The present invention is directed to a shared electrode pattern field effect touch sensor apparatus. The apparatus includes first and second spaced electrode patterns, each having an inner electrode and an outer electrode. The inner electrode includes a primary portion defining a primary sense area and...http://www.google.fr/patents/US7733333?utm_source=gb-gplus-shareBrevet US7733333 - Shared electrode pattern field effect sensor and joystick therewith
Shared electrode pattern field effect sensor and joystick therewith
