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    A TOUCH SENSING APPARATUS AND METHOD OF OPERATING THE SAME
    1.
    发明申请
    A TOUCH SENSING APPARATUS AND METHOD OF OPERATING THE SAME 审中-公开
    触摸感应装置及其操作方法

    公开(公告)号：WO2010064983A3

    公开(公告)日：2010-08-05

    申请号：PCT/SE2009051364

    申请日：2009-12-02

    Applicant: FLATFROG LAB AB ,  FAAHRAEUS CHRISTER ,  WALL HENRIK ,  WASSVIK OLA ,  CHRISTIANSSON TOMAS

    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

    Abstract: A touch sensing apparatus is controlled to determine the position of one or more objects (7) that interact with a touch surface (1). The apparatus includes a group of emitters (2) arranged to emit light to illuminate at least part of the touch surface (1), a light detector (4) arranged to receive light from the group of emitters (2), and a processing element (7). Each emitter (2) is controlled to transmit a code by way of the emitted light such that the code identifies the respective emitter (2). The codes may at least partly be transmitted concurrently. The codes may be selected such that a value of an autocorrelation of each code is significantly higher than a value of a cross-correlation between any two codes of different emitters (2). The processing element processes an output signal from the light detector (4) to separate the light received from the individual emitters (2) based on the transmitted codes, and to determine the position of the object/objects (7) based on the light received from the individual emitters (2), e.g. using triangulation or image reconstruction such as an algorithm for transmission tomography.

    Abstract translation: 控制触摸感测装置以确定与触摸表面（1）相互作用的一个或多个物体（7）的位置。 该设备包括：一组发射器（2），被布置为发射光以照亮触摸表面（1）的至少一部分;光检测器（4），被布置为接收来自该组发射器（2）的光;以及处理元件 （7）。 控制每个发射器（2）通过发射的光传输代码，使得代码识别相应的发射器（2）。 代码可以至少部分地同时传输。 代码可以被选择为使得每个代码的自相关值明显高于不同发射器（2）的任何两个代码之间的互相关的值。 处理元件处理来自光检测器（4）的输出信号，以基于所发送的代码分离从各个发射器（2）接收的光，并且基于所接收的光来确定物体/物体（7）的位置 来自各个发射器（2），例如， 使用三角测量或图像重建，例如透射层析成像算法。

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