SOLID STATE IMAGING DEVICE

• Main Authors: SUGAWA SHIGETOSHI, TAKUBO KENJI, TOMINAGA HIDEKI, KONDO YASUSHI, KURODA MICHIHITO
• Format: Patent
• Language: English
• Published: 09.12.2013
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; PICTORIAL COMMUNICATION, e.g. TELEVISION; SEMICONDUCTOR DEVICES

PROBLEM TO BE SOLVED: To provide a solid state imaging device capable of faster imaging than conventional one.SOLUTION: A solid state imaging device includes a PD 11 for photoelectric conversion of signal light incident from backside, an FD 13 for converting an electric charge of a signal to a voltage signal, and a memory part 2, for storing image signals for a plurality of image frames, disposed adjacent to each pixel 1 including source follower amplifier 15. The memory part 2 includes a CCD register 2B and a switch 21 for directly writing a voltage signal to each CCD 22 of the register 2B. At imaging, every time a frame of imaging signal is obtained, the signals are sequentially written to the CCD 22 through a closed switch 21. At signal reading, electric charge transfer of the CCD is used. The imaging device is capable of fast writing at a low driving current because of light load of the amplifier 15, since each pixel 1 and the memory part 2 are close, and a wiring length of their connection is short. Power consumption is low at the time of imaging, since the CCD 22 is not driven.