Patent ID: 8743085

Claim:
A touch input device for switching driving signals, the touch input device comprising: a touch panel, including: a plurality of X-directional sensing lines; a plurality of Y-directional sensing lines, wherein the X-directional sensing lines and the Y-directional sensing lines are arranged in a staggered manner; and a plurality of mutual capacitors formed between every X-directional sensing line and every Y-directional sensing line; and a panel driving circuit, configured for driving the touch panel, the panel driving circuit comprising: a selecting circuit including a multiplexer, wherein the selecting circuit selects and shifts an X-directional measuring channel or a Y-directional measuring channel in accordance with a predetermined number of the X-directional sensing lines and Y-directional sensing lines; a driving signal generating circuit configured for transmitting a driving signal to the X-directional measuring channel or the Y-directional measuring channel in accordance with a clock signal, wherein the multiplexer controls the X-directional sensing lines and Y-directional sensing lines that do not comprise either the X-directional measuring channel or the Y-directional measuring channel to be grounded or floating in accordance with the driving signal; and a touch sensing circuit configured to detect two voltages of the Y-directional sensing lines in the Y-directional measuring channel, wherein when two Y-directional sensing lines, adjacent to the Y-directional measuring channel, are grounded, the other Y-directional sensing lines and the X-directional sensing lines that do not comprise the X-directional measuring channel are floating.