Patent ID: 7170017

Claim:
A coordinate detecting method for a touch panel, comprising the steps of: (a) converting a plurality of X-axis I/O ports and a plurality of Y-axis I/O ports respectively to form a plurality of X-axis scanning wires and a plurality of Y-axis canning wires of the touch panel by an orthogonal method; (b) transmitting polling signals to the X-axis I/O ports in sequence, which are then transmitted to the X-axis scanning wires; (c) storing a plurality of X-axis detection signals from a sensor touching the touch panel according to the polling signals; (d) determining a largest X-axis detection signal and a second largest X-axis detection signal, then determining an X coordinate position of the sensor on the touch panel; (e) transmitting polling signals to the Y-axis I/O ports in sequence, which are then transmitted to the Y-axis scanning wires; (f) storing a plurality of Y-axis detection signals from the sensor touching the touch panel according to the polling signals; and (g) determining a largest Y-axis detection signal and a second largest Y-axis detection signal, then determining a Y coordinate position of the sensor on the touch panel.