触摸屏显示电阻。解决了这个问题，但成本很高:首先是“漂移”，因为耦合电容是不稳定的。它直接受温度、湿度、指湿、人体体重、地面干燥等因素的影响，并受大面积的??外面的世界。物体的干扰也很大，会带来不稳定的结果。这些直接违反了绝对坐标系统作为触摸屏的基本要求，不可避免地产生漂移。有些电容式触摸屏要通过25点甚至96点的校准方法。用点标定法来解决漂移问题实际上是不可能的。漂移是由电容器的工作决定的。即使在控制器的单片机程序上使用动态计算和经验值查找表，也只能治标不治本。多点标定法是大屏幕投影触控板最早采用的方法。其目的是消除坐标对应的线性失真。 The linear distortion of the capacitive touch screen is also very strong, mainly because the calculation of the capacitive screen is based on the four current levels and the touch point. In the ideal state where the distance between the four electrodes is proportional, due to the influence of environmental capacitance, line parasitic capacitance, and use by different people, this proportional relationship cannot be completely linear. The multi-point calibration method can only solve the linearity of local distribution. The problem cannot solve the overall drift.

触摸屏显示电阻。解决了这个问题，但成本很高:首先是“漂移”，因为耦合电容是不稳定的。它直接受温度、湿度、指湿、人体体重、地面干燥等因素的影响，并受大面积的??外面的世界。物体的干扰也很大，会带来不稳定的结果。这些直接违反了绝对坐标系统作为触摸屏的基本要求，不可避免地产生漂移。有些电容式触摸屏要通过25点甚至96点的校准方法。用点标定法来解决漂移问题实际上是不可能的。漂移是由电容器的工作决定的。即使在控制器的单片机程序上使用动态计算和经验值查找表，也只能治标不治本。多点标定法是大屏幕投影触控板最早采用的方法。其目的是消除坐标对应的线性失真。 The linear distortion of the capacitive touch screen is also very strong, mainly because the calculation of the capacitive screen is based on the four current levels and the touch point. In the ideal state where the distance between the four electrodes is proportional, due to the influence of environmental capacitance, line parasitic capacitance, and use by different people, this proportional relationship cannot be completely linear. The multi-point calibration method can only solve the linearity of local distribution. The problem cannot solve the overall drift. IQTouch K interactive touch screen feature 20-point touch and dual system -- Android 8.0 system and optional OPS Windows 10Pro system. Its 4K UHD resolution facilitates presentations and collaboration. With optional multi-screen casting software, IQClass 6.0 and installation-free IQClass Plus software, IQTouch K Series can help create an interactive and collaborative teaching atmosphere in class.