Device and method for reading bar code
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United States of America Patent
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-
Aug 24, 1999
Grant Date -
N/A
app pub date -
Apr 10, 1996
filing date -
Apr 13, 1995
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
By a user setting process, the set values of a number of scans and the LED lighting-on pulse-width are written, in advance, into a set value table stored in an EEPROM. Before a measurement starts, a CPU reads out table set values from the EEPROM, and a CCD-drive control circuit drives a CCD image sensor at the maximum operating frequency. After the measurement starts, a light-projection LED drive circuit lights on the light-projection LED array on the basis of the set value of the LED lighting-on pulse-width. The CCD-drive control circuit changes the interval of the outputting of a CCD-drive control signals CD on the basis of the set value of the number of scans.
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