SOLID-STATE IMAGE SENSING DEVICE
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United States of America Patent
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app pub date -
Mar 20, 2017
filing date -
Oct 18, 2013
priority date (Note) -
Abandoned
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Abstract
A CMOS image sensor used as a solid-state image sensing device includes a pixel circuit for outputting a voltage of a level corresponding to the illuminance, and an A/D converter for converting an output voltage of the pixel circuit into a digital signal. The resolution on the low illuminance side is higher than the resolution on the high illuminance side in the A/D converter. Thus, the dynamic range can be increased and the operation speed can be increased, compared to the case in which the resolution is constant independent of the illuminance.
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