| 摘要 |
PROBLEM TO BE SOLVED: To expand a dynamic range by making a value of a saturation level of a low-sensitivity photodiode in a pixel different for each color in a CMOS image sensor. SOLUTION: A solid-state imaging device includes: an imaging area 10 in which a plurality of unit pixels 1 are arranged; and a plurality of color filters including at least first and second color filters having different spectral transmission characteristics. Each unit pixel includes: a high-sensitivity photodiode PD1; a first read transistor READ1 for reading out a signal charge photoelectrically converted by the high-sensitivity photodiode; a low-sensitivity photodiode PD2; a second read transistor READ2 for reading out a signal charge photoelectrically converted by the low-sensitivity photodiode; a floating diffusion FD; a reset transistor RST; and an amplifier transistor AMP. When a saturation level of the low-sensitivity photodiode corresponding to the first color filter is set as QSAT1 while a saturation level of the low-sensitivity photodiode corresponding to the second color filter is set as QSAT2, the relationship QSAT1>QSAT2 is satisfied. COPYRIGHT: (C)2011,JPO&INPIT |
