METHOD AND SYSTEM OF DETECTING FLICKERING FREQUENCY OF AMBIENT LIGHT SOURCE
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United States of America Patent
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Issued Date -
Jul 31, 2014
app pub date -
Oct 16, 2013
filing date -
Jan 28, 2013
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method of detecting a flickering frequency of an ambient light source includes the following steps. First, a light intensity of the light source is sensed in a predetermined time period according to a sampling frequency to obtain a plurality of sample values. Then, the sample values are calculated to obtain a median value. Next, the sample values are binarized according to a result of a comparison between the sample values and the median value to obtain a first sequence. The first sequence is differentiated to obtain a second sequence, and the second sequence includes numbers −1, 0, and 1. Then, a distance between the same numbers in the second sequence is calculated, and the sampling frequency is divided by the distance to obtain the flickering frequency of the ambient light source. A system of detecting a flickering frequency of an ambient light source is also disclosed herein.
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