touch lcd screen. When a finger touches the screen, the two conductive layers that are normally insulated from each other make a contact at the touch point. Because one of the conductive layers is connected to a 5V uniform voltage field in the Y- axis direction, the voltage of the detection layer changes from zero to Non-zero, after the controller detects this, it performs A / D conversion and compares the obtained voltage value with 5V to get the Y- axis coordinates of the touch point , and similarly obtains the X- axis coordinates. This is The most basic principle common to all resistive technology touch screens.

touch lcd screen. When a finger touches the screen, the two conductive layers that are normally insulated from each other make a contact at the touch point. Because one of the conductive layers is connected to a 5V uniform voltage field in the Y- axis direction, the voltage of the detection layer changes from zero to Non-zero, after the controller detects this, it performs A / D conversion and compares the obtained voltage value with 5V to get the Y- axis coordinates of the touch point , and similarly obtains the X- axis coordinates. This is The most basic principle common to all resistive technology touch screens. 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.