公开(公告)号：US09024903B2

公开(公告)日：2015-05-05

申请号：US13938687

申请日：2013-07-10

Applicant: Novatek Microelectronics Corp.

Inventor： Chun-Hung Chen ,  Yi-Rong Ko ,  Shun-Li Wang

IPC: G09G5/00 ,  G06F3/044 ,  G06F3/041

CPC classification number: G06F3/044 ,  G06F3/0418

Abstract: A detection method for a capacitive touch device is provided. The detection method includes steps of: driving an Mth driving line among an m driving lines of the capacitive touch device, wherein M is a natural number smaller than or equal to m and greater than 1; selecting a plurality of sensing lines among n sensing lines; obtaining a plurality of sensing values by detecting voltage changes at the selected sensing lines; determining whether to perform a noise reduction operation on the sensing values; if yes, calculating respective differences between the sensing values and a baseline value, and generating a noise correction value corresponding to the sensing values by performing a statistical computation on the differences; and correcting the differences according to the noise correction value.

Abstract translation: 提供了一种用于电容式触摸装置的检测方法。 检测方法包括以下步骤：驱动电容式触摸装置的m个驱动线中的第M个驱动线，其中M是小于或等于m且大于1的自然数; 在n个感测线中选择多个感测线; 通过检测所选择的感测线路上的电压变化来获得多个感测值; 确定是否对所述感测值执行降噪操作; 如果是，则计算感测值和基线值之间的差异，并通过对差异进行统计计算来产生与感测值对应的噪声校正值; 以及根据噪声校正值校正差异。