Optical reader comprising multiple color illumination
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United States of America Patent
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Dec 21, 2004
Grant Date -
Apr 3, 2003
app pub date -
Mar 7, 2002
filing date -
Oct 4, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
An imaging module in one embodiment includes at least one multiple color emitting light source comprising a plurality of different colored LED dies each independently driveable so that the overall color emitted by the light source can be controlled and varied. The multiple color emitting light source can be controlled so that the color emitted by the light source is optimized for imaging or reading in a present application environment of the module. Further, the module can be configured so that control of the multiple color emitting light source automatically varies depending on a sensed condition, such a color present in a field of view of the module, the distance of the module to a target, and/or a predetermined criteria being met so that feedback is provided to a user. The module in a further aspect can include illumination light sources and aiming light sources which project light in different wavelength emission bands.
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