Patent ID: 8803843

Claim:
A touch panel, comprising: a substrate; a plurality of first traces disposed on the substrate, wherein each of the first traces comprises: a first line comprising a first terminal and a second terminal; and a second line comprising a first terminal and a second terminal, wherein the second terminal of the first line is electrically connected to the second terminal of the second line; an insulation layer disposed on the first traces; a plurality of second traces disposed on the insulation layer, wherein each of the second traces comprises: a third line comprising a first terminal and a second terminal; and a fourth line comprising a first terminal and a second terminal, wherein the second terminal of the third line is electrically connected to the second terminal of the fourth line; and a microcontroller electrically connected to the first terminals of the first lines, the second lines, the third lines and the fourth lines is operable to control the second lines and/or the fourth lines so that the first traces and/or the second traces form open loops or closed loops, wherein the microcontroller received a capacitance variation value through the first lines and/or the third lines when the open loops are formed, the microcontroller received an electromagnetic signal through the first lines and/or the third lines when the closed loops are formed.