Code reader and code reading method for reading code printed on surface of printing medium
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United States of America Patent
Stats
-
Dec 23, 1997
Grant Date -
N/A
app pub date -
Jul 10, 1995
filing date -
Jul 15, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A code reader, for reading a code printed on a surface of a printing medium, includes a photoelectric device for converting light reflected from the code into an electric signal. An amplifier is provided for amplifying the electric signal converted by the photoelectric device. A gain adjusting device is provided for adjusting a gain of the amplifier such that a summit level of the electric signal can be raised to a predetermined upper limit level. A digitizing device is provided for converting the electric signal amplified by the amplifier into a binary signal, using a predetermined level.
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