Optical code reader having an illumination light source emitting light for at least a preset period responsive to operation of a trigger switch
US5510607A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 27, 1994 |
| Grant date | Apr 23, 1996 |
| Priority date | — |
| Expiry date | Sep 27, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K2207/1018
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.