Ambient light detector, laser lighting control device using the same suitable for bar code reader, and bar code reader
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United States of America Patent
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Feb 13, 1996
Grant Date -
N/A
app pub date -
Apr 28, 1994
filing date -
Aug 10, 1993
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention relates to an ambient light detector, a laser lighting control device using the same suitable for a bar code reader, and a bar code reader. The object is to require no explanation on a special operation and to realize an easy device design and a low manufacturing cost. Each device includes an ambient light detector to detect light around a peripheral device, and judging device to provide a signal indicating that an ambient light detected by the ambient light detector has exceeded a predetermined value over a predetermined time.
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