公开(公告)号：US08970521B2

公开(公告)日：2015-03-03

申请号：US13431144

申请日：2012-03-27

Applicant: Ching-Ting Chiu

Inventor： Ching-Ting Chiu

IPC: G06F3/041 ,  G06F3/044

CPC classification number: G06F3/044 ,  G06F3/0418

Abstract: A method for identifying touch object on a touch panel has steps of (A) reading m capacitance variations on a first direction, wherein the m capacitance variations respectively correspond to m sensed units of the touch panel; (B) determining whether a difference between the capacitance variation of a kth sensed unit and that of another sensed unit exceeds a preset noise ripple, wherein k is equal to or smaller than m, m is a positive integer; (C) determining whether the capacitance variation of the kth sensed unit exceeds those of the adjacent sensed units; and (D) determining a touch stylus touched on the touch panel when the difference exceeds the preset noise ripple and the capacitance variation of the kth sensed unit exceeds those of the adjacent sensed units. Accordingly, the method can correctly identify a range touched by a stylus from the sensed signals combined with LCM noise signals.

Abstract translation: 一种用于在触摸面板上识别触摸物体的方法具有以下步骤：（A）在第一方向读取m个电容变化，其中m个电容变化分别对应于触摸面板的m个感测单元; （B）确定第k个感测单元的电容变化与另一个感测单元的电容变化之间的差异是否超过预设噪声波动，其中k等于或小于m，m是正整数; （C）确定第k个感测单元的电容变化是否超过相邻感测单元的电容变化; 以及（D）当所述差异超过预设噪声波动时确定触摸面板上触摸的触摸笔，并且第k个感测单元的电容变化超过相邻感测单元的电容变化。 因此，该方法可以从与LCM噪声信号组合的感测信号中正确地识别由触控笔触摸的范围。