Barcode scanner with adjustable light source intensity
First Claim
Patent Images
1. A barcode scanner system for reading barcodes, said system comprising:
- a housing having an opening at one end thereof;
a charge coupled device disposed within said housing;
a lens positioned in front of said charge coupled device, said lens being disposed so as to be accessible to light entering said opening to focus said light onto said charge coupled device;
a light source, disposed exterior to said housing to illuminate said barcodes;
decoder means for receiving signals from said charge coupled device; and
a light intensity control means for varying the intensity of light produced by said light source until said decoder indicates that a scanned barcode has been detected.
1 Assignment
0 Petitions
Accused Products
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.
-
Citations
9 Claims
-
1. A barcode scanner system for reading barcodes, said system comprising:
-
a housing having an opening at one end thereof; a charge coupled device disposed within said housing; a lens positioned in front of said charge coupled device, said lens being disposed so as to be accessible to light entering said opening to focus said light onto said charge coupled device; a light source, disposed exterior to said housing to illuminate said barcodes; decoder means for receiving signals from said charge coupled device; and a light intensity control means for varying the intensity of light produced by said light source until said decoder indicates that a scanned barcode has been detected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A barcode scanner system for reading barcodes, said system comprising:
-
a housing having an opening at one end thereof; a charge coupled device disposed within said housing; a lens positioned in front of said charge coupled device, said lens being disposed so as to be accessible to light entering said opening to focus said light onto said charge coupled device; a light source, disposed exterior to said housing to illuminate said barcodes; decoder means for receiving signals from said charge coupled device; and a light intensity control means for continuously varying the intensity of light produced by said light source until said decoder indicates that a scanned barcode has been detected.
-
Specification