Capacitive touch system and control method for a capacitive touch system

摘要

A capacitive touch system uses two or more integrated circuits to simultaneously scan a touch panel in such a manner that each of the integrated circuits scans only a portion of the touch panel to retrieve a respective detected data by itself. All the detected data are used for computation by one of the integrated circuits or one other than the integrated circuits to determine a touch information. This approach enables axis intersect projected capacitance touch integrated circuits applicable to a large scale touch panel, without degrading the frame rate of a capacitive touch system.

主权项

1. A capacitive touch system, comprising;
a touch panel formed of a single panel having a plurality of traces; at least a first integrated circuit connected to the touch panel formed of a single panel, the first integrated circuit scanning a first portion of the touch panel by charging or discharging the traces of the first portion to retrieve first detected data; and a second integrated circuit connected to the touch panel formed of a single panel and the at least a first integrated circuit, the second integrated circuit scanning a second portion of the touch panel by charging or discharging the traces of the second portion to retrieve a second detected data, receiving all the first detected data from the at least a first integrated circuit, and calculating with all the first detected data retrieved by the at least a first integrated circuit and the second detected data retrieved by the second integrated circuit to determine a touch information; wherein the at least a first integrated circuit and the second integrated circuit simultaneously scan the respective first and second touch panel portions to increase a frame rate of the capacitive touch system.