Patent ID: 8791907
Filing Date: 2014-07-29
Classification: G06F

Abstract:
1. A touching sensing apparatus comprising: a sensing array having multiple rows and multiple columns intersecting with each other to define multiple nodes; a plurality of driving circuits, each for providing a driving signal, which is modulated by a modulation signal, to drive a row of the sensing array; and a plurality of sensing circuits, each receiving a sensing signal measured from a column of the sensing array and extracting touching information of a node, which is an intersection of the driven row and the measured column, by using the modulation signal used by a corresponding one of the driving circuits, wherein there is provided only one row per driving circuit and each row is driven with a different modulated driving signal provided by the driving circuit associated with that row, the modulated driving signal is modulated with a specific pseudorandom (PN) code, the PN code has a characteristic of random spread spectrum, and the sensing signal of the measured column is provided to the respective sensing circuits.