公开(公告)号：AU7204501A

公开(公告)日：2002-05-23

申请号：AU7204501

申请日：2001-09-13

Applicant: SYMBOL TECHNOLOGIES INC

Inventor： SHELLHAMMER STEPHEN J ,  BEACH ROBERT ,  TILLEY PATRICK ,  CABANA JOSEPH ,  SACKETT WILLIAM ,  CONNOLLY SEAN A ,  BIUSO ANTHONY D ,  SHARONY JACOB

IPC: H04L12/28 ,  H04L12/46 ,  H04L12/56 ,  H04M1/725 ,  H04L12/66

公开(公告)号：CA2161357A1

公开(公告)日：1996-05-01

申请号：CA2161357

申请日：1995-10-25

Applicant: SYMBOL TECHNOLOGIES INC

Inventor： DVORKIS PAUL ,  BARKAN EDWARD ,  CHARYCH HAROLD ,  GIEBEL JAMES ,  OSTERWEIL STEPHEN ,  KUMAR SUNDEEP ,  BARILE JOHN ,  POLONIEWICZ PAUL R ,  BIUSO ANTHONY D ,  CHEW STEVEN M

IPC: G06K7/10 ,  G06K7/14 ,  G06K9/20 ,  G06K9/62

Abstract: A scanner determines whether a target is a bar code symbol and, if so, whether that symbol is one-dimensional or two-dimensional. For two-dimensional symbols, the scanner aligns a scanning pattern with the symbol and expands the scanning pattern to reach only to the top and bottom edges of the symbol, not beyond. The scanner also has a microprocessor-control scanning engine that uses a coil to drive a scanning element and pick up feed back signals from the scanning element. A pulse-width-modulated regulator also provides fast and efficient operation for driving the coil. The scanning engine can also be designed to generate a pattern that precesses across the target, and a powerful interface to the scanning engine allows decoding and control logic to work efficiently with and independently of the scan engine.