Method for controlling bar code reading in bar code reader
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United States of America Patent
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Sep 14, 1993
Grant Date -
N/A
app pub date -
Nov 15, 1991
filing date -
Jun 20, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method for controlling bar code reading, by which a CCD shift pulse signal and a LED control signal are delivered from a bar code reading control circuit comprising a multiplexer, a counter, two monostable multivibrators and a plurality of logic circuits or a CPU provided with an ROM in which a bar code reading program is stored and a logic unit, the on time of a light emitting diode (LED) which projects a light onto the bar code and the time of bar code information input by a charge coupled device (CCD) are shortened for supplying a bar code signal to the CCD, while the time of bar code reading out by the CCD is lengthened for delivering the bar code information as analog signal from the CCD.
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