The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 05, 2000
Filed:
Apr. 08, 1999
Maria Lisa Tamanti, Cesena, IT;
Gianfranco Righi, Modena, IT;
Datalogic S.p.A., Bologna, IT;
Abstract
The invention relates to a process for discriminating the color of a surface, comprising the steps of acquiring at least a colored acquisition surface, comparing the color of a detecting surface with said at least one color previously acquired so that said color can be recognized. In particular, the acquisition step comprises the steps of sequentially illuminating the acquisition surface with each of three light beams corresponding to three primary colors, each of said light beams being generated by a respective emission source supplied with a supply current IR, IG, IB; picking up by means of a light-receiving element the light scattered from the illuminated acquisition surface; generating an electric signal VR, VG, VB proportional to the luminous intensity of the picked-up light, as the acquisition surface is being illuminated with each of the three beams and controlling the supply current IR, IG, IB of the emission sources such that at least two of the electric signals VR, VG, VB generated are identical with each other within a predetermined tolerance margin.