| 摘要 |
A signal charge corresponding to an incident light quantity is accumulated in a first node of each pixel circuit. An accumulated charge exhaust circuit includes each of first nodes of the plurality of pixel circuits belonging to the same pixel group, and a second node connected through discharge gates functioning as variable resistance elements. Second node functions as a floating drain during an ON period of a control switch, while accumulating the signal charge overflowing from each pixel circuit, in a capacitor during an OFF period of control switch provided at an intermediate timing in one frame period. When the incident light to the pixel group is intense, a resistance value of each discharge gate is lowered in response to an increase of the signal charge accumulated in capacitor, so that the signal charge accumulated in each pixel circuit can be exhausted once at the above intermediate timing.
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