Waveform dividing method for a capacitive touch control device

摘要

A waveform dividing method for a capacitive touch control device saves a first waveform in a direction, and then saves a multi-touch waveform in the direction when another object further touches the capacitive touch control device. If the multi-touch waveform is identified as having waveform overlapping, a second waveform is extracted from the difference between the multi-touch waveform and the first waveform. By calculating with the second waveform, accurate positioning of the objects on the capacitive touch control device can be achieved.

主权项

1. A waveform dividing method for a capacitive touch control device, comprising steps of:
step A: saving and updating a first waveform in a direction caused by a first object when the first object touches the capacitive touch control device; step B: saving a multi-touch waveform in the direction when the first object is stationary on the capacitive touch control device and a second object further touches the capacitive touch control device, wherein the multi-touch waveform is established by the first waveform and a second waveform in the direction caused by the second object; step C: identifying whether the multi-touch waveform has waveform overlapping resulted from the first waveform and the second waveform; and step D: extracting the second waveform from a difference between the multi-touch waveform and the first waveform if the multi-touch waveform is identified as having waveform overlapping; wherein step C further comprises a step of identifying the multi-touch waveform as having waveform overlapping when the multi-touch waveform does not have a valley.