Image sensor and image sensing method
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United States of America
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Mar 18, 2025
Grant Date -
Nov 16, 2023
app pub date -
Apr 19, 2023
filing date -
Apr 19, 2023
priority date (Note) -
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Abstract
An image sensor and an image sensing method are provided. The image sensor includes a first pixel circuit, a second pixel circuit, a ramp signal generating circuit, a comparator, and a signal processing circuit. The first pixel circuit has a first floating diffusion node. The second pixel circuit has a second floating diffusion node. The ramp signal generating circuit respectively provides a first ramp signal and a second ramp signal to the first floating diffusion node and the second floating diffusion node during a dark sun detection period. The comparator receives a first node voltage of the first floating diffusion node and a second node voltage of the second floating diffusion node. The signal processing circuit determines whether to output an output signal and determines whether to overwrite a digital value corresponding to a sensing signal according to whether the comparator is triggered.
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