Reducing accidental touch-sensitive device activation

In a computer having a touch-sensitive surface sensitive to and distinguishing between stylus input and non-stylus input to the surface, a method comprising:

• (a) performing a function responsive to stylus input to the touch-sensitive surface;
• (b) performing the function responsive to non-stylus input to the touch-sensitive surface, (i) when the non-stylus input meets a first threshold touch pressure of the non-stylus input to the touch sensitive surface, the first threshold touch pressure being automatically determined based upon a determined physical angle of orientation of the touch-sensitive surface, (ii) the stylus is not detected as hovering within a threshold distance from the touch-sensitive surface and (iii) the non-stylus input does not match any of a plurality of stored non-stylus input contact shape profiles indicative of ignored non-stylus input when normalized for size and rotation, wherein each shape profile includes a distinct shape of a non-stylus input contact to the touch sensitive surface that is ignored;
• and
• (c) responsive to the stylus being detected as hovering within a threshold distance, accepting non-stylus input to the touch-sensitive surface (i) when the non-stylus input meets a second threshold touch pressure of the non-stylus input to the touch sensitive surface, the second threshold touch pressure being automatically determined based upon a determined physical angle of orientation of the touch-sensitive surface and being different from the first threshold touch pressure, (ii) the stylus is detected as hovering within a threshold distance from the touch-sensitive surface and (iii) the non-stylus input does not match any of a plurality of stored non-stylus input contact shape profiles indicative of ignored non-stylus input when normalized for size and rotation, wherein each shape profile includes a distinct shape of a non-stylus input contact to the touch sensitive surface that is ignored.

A computing device having stored computer-executable instructions that, when executed, perform operations comprising:

• (a) performing a function responsive to stylus input to a touch-sensitive surface;
• (b) performing the function responsive to non-stylus input to the touch-sensitive surface, when the non-stylus input meets a first threshold touch pressure of the non-stylus input to the touch sensitive surface, and when the stylus is not detected as hovering within a threshold distance from the touch-sensitive surface and the non-stylus input does not match any of a plurality of stored non-stylus input contact shape profiles indicative of ignored non-stylus input when normalized for size and rotation, wherein each shape profile includes a distinct shape of a non-stylus input contact to the touch sensitive surface that is ignored;
• and
• (c) responsive to the stylus being detected as hovering within a threshold distance, accepting non-stylus input to the touch-sensitive surface when the non-stylus input meets a second threshold touch pressure of the non-stylus input to the touch sensitive surface, the second threshold being different from the first threshold, and when the stylus is detected as hovering within a threshold distance from the touch-sensitive surface and the non-stylus input does not match any of a plurality of stored non-stylus input contact shape profiles indicative of ignored non-stylus input when normalized for size and rotation, wherein each shape profile includes a distinct shape of a non-stylus input contact to the touch sensitive surface that is ignored.