Patent ID: 7617168

Claim:
An apparatus for controlling a portable device by a handgrip posture of a user, comprising: a touch sensor which comprises a plurality of touch cells, wherein a current combination of touch cells are chosen by the handgrip posture of the user; a first calculation unit which calculates a first probability value that the current combination of touch cells is a registered touch cell combination while taking dependency relationships among the chosen touch cells of the current touch cell combination into consideration; a second calculation unit which calculates a second probability value that the current combination of touch cells is a registered touch cell combination without taking the dependency relationships among the chosen touch cells of the current touch cell combination into consideration; a determination unit which determines whether the current touch cell combination is registered touch cell combination or unregistered touch cell combination with reference to the first probability value and the second probability value; and an output unit which outputs a function execution signal according to the results of the determining, wherein the function execution signal controls the portable device to perform a function.