Registers – Coded record sensors – Particular sensor structure
Patent
1994-09-27
1996-04-23
Hajec, Donald T.
Registers
Coded record sensors
Particular sensor structure
235462, 235455, G06K 710
Patent
active
055106072
ABSTRACT:
An optical code reader includes a reading window, a reading control circuit for sensing an image of a 2-dimensional code via the reading window and for converting the sensed image into image data, and a portable frame having an opening used as the reading window, for accommodating the reading control circuit. In the optical code reader, the reading control circuit includes a trigger switch for issuing a reading instruction with the reading window set within a preset distance from the 2-dimensional code, an illumination light source for applying an illumination light via the reading window for a preset period after the reading instruction is issued by the trigger switch, an image sensing section for sensing the image of the 2-dimensional code based on a reflected light obtained when the 2-dimensional code is illuminated by the illumination light source, and a light source controller for elongating the period of activation of the illumination light source when the reading instruction is continuously issued for a period longer than the preset period.
REFERENCES:
patent: 4387297 (1983-06-01), Swartz et al.
patent: 4639606 (1987-01-01), Boles et al.
patent: 5021642 (1991-06-01), Chadima, Jr. et al.
Hajec Donald T.
Kabushiki Kaisha TEC
Lee Michael G.
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