Stereoscopic touch panel and touch sensing method

A stereoscopic touch panel, comprising:

• a substrate, having a spherical surface, wherein the spherical surface comprises a non-operation region, and a polar axis of the spherical surface passes through the non-operation region to define a pole;
• M dextrorotatory lines, disposed on the spherical surface, wherein each of the dextrorotatory lines extends from the non-operation region in a direction leaving the pole and rotates a dextrorotatory angle with respect to a meridian direction of the spherical surface, and each of the dextrorotatory lines is deviated a longitude of (2π/M degrees with respect to an adjacent dextrorotatory line, wherein M is a positive integer greater than 1;
• and
• N levorotatory lines, disposed on the spherical surface, wherein each of the levorotatory lines extends from the non-operation region in the direction leaving the pole and rotates a levorotatory angle with respect to the meridian direction of the spherical surface, and each of the levorotatory lines is deviated a longitude of (2π)/N degrees with respect to an adjacent levorotatory line, wherein N is a positive integer greater than 1.