OPTICAL SENSOR CAPABLE OF DETECTING IR LIGHT AND VISIBLE LIGHT SIMULTANEOUSLY
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United States of America Patent
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app pub date -
Apr 14, 2015
filing date -
Mar 25, 2011
priority date (Note) -
Abandoned
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Abstract
An optical sensor includes an image sensor, a proximity sensor and a visible light sensor. The image sensor includes a first pixel and a second pixel. The first pixel is coated with a first optical film for blocking light whose wavelength is outside a first predetermined range and a second optical film for blocking light whose wavelength is outside a second predetermined range. The proximity sensor generates an IR signal according to a first exposure value. The visible light sensing unit generates a visible light signal according to the difference between the first exposure and a second exposure value or according to a ratio of the first exposure value to the second exposure value. The first exposure value represents an incident light quantity which is absorbed by the first pixel. The second exposure value represents an incident light quantity which is absorbed by the second pixel.
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