Device and method for controlling symbols displayed on a display device

摘要

A device for controlling keyboard keys displayed on a display. A three dimensional position sensing device is used to locate a pointing object such as a finger tip hovering over a display screen. A processor moves the displayed keys in corresponding x and y directions responsive to the two dimensional location of the finger tip. The processor also increases or decreases the size of a portion of the displayed keys depending on whether the finger tip is moving toward or away from the display in the z-direction in order to assist the user in navigating a full keyboard in a small display.