Operation steps of multipoint capacitive touch screen

- Aug 29, 2018-

The operation steps of the multi-point capacitive screen, during which the controller supplies power to the driving line successively, thus forming a specific electric field between each node and the conductor.Then, the capacitance change between the electrodes is measured by a series of scanning sensor lines to achieve multi-point positioning.When the finger or touch medium is close, the controller can quickly measure the change of the capacitance between the touch node and the wire to confirm the touch position.The shaft is driven by a set of AC signals, and the response through the touch screen is measured by a sense of electrodes on the other shaft.Users call this' transversal 'or projective.The sensor is coated with an ITO pattern of X and Y axis. When the finger touches the touch screen surface, the capacitance under the touch point increases according to the distance of the touch point. Continuous scanning on the sensor detects the change of the capacitance value, and the control chip calculates the touch point and returns it to the processor.