公开(公告)号：US08866792B2

公开(公告)日：2014-10-21

申请号：US12957409

申请日：2010-12-01

申请人： Wanqiu Wang ,  Chun-Chi Lin

发明人： Wanqiu Wang ,  Chun-Chi Lin

IPC分类号： G06F3/045 ,  G06F3/041 ,  G06F3/044

CPC分类号： G06F3/044 ,  G06F3/0416

摘要： The present invention relates to a method for scanning a projective capacitive touch panel. The method includes the following steps: scanning the mutual capacitance that are divided into at least two groups by applying different frequency excitation signals to different mutual capacitance groups, wherein a frequency of a excitation signal applied to a mutual capacitance group with greater RC constant is lower than that of a excitation signal applied to a mutual capacitance group with smaller RC constant; obtaining a first current voltage of each mutual capacitance; comparing the first current voltage with a first reference voltage to obtain candidate mutual capacitance whose first current voltage exceed the first reference voltage by a first threshold value; scanning the candidate mutual capacitance by applying a low frequency excitation signal; obtaining a second current voltage of each candidate mutual capacitance; comparing the second current voltage of each candidate mutual capacitance with a corresponding second reference voltage to obtain touched mutual capacitance whose second current voltage exceed the corresponding second reference voltage by a second threshold value.

摘要翻译： 本发明涉及一种用于扫描投影电容式触摸屏的方法。 该方法包括以下步骤：通过向不同的互电容组施加不同的频率激励信号来扫描被分成至少两组的互电容，其中施加到具有较大RC常数的互电容组的激励信号的频率较低 比施加到具有较小RC常数的互电容组的激励信号的频率更高; 获得每个互电容的第一电流电压; 将第一电流电压与第一参考电压进行比较，以获得其第一电流电压超过第一参考电压第一阈值的候选互电容; 通过施加低频激励信号来扫描候选互电容; 获得每个候选互电容的第二电流电压; 将每个候选互电容的第二电流电压与对应的第二参考电压进行比较，以获得其第二电流电压超过对应的第二参考电压达到第二阈值的触摸的互电容。

公开(公告)号：US20110175835A1

公开(公告)日：2011-07-21

申请号：US13009847

申请日：2011-01-19

申请人： Wanqiu Wang

发明人： Wanqiu Wang

IPC分类号： G06F3/041

CPC分类号： G06F3/044 ,  G06F3/0416

摘要： The present invention relates to a method for scanning a projective capacitive touch panel including: A. scanning each first-axis electrode arranged along a first-axis and each second-axis electrode arranged along a second-axis, then obtaining the first-axis electrode and the second-axis electrode whose self capacitance changes; B. detecting the mutual capacitance at each intersection between the first-axis electrode and the second-axis electrode whose self capacitance changes to determine whether the mutual capacitance changes, then the area where the mutual capacitance changes being taken as a touched area. The present invention also relates to a storage medium storing instructions of implementing above method and an apparatus that implements the above method.

摘要翻译： 本发明涉及一种用于扫描投影电容式触摸屏的方法，包括：扫描沿着第一轴布置的每个第一轴电极和沿着第二轴布置的每个第二轴电极，然后获得第一轴电极 和自身电容变化的第二轴电极; B.检测在自身电容变化的第一轴电极和第二轴电极之间的每个交叉点处的互电容，以确定互电容是否变化，然后将互电容变化的区域作为触摸区域。 本发明还涉及存储实现上述方法的指令的存储介质和实现上述方法的装置。