Scanning device, its supplementary light control system and control method

Abstract

The present invention provides a scanning device, its supplementary light control system and method. The scanning device comprises: a scanning engine for collecting images and at least two supplementary lights for illuminating when the scanning engine is collecting images. The supplementary light control system includes: a supplementary light control unit, used to control at least two of the supplementary lights to emit light; an exposure control unit, used to control the exposure time of the scanning engine; a main control unit, the main control unit The unit is connected with the supplementary light control unit, and is used to control at least two supplementary light lamps to emit light alternately through the supplementary light control unit and to control the exposure time of the scanning engine to be shorter than the supplementary light through the exposure control unit. The light emitting time of a single light. It irradiates the barcode from multiple different angles through multiple indicator lights that glow alternately, reducing the influence of reflected light and improving the success rate of decoding.

Description

technical field [0001] The invention relates to a system and method for controlling a supplementary light of a scanning device, in particular to a system and a method for controlling a supplementary light for improving the decoding efficiency of a scanning device. Background technique [0002] In the barcode scanning industry, when the intensity of natural light or indoor fluorescent light cannot meet the light intensity requirements of the imaging system of the barcode reading equipment, practitioners usually use additional light sources to supplement the barcode to be read. [0003] At first, most of the industry used a single point light source for fill light. Later, in order to achieve a better fill light effect, it was gradually changed to multiple point light sources for fill light at the same time. However, whether it is a single point light source or multiple point light sources, there will be a certain amount of reflected light that will affect the reading of barcod...

AI Technical Summary

Problems solved by technology

However, whether it is a single point light source or multiple point light sources, there will be a certain amount of reflected light that will affect the reading of barcodes, especially when reading barcodes on smooth surfaces such as metal surfaces or glass surfaces. When, the influence of reflected light is particularly obvious, resulting in unreadable barcodes

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