摘要 |
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.
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申请人 |
SYMBOL TECHNOLOGIES, INC. |
发明人 |
DVORKIS, PAUL;BARKAN, EDWARD;CHARYCH, HAROLD;GIEBEL, JAMES;OSTERWEIL, STEPHEN;KUMAR, SUNDEEP;BARILE, JOHN;POLONIEWICZ, PAUL R.;BIUSO, ANTHONY D.;CHEW, STEVEN M. |