Abstract: A portable device has a first and a second area. The portable device includes a flat display module disposed at the first area and having a display area with a plurality of first coordinate positions, a touch pad module disposed at the second area and having a touch pad with a plurality of second coordinate positions corresponding to the first coordinate positions respectively, and a coordinate transformation module. The flat display module displays a cursor at the first coordinate position of the display area according to a cursor position signal. The touch pad module senses the second coordinate position that an object presses at the touch pad and then generates a touch position signal. The coordinate transformation module transforms the touch position signal to the cursor position signal. According to the cursor position signal, the cursor is displayed at the first coordinate position corresponding to the second coordinate position.

Abstract: A portable electronic device includes a casing and a touch pad device. The casing has an opening. The touch pad device is mounted on the casing, and includes a touch pad, a support, a suspending device, and a sensing device. The touch pad is movable and exposed in the opening. The support is mounted on the casing. The suspending device is mounted between the touch pad and the support. The sensing device includes a plurality of sensing elements respectively mounted on the support correspondingly to the perimeter of the touch pad.