Patent ID: 7025267
Filing Date: 2006-04-11
Classification: G06K

Abstract:
1. Method for reading a graphic pattern, comprising the steps of: illuminating said graphic pattern with at least two groups of light sources, each of said at least two groups of light sources having at least one light source operating according to an illumination cycle that comprises an illumination cycle-portion and a non-illumination cycle-portion; wherein said light sources of one of said at least two groups of light sources are activated according to equal illumination cycles, wherein said illumination cycles of said light sources belonging to different ones of said at least two groups of light sources have a reciprocally different timing; gathering light from said light sources having been diffused by said graphic pattern on a sensor having a plurality of sensitive points, and converting, through a conversion cycle of said sensor, said light impinging on said plurality of sensitive points, point by point, into electric signals representative of single points of said graphic pattern, at a same time for all of said plurality of sensitive points, said conversion cycle comprising an acquisition step and a non-acquisition step; wherein the acquisition step overlaps at least partially with said illumination cycle-portion of said light sources of each of said groups of light sources.