METHOD FOR DETECTING AND LOCATING KEYPRESS-EVENTS ON TOUCH-AND VIBRATION-SENSITIVE FLAT SURFACES

摘要

Systems and methods for enabling use of vibration sensors attached to the touch-sensitive surface to both detect and locate finger contact events on the surface. The invention specifically discriminates between intentional typing events and casual or unwanted contacts resulting from normal typing actions, thus allowing the user to rest their fingers on the keys and allowing them to type as they would on a regular keyboard. Signals from both touch and vibration sensors are translated into a series of input events. Input events are then temporally correlated to determine the location of the finger contact and activation of the corresponding key. Correlated events are then filtered to remove unwanted events and resolve ambiguous or contradictory results.