Patent ID: 11350044

Abstract:
A pixel PXL includes a first photodiode PDSL and a second photodiode PSLS having different well capacities and responsivities, transfer transistors TGSL-Tr, TGLS-Tr for transferring the charges stored in the photodiodes to a floating diffusion FD, and a capacitance changing part 80 for changing the capacitance of the floating diffusion depending on a capacitance changing signal. The first well capacity of the first photodiode PDSL is smaller than the second well capacity of the second photodiode PDLS, and the first responsivity of the first photodiode PDSL is larger than the second responsivity of the second photodiode PDLS. With these configurations, it becomes possible to realize a widened dynamic range, prevent the read-out noise from affecting the performance, and eventually achieve improved image quality.