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. 03, 1996
Filed:
Dec. 06, 1994
Chin-Long Chen, Fishkill, NY (US);
Mu-Yue Hsiao, Poughkeepsie, NY (US);
Surasak K O'Trakoun, Poughkeepsie, NY (US);
Charles F Pells, Wappingers Falls, NY (US);
William W Shen, Poughkeepsie, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A barcode scanner, which is particularly suitable for reading barcode information from surfaces having various reflective properties, includes a light intensity control for the light source of the barcode scanner. The light intensity control preferably comprises a means for ramping voltage and a summing circuit which allows the current flowing through the light source to be controlled. In addition, the light intensity control utilizes a clocking means which controls the rate of voltage ramping.