Patent ID: 7379049
Filing Date: 2008-05-27
Classification: G06F

Abstract:
1. An apparatus for controlling the position of a screen pointer, the apparatus comprising: a light source for illuminating an imaging surface, thereby generating reflected images; and an optical motion sensor for generating one-dimensional projection data based on the reflected images, filtering the projection data, and generating movement data based on the filtered projection data, the movement data indicative of relative motion between the imaging surface and the apparatus; wherein the optical motion sensor comprises a first and a second one-dimensional array of elongated photodetectors for receiving the reflected images, and wherein the first one-dimensional array of elongated photodetectors generates analog projection data for a first axis, and the second one-dimensional array of elongated photodetectors generates analog projection data for a second axis; wherein the elongated photodetectors in the first array have a length to width ratio in the range of five to one (5:1) to twenty to one (20:1), and wherein the elongated photodetectors in the second array have a width to length ratio in the range of five to one (5:1) to twenty to one (20:1).