| 摘要 |
To provide an imaging device having a multi-pixel cell MOS image sensor in which, even when a charge overflows to a detection part as a result that strong light falls on one photodiode and causes the photodiode to saturate, the overflowing charge can be prevented from leaking to another unsaturated photodiode. The imaging device includes a plurality of unit cells each of which includes N photodetectors, one detection part, N read transistors, one reset transistor, and one amplification transistor. Each read transistor switches ON and OFF between a corresponding photodetector and the detection part, thereby causing luminance information in the photodetector to be moved to the detection part. The reset transistor switches ON and OFF between a power supply terminal and the detection part. The amplification transistor amplifies the moved luminance information. Each of the N read transistors is an enhancement transistor, and the reset transistor is a depression transistor.
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