Absolute coordinate system
The touch screen is an absolute coordinate system , which is characterized by the current position coordinates and the location coordinates of no previous relationship , lcd module each touch data through the calibration is directly converted into screen coordinates . No matter what the circumstances, the touch screen coordinate system on the same point set of the output data is stable . However , it does not guarantee the same point each time the touch samples are the same, that can not guarantee the absolute coordinate position, which is called drift .
Locate
Rely on a variety of touch screen sensors to work , and even some touch screen itself is a set of sensors. Their respective positioning principle and the respective sensors used determines the touch screen response speed,lcm module reliability , stability and longevity .
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