Method and apparatus for locking a mobile telephone touch screen

摘要

A mobile phone having a touch screen display includes a touch screen lock which is activated during an ongoing call by contacting the touch screen a first time and pressing again within a predetermined time duration interval the touch screen lock remains active during subsequent pressing contacts. The touch screen lock is deactivated during an ongoing call in the absence of pressing contact with the touch screen surface for a time duration interval greater than or equal to a predetermined time duration interval.