Mobile digital devices

A mobile digital device comprising:

• a ten-key pad being comprised of a key mat on which ten-key buttons with respective projections on the under surfaces thereof are laid out and a key circuit board on which respective contacts corresponding to the projections are laid out;
• an electrostatic capacity sensing pad for sensing an electrostatic capacity change to detect a touched region and having through holes to be inserted the projections corresponding thereto and being provided with between the key mat and the key circuit board;
• a memory for storing predetermined item names as table elements corresponding to respective small regions provided within a pad region of the electrostatic capacity sensing pad;
• an item name selector for selecting an item name corresponding to a small region in which a representative point of the touched region is situated;
• and
• a data value determiner for determining a data value of the selected item name according to a size of the touched region.

A mobile digital device comprising:

• a ten-key pad being comprised of a key mat on which ten-key buttons with respective projections on the under surfaces thereof are laid out and a key circuit board on which respective contacts corresponding to the projections are laid out;
• an electrostatic capacity sensing pad for sensing an electrostatic capacity change to detect a touched region and having through holes to be inserted the projections corresponding thereto and being provided with between the key mat and the key circuit board;
• a memory controller for storing the touched region detected by the electrostatic capacity sensing pad in a memory;
• a locus generator for generating a locus from a set of representative points of each of the touched regions stored in the memory;
• and
• a breakpoint detector for detecting a breakpoint of the locus according to a feature of the touched region.

A mobile digital device comprising:

• a ten-key pad being comprised of a key mat on which ten-key buttons with respective projections on the under surfaces thereof are laid out and a key circuit board on which respective contacts corresponding to the projections are laid out;
• an electrostatic capacity sensing pad for sensing an electrostatic capacity change to detect a touched region and having through holes to be inserted the projections corresponding thereto and being provided with a portion having the through holes between the key mat and the key circuit board and with the other portion on a part of a chassis of the mobile digital device;
• a memory controller for storing the touched region detected by the electrostatic capacity sensing pad in a memory;
• a locus generator for generating a locus from a set of representative points of each of the touched regions stored in the memory;
• a direction determiner for determining a touch direction according to a figure of the touched region detected by the electrostatic capacity sensing pad;
• and
• a breakpoint detector for detecting a breakpoint of the locus according to the touch direction determined by the direction determiner.

A mobile digital device comprising:

• a ten-key pad being comprised of a key mat on which ten-key buttons with respective projections on the under surfaces thereof are laid out and a key circuit board on which respective contacts corresponding to the projections are laid out;
• an electrostatic capacity sensing pad for sensing an electrostatic capacity change to detect a touched region and having through holes to be inserted the projections corresponding thereto and being provided with between the key mat and the key circuit board;
• and
• a controller for selecting a function corresponding to a feature of the touched region detected by the electrostatic capacity sensing pad and executing the selected function.

A mobile digital device comprising:

• a ten-key pad being comprised of a key mat on which ten-key buttons with respective projections on the under surfaces thereof are laid out and a key circuit board on which respective contacts corresponding to the projections are laid out;
• an electrostatic capacity sensing pad for sensing an electrostatic capacity change to detect a touched region and having through holes to be inserted the projections corresponding thereto and being provided with between the key mat and the key circuit board;
• a memory for storing predetermined functions corresponding to respective small regions provided within a pad region of the electrostatic capacity sensing pad;
• a function selector for selecting a function corresponding to a small region in which a representative point of the touched region is situated;
• and
• a function controller for controlling the selected function according to a feature of the touched region detected by the electrostatic capacity sensing pad.