US 7,321,359 B2 | ||
Method and device for optical navigation | ||
Tong Xie, San Jose, Calif. (US); Marshall T. DePue, San Mateo, Calif. (US); and Douglas M. Baney, Los Altos, Calif. (US) | ||
Assigned to Avago Technologies ECBU IP (Singapore) Pte. Ltd., Singapore (Singapore) | ||
Filed on Jul. 30, 2003, as Appl. No. 10/630,169. | ||
Prior Publication US 2005/0024623 A1, Feb. 03, 2005 | ||
Int. Cl. G09G 5/08 (2006.01) |
U.S. Cl. 345—163 [345/156] | 19 Claims |
1. An optical navigation device comprising:
a light source for illuminating a surface with a narrow bandwidth beam at an angle of illumination with respect to said surface;
a detector positioned at an angle of reflection with respect to said surface operable to receive a reflected portion of said
narrow bandwidth beam, wherein said angle of reflection is substantially equal to said angle of illumination; and
a filter positioned between said light source and said surface.
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