Patent ID: 8358285

Claim:
A touch panel scan system for detecting a change in mutual capacitance on a surface of a touch panel, comprising: a first touch detect device having a transmitter for transmitting a signal to a select one of a plurality of first lines on a first edge of a touch panel to facilitate a single line scan operation; a second touch detect device coupled with a select one or ones of second lines on a second edge of the touch panel and having a receiver for receiving therefrom and processing thereof transmit signals coupled thereto from the select one or ones of the first lines to detect changes in a mutual capacitance associated with the select one or ones of the second lines and the first line; and at least one of the first or second touch detect devices functioning as a master and the other functioning as a slave, with the master coupled to the slave and generating a start-of-scan signal external to the first and second touch detect devices to initiate a single scan operation of a select one of the first lines.