公开(公告)号：US20150029146A1

公开(公告)日：2015-01-29

申请号：US14340515

申请日：2014-07-24

Applicant: THALES

Inventor： Philippe CONI ,  Frederic Renaud ,  Yves Sontag

IPC: G06F3/044

CPC classification number: G06F3/044 ,  G06F3/0416

Abstract: The general field of the invention is that of devices with touchscreen of the capacitive type comprising two matrix touch pads connected to an electronic assembly comprising emission and receiving means. The emission means generate a plurality of emission signals at various frequencies. A period equal to the inverse of the said frequency being associated with each frequency, the values of the frequencies are such that there exist a plurality of integer numbers each associated with a frequency and with a period such that the product of each integer number with the associated period is a constant product. The receiving means comprise a synchronous amplitude demodulation arranged in such a manner as to perform the multiplication of the received signal by a plurality of periodic functions representative of each frequency, the multiplied signals obtained being integrated over an identical period of time corresponding to the said constant product, each signal thus integrated being representative of a received signal at a single given frequency.

Abstract translation: 本发明的一般领域是具有电容型触摸屏的装置，其包括连接到包括发射和接收装置的电子组件的两个矩阵触摸板。 发射装置产生各种频率的多个发射信号。 等于与每个频率相关联的所述频率的倒数的周期，频率值使得存在多个整数，每个整数与频率相关联，并且具有周期，使得每个整数的乘积与 相关期间是不变的产品。 接收装置包括一个同步幅度解调器，以这样一种方式进行排列，即以接收信号乘以代表每个频率的多个周期函数，所获得的相乘信号在对应于所述常数的相同时间段上被积分 产品，因此如此集成的每个信号代表单个给定频率的接收信号。