| 摘要 |
A solid-state image pick-up device and a method of reading out a pixel signal thereof are provided, and the solid-state image pick-up device provides a large dynamic range without an increase in the area of a pixel. Plural pixels are arranged therein. Each pixel includes a first potential well PW1 for storing charges generated by light; a charge-distributing-potential barrier CDB adjacent to the first potential well PW1; a second potential well PW2 opposite to the first potential well PW1 with respect to the charge-distributing-potential barrier, the second potential well PW2 storing charges generated by light of an identical intensity, the charges stored in the second potential well PW2 being less than the charges stored in the first potential well PW1; first and second transfer gate electrodes 31 and 32 for transferring the charges stored in the first and second potential wells PW1 and PW2, respectively; and first and second floating-diffusion regions 26 and 27 for separately storing the charges transferred by the first and second transfer gate electrodes 31 and 32, respectively.
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