Method for controlling bar code reading in bar code reader

Details Method for controlling bar code reading in bar code reader Method for controlling bar code reading in bar code reader

1991-11-15

1993-09-14

Fields, Carolyn E.

Registers

Coded record sensors

Particular sensor structure

235466, 235472, G06K 710

Patent

active

052451682

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.

REFERENCES:
patent: 3796862 (1974-03-01), Asija
patent: 4140271 (1979-02-01), Nojiri et al.
patent: 4232216 (1980-11-01), Helle
patent: 4656345 (1987-04-01), Kurimoto
patent: 4680457 (1987-07-01), Robertson
patent: 4806741 (1985-02-01), Robertson
patent: 5135160 (1992-08-01), Tasaki

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