Registers – Coded record sensors – Particular sensor structure
Patent
1991-03-25
1993-03-23
LaRoche, Eugene R.
Registers
Coded record sensors
Particular sensor structure
235466, 235472, G06K 710
Patent
active
051966840
ABSTRACT:
A method for scanning and decoding the symbols of a bar code label using a CCD image sensor viewing the bar code, and coupled to a signal processor and memory, wherein initially a start of scan (SOS) first level signal is sent from the processor to the CCD image sensor, a digital data signal representative of the bar code is read from the CCD sensor, and the representative data signal read from the CCD sensor is stored in memory. When the SOS signal is at a second signal level, the stored data is validated and decoded to determine if the representative data is valid or invalid. The SOS first level signal is immediately restarted in response to an invalid bar code data signal to recollect bar code data signals from the CCD sensor viewing the bar code so that the scanning steps are repeated, or the SOS first level signal is immediately restarted to re-scan the bar code symbols immediately after the data signal is found valid. Thus, the CCD data collecting scan rate is maximized.
REFERENCES:
patent: 4761544 (1988-08-01), Poland
patent: 4782220 (1988-11-01), Shuren
patent: 4845349 (1989-07-01), Shuren
patent: 4894522 (1990-01-01), Elliot
patent: 4902883 (1990-02-01), Poland
patent: 4963756 (1990-10-01), Quan et al.
Han Wenyu
Knight Gerard J.
Lum Jackson
Zheng Xin
LaRoche Eugene R.
Nguyen Tan
Opticon Inc.
Schanzer Henry I.
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