of signal profiles representing the attenuation (step 202). The signal profiles are used for identifying one or more candidate touch areas on the touch surface (step 1206´). The projection signal(s) is/are then processed to reconstruct a two-dimensional distribution of signal values locally within the one or more 1 candidate touch areas (step 1207), whereupon touch data for the or each object is determined by processing the reconstructed signal values within the candidate touch areas (step 1208).